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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.
(MW)
Notes:
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.
ROS
LED
|
Values during IPL |
| 88 |
Displays for 1 sec (lamp test). If steady, the 32-bit processor has
stopped. reserved - POR or processor check |
00
0c |
Initialization of Mono/Printer adapter failed Initialization
failed - Mono/Printer adapter and APC |
01
1c
1u |
ROS CRC did not compare -
- Fatal Advanced Processor card-
- Fatal Enhanced Advanced Processor and
- Fatal memory Mgmt card |
| 02 |
Tests for correct communications between 32-bit processor and the system
board. Soft IPL check failed - Fatal |
03
3c
3u |
Memory error or no memory -
- Fatal Advanced Processorcard and first 128K of memory. - - Fatal
Enhanced Advanced Processor
- Fatal Memory Mgmt card. |
04
4c
4u |
Processor card logic error -
- Fatal APC logic (AdvancedProcessor Card).
- Fatal Enhanced Advanced Processor
- Fatal Memory Mgmt card Logic. |
05
5c
5u |
Processor or memory error condition -
- Fatal APC logic and system memory.
- Fatal Memory expansion option / Enh Adv Processor
- Fatal Memory managment card. |
| 07 |
IOCC test resident POST - Fatal |
08
8c
8u |
Bad processor card in IOCC test -
- Fatal IOCC testfor APC.
- Fatal Enhanced Advanced processor
- Fatal Memory managment card. |
| 09 |
Keyboard adapter resident POST - Fatal |
| 10 |
System timer resident POST - Fatal |
| 11 |
Interrupt controller POST - Fatal |
| 12 |
DMA arbiter resident POST - Fatal |
| 13 |
Serial port resident POST |
| 14 |
Fixed disk resident POST adapter 1 test |
| 15 |
Fixed disk resident POST adapter 2 test |
| 16 |
Diskette resident POST adapter 1 test |
| 17 |
Diskette resident POST adapter 2 test |
| Beep |
Tests Speaker on keyboard |
| 18 |
Extension ROS |
| 19 |
Attemting Manufacturing IPL |
| 20 |
NVRAM CRC check |
| 21 |
Attempting to IPL from devices stored in battery- powered memory. No
boot record found (NVRAM selected devices) |
| 22 |
Attempting to IPL from default devices stored in ROM on processor board.
No boot record found (ROM selected devices) |
| 23 |
No IPL devices in battery-powered memory or the ROM default list could
be identified. Disk or diskette adapter slot or address |
| 25 |
Error occured during IPL. System must be powered off to clear this
error. User error - invalid RamSpecReg - Fatal |
| 26 |
Attempting soft IPL |
| 27 |
Bootable code exceeds available storage - Fatal |
| 28 |
Unexpected return from loaded code - Fatal |
| 29 |
IPL process passed control to loaded code. |
| 30-uu |
Individual adapter or device tests |
| 89 |
Unexpected machine or program check - Fatal. |
| 96 |
Memory card 1 resident POST error condition. |
| 97 |
Memory card 2 resident POST error condition. |
| 98 |
Memory card 1 and 2 resident POST error condition. |
| 99 |
Testing stopped Keylock in Locked position. |
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