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.