AMD 790GX, SB750 user manual Verify 8259 Channel 1 masked interrupts by

3C	Test Timer Counter 2	Test 8254 Timer 0 Counter 2.
3D	Reserved
3E	Test 8259-1 Mask	Verify 8259 Channel 1 masked interrupts by
	Bits	alternately turning off
		and on the interrupt lines.
3F	Reserved
40	Test 8259-2 Mask	Verify 8259 Channel 2 masked interrupts by
	Bits	alternately turning off
		and on the interrupt lines.

41Reserved

42Reserved

43	Test Stuck8259's	Turn off interrupts then verify no
	Interrupt Bits	interrupt mask register is on.
	Test 8259 Interrupt	Force an interrupt and verify the interrupt
	Functionality	occurred.

44Reserved

45Reserved

46Reserved

47	Set EISA Mode	If EISA non-volatile memory checksum is
		good, execute EISA initialization.
		If not, execute ISA tests an clear
		EISA mode flag.
48	Reserved
49	Size Base and	Size base memory from 256K to 640K and
	Extended Memory	extended memory above 1MB.
4A	Reserved
4B	Reserved
4C	Reserved
4D	Reserved
4E	Test Base and	Test base memory from 256K to 640K and
	Extended Memory	extended memory above 1MB using
		various patterns.
		NOTE: This test is skipped in EISA
		mode and can be skipped with ESC key
		in ISA mode.
4F	Reserved
50	USB init	Initialize USB controller
51	Reserved
52	Memory Test	Test all memory of memory above 1MB
		using Virtual 8086 mode,
		page mode and clear the memory

53Reserved

54Reserved

55	CPU display	Detect CPU speed and display
		CPU vendor specific version string
		and turn on all necessary CPU features
56	Reserved
57	PnP Init	Display PnP logo and PnP early init
58	Reserved
59	Setup Virus Protect	Setup virus protect according to Setup
5A	Reserved
5B	Awdflash Load	If required, will auto load
		Awdflash.exe in POST
5C	Reserved
5D	Onboard I/O Init	Initializing onboard superIO
5E	Reserved
5F	Reserved
60	Setup enable	Display setup message and enable setup
		functions
61	Reserved
62	Reserved
63	Initialize & Install	Detect if mouse is present, initialize
	Mouse	mouse, install interrupt
		53