| 04 |
CPU verification; POST
start |
| 08 |
Shutdown condition 0; Shutdown
byte 0 |
| 0C |
BIOS ROM checksum tested |
| 10 |
CMOS ROM shutdown byte
tested |
| 14 |
DMA controller tested |
| 18 |
System timer initialized |
| 1C |
Memory refresh system tested |
| 1E |
Memory type determined |
| 20 |
Base 128K memory tested |
| 24 |
8042 keyboard controller
tested |
| 28 |
CPU descriptor instruction
tested |
| 2C |
8259 PIT tested |
| 30 |
Temporary Interrupts located
and initialized |
| 34 |
BIOS Interrupt vectors
and routines configured |
| 38 |
CMOS RAM tested |
| 3C |
Memory size determined |
| 40 |
Shutdown condition 1 |
| 44 |
Video BIOS ROM initialized |
| 45 |
RAM initialized and tested |
| 46 |
Cache memory and controller
initialized and tested |
| 48 |
Memory tested |
| 4C |
Shutdown condition 3 |
| 50 |
Shutdown condition 2 |
| 54 |
Shutdown condition 7 |
| 58 |
Shutdown condition 6 |
| 5C |
Keyboard and auxiliary
I/O tested |
| 60 |
BIOS Interrupt routines
setup |
| 64 |
RTC tested |
| 68 |
Floppy drive and controller
tested |
| 6C |
Hard drive and controller
tested |
| 70 |
Parallel port tested |
| 74 |
Serial port tested |
| 78 |
Time of day setup |
| 7C |
Optional ROM's searched
for and started |
| 80 |
Math coprocessor tested |
| 84 |
Keyboard tested |
| 88 |
System initialized |
| 8C |
System initialized |
| 90 |
Operating system boot process
started |
| 94 |
Shutdown condition 5 |
| 98 |
Shutdown condition A |
| 9C |
Shutdown condition B |