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Code Name Description
2E Reserved
2F Reserved
30 Reserved
31 Reserved
32 Reserved
33 Early keyboard
reset
Early Keyboard Reset
34 Reserved
35 Test DMA
Controller 0
Test DMA channel 0
36 Reserved
37 Test DMA
Controller 1
Test DMA channel 1
38 Reserved
39 Test DMA Page
Registers
Test DMA Page Registers
3A Reserved
3B Reserved
3C Test Timer Test 8254 Timer 0 Counter 2.
3D Reserved
3E Test 8259-1 Mask Verify 8259 Channel 1 masked interrupts by
alternately turning off and on the interrupt lines.
3F Reserved
40 Test 8259-2 Mask Verify 8259 Channel 2 masked interrupts by
alternately turning off and on the interrupt lines.
41 Reserved
42 Reserved
43 Test Stuck
Interrupt
Turn off interrupts then verify no 8259's interrupt
mask register is on. Test 8259 Force an interrupt and
verify the interrupt occurred.
44 Reserved
45 Reinit serial port Reinitialize Preboot agent serial port
46 Reserved
47 EISA Test If EISA non-volatile memory checksum is good,
execute EISA initialization. If not, execute ISA tests
and clear EISA mode flag.