RT Resident POST
When power is first applied, initial self tests
are performed by built it ROM routines and special processor on the system
planar board. These self tests should complete with in 1-2 minutes.
The tests labeled 'fatal' indicate that if this code remains for more than
five minutes, indicates that component has failed.
Numbers display on the two-digit display to track the
progress of the POST programs. Some tests may run so quickly that the numbers
may not be visible.
Note: I have seen tests 14,15,16
and 17 last for up to three to four minutes, depending on the number
of hard disks and/or floppy drives connected to the installed adapters.
The following chart is for "steady" numbers only. Flashing (about
one second) numbers are for software failures. See page 2-19 for flashing
numbers during the diagnostic checkouts.
When u is shown in the chart, it is displayed in the upper
half of the two-digit display.
IBM RT PC 6151 System Unit Hardware Maintenance
and Service, pgs 2-6 thru 2-8.
|Values during IPL
||Displays for 1 sec (lamp test). If steady, the 32-bit processor has
stopped. reserved - POR or processor check
|Initialization of Mono/Printer adapter failed Initialization
failed - Mono/Printer adapter and APC
|ROS CRC did not compare -
- Fatal Advanced Processor card-
- Fatal Enhanced Advanced Processor and
- Fatal memory Mgmt card
||Tests for correct communications between 32-bit processor and the system
board. Soft IPL check failed - Fatal
|Memory error or no memory -
- Fatal Advanced Processorcard and first 128K of memory. - - Fatal
Enhanced Advanced Processor
- Fatal Memory Mgmt card.
|Processor card logic error -
- Fatal APC logic (AdvancedProcessor Card).
- Fatal Enhanced Advanced Processor
- Fatal Memory Mgmt card Logic.
|Processor or memory error condition -
- Fatal APC logic and system memory.
- Fatal Memory expansion option / Enh Adv Processor
- Fatal Memory managment card.
||IOCC test resident POST - Fatal
|Bad processor card in IOCC test -
- Fatal IOCC testfor APC.
- Fatal Enhanced Advanced processor
- Fatal Memory managment card.
||Keyboard adapter resident POST - Fatal
||System timer resident POST - Fatal
||Interrupt controller POST - Fatal
||DMA arbiter resident POST - Fatal
||Serial port resident POST
||Fixed disk resident POST adapter 1 test
||Fixed disk resident POST adapter 2 test
||Diskette resident POST adapter 1 test
||Diskette resident POST adapter 2 test
||Tests Speaker on keyboard
||Attemting Manufacturing IPL
||NVRAM CRC check
||Attempting to IPL from devices stored in battery- powered memory. No
boot record found (NVRAM selected devices)
||Attempting to IPL from default devices stored in ROM on processor board.
No boot record found (ROM selected devices)
||No IPL devices in battery-powered memory or the ROM default list could
be identified. Disk or diskette adapter slot or address
||Error occured during IPL. System must be powered off to clear this
error. User error - invalid RamSpecReg - Fatal
||Attempting soft IPL
||Bootable code exceeds available storage - Fatal
||Unexpected return from loaded code - Fatal
||IPL process passed control to loaded code.
||Individual adapter or device tests
||Unexpected machine or program check - Fatal.
||Memory card 1 resident POST error condition.
||Memory card 2 resident POST error condition.
||Memory card 1 and 2 resident POST error condition.
||Testing stopped Keylock in Locked position.