Appendix A
Chips & Tech (63)Protected mode interrupt.
ACER (64)Start test real time clock.
AMI
AST
(64)BIOS ROM data area check halfway. BIOS ROM data area check to be
complete.
(64)Copy BIOS to shadow RAM.
(64)Start test of real memory.
Chips & Tech (64)Address line A20.
Phoenix
AMI
AST
(64)Jump to User Patch 1.(Beep)=2-3-2-1.Shadow memory test.
Error Code - 65
(65)DMA #2 base register test passed. About to program DMA unit 1 and 2. (65)Copy
video BIOS to shadow RAM.
(65)Start test of extended memory.
Chips & Tech (65)Memory address lines.
AMI
AST
(66)DMA unit 1 and 2 programming over. About to initialize 8259 interrupt
controller.
(66)8254 timer channel #2.
(66)Save size of real and extended memory.
Chips & Tech (66)Memory Test.
Compaq
AMI
AST
(66)Configure advanced cache registers.(Beep)=2-3-2-3. Extended memory test.
Error Code - 67
(67)8259 initialization over. About To start keyboard test.
(67)Memory initialize.
Option installed CMOS bit.
Chips & Tech (67)Extended memory.
Phoenix (67)Initialize Multi Processor APIC.
ACER (68)Test floppy disk.
Compaq
(68)Prepare to return to real mode.
Chips & Tech (68)Timer interrupt.
Phoenix
(68)Enable external and CPU caches.(Beep)=2-3-3-1. Ex- tended address test.
Error Code - 69
Chips & Tech (69)Real Time clock.
Phoenix
(69)Setup System Management Mode(SMM) area.
Error Code - 6A
Chips & Tech (6A) Keyboard controller.
Phoenix (6A) Display external cache size.(Beep)=2
Compaq (6B)Display error messages.
Chips & Tech (6B)Test Math chip.
Phoenix
ACER
(6B)Load custom defaults(optional).
(6C)Test hard disk drive.
Chips & Tech (6C)Test serial port(RS232).
Phoenix
(6C)Display shadow message.(Beep)=2-3-4-1.Display error messages.
Error Code - 6D
(6D)Initialize KB OK display string.
Chips & Tech (6D)Test parallel ports.
Compaq (6E)Determine size to test. Chips
Phoenix
Compaq
(6E)Display possible high address for UMB recovery. Display non-disposable
segments.(Beep)=2-3-4-3.Configure ROM/RAM BIOS.
Error Code - 6F
(6F)Start of MEMORY TEST.
Chips & Tech (6F)Test floppy drive controller.
ACER
AMI
(70)About to test parallel port.
(70)start of keyboard test.
Chips & Tech (70)Test hard drive controller.
Phoenix
AMI
(70)Display error messages.(Beep)=2-4-1-1.System time test.
Error Code - 71 (71)Keyboard
controller BAT test over.
(71)Test each RAM segment.
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