Appendix A Decoding Parameters

Table of Contents

Disk Devices Using 310X Controllers
Tape Subsystems Using the 3202 Tape Controller
3206, 3207, and 3208 Downloadable Tape Controllers
3209 Downloadable Tape Controller
3211, 3214, 3215, and 3681 Controllers
5512, 5515, 5516, and 5518 Matrix Printers
5520 Serial Matrix Printer
5530 Letter-Quality Printer
5573 Nonimpact Page Printer
Data Communications Lines
NonStop VLX and NonStop Cyclone $OSP (LDEV 3)

Operator messages sent by certain disk and tape subsystems, printers, and data communications lines include device status and parameter information, and in some cases, termination codes. This appendix lists the device status (dev-status), parameter values (param), and in some cases, termination codes returned in operator messages for the following devices:

Disk devices using 310X controllers
Tape subsystems using the 3202 tape controller
3206, 3207, 3208 downloadable tape controllers
3209 downloadable tape controller
3211, 3214, 3215, and 3681 controllers
5512, 5515, 5516, and 5518 matrix printers
5520 serial matrix printer
5530 letter-quality printer
5573 nonimpact page printer
Data communications lines
NonStop VLX and NonStop Cyclone $OSP (LDEV 3)

Disk Devices Using 310X Controllers

Operator messages sent by disk devices using 310X controllers include device status information and up to four parameters of other data.

Device Status

dev-status is the status word returned from the 310X controller. Table A-1 shows the format of dev-status. For the termination codes, see Table A-2.

Table A-1 Format of dev‑status for 310X Controllers

Bit	Meaning (if Set On)
.<0>	Controller powered on
.<1>	Termination code
.<2>	Termination code
.<3>	Termination code
.<4>	Termination code
.<5>	Termination code
.<6>	Termination code
.<7>	Termination code
.<8>	Read only^[1]
.<9>	Unit ownership error^[1]
.<10>	Write fault^[1]
.<11>	Seek error^[1]
.<12>	Not on cylinder^[1]
.<13>	Not ready^[1]
.<14>	Unit type
.<15>	Unit type
^[1]Bits <8:13> are valid only if the termination code in <1:7> is equal to %7.

Termination Codes

Table A-2 lists the termination codes for disk devices using 310X controllers (bits <1:7> of dev-status).

Table A-2 Termination Codes for Disk Devices

Device Status	Termination Code	Meaning
%------	%0	Successful completion
%-004--	%1	Attention (seek completion or head load)
%-010--	%2	Data error corrected
%-014--	%3	Write protect
%-020--	%4	Illegal address
%-024--	%5	Direct access to alternate track
%-030--	%6	Illegal opcode
%-034--	%7	Unit status error (bits <8:13> of dev-status are valid)
%-040--	%10	Buffer parity error
%-044--	%11	Uncorrectable data error
%-050--	%12	Missing servo check during write
%-054--	%13	Verify error
%-060--	%14	Header search failure
%-064--	%15	Header miscompare
%-070--	%16	ROM parity error
%-074--	%17	Unit not present
%-100--	%20	Unit present more than once
%-104--	%21	Unit ownership error
%-110--	%22	Unit not ready
	%23-%33	Termination codes %23 through %33 indicate that the controller succeeded in retrying a failed read operation by using a margin‑offset, error‑recovery technique. The specific termination code indicates which of the nine offset combinations succeeded in the retry.
%-160--	%34	Controller malfunction. Termination code %34 indicates an idle‑loop diagnostic error. (When the controller is idle—not busy servicing an I/O request—the controller performs diagnostic routines that check its internal registers and buffers. On discovering an internal error, the controller removes itself from the system by rejecting subsequent I/O requests and setting the termination code to %34. To reset the controller, turn its power off and then on again.)
%-200--	%40^[1]	Checksum error detected in the data block received for a Load LOCS
%-204--	%41^[1]	Controller detected an invalid control store address or byte count in the block received for a Load LOCS or Define Return Control Block
%-210--	%42^[1]	Self-test failed
%-214--	%43^[1]	Power-up test failed
%-220--	%44^[1]	Checksum error in NVRAM DATA
%-224--	%45^[1]	NVRAM has been written over 1000 times
%-230--	%46^[1]	O BUS parity error: write transfer
%-234--	%47^[1]	I BUS parity error: read transfer
%-240--	%50^[1]	ECC error on boot read
%-244--	%51^[1]	Controller detected a miscompare in the part number or the serial number received in the Update Revision Block and the numbers contained in its NVRAM storage
%-250--	%52^[1]	Not enough data received to perform operation
%-254--	%53^[1]	Parameter count not 0 when command count exists
%-260--	%54^[1]	Command count greater than 30720
%-264--	%55^[1]	Device interrupts have been masked off
%-270--	%56^[1]	Illegal unit mask parameter
%-274--	%57^[1]	Write parity error
%-280--	%60^[1]	Illegal parameter for identify device
%-284--	%61^[1]	Checksum error while reading NVRAM
%-760--	%174	Software detected a faulty structured block. (DP2 read a structured block with no I/O errors and with correct structured and unstructured checksums. However, the block failed to pass a simple integrity check. If the block is incorrect on both mirrored halves, or if a mirrored disk is unavailable, the block is handled like a bad file.)
%-764--	%175	Software detected structured checksum error
%-770--	%176	Interrupt overrun occurred
%-774--	%177	Software detected unstructured checksum error. If the termination code is %177, the logical byte address is the sector in error.
^[1]Termination codes %40 through %61 apply only to the 3107 and 3108 downloadable disk controllers.

Parameters

Operator messages sent by disk devices using 310X controllers include up to four params and termcode values, as follow.

%param1

%param1 is the read interrupt cause (RIC) word received from the disk controller. The values defined for the RIC word are:

Bit	Meaning
<0>	Power-on flag
<1:7>	Termcode
<8:13>	Device status flags
<14:15>	Unit type bits

Termcode Values

Termcode values indicate the outcome of disk operations and are in the ranges %0 through %77 and %174 through %177. The termcode field also reports information requested by special commands such as “read microcode PROM version” and “read unit literal PROM version.” To avoid confusion with termcodes, the version values are currently in the range %100 through %121.

%param2 and %param3

%param2 and %param3 are the high-order and low-order words of the 32-bit, disk‑relative byte address associated with the command (if any).

%param4

%param4 is the command and sector count. The format is:

Bits	Meaning
<0:7>	Disk controller command
<8:15>	Number of sectors to be transferred (if any)

The controller command %030000 in the %param4 field means “read programmable read-only memory (PROM) microcode version” and determines whether the disk controller has sufficient capability for the configuration given. The version is returned in the termcode field of the resulting interrupt. The following list shows the version values. The second column shows the format displayed in the left byte of an octal 16-bit word, as in %param1.

Version Value	Version in Left Byte	Controller
%100	%0400xx	3106, rev A
%101	%0404xx	3106, rev B
%102	%0410xx	3106, rev C
%103	%0414xx	3106, rev D
%104	%0420xx	3106, rev E
%120	%0500xx	3107
%121	%0504xx	3108

DP2 supports only version values %104, %120, and %121. Moreover, if a controller is configured as 3107, the controller must be either version %120 or %121.

If DP2 returns a controller microcode PROM version that is illegal, it displays a message that specifies the termcode in %param1. DP2 also brings down all paths through the specified controller. If DP2 brings down the paths on both controllers to the system disk, the processor freezes one minute after system loading with halt code %2002. To determine why the system disk did not come up, you must examine all returned operator messages.

Tape Subsystems Using the 3202 Tape Controller

For tape subsystems using the 3202 tape controller, dev-status is the read interrupt cause (RIC) word returned from the controller, as illustrated in Figure A-1.

Figure A-1 Format of dev-status Returned by the 3202 Tape Controller

The values defined for the RIC word returned from the controller are:

RIC Word Value	Meaning
PON	Controller powered on
ATT	Attention interrupt
RT	Runaway tape
UE	Unusual end
OV	Data overrun
DPE	Data parity error
CRC	CRC error
SR	Short read
WV	Write violation
B	Busy
NR	Not ready
TR	Tape rewinding
EOF	End of file
EOT	End of tape
WR	Write ring in place
BOT	Load point

3206, 3207, and 3208 Downloadable Tape Controllers

For the 3206, 3207, and 3208 downloadable tape controllers, dev-status is the read interrupt cause (RIC) word returned from the controller, as illustrated in Figure A-2.

Figure A-2 Format of dev-status Returned by 3206, 3207, and 3208 Downloadable Tape Controllers

The values defined for the RIC word returned from the controller are:

RIC Word Value	Meaning
PON	Controller powered on
BOT	Beginning of tape
EOF	End of file
EOT	End of tape
ONL	Online
WR	Write ring in place
REW	Rewinding
0	Reserved
TERMCODE	Termination code

Termination Codes

Table A-3, Table A-4, and Table A-5 list the termination codes for the 3206, 3207, and 3208 downloadable tape controllers respectively (returned in bits <9:15> of the RIC word).

Table A-3 Termination Codes for 3206 Tri-Density Tape Controllers

Code in Octal	Code in Decimal	Meaning
%000	0	No error
%001	1	Attention—the online button pressed, or the drive, formatter, or controller powered on
Software operational errors. The operation finished. No corrective action is needed.
%043	35	Bad length
%044	36	Write retried
%045	37	Read retried
%046	38	Skip residue
%047	39	Correctable data
Hardware operational errors. The operation failed. The error is either a media or drive failure.
%050	40	Uncorrectable data
%051	41	Formatter command reject
%052	42	Operation failure
%053	43	Write failure
%054	44	Undefined command
%055	45	Bad microcode file
%056	46	Large read
%057	47	Runaway tape
%060	48	Not ready
%061	49	Channel error
%062	50	Formatter power off
%063	51	Drive power off
Intermittent software self-test failures. Informational only. Retry the operation.
%106	70	Z80 test failure
%107	71	Parity checker test failure
%110	72	Write-read loop failure
%111	73	Control registers failure
%112	74	Memory test failure
%113	75	DMA watchdog timer failure
Hardware self-test errors. The controller continues to respond to each EIO with the same error until either the controller is reset (by a PUP LOADMICROCODE command for D-series) or powered off or the processor is reset.
%126	86	Z80
%127	87	Parity
%130	88	Write-read loop
%131	89	Register
%132	90	Buffer
%133	91	CTC
Hardware controller errors. The controller continues to respond to each EIO with the same error until either the controller is reset (by a PUP LOADMICROCODE command for D-series) or powered off or the processor is reset.
%146	102	Z80 parity
%147	103	Freeze timeout
%150	104	External interrupt
%151	105	Bad memory access
%152	106	Operation timeout
%153	107	OBUS parity
%154	108	FCU ROM parity
%155	109	Adapter failure
%156	110	FCU command NAK

Table A-4 Termination Codes for 3207 Tape Controllers

Code in Octal	Code in Decimal	Meaning
%000	0	No error
%001	1	Attention—the online button was pressed, or the drive, formatter, or controller was powered on
Software operational errors. The operation finished. No corrective action is needed.
%043	35	Incorrect length—short read on channel transfer
%044	36	Write operation retried
%045	37	Read operation retried
%046	38	Skip count residue
%047	39	Correctable data error occurred on read operation
Hardware operational errors. The operation failed. The error is either a media or drive failure. Retry the operation.
%050	40	Uncorrectable data error
%051	41	Runaway tape
%052	42	Operation error (ID-burst error on PE read)
%053	43	Write failure
%054	44	Erase failure
%055	45	NVRAM has been written to over 1000 times
%056	46	NVRAM checksum is bad
%057	47	Not a WCS command
%060	48	Illegal program file format
%061	49	Drive not ready
%062	50	Drive power off
%063	51	Illegal drive status
%064	52	Channel error
%065	53	Channel interface error, or DMA error on channel write operation
%066	54	Formatter error
%067	55	Tape error, drive interface error, or formatter DMA transfer error
Intermittent software self-test failures. Informational only. Retry the operation.
%106	70	68000 test failure
%107	71	Parity checker test failure
%110	72	Write-read loop failure
%111	73	Control registers failure
%112	74	Memory test failure
%113	75	DMA watchdog timer failure
%114	76	Formatter timer failure
%115	77	Bad checksum match between channel port and formatter
Microcode. These errors are used only in cases where the microcode has been downloaded.
%116	78	Loop back error bit in formatter is set
%117	79	Formatter counter error
%120	80	LRC error during NRZI check
%121	81	CRC error during NRZI check
%122	82	Single-track error
%123	83	Multiple-rack error
Hardware self-test errors. The controller responds to each EIO with the same error until either the controller is reset (by a PUP LOADMICROCODE command for D-series) or powered off or the processor is reset.
%127	87	Parity checker test failure
%130	88	Write-read failure
%131	89	Control registers failure
%132	90	Memory test failure
%133	91	DMA watchdog timer failure
%134	92	Formatter timer failure
Hardware controller errors. The controller responds to each EIO with the same error until either the controller is reset (by a PUP LOADMICROCODE command for D-series) or powered off or the processor is reset.
%146	102	Microprocessor bus failure
%147	103	Controller frozen
%150	104	Short write to tape
%151	105	Bad memory access
%152	106	Operation timeout
%153	107	O-bus parity-generation error

Table A-5 Termination Codes for 3208 200-ips Tape Controllers

Code in Octal	Code in Decimal	Meaning
%000	0	No error
%001	1	Attention—online button pressed or drive, formatter, or controller powered on
Software operational errors. The operation is finished. No corrective action is needed.
%043	35	Incorrect length—short read on channel transfer
%044	36	Write operation retried
%045	37	Read operation retried
%046	38	Skip count residue
%047	39	Correctable data error occurred on read operation
Hardware operational errors. The operation failed. The error is either a media or drive failure. Retry the operation.
%050	40	Uncorrectable data error
%051	41	Runaway tape
%052	42	Operation error (ID-burst error on PE read)
%053	43	Write failure
%054	44	Erase failure
%055	45	NVRAM has been written to over 1000 times
%056	46	NVRAM checksum is bad
%057	47	Not a WCS command or command reject
%061	49	Drive not ready
%062	50	Drive power off
%063	51	Illegal drive status
%065	53	Channel interface or DMA error
%066	54	Formatter error
%067	55	Drive or formatter interface error
%070	56	Formatter power off
%071	57	Error counter overflow
%072	58	Data path parity error
%073	59	Short write
Intermittent software self-test failures. Informational only. Retry the operation.
%106	70	68000 test failure
%107	71	Parity checker test failure
%110	72	Write-read loop failure
%111	73	Control registers failure
%112	74	Memory test failure (buffer)
%113	75	DMA watchdog timer failure
%114	76	Memory test failure (WCS)
%116	78	Formatter data path error
%117	79	Formatter data overrun
%120	80	Formatter data bus parity
%121	81	Formatter ROM parity check

3209 Downloadable Tape Controller

For the 3209 downloadable tape controller, dev-status is the interrupt status word returned from the controller, as illustrated in the following figure:

Figure A-3 Format of dev-status Returned by the 3209 Downloadable Tape Controller

The values defined for the interrupt status word returned from the controller are:

Interrupt Status Word Value	Meaning
PON	Controller powered on
BOT	Beginning of tape
EOF	End of file
EOT	End of tape
ONL	Online
WEN	Write enabled
REW	Rewinding
0	Reserved
TERMCODE	Termination code

Termination Codes

Table A-6 lists the termination codes for the 3209 downloadable tape controller (returned in bits <9:15> of the interrupt status word).

Table A-6 Termination Codes for 3209 Tape Controllers

Code in Octal	Code in Decimal	Meaning
%000	0	No error
%001	1	Attention—the online button was pressed, or the drive, formatter, or controller was powered on.
Software operational errors. The operation finished. No corrective action is needed.
%043	35	Incorrect length—short read on channel transfer
%044	36	Write retried
%045	37	Read retried
%046	38	Skip residue
%047	39	Correctable data
Hardware operational errors. The operation failed. The error is either a media or drive failure.
%050	40	Uncorrectable data
%051	41	Runaway tape
%052	42	Operation failure
%053	43	Write failure
%055	45	NVRAM written 1000 times
%056	46	NVRAM checksum incorrect
%057	47	Command reject
%060	48	Illegal program file format
%061	49	Drive not ready
%062	50	Drive power off
%064	52	Channel error
%065	53	Channel interface or DMA error
%066	54	Formatter error
%067	55	Formatter/drive interface or DMA error
%070	56	Controller data error
%071	57	Physical end of tape
%074	60	Cable open
Intermittent software self-test errors. The controller ignores each EIO, resulting in an error 214, until it is reset either by loading microcode or by issuing a Subsystem Control Facility (SCF) PRIMARY DISK command (for G-series) or a PUP PRIMARY command (for D-series) to the other channel.
%106	70	68000 failure
%112	74	Buffer RAM failure
%114	76	WCS checksum error
%116	78	Formatter self-test failure

3211, 3214, 3215, and 3681 Controllers

For the 3211, 3214, 3215, and 3681 controllers, dev-status is the interrupt status word returned from the controller, as illustrated in Figure A-4.

Figure A-4 Format of dev-status Returned by the 3211, 3214, 3215, and 3681 Controllers

The values defined for the interrupt status word are:

Interrupt Status Word Value	Meaning
PON	Controller powered on
BOT	Beginning of tape
EOF	End of file
EOT	End of tape
ONL	Online
WEN	Write enabled
REW	Rewinding
0	Reserved
TERMCODE	Termination code

Termination Codes

Table A-7 lists the termination codes for the 3211, 3214, 3215, and 3681 controllers (returned in bits <8:15> of the interrupt status word).

Table A-7 Termination Codes for 3211, 3214, 3215, and 3681 Controllers

Code in Octal	Code in Decimal	Meaning
%000	0	No error
%001	1	Attention—the online button was pressed, or the drive, formatter, or controller was powered on.
%017	15	Reserved
Software operational errors. The operation finished. No corrective action is needed.
%020	16	Operation finished
%043	35	Incorrect length—short read on channel transfer
%044	36	Write retried
%045	37	Read retried
%046	38	Skip residue
%047	39	Correctable data error
Command exceptions
%060	48	Command reject—operation did not finish
%061	49	Illegal program file format
%062	50	Invalid LPRM/parameters
%063	51	Invalid device ID
%071	57	Physical end of tape
%072	58	Invalid SCSI command descriptor block
%073	59	Short write
%117	79	Reserved
Channel interface exceptions and hardware operational errors
%120	80	Channel transfer error or operator failed—media or hardware
%121	81	Channel T-bus sequence error
%122	82	Channel interface timeout
%123	83	Channel checksum error
%124	84	Channel unexpected truncation on data IOC
%125	85	Channel parity error
%126	86	Channel abnormally terminated operation
Channel interface exceptions and hardware operational errors (continued)
%127	87	Channel/LB loopback data miscompare error
%130	88	Channel error
%131	89	Channel DMA databus error
%157	111	Reserved
Controller exceptions
%160	112	False interrupt error
%161	113	Microprocessor error
%162	114	Watchdog timer timeout
%163	115	Timer malfunction
%164	116	Controller identification error
%165	117	Bootstrap memory error
%166	118	Loadable control store address error
%167	119	Loadable control store data parity error
%170	120	Data buffer address error
%171	121	Data buffer data error
%172	122	Download firmware checksum error
%173	123	SEEROM checksum error
%174	124	Timeout waiting for data buffer space
%175	125	Controller power-on test failed
%176	126	Controller self-test failed
%177	127	SPC gate array error
%200	128	DMA gate array error
%201	129	APC0 gate array error
%202	130	APC1 gate array error
%203	131	DRAM memory failure
%204	132	SRAM memory failure
%205	133	LB/AB loopback data miscompare error
%206	134	LB/Device connector loopback data miscompare error
%207	135	AB/Device connector loopback data miscompare error
%210	136	Timer chip error
%211	137	Fiber optic retry
%212	138	DCM gate array error
Controller exceptions (continued)
%213	139	BEB error
%214	140	EEPROM checksum error
%215	141	AB/BEB link error
%216	142	More than one command received on single unit
%237	159	Reserved
Controller to device interface exceptions
%240	160	Device interface parity error (controller detected)
%241	161	Device interface parity error (device detected)
%242	162	Device interface protocol error (controller detected)
%243	163	Device interface protocol error (device detected)
%244	164	Device interface command exception
%245	165	Device interface status exception
%246	166	Device interface timeout
%247	167	SCSI interface bus hang
%250	168	SCSI cable/connector not installed
%251	169	Synchronous transfer offset error
%252	170	Interface cable loopback data error
%253	171	Cable not installed
%255	173	SCSI bus reset coming in
%257	175	TMDS error reporting (D-series only)
%260	176	TMDS error reporting (D-series only)
%261	177	Disconnect In condition reported
Device exceptions
%277	191	Reserved
%300	192	Uncorrectable read data error
%301	193	Uncorrectable write data error
%302	194	Drive not ready
%303	195	Selection error
%304	196	No device responding
%305	197	Unexpected device interrupt
%306	198	Unspecified device hardware equipment check
%307	199	Tape drive cover open
%310	200	Device aborted command
%311	201	Device power is off
%312	202	Formatter power is off
%313	203	Motion command timed out
%314	204	Formatter hardware equipment check
%320	208	Drive status bad (online -> offline)
%321	209	Drive hardware equipment check
%322	210	Loss of tape tension
%323	211	Retry data transfer request
%324	212	Error in auto cartridge loader hardware
%337	223	Reserved
Media exceptions
%340	224	Attempted to read past last data on tape
%341	225	ID burst error on tape
%342	226	Write ring not installed
%343	227	Nonrecoverable error due to medium flaw or dirty head
%344	228	Fatal error in the media
%345	229	Read drive status, no retry needed
%346	230	Read drive status, retry the operation
%347	231	Error occurred, retry the operation
%357	239	Reserved
Read SEEROM and write SEEROM errors
%360	240	Reserved
%361	241	SEEROM bounds violation
%362	242	SEEROM handshake timeout
%363	243	SEEROM write error
%377	255	Unknown error

5512, 5515, 5516, and 5518 Matrix Printers

Operator messages sent by the 5512 serial matrix printer and the 5515, 5516, and 5518 line matrix printers include device status information and up to two parameters of other data.

Device Status

dev-status is the primary status word returned from the printer. Table A-8 shows the format of dev-status.

Table A-8 Format of dev-status for Matrix Printers

Bit	Meaning
.<0:8>	Not defined
.<9:11>	Encoded full status field:
	0: Partial status
	1: Full status
	2: Reserved
	3: Reserved
	4: Full status / data parity error
	5: Full status / buffer overflow
	6: Reserved
	7: Auxiliary status available
.<12>	Buffer full
.<13>	Paper out
.<14>	Device power on
.<15>	Device not ready

Parameters

param1 is the auxiliary status word if dev-status.<9:11> is 7. Otherwise, param1 is 0. The format of this word is:

Bit	Meaning
.<0:8>	Not defined
.<9:15>	Set to 03

param2 is the file-system error. For information on file-system errors, see Appendix B.

5520 Serial Matrix Printer

Operator messages sent by the 5520 serial matrix printer include device status information and up to two parameters of other data.

Device Status

dev-status is the primary status word returned from the printer. Table A-9 shows the format of dev-status.

Table A-9 Format of dev-status for 5520 Serial Matrix Printers

Bit	Meaning
.<0:8>	Not defined
.<9:11>	Full status field:
	0: Partial status
	1: Full status
	2: Full status / VFU fault
	3: Reserved for future use
	4: Full status / data parity error
	5: Full status / buffer overflow
	6: Full status / bail open
	7: Full status / auxiliary status available
.<12>	Buffer full
.<13>	Paper out
.<14>	Device power on
.<15>	Device not ready

Parameters

param1 is the auxiliary status word if dev-status.<9:11> is 7. Otherwise, param1 is 0. The format of this word is as follows:

Bit	Meaning
.<0:8>	Not defined
.<9:13>	Auxiliary status:
	0: No errors this field
	1: No shuttle motion
	2: Character generator absent
	3: VFU channel error
	4-31: Reserved for future use
.<14:15>	3

param2 is the file-system error. For information on file-system errors, see Appendix B.

5530 Letter-Quality Printer

Operator messages sent by the 5530 letter-quality printer include device status information that can be retrieved through the last parameter of SETMODE function 37 last-params. The printer operates in full-status mode only. It always returns a full status when status is requested.

last-params[0] contains the primary status. last-params[1] contains the auxiliary status.

Device Status

dev-status is the primary status word returned from the printer. Table A-10 shows the format of dev-status.

Table A-10 Format of dev-status for 5530 Letter-Quality Printers

Bit	Value	Meaning
.<0:8>	0	Undefined
.<9>	1	Reserved
.<10:12>	0	No faults
	1	Printer idle
	2	Paper out
	3	End of ribbon
	4	Data parity error
	5	Buffer overflow
	6	Cover open
	7	Auxiliary status available
.<13>	0	Buffer not full
	1	Buffer full
.<14>	0	OK
	1	Device powered on
.<15>	0	OK
	1	Device not ready

Auxiliary Status

If bits <10:12> of the primary status word are equal to 7, the auxiliary status word has the following format:

Bit	Meaning
.<0:7>	Undefined
.<8:11>	Fault display status—most-significant hexadecimal digit
.<12:15>	Fault display status—least-significant hexadecimal digit

Table A-11 lists the values of the fault display status and their meanings.

Table A-11 Fault Display Status for 5530 Letter-Quality Printers

Operator Display	Auxiliary Status .<8:11>	Auxiliary Status .<12:15>	Problem Description
None	0	0	No faults
E01	0	1	Paper out
E03	0	3	Cover open
E06	0	6	End of ribbon
E07	0	7	Break
E11	1	1	Parity error
E12	1	2	Unprintable character
E22	2	2	Carrier loss
E23	2	3	Buffer overflow
E30	3	0	Printwheel motor fault
E31	3	1	Carriage fault
E32	3	2	Software fault
E34	3	4	Hardware fault

5573 Nonimpact Page Printer

Operator messages sent by the 5573 nonimpact page printer include device status information and up to two parameters of other data.

Device Status

dev-status is the primary status word returned from the printer. Table A-12 shows the format of dev-status.

Table A-12 Format of dev-status for 5573 Nonimpact Page Printer

Bit	Meaning
.<0:8>	Not defined
.<9:11>	Encoded full status field:
	0: Partial status
	1: Full status
	2: Reserved
	3: Reserved
	4: Full status/data parity error
	5: Full status/buffer overflow
	6: Reserved
	7: Auxiliary status available
.<12>	Buffer full
.<13>	Paper out
.<14>	Device power on
.<15>	Device not ready

Parameters

param1 is the auxiliary status word if dev-status.<9:11> is 7. Otherwise, param1 is 0. The format of this word is:

Bit	Meaning
.<0:8>	Not defined
.<9:15>	Set to 03

param2 is the file-system error. For information on file-system errors, see Appendix B.

Data Communications Lines

For data communications lines, dev-status is the status word returned by the controller, in the following format. The meanings of the LAC, LPRM, RIC, and RIST words are also listed for the different controllers.




	NOTE: An asterisk (*) indicates negative true signal.

Asynchronous Controller

When the asynchronous controller is set to 1, dev-status has the following format:

Bit	Meaning
.<4>	Reverse channel sensed
.<5>	Clear to send sensed
.<6>	Carrier detect sensed
.<7>	Data set ready sensed
.<8>	Channel parity error
.<9>	Channel abort
.<10>	Character overrun
.<11>	Device parity error
.<12>	Byte count termination
.<13>	ETX compare
.<14>	Character compare
.<15>	Break

LAC Words

Bits <0:7> of the Load and Address Command (LAC) word contain the command issued to the controller. Table A-13 lists the possible commands.

Table A-13 Load and Address Command (LAC) Words

Code in Octal	Meaning or Command
%000000	Identify generation
%001000	Sense unit active status (UAS)
%001400	Initiate write
%002000	Write Loc 0 (low)
%002400	Write Loc 0 (high)
%003000	Write Loc 1 (low)
%003400	Write Loc 1 (high)
%004400	Initiate Read
%011000	Sense IOC low (Loc 1)
%012000	Write Loc 2 (low)
%012400	Write Loc 2 (high)
%013000	Write Loc 3 (low)
%013400	Write Loc 3 (high)
%021000	Sense extra functions (Loc 2)
%022000	Write Loc 4 (low)
%022400	Write Loc 4 (high)
%023000	Write Loc 5 (low)
%023400	Write Loc 5 (high)
%031000	Sense modem interrupt enable and compare values (MIENCV) (Loc 3)
%032000	Write Loc 6 (low)
%032400	Write Loc 6 (high)
%033000	Write Loc 7 (low)
%033400	Write Loc 7 (high)
%035400	Load MIENCV
%036000	Gimme (extended)
%041000	Sense character compare #1 (Loc 4)
%042000	Write Loc 8 (low)
%042400	Write Loc 8 (high)
%043000	Write Loc 9 (low)
%043400	Write Loc 9 (high)
%046400	Execute internal diagnostics (self-test)
%051000	Sense character compare #2 (Loc 5)
%052000	Write Loc 10 (low)
%052400	Write Loc 10 (high)
%053000	Write Loc 11 (low)
%053400	Write Loc 11 (high)
%055000	Read diagnostic address (extended)
%056000	Load diagnostic address register (low)
%056400	Load diagnostic address register (high)
%060400	LED Control (extended)
%061000	Sense character compare #3 (Loc 6)
%062000	Write Loc 12 (low)
%062400	Write Loc 12 (high)
%063000	Write Loc 13 (low)
%063400	Write Loc 13 (high)
%067000	Write to diagnostic address (extended)
%071000	Sense character compare #4 (Loc 7)
%072000	Write Loc 14 (low)
%072400	Write Loc 14 (high)
%073000	Write Loc 15 (low)
%073400	Write Loc 15 (high)
%111000	Sense Loc 8
%121000	Sense Loc 10
%125400	Load modem control register
%126000	Read microcode PROM
%126400	Load microcode PROM (extended)
%127000	Identify microcode
%131000	Sense Loc 11
%136000	Write RAM stack
%136400	Read RAM stack
%137000	Write configuration
%141000	Sense Loc 12
%143400	Write channel (extended)
%146000	Reset
%146400	Load RAM sense bit
%151400	Write SEEROM (extended)
%152400	Write SEEROM
%153400	Read SEEROM (extended)
%154400	Read SEEROM
%155000	Read channel (extended)
%161000	Sense Loc 14
%166000—%167400	Kill port
%170400	Generate interrupt (extended)
%171000	Sense Loc 15
%171400	Generate interrupt
%173400	Write channel
%175400	Read channel
%176000—%177400	Take ownership

LPRM Data

The interpretation of the bits in the LPRM word depends on the type of EIO indicated in the LAC word. For asynchronous controllers, bits <0:7> contain the LPRM data. Table A-14 lists the interpretation of the bits you should use for the specified EIO.

Table A-14 Load Parameter (LPRM) Data

Bit	Mnemonic	Function
Initiate Write LPRM
.<0:5>	None	Zeros
.<6>	WA	Write active bit.
.<7>	BRK	Break interrupt enable bit.
Initiate Read LPRM
.<0>	PB	Parameter block. If set to 1, bits <1:7> indicate termination conditions.
.<1>	OCR	One-character Read.
.<2>	None	Zero.
.<3>	PAR	Parity.
.<4>	ETX2	Second character after end-of-text (ETX) interrupt enable bit.
.<5>	EXT1	First character after ETX interrupt enable.
.<6>	CC	Character compare bit.
.<7>	BRK	Break bit.
MIENCV LPRM Bits
.<0>	SDDCD IE	SDCD interrupt enable bit.
.<1>	CTS IE	CTS interrupt enable bit.
.<2>	DCD IE	DCD interrupt enable bit
.<3>	DSR IE	DSR interrupt enable bit.
.<4>	SDCD CV	SDCD compare value bit.
.<5>	CTS CV	CTS compare value bit.
.<6>	DCC CV	DCD compare value bit.
.<7>	DSR CV	DSR compare value bit.
Load Modem Control Register LPRM
.<0>	TB	Transmit break bit.
.<1>	SRTS	SRTS circuit selection bit. (1 = ON, 0 = OFF)
.<2>	DTR	DTR circuit selection bit. (1 = ON, 0 = OFF)
.<3>	RTS	RTS circuit selection bit. (1 = ON, 0 = OFF)
.<4:7>	—	Zeros.
Write RAM stack LPRM
.<0:7>	—	Bits <0:7> give half the starting address for the write.
Read RAM Stack LPRM
.<0:7>	—	Half the starting address for the section of the RAM stack to dump.
Write Configuration LPRM
.<0:7>	None	Zeros
LED Control LPRM
.<0:5>	None	Zeros.
.<6>	AB*	BIC red LEDs. (0 = ON, 1 = OFF)
.<7>	LB*	LB red LEDs. (0 = ON, 1 = OFF)
Execute Internal Diagnostics LPRM
0	—	Set to 1.
.<1:7>	—	Test number.
Write/Read SEEROM LPRM
.<0>	AB	BIC's SEEROM is target if 1. LB’s SEEROM is target if 0.
.<1:3>	PAGE	Any value other than 0 or 1 generates a SEEROM address error in RIC high byte.
.<4:7>	START ADDR	Defines the byte on which to start the read or write.

RIC Word

The Read Interrupt Cause (RIC) word can indicate a microcode, modem, or data interrupt. Bits 1 and 2 of the RIC word indicate the type of RIC:

Bit 0	Bit 1	Format
0	0	Microcode RIC word
0	1	Modem RIC word
1	—	Date RIC word

The microcode RIC word returns an error code in bits <2:7>. The meaning for each of these error codes appears in Table A-15.

Table A-15 Microcode RIC Error Codes

Error Code (in hex)	Meaning
0	No error
1	Unsupported command value in LAC word of EIO.
2	Extended unit address in LPRM is greater than 15.
3	LPRM upper byte bits that should be zero are not.
4	Data in LPRM high byte is self-contradictory.
5	Got ABTD while attempting to get configuration block.
6	SEEROM is already being accessed by another unit.
7	Configuration block data is not the right length.
8	Data in configuration block is self-contradictory.
9	Got ABTD while attempting to get read parameter block.
A	State read1 detected a short burst after the burst completed.
B	Read parameter block data is not 4 bytes long (wrong length.)
C	Data in read parameter block is self-contradictory.
D	Both ETX1 and ETX2 are on in Read LPRM or parameter block.
E	Neither WA nor BRK bit is on in Write LPRM.
F	Found scan event at a UART interrupt entry point.
10	Undefined.
11	Got ABTD or channel parity error while getting TX data.
12	Got ABTD while trying to send RX data to channel.
13	No read termination conditions specified in Read LPRM.
14	No read termination conditions specified in Read parameter block.
15	Got burst done event in a state that did not expect one.
16	Jumped through the transmit break state machine with UART interrupt event modified state variable.
17	Found burst event at UART interrupt event entry point.
18	Got ABTD while attempting to send microcode ID block to channel.
19	Got overrun while attempting to send microcode ID block to channel.
1A	Bits <1:7> are not all zero when PB is 1 in a Read LPRM.
1B	Jumped indirect through state jump table that has no state defined for it.
1C	A unit clear has occurred but the IIO (or RIO) pending flag remains set even though the IIO (or RIO) FIFO ready bit is turned off.
1D	Got channel event or reconnect burst (RIO) ISR and RecSts. Done bit is zero.
1E	Read continuous mode flag (BR) is 1, but the IOC byte count in a Read EIO is odd. IOC byte count should be event for read continuous mode.
1F	Undefined.
20	Undefined.
21	TXC UART interrupt event to a state that did not expect one.
22	Got RXD interrupt, but RDCR is 0.
23	No interrupt type in hardware status register in UART interrupt.
24	Got receive timeout exception from UARTs. (Use of timeout is not implemented on 3603 controller.)
25	Interrupt pending not asserted in hardware status register in UART interrupt.
26	Write CCR subroutine timed out.
27	RXChar routine did not return a valid termination bit set.
28 - 29	Undefined.
2A	UART’s interrupt enable register (IER) not equal to RAM image of contents last written to IER as reported in UART interrupt routine.
2B	Got modem interrupt form the UARTs.
2C	Undefined.
2D	Found IIO pending flag set to 1 in IIO FIFO queue routine. Found reconnect burst (RIO) pending flag set to 1 in RIO FIFO queue routine.
2F	Undefined.
30	Got Write EIO with WAS set while transmit break state machine state not equal to transmit break idle (sending break.)
31	Got Read EIO with WOTR bit set while transmit break state machine state not equal to transmit break idle (sending break.)
32 - 35	Undefined.
36	Got TXD event while in state transmit break.
37 - 3F	Undefined.

The modem RIC word indicates a signal change when at least one of the four modem control lines differs from its compare value and its interrupt enable bit is on. The signal changes are indicated in bits <4:7> of the modem RIC word. Their assignments are:

Bit	Meaning
.<4>	Modem SDCD signal change.
.<5>	Modem CTS signal change.
.<6>	Modem DCD signal change.
.<7>	Modem DSR signal change.

The data RIC word reports an event concerning the transfer of data. Bits <1:7> indicate the event that occurred. Their assignments are:

Bit	Mnemonic	Meaning
.<1>	ETS	Transfer ended too soon.
.<2>	CC	Character compare termination.
.<3>	ETX	ETX termination.
.<4>	BRK	Break termination.
.<5>	PAR	Parity error.
.<6>	FE	Framing error.
.<7>	OVR	Overrun error.

RIST Word

The Read Interrupt Status (RIST) word indicates the status of an interrupt. The interpretation of the bits in the RIST word are:

Bit	Meaning
.<0>	Ownership bit. The ownership currently resides with the other port.
.<1>	Interrupt pending bit. The addressed unit has an interrupt pending.
.<2>	Abort bit. The addressed unit was aborted by the channel during a data transfer.
.<3>	Parity error bit. The controller detected a parity error across all 16 bits of an outbound data word during a transfer from the channel.
.<4>	Set to 1.
.<5:7>	Zeros.
.<8:9>	Controller address.
.<13:15>	Zeros.

Byte-Synchronous Controller

When the byte-synchronous controller is set to 1, dev-status has the following format:

Bit	WRITE UNIT Meaning	READ UNIT Meaning
.<0>	Power on	Power on
.<1>	Channel underrun	Device overrun
.<2>	Channel abort	Channel abort
.<3>	Channel parity error	Unused
.<4>	Auto poll terminated	BCC error
.<5>	Data set ready terminated	VRC error
.<6>	Modem loss	Modem loss
.<7>	Byte count terminated	Byte count terminated

If modem loss is detected or if a vertical redundancy check (VRC) error is reported for a write unit, bits <8:15> of dev-status are:

Bit	WRITE UNIT Meaning	READ UNIT Meaning
.<8>	Data set ready	Data set ready
.<9>	Modem loss sensed	Modem loss sensed
.<10>	Data carrier detected	Data carrier detected
.<11>	Clear to send	Clear to send
.<12>	DSR interrupt	DSR interrupt
.<13>	Control carrier enable	Control carrier enable
.<14>	Request to send	Request to send
.<15>	Data terminal ready	Data terminal ready

If no modem loss is detected or no VRC error is reported for a write unit, bits <8:15> of dev-status are:

Bit	WRITE UNIT Meaning	READ UNIT Meaning
.<8>	State count	ETB/ETX sensed
.<9>	State count	SOH/STX sensed
.<10>	State count	State count
.<11>	State count	State count
.<12>	State count	State count
.<13>	State count	State count
.<14>	State count	State count
.<15>	State count	State count

LAC Words

Bits <0:7> of the Load and Address Command (LAC) word contain the command issued to the controller. Table A-16 lists the possible commands.

Table A-16 Load and Address Command (LAC) Words

Code in Octal	Meaning or Command
%000000	Identify generation
%001000	Sense Loc 1
%003400	Initiate Write
%005400	Initiate Read
%006400	Load modem control
%007400	Initialize read/line turnaround (Write RAM Word 0)
%011000	Sense Loc 1
%016000	Stop Autopoll
%017400	Load poll/select address (Write RAM Word 1)
%020000—%020400	Sense Loc 2 (special case)
%026000	Enable memory access
%027400	Write RAM Word 2
%036000—%036400	Unit Clear
%041000	Sense Loc 4
%046000	Load RAM sense
%046400	Execute internal diagnostics (self-test)
%051000	Sense Loc 5
%055000	Read diagnostic address (extended)
%056000	Load diagnostic address register (low)
%056400	Load diagnostic address register (high)
%057400	Write RAM Word 5
%060400	LED Control (extended)
%061000	Sense Loc 6
%062000	Sense Loc 3
%067000	Write to diagnostic address (extended)
%067400	Write RAM Word 6
%071000	Sense Loc 7
%077400	Write RAM Word 7
%101000	Sense Loc 8
%102000	Dump USRT registers
%103000	Load USRT registers
%105400	Unit clear
%111000	Sense Loc 9
%121000	Sense Loc 10
%126000	Read microcode PROM
%126400	Load microcode PROM (extended)
%127000	Identify microcode
%131000	Sense Loc 11
%136000	Write RAM stack
%136400	Read RAM stack
%137000	Write configuration
%141000	Sense Loc 12
%143400	Write channel (extended)
%146000	Reset
%146400	Load RAM sense bit
%151400	Write SEEROM (extended)
%152400	Write SEEROM
%153400	Read SEEROM (extended)
%154400	Read SEEROM
%155000	Read channel (extended)
%161000	Sense Loc 14
%166000—%167400	Kill port
%170400	Generate interrupt (extended)
%171000	Sense Loc 15
%171400	Generate interrupt
%173400	Write channel
%175400	Read channel
%176000—%177400	Take ownership

LPRM Data

The interpretation of the bits in LPRM word depends on the type of EIO indicated in the LAC word. Table A-17 lists the interpretation of the bits you should use for the specified EIOs.

Table A-17 Load Parameter (LPRM) Data

Bit

Mnemonic

Function

Initiate Write LPRM

.<0>

—

Set to 1.

.<1>

XLE

Transfer enable bit.

.<2>

CCI

CCITT enable bit. If set to 1, CCITT CRC calculated. If set to 0, CRC-16 type CRC is used.

.<3>

CRC

If set to 1, controller performs CRC calculation on transmit data selected by CCI. If set to 0, controller calculates 8-bit LRC.

.<4>

APE

Autopoll enable bit.

.<5>

LOE

Leading EOT enable bit.

.<6>

CRS

Clear RTS enable bit.

.<7>

LTE

Line Turnaround bit.

.<8>

TBC

Transmit BCC enable bit.

.<9>

BCE

BCC Calculation enable bit.

.<10:15>

—

Zeros.

Initiate Read LPRM

.<0>

—

Busy bit. Must be set to 1.

.<1>

XLE

Transmit enable bit.

.<2>

CCI

CCITT enable bit. Selects between a CCITT CRC and a 16-bit type CRC.

.<3>

CRC

If set to 1, controller performs CRC calculation on transmit data selected by CCI. If set to 0, controller calculates 8-bit LRC.

.<4>

APE

Autopoll enable bit.

.<5>

—

Zero.

.<6>

CRS

Clear RTS enable bit.

.<7>

RCE

Read Continuous enable bit.

.<8>

RRD

Reread with address compare enable on an EOT or DLE-EOT

.<9>

ACE

Address compare enable bit.

.<10>

BUR

Burroughs protocol enable bit.

.<11:13>

—

Not used.

Initiate Read LPRM (continued)

.<14>

—

BCC Calculate enable/disable bit.

.<15>

—

Not used.

Load Modem Control LPRM

.<0:10>

—

Not used

.<11>

Controlled DCD enable.

.<12>

CDC loss/sense enable

.<13>

CTS

CTS loss/sense enable.

.<14>

DSR

DSR interrupt enable.

.<15>

DTR

DTR enable.

Load Initial SYN Count LPRM

.<0:7>

—

Unused.

.<8:15>

—

SYN count.

Load Poll/Select Address LPRM

.<0:7>

—

Poll address.

.<8:15>

—

Select address.

Initialize Read/Line Turnaround LPRM

.<0>

—

Busy bit. Must be set to 1.

.<1>

XLE

Transmit enable bit.

.<2>

CCI

CCITT enable bit. Selects between a CCITT CRC and a 16-bit type CRC.

.<3>

CRC

If set to 1, controller performs CRC calculation on transmit data selected by CCI. If set to 0, controller calculates 8-bit LRC.

.<4>

APE

Autopoll enable bit.

.<5>

—

Zero.

.<6>

CRS

Clear RTS enable bit.

.<7>

RCE

Read continuous enable bit.

.<8>

RRD

Reread with address compare enable on an EOT or DLE-EOT

.<9>

ACE

Address compare enable bit.

.<10>

BUR

Burroughs protocol enable bit.

.<11:13>

—

Not used.

.<14>

—

BCC calculate immediate.

.<15>

—

Transparent text enable/disable.

Configure Unit LPRM

.<0:7>

—

Zeros.

.<8:9>

CHAR

Specifies the character length. Possible values in this field:

Field Value: 0	Character length: 5 bits
Field Value: 1	Character length: 6 bits
Field Value: 2	Character length: 7 bits
Field Value: 3	Character length: 8 bits

.<10>

PRI

Privilege.

.<11>

TST

Test.

.<12>

BAL

Specifies the electrical interface used. (0 = RS-232, 1 = RS-422.)

.<13:15>

XLAT

Specifies the translation section of the PROM that the controller uses. Possible values in this field:

Field Value 0: ASCII to EBCDIC 
Field Value 1: ASCII to KATAKANA 
Field Value 2 - 3: Invalid 
Field Value 4: EBCDIC to ASCII 
Field Value 5: KATAKANA to ASCII 
Field Value 6 - 7: Invalid

Execute Internal Diagnostics LPRM

None

Set to 1.

.<1:7>

None.

Test number.

Write/Read SEEROM LPRM

.<0>

BICS’s SEEROM is target if 1. LB’s SEEROM is target if 0.

.<1:3>

PAGE

Any value other than 0 or 1 generates a SEEROM address error in RIC high byte.

.<4:7>

START ADDR

Defines the byte on which to start the read or write.

RIC Word

The Read Interrupt Cause (RIC) word can be either a READ Unit RIC word or a WRITE Unit RIC word. The lower byte of the RIC word can contain modem signal information instead of a read state count or a write state count.

Table A-18 lists the interpretation of the bits in the upper byte of the READ Unit RIC word.

Table A-18 READ Unit RIC Word Bit Assignments (Bits <0:7>)

Bit	Mnemonic	Meaning
.<0>	PON	Controller power on
.<1>	DO	Device Overrun bit
.<2>	CA	Channel ABTD bit
.<3>	PA	Parity error
.<4>	BCC	BCC/LRC error
.<5>	VRC	VRC error
.<6>	MI	Modem interrupt bit
.<7>	MY	Byte count termination

If bit .<6> is set to 0, the lower byte of the RIC word contains the read state count. The interpretation of the value in bits <8:15>:

Value (in octal)	Function
%00	Inactive
%16	Unit clear completion
%17	Drop TRS, sense carrier
%20	Uninitialize registers and USART
%21	Sense first SYN character
%22	Sense second SYN character
%23	Read control
%24	Read text
%25	Compare low-byte BCC
%26	Compare high-byte BCC
%27	Wait/channel termination
%30	Compare LRC

If bit .<6> is set to 1, the lower byte of the RIC word contains modem signal information. In this case, the interpretation of the bits in the lower byte is:

Bit	Mnemonic	Meaning
.<8>	DSR	Data set ready signal status
.<9>	—	Modem lost bit. Indicates a modem signal has been lost.
.<10>	DCD	Carrier detect
.<11>	CTS	Clear to send
.<12>	—	DSR interrupt
.<13>	—	Control Carrier Enable
.<14>	RTS	Request to send
.<15	DTR	Data terminal ready

If bit .<6> is set to 0, the lower byte of the RIC word contains the following information:

Bit	Mnemonic	Meaning
.<8>	ETS	The unit has received an ETB/ETX character
.<9>	STS	The unit has received an SOH/STX character.
.<10:15>	—	Read state count

The interpretation of the bits in the upper byte of the Write Unit RIC word follows:

Bit	Mnemonic	Meaning
.<0>	PON	Power-on bit
.<1>	DU	Device underrun bit
.<2>	CA	ABTD bit
.<3>	PA	Parity error
.<4>	BCC	Autopoll bit
.<5>	VRC	DSR bit
.<6>	MI	Modem interrupt bit
.<7>	BY	Byte count termination

If bit .<6> is set to 0, the lower byte of the RIC word contains the write state count. In this case, the interpretation of the value in bits <8:15> are as follows:

Value (in octal)	Function
%00	Inactive
%01	Initialize registers
%02	Sense for no carrier
%03	Set request to send
%04	Sense clear to send
%05	Transmit initial syncs
%06	Transmit data
%07	Transmit low byte of BCC
%10	Transmit high byte of BCC
%11	Transmit pad
%12	Clear TRS — Line turnaround or terminate
%13	Transmit leading EOT
%14	Transmit LRC
%15	Modem loss cleanup
%16	Unit clear completion

If bit .<6> is set to 1, the lower byte of the RIC word contains modem signal information. In this case, the interpretation of the bits in the lower byte is as follows:

Bit	Mnemonic	Meaning
.<8>	DSR	Data set ready signal status
.<9>	—	Modem lost bit. Indicates a modem signal has been lost.
.<10>	DCD	Carrier detect
.<11>	CTS	Clear to send
.<12>	—	DSR interrupt
.<13>	—	Control carrier enable
.<14>	RTS	Request to send
.<15>	DTR	Data terminal ready

RIST Word

The Read Interrupt Status (RIST) word follows the RIC word. The interpretation of the bits in the RIST word:

Bit	Meaning
.<0>	Ownership bit
.<1>	Interrupt pending bit
.<2>	Abort data bit
.<3>	Parity error bit
.<4:7>	Zeros
.<5:7>	Zeros
.<8:12>	Controller number
.<13:15>	Logical unit address

Bit-Synchronous Controller

When the bit-synchronous controller is set to 1, dev-status has the following format:

Bit	WRITE UNIT Meaning	READ UNIT Meaning
.<0>	Power on	0
.<1>	Channel underrun	Channel underrun
.<2>	Channel abort	Channel abort
.<3>	Channel parity error	0
.<4>	Modem loss	Modem loss
.<5>	0	Read-byte overrun
.<6>	Transmit underrun	Receiver overrun
.<7>	No encryption	No encryption

Bit	AUTOPOLL Meaning	MODEM CONTROL Meaning
.<0>	0	0
.<1>	Channel underrun	0
.<2>	Channel abort	0
.<3>	Channel parity error	0
.<4>	Modem loss	0
.<5>	Autopoll terminated	0
.<6>	Transmit underrun	DSR, data set ready interrupt
.<7>	0	0

If modem loss is detected, bits <8:15> of dev-status show modem status:

Bit	Meaning
.<8>	DSR*, data set ready (inverted)
.<9>	CD*, carrier detect (inverted)
.<10>	CTS*, clear to send (inverted)
.<11>	Transmit overrun
.<12>	RS-422
.<13>	Maintenance mode
.<14>	RTS, request to send
.<15>	DTR, data terminal ready

If no modem loss is detected, bits <8:15> of dev-status are:

Bit	WRITE UNIT Meaning	READ UNIT Meaning
.<8>	Ending state count	Receiver error
.<9>	Ending state count	ABC.<0>, assembled bit count
.<10>	Ending state count	ABC.<1>
.<11>	Ending state count	ABC.<2>
.<12>	Ending state count	Receiver overrun error
.<13>	Ending state count	Abort/go-ahead char detected
.<14>	Ending state count	Receiver end-of-message
.<15>	Ending state count	0
Bit	AUTOPOLL Meaning	MODEM CONTROL Meaning
.<8>	0	DSR*, data set ready (inverted)
.<9>	0	CD*, carrier detect (inverted)
.<10>	0	CTS*, clear to send (inverted)
.<11>	0	Transmit overrun
.<12>	0	RS-422
.<13>	0	Maintenance mode
.<14>	End of poll list	RTS, request to send
.<15>	End of poll	DTR, data terminal ready

LAC Words

Bits <0:7> of the Load Address and Command (LAC) word contain the command issued to the controller. Table A-19 lists the possible commands.

Table A-19 Load Address and Command (LAC) Words

Code in Octal	Meaning or Command
%000000	Identify gen/sense, privileged
%000001	Identify gen/sense
%000004	I/O Write, privileged
%000005	I/O Write
%000012	Read NVRAM, privileged (6204 only)
%000013	Read NVRAM (6204 only)
%000015	Unit clear, privileged
%000006	I/O Write when idle, privileged
%000007	I/O Write when idle
%000016	Modem control, privileged
%000017	Modem control
%000020	Abort Write, privileged
%000021	Abort Write
%000024	Start Autopoll, privileged
%000025	Start Autopoll
%000026	Write NVRAM, privileged (6204 only)
%000027	Write NVRAM (6204)
%000030	Initialize Read, privileged
%000031	Initialize Read
%000034	Test control, privileged
%000035	Test control
%000036	Stop Autopoll, privileged
%000037	Stop Autopoll
%000050	Read, privileged
%000051	Read
%000056	Load translate offset, privileged
%000057	Load translate offset
%000076	Load translate length, privileged
%000077	Load translate length
%000116	Load configuration, privileged
%000117	Load configuration
%000136	Load DG register, privileged
%000137	Load DG register
%000140	LED control, privileged (3604 only)
%000141	LED control (3604 only)
%000156	DG Write, privileged
%000157	DG Write
%000176	ENBMRQ, privileged
%000177	ENBMRQ
%000216	Load AB0, privileged
%000217	Load AB0
%000236	Load AB1, privileged
%000237	Load AB1
%000254	DG Read, privileged
%000255	DG Read
%000256	Load AB2, privileged
%000257	Load AB2
%000275	Load AB3, privileged
%000277	Load AB3
%000316	Load A and C, privileged
%000317	Load A and C
%000324	Write SEEROM, privileged (3604 only)
%000325	Write SEEROM (3604 only)
%000324	Read SEEROM, privileged (3604 only)
%000325	Read SEEROM (3604 only)
%000336	Load TXCL, privileged
%000337	Load TXCL
%000354—%000357	Port disable
%000370	Read channel, privileged
%000371	Read channel
%000372	Identify device, privileged (6204 only)
%000373	Identify device (6204 only)
%000374	Take ownership
%000375	Take ownership
%000362	Generate interrupt, privileged
%000363	Generate interrupt
%000366	Write channel, privileged
%000367	Write channel
%000376	Take ownership
%000377	Take ownership

LPRM Data

A parameter word can be associated with each address/command word. Table A-20 lists the interpretation of the bits in parameter words for the specified address/command word.

Table A-20 Load Parameter (LPRM) Data

Bit	Mnemonic	Function
Write
.<0>	—	Set to 1
.<1>	TRE	Translate enable
.<2>	—	Set to 0
.<3>	LTE	Line turnaround enable
.<4>	DRTS	Drop request to send after write
.<5>	LXF	Leave line transmitting flags
.<6>	WCTS	Wait for CTS to drop after dropping RTS
.<7>	TGA	Transmit go ahead
.<8:10>	LCL	Last character bit length
.<11:15>	—	Zeros
Write When Idle
.<0>	—	Set to 1
.<1>	TRE	Translate enable
.<2>	—	Set to 0
.<3>	LTE	Line turnaround enable
.<4>	DRTS	Drop request to send after write
.<5>	LXF	Leave line transmitting flags
.<6>	WCTS	Wait for CTS to drop after dropping RTS
.<7>	TGA	Transmit go ahead
.<8:10>	LCL	Last character bit length
.<11:15>	—	Zeros
Abort Write
.<0>	—	Set to 1
.<1:3>	—	Zeros
.<4>	DTRS	Drop request to send
.<5>	LXF	Leave line transmit flags
.<6:14>	—	Zeros
.<15>	Abort	Set to 1
Read
.<0>	—	Set to 1
.<1>	TRE	Translate enable
.<2>	—	Set to 0
.<3>	CR	Continuous read
.<4>	—	Set to 0
.<5>	APE	All parties enable
.<6>	AAE	All addresses enable
.<7:15>	—	Zeros
Initialize Read
.<0>	—	Set to 1
.<1>	TRE	Translate enable
.<2>	—	Set to zero
.<3>	CR	Continuous read
.<4>	APE	All addresses enable
.<5>	AAE	All parties enable
.<7:15>	—	Zeros
Start Autopoll
.<0>	—	Set to 1
.<1:3>	—	Zeros
.<4>	DRTS	Drop request to send after write
.<5>	LXF	Leave line transmitting flags
.<6:15>	—	Zeros
Modem Control
.<0>	DSRI	Data set ready interrupt enable
.<1>	CLE	Carrier loss sense enable
.<2>	CTLE	CTS loss sense enable
.<3>	CCE	Controlled carrier enable
.<4>	AF	Abort fill
.<5>	TX0	Transmit zeros on data line
.<6>	TX1	Transmit ones on data line
.<7>	ECM	Generate improper checksum
.<8>	—	Set to zero
.<9>	LLE	Local loopback enable (RS-449 only)
.<10>	RLE	Remote loopback enable (RS-449 only)
.<11>	—	Set to zero
.<12>	XOUT	Not used
.<13>	MM	Maintenance mode enable
.<14>	RTS	RS-232-C TRS enable, RS-449 RS enable
.<15>	DTR	RS-232-C DTR enable, RS-449 TR enable
Load Translation Offset
.<5:15>	—	Translation offset
Load Translation Length
.<5:15>	—	Translation length
Load A and C Field Lengths
.<0:7>	—	A length
.<8:15>	—	C length
Load Primary and Secondary Address
.<0:7>	—	Primary address
.<8:15>	—	Secondary address
Load Character Length
.<0>	—	Set to 0
.<1:7>		A + C length
.<8:10>	TXCL	Transmit character length
.<11:12>	—	Zeros
.<12:15>	RXCL	Receive character length
Load Configuration
.<6:7>	—	Configuration code
Enable Memory Access
.<0:15>	—	Zeros
Load Diagnostic RAM Address
.<6:14>	—	RAM address
.<15>	SUL	Sense upper or lower byte (0 = lower, 1 = upper)
Diagnostic Write RAM
.<0:15>	—	Data pattern
Identify Generation
.<0:15>	—	All ones. Command ignored if .<15> is 0
Generate Interrupt
.<0:15>	—	Data to be returned in RIC
Read Channel
.<0:15>	—	Value to be returned in memory
Read SEEROM
.<0:3>	—	Zeros
.<4>	AB	BIC
.<5:7>	PAGE	Starting byte
.<8:15>	—	Address of starting byte
Write SEEROM
.<0.3>	—	Zeros
.<4>	AB	BIC
.<5:7>	PAGE	Starting byte
.<8:15>	—	Address of starting byte
LED Control
<0:13>	—	Zeros
.<14>	AB	LEDs on BIC, (0 = ON, 1 = OFF)
.<15>	LB	LEDs on LB, (0 = ON, 1 = OFF)

RIC Word

A Read Interrupt Cause (RIC) word can be associated with a LAC and LPRM. Table A-21 lists the interpretation for the bits in these RIC words.

Table A-21 RIC Word Bit Assignments

Bit	Mnemonic	Function
Write
.<0>	PON	Power on (unit 0 only)
.<1>	CURUN	Channel underrun
.<2>	ABORT	Channel abort
.<3>	PAR	Channel parity
.<4>	MODEM	Modem signal error
.<5>	—	Set to 0
.<6>	XURUN	Transmit underrun
.<8:15>	—	End state of modem status
Read
.<0>	—	Set to 0
.<1>	COVRN	Channel overrun
.<2>	ABORT	Channel abort
.<3>	—	Set to 0
.<4>	MODEM	Modem signal error
.<5>	RBYTE	Rbyte overrun, the number of characters read exceeds the count in the IOC
.<6>	RECVR	Receiver overrun (same as RORER)
.<7>	—	Set to 0
.<8>	RERR	Receiver error
.<9:11>	ABC	Assembled bit count
.<12>	RORER	Receiver overrun (same as RECVR)
.<13>	RABGA	Received an abort
.<14>	REOM	Receiver end-of-message
.<15>	—	Set to 0
Start Autopoll
.<0>	—	Set to 0
.<1>	CURUN	Channel underrun
.<2>	ABORT	Channel abort
.<3>	PAR	Channel parity error
.<4>	MODEM	Modem loss
.<5>	APOLL	Apoll termination
.<6>	XURUN	Transmit underrun
.<7:13>	—	Set to 0
.<14>	EOPL	EOP L, valid if APOL set
.<15>	END	END POLL, valid if APOL set
Modem Control
.<0:5>	—	Set to 0
.<6>	DSRI	RS-232 C Data set ready interrupt RS-449 Data mode interrupt
.<7>	—	Set to 0
.<8>	DSR*	RS-232-C Data set ready* RS-449 Data mode*
.<9>	CD*	RS-232-C Carrier detect* RS-449 Receiver ready*
.<10>	CTS*	RS-232-C Clear to send* RS-449 Clear to send*
.<11>	XURUN	Transmitter underrun
.<12>	XOUT	Not used
.<13>	MM	Maintenance mode
.<14>	RTS	RS-232-C Request to send RS-449 Request to send
.<15>	DTR	RS-232-C Data terminal ready RS-449 Terminal ready
Test Control
.<0:6>	—	Zeros
.<7>	RS-449	See following table
.<8>	DSR*	RS-232-C Data set ready* RS-449 Data mode*
.<9>	CD*	RS-232-C Carrier detect* RS-449 Receiver ready*
.<10>	CTS*	RS-232-C Clear to send* RS-449 Clear to send*
.<11>	X21	See following table
.<12>	TM*	Test mode (RS-449 only)
.<13>	TX0*	USRT transmitter not transmitting zeros on TXD line
.<14>	LL	RS-449 Local loopback
.<15>	RL	RS-449 Remote loopback

For the Test Control command, the interpretation of the bits for the RS-449 and X.21 fields in the RIC is:

Interface	RS-449	X.21
RS-232-C	0	0
RS-449	1	0
X.21	0	1
V.35	1	1

For the Read SEEROM command, the interpretation of the RIC values is:

RIC	Reason
%0000	Normal termination
%0360	SEEROM address error
%0361	SEEROM grant timeout (>3 sec)
%0362	SEEROM handshake failure
%0363	EIO not supported by UNIT 0

Multifunction Controller

For the multifunction controller, the dev-status word can be interpreted as two bytes whose values identify the cause of the controller interrupt. See Table A-22.

Table A-22 Format of dev-status for Multifunction Controller

Bits <0:7>	Bits <8:15>	Meaning
0	0	No error.
1		Error in data transfer to or from HP system:
	3	Transfer aborted by channel
	4	Data buffer DMA error
	5	Peripheral port chip (PPC) error
	6	Read parity error
	7	T-bus sequence error
	8	Port transfer error
	9	Data overrun
	10	Data underrun
2		Controller ownership error:
	All values	Port number of owning port
3		Controller in dead state (has not received RESETUNIT EIO from HP system).
4		Invalid EIO instruction sent to controller:
	All values	Value of EIO control field
5		Hard (unrecoverable) error (This code should never appear in this event message.)
6		Change in interface to modem—value in bits <8:15> is sum of the values representing all of the following conditions that apply:
	1	Data terminal ready
	2	Request to send
	4	Clear to send
	8	Carrier detect
	16	Data set ready
7		Controller error statistics are being sent to I/O process (This code should never appear in this error message.)
8		Incoming frame too large.
9		No controller internal buffer available:
	1	No buffer for port task (to transmit data to or receive data from HP system)
	2	No buffer for driver task (to receive data from line)
10		HP system attempted another write to controller before the first write was completed.

NonStop VLX and NonStop Cyclone $OSP (LDEV 3)

For the NonStop VLX and NonStop Cyclone $OSP (LDEV3), %dev-status indicates status information, as listed in Table A-23. There can also be up to three parameters, as described in the table.

Table A-23 dev-status Values for NonStop VLX and NonStop Cyclone $OSP (LDEV 3)

%`dev-status`	Meaning
%01	WSMT was started by the interrupt handler when none was queued by $OSP.
%02	A timeout was reported on this subdevice when none was expected.
	%`param1` = subdevice
%03	A faulty internal state was reported for the subdevice.
	%`param1` = subdevice
	%`param2` = state
	%`param3` = event
%04	A bad event for this state occurred.
	%`param1` = subdevice
	%`param2` = state
	%`param3` = event
%05	A file error occurred on a download operation.
	%`param1` = 1 (position), 2 (read)
	%`param2` = file number
	%`param3` = file error
%06	The address in the message buffer is incorrect.
	%`param1` = send address
	%`param2` = receive address
	%`param3` = count
%07	The count in the message buffer is incorrect.
	%`param1` = send address
	%`param2` = message length
	%`param3` = count
%10	The receipt flag is on with an incorrect count or incorrect flags.
	%`param1` = flag word
	%`param2` = send address
	%`param3` = receive address
%11	The message tag received is not current.
	%`param1` = flag word
	%`param2` = send address
	%`param3` = receive address
%12	An undefined command code was received.
	%`param1` = send address
	%`param2` = receive address
	%`param3` = command code
%13	RMI reports an error (NAK) on a terminal request.
	%`param1` = subdevice
	%`param2` = FE
%14	A pool allocation failure occurred
	%`param1` = subdevice
	%`param2` = bytes
	%`param3` = 0 (response buffer), 1 (request buffer)
%15	The file-system request was out of range.
	%`param1` = subdevice
	%`param2` = request number
	%`param3` = 0 (checkpoint), 1 (setmode), 2 (getmode),
	3 (new request), 4 (active request)
%16	An incorrect response to I-am-primary message to RMI was received.
	%`param1` = 0 (incorrect message) = 1 (system-load terminal address incorrect)
%17	Inconsistent state for poll.
	%`param1` = subdevice state
	%`param2` = event
%20	Process initialization failed.
	%`param1` = 1 (open pool define failure) = 2 (I/O-segment allocation failure) = 3 (I/O-segment use segment failure) = 4 (I/O-segment definepool failure) = 5 (RMI subdevice pool-allocation failure) = 6 (input table pool-allocation failure)
%21	A bad request was made.
	%`param1` = request
%22	The operation was not retried because the request buffer was overwritten.
	%`param1` = flags
	%`param2` = send address
	%`param3` = receive address
%24	XMIOP cannot be started.
	%`param1` = file system or process-creation error number
	%`param2` = 0 (Object file for XMIOP is not present.) = 1 (XMIOP process could not be created)
%25	XMIOP cannot be started.
	%`param1` = file system error number
	%`param2` = -2 (communication failure) = -3 (I/O operation failure) = -5 (startup message WRITEREAD error) = -6 (startup message timeout error) = -7 (ASSIGN message WRITEREAD error) = -8 (ASSIGN message timeout error) = -9 (PARAM message WRITEREAD error) = -10 (PARAM message timeout error)