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PDP-10 Archives
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BB-H311B-RM
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swskit-documentation/rsx-stop-codes.mem
There are 6 other files named rsx-stop-codes.mem in the archive. Click here to see a list.
RSX-20F STOP CODES
The following is a list of possible RSX-20F stop codes. Associated
with each is the name of the module that issued the stop code, a short
explanation of the error, and a possible cause of the error.
Code Module Meaning
BF1 QPRDTE BUFFER FAILURE 1
Attempt to obtain buffer space for the TO-11
protocol header failed.
Possible Cause:
Buffer pool space has become exhausted or highly
fragmented. R1 contains the node (buffer) size
requested. .FREPL points to the list of free
nodes. .FREPL+2 contains the number of free bytes
in the pool. Nodes are linked together in the
forward direction through the first word of the
node. The second word of each node contains the
node size.
BO2 QPRDTE BUFFER OVERFLOW 2
The PDP-11 was not able to obtain the buffer space
required to receive an indirect data transfer from
the KL.
Possible Cause:
Same as BF1 above.
B01 TTYDRR BUFFER OVERFLOW 1
The PDP-11 was not able to obtain the buffer space
necessary to transmit TTY characters to the KL
during protocol pause.
Possible Cause:
Same as BF1 above.
B03 SCOMM BUFFER OVERFLOW 3
The PDP-11 was not able to obtain the buffer space
necessary for data it wanted to send to the KL.
Possible Cause:
Same as BF1 above.
RSX-20F STOP CODES Page 2
CBR PF CROBAR ERROR
DTE-20 power has not returned after a power-fail
restart. RSX-20F allows it 30 seconds to
reappear.
Possible Cause:
Malfunctioning hardware in the KL.
DTB QPRDTE TO-11 DTE TRANSFER FAILURE
A To-11-done interrupt has occurred but the To-11
address in the DTE TO11AD register (register 22)
did not have the expected value. Since TO11AD is
incremented for each byte transferred, it should
point to the first word following the buffer into
which the To-11 data was written.
Possible Cause:
The PDP-11 received the wrong byte count or, more
likely, the DTE has a hardware malfunction.
TO11BC contains the negative count of data that
was actually transferred. TO11AS contains address
of data node. R1 contains expected termination
address and CR$DTB-2 contains the actual
termination address for transfer.
DTD COMTRP UNIBUS TIMEOUT
Reference to the DTE-20 caused a UNIBUS timeout.
Possible Cause:
Malfunction of the hardware in the KL.
DTF QPRDTE TO-10 DTE TRANSFER FAILURE
A To-10-done interrupt has occurred but the To-10
address in the DTE TO10AD register (register 20)
did not have the expected value. Since TO10AD
gets incremented for each byte transferred, it
should point to the first word following the
packet which was sent to the 10.
Possible Cause:
The PDP-11 gave the KL the wrong byte count or,
more likely, the DTE has a hardware malfunction.
TO10SZ contains the size of the transfer and
TO10AS the start address. The expected
termination address is in R4.
RSX-20F STOP CODES Page 3
ETE QPRDTE TO-11 TRANSFER ERROR
A DTE interrupt occurred with the TO11ER bit set
in the DTE status register (register 34).
Possible Cause:
Hardware malfunction along the data path between
the KL and PDP-11 (M-box, E-box, E-bus, DTE-20,
through to 11-memory).
FTA LC FILES-11 TASK ABORTED
A task occupying F11TPD partition has aborted and
the task termination notification task (TKTN)
cannot be started since it too runs in the F11TPD
partition.
Possible Cause:
.TKTN itself aborted. R5 and .CRTSK point to the
active task list (ATL) node of the aborted task.
IAS SCH UNKNOWN SIGNIFICANT EVENT
An unused bit in .SERFG has been set.
Possible Cause:
PDP-11 hardware malfunction or corrupted software
in PDP-11. .SERFG has the bit set.
ILF QPRDTE ILLEGAL PROTOCOL FUNCTION
The function code in a To-11 protocol header
specified a function which is outside the legal
range or which is currently unimplemented.
Possible Cause:
KL software is corrupted or hardware malfunction
along data path between KL and PDP-11. R1
contains the function code times two. R4 contains
the address of the protocol header.
ILQ QPRDTE ILLEGAL QUEUE COUNT
The KL and the PDP-11 disagree on the number of
direct transfers that have thus far taken place
from the KL to the PDP-11.
Possible Cause:
The PDP-11 is missing TO-11 doorbell interrupts or
either the KL or the PDP-11 software is corrupted.
RSX-20F STOP CODES Page 4
STATI+0 to STATI+2 contain the KL's To-11 status
word as read by RSX-20F at the last examine.
STATI+4 is the count as the KL expects it and
TO10QC is the count as the PDP-11 expects it.
LRF SCH LOAD REQUEST FAILURE
An attempt to load a nonresident monitor routine
into the F11TPD partition failed.
Possible Cause:
The FILES-11 system is incomplete or damaged.
MPE LC MEMORY PARITY ERROR
A memory parity error has occurred in the PDP-11
(trap to location 114). The memory status
registers are stored starting at location PARSAVE.
See the PDP-11 Processor Handbook for details.
PT1 QPRDTE PROTOCOL BROKEN
An illegal protocol device number was specified in
To-11 request. It was found to be greater than
the maximum allowed device number .DQPSZ
(currently 10).
Possible Cause:
KL software is corrupted or hardware malfunction
along the data path between the KL and PDP-11.
The device number from the protocol header is in
TO11DV.
PT2 QPRDTE PROTOCOL ERROR 2
An illegal protocol function was specified in a
To-11 request. The function was found to be
greater than the allowed maximum BC.FNM (currently
34).
Possible Cause:
Same as PT1 above. The function code from the
protocol header is in TO11FN.
PT3 QPRDTE PROTOCOL ERROR 3
The PDP-11 has received a doorbell interrupt from
the KL. The indirect bit in the KL's To-11 status
word indicates that an indirect transfer is to be
initiated. The function code, however, sent in
the last protocol header, does not indicate that
an indirect request is in progress (the most
RSX-20F STOP CODES Page 5
significant bit of the function code was not set).
Possible Cause:
Same as PT1 above. TO11FN contains the function
code and STATI contains the To-11 protocol status
word.
PT4 QPRDTE PROTOCOL ERROR 4
The KL wants to send a packet to the PDP-11 and
the packet size is greater than the maximum
allowed size of 100.
Possible Cause:
Same as PT1 above. The size is in EQSZ.
RED RED REDIRECT ERROR
A fatal error has occurred during an MCR REDIRECT
command. The file control service is corrupted.
Call your software support specialist.
RES LC RESERVED INSTRUCTION TRAP
This is the PDP-11 trap to location 10. An
attempt was made to execute an illegal or reserved
instruction. See the PDP-11 Processor Handbook
for further details.
Possible Cause:
PDP-11 software is corrupted or there is a PDP-11
hardware malfunction.
SAI TTYDRR SEND-ALL INTERRUPT
The send-all count went negative at output
interrupt level.
Possible Cause:
A race condition in the software or a hardware
malfunction.
SAQ OPRDTE SEND-ALL QUEUE
The send-all count went negative during the
queueing of the send-all message.
Possible Cause:
Corrupted PDP-11 software.
RSX-20F STOP CODES Page 6
TBT LC T-BIT TRAP
This is the PDP-11 trap to location 14. It occurs
when the BPT instruction (not used by RSX-20F) is
executed or when the T-bit is set. See the PDP-11
Processor Handbook for further details.
Possible Cause:
Corrupted PDP-11 software or PDP-11 hardware
malfunction.
TET QPRDTE TO-10-TRANSFER ERROR
A DTE interrupt has occurred with either TO10ER
(To-10 error) or MPE11 (PDP-11 parity error) bit
set in the DTE-20 status register ( register 34).
Possible Cause:
DTE hardware error, PDP-11 memory parity error, or
hardware malfunction along the data path between
the PDP-11 and KL.
T04 LC TRAP AT LOCATION 4
The PDP-11 traps to location 4 when making a word
reference to an odd address or at the occurrence
of a bus timeout. See the PDP-11 Processor
Handbook for further details.
Possible Cause:
PDP-11 software is corrupted, or a PDP-11
peripheral device is malfunctioning or has gone
away.
UIE QPRDTE UNIMPLEMENTED PROTOCOL FUNCTION
The KL uses bits 0-2 of its To-11 status word in
the communications region to inform the front end
of any disaster occurring in the KL. These bits
are read by the front end on receipt of a To-11
doorbell. The currently implemented functions are
KL-RELOAD REQUEST and KL POWER FAIL. Any other
bits that are set cause this halt.
Possible Cause:
Corrupted KL software, KL hardware malfunction or
any hardware malfunction along data path between
KL and PDP-11.