Troubleshooting 2-3
COMPAQ CONFIDENTIAL - NEED TO KNOW REQUIRED
Writer: David Calvert Saved by: David Calvert Saved date: 03/29/00 7:07 AM
Part Number: 177845-001 File name: CH02.doc
Table 2-1 continued
Code Description
12h Signal power on reset on COMS.
13h Initialize the chipset (DRAM).
14h Search for ISA bus VGA adapter.
15h Reset counter/timer 1, excite the RAM.
16h User register config through CMOS.
18h Dispatch to 1st 64K RAM test.
19h Checksum the ROM.
1Ah Reset PIC’s (8259s).
1Bh Initialize video adapter(s)
1Ch Initialize video (6845 regs).
1Dh Initialize color adapter.
1Eh Initialize monochrome adapter
1Fh Test 8237A page registers.
2Oh Perform keyboard self-test.
21h Test and initialize keyboard controller.
22h Check if CMOS RAM valid.
23h Test battery fail & CMOS X-SUM.
24h Test DMA controllers.
25h Initialize 8237 controller.
26h Initialize interrupt vectors table.
27h RAM quick sizing.
28h Protected mode entered safely.
29h RAM test completed.
2Ah Protected mode exit successful.
2Bh Setup shadow.
2Ch Prepare to initialize video.
2Dh Search for monochrome adapter.
2Eh Search for color adapter, VGA initialize
continued
To Next Page
Loading...
