| Code
|
Meaning
|
| 01
|
NMI
disabled & 286 reg. test about to start
|
| 02
|
286
register test over |
| 03
|
ROM
checksum OK |
| 04
|
8259
initialization OK |
| 05
|
CMOS
pending interrupt disabled |
| 06
|
Video
disabled & system timer counting OK |
| 07
|
CH-2
of 8253 test OK |
| 08
|
CH-2
delta count test OK |
| 09
|
CH-1
delta count test OK |
| 0A
|
CH-0
delta count test OK |
| 0B
|
Parity
status cleared |
| 0C
|
Refresh
& system timer OK |
| 0D
|
Refresh
link toggling OK |
| 0E
|
Refresh
period ON/OFF 50% OK |
| 10
|
Confirmed
refresh ON & about to start 64K memory
|
| 11
|
Address
line test OK |
| 12
|
64K
base memory test OK |
| 13
|
Interrupt
vectors initialized |
| 14
|
8042
keyboard controller test OK |
| 15
|
CMOS
read/write test OK |
| 16
|
CMOS
checksum/battery check OK |
| 17
|
Monochrome
mode set OK |
| 18
|
Colour
mode set OK |
| 19
|
About
to look for optional video ROM |
| 1A
|
Optional
video ROM control OK |
| 1B
|
Display
memory read/write test OK |
| 1C
|
Display
memory read/write test for alt display OK |
| 1D
|
Video
retrace check OK |
| 1E
|
Global
equipment byte set for video OK |
| 1F
|
Mode
set call for Mono/Colour OK |
| 20
|
Video
test OK |
| 21
|
Video
display OK |
| 22
|
Power
on message display OK |
| 30
|
Virtual
mode memory test about to begin |
| 31
|
Virtual
mode memory test started |
| 32
|
Processor
in virtual mode |
| 33
|
Memory
address line test in progress |
| 34
|
Memory
address line test in progress |
| 35
|
Memory
below 1MB calculated |
| 36
|
Memory
size computation OK |
| 37
|
Memory
test in progress |
| 38
|
Memory
initialization over below 1MB |
| 39
|
Memory
initialization over above 1MB |
| 3A
|
Display
memory size |
| 3B
|
About
to start below 1MB memory test |
| 3C
|
Memory
test below 1MB OK |
| 3D
|
Memory
test above 1MB OK |
| 3E
|
About
to go to real mode (shutdown) |
| 3F
|
Shutdown
successful and entered in real mode |
| 40
|
About
to disable gate A-20 address line |
| 41
|
Gate
A-20 line disabled successfully |
| 42
|
About
to start DMA controller test |
| 4E
|
Address
line test OK |
| 4F
|
Processor
in real mode after shutdown |
| 50
|
DMA
page register test OK |
| 51
|
DMA
unit-1 base register test about to start |
| 52
|
DMA
unit-1 channel OK; about to begin CH-2 |
| 53
|
DMA
CH-2 base register test OK |
| 54
|
About
to test f/f latch for unit-1 |
| 55
|
f/f
latch test both unit OK |
| 56
|
DMA
unit 1 & 2 programmed OK |
| 57
|
8259
initialization over |
| 58
|
8259
mask register check OK |
| 59
|
Master
8259 mask register OK; about to start slave
|
| 5A
|
About
to check timer and keyboard interrupt level
|
| 5B
|
Timer
interrupt OK |
| 5C
|
About
to test keyboard interrupt |
| 5D
|
ERROR!
timer/keyboard interrupt not in proper level
|
| 5E
|
8259
interrupt controller error |
| 5F
|
8259
interrupt controller test OK |
| 70
|
Start
of keyboard test |
| 71
|
Keyboard
BAT test OK |
| 72
|
Keyboard
test OK |
| 73
|
Keyboard
global data initialization OK |
| 74
|
Floppy
setup about to start |
| 75
|
Floppy
setup OK |
| 76
|
Hard
disk setup about to start |
| 77
|
Hard
disk setup OK |
| 79
|
About
to initialize timer data area |
| 7A
|
Verify
CMOS battery power |
| 7B
|
CMOS
battery verification done |
| 7D
|
About
to analyze diagnostic test results for memory
|
| 7E
|
CMOS
memory size update OK |
| 7F
|
About
to check optional ROM C000:0 |
| 80
|
Keyboard
sensed to enable setup |
| 81
|
Optional
ROM control OK |
| 82
|
Printer
global data initialization OK |
| 83
|
RS-232
global data initialization OK |
| 84
|
80287
check/test OK |
| 85
|
About
to display soft error message |
| 86
|
About
to give control to system ROM E000:0 |
| 87
|
System
ROM E000:0 check over |
| 00
|
Control
given to Int-19; boot loader |
