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Appendix A
Error Code-00
(00)Going to give control to INT 19H boot loader.
Error Code-01
(01)Processor register test about to start, and NMI to be disabled,286 reg. test about
to start.
(01)Processor test 1;Processor status(1FLAGS) verification; Tests the following processor
status flags carry, zero, sign, overflow. The BIOS will set each of these
flags, verify they are set then turn each flag off and verify it is off.
(01)[Beep]=none 80286 register test in -progress.
Error Code - 02
(02)NMI is disabled. Power on delay starting. Power on de- lay starting.286reg.
(02)Test CPU register.
(02)Processor test 2;Read/write/verify all CPU registers except SS,SP and BP with
data pattern FF&00.Determine status of manufacturing jumper.
(02)Test CPU register.
(02)[Beep]=1-1-3 CMOS write/read test .
(02)Verify real-mode operation(Beep)=1-1-1-3.CPU Flags test.
(02)[Beep]=1-1-3 CMOS write/read test in-progress or failure.
Error Code - 03
(03)Power on delay complete. To check soft reset/power-on. Any initialization
before keyboard BAT is in progress. ROM BIOS checksum(32K at F800:0) passed.
(03)Test 8042 keyboard controller reset.
(03)Initialize Chips; Disable NMI,PIE,AIE,UEI,SQWV, disable video, parity
checking, DMA; Reset math Coprocessor; Clear all page registers, CMOS shutdown byte;
Initialize timer 0,1 and 2 including set EISA timer to a known
state; Initialize DMA controllers 0 and 1; Initialize interrupt controller 0 and 1;Initialize EISA
extended registers. Calculate BIOS EPROM and sign-on message checksum; fail if not
0.Initialize EISA registers(EISA)BIOS only).Clear 8042 keyboard controller.
AMI
AMI
Award
Phoenix
AMI
AST
Award
Chips&Tech
Dell
Phoenix
Phoenix
AMI
AST
Award
Chips & Tech (03)ROM did not checksum.
Phoenix&Dell
(03)Disable Non-Maskable Interrupt(NMI).[Beep]=1-1-4 BIOS ROM checksum
in-progress or failure.
Error Code
-
04
AMI
AST
Award
(04)Any initialization before keyboard BAT is complete. Reading keyboard SYS
bit, to check soft reset/power-on. Reading keyboard SYS bit, to check soft reset/power On.
Keyboard controller test with and without mouse passed. 8259 initialization OK.
(04)Low level keyboard communication, keyboard ID verification.
(04)Test memory refresh toggle; RAM must be periodically refreshed in order to
keep the memory from decaying. This function assures that the memory refresh
function is working properly. Test CMOS RAM I/O port interface and verify battery
power is available(bat. status=1).Reset 8042.
Chips & Tech (04)DMA Controller failed.
Phoenix&Dell
(04)Get the CPU type (Beep)=1-1-2-1.CPU register test. Programmable Interval
Timer test failure.
Erro
r Code
-
05
AMI
AST
(05)Soft reset/power-on determined. Going to enable ROM. i.e. disable shadow
RAM/Cache if any. Going to enable ROM.i.e. disable shadow RAM/cache if any. Chipset
initialization over, DMA and interrupt controller disabled. CMOS pending interrupt disabled.
(05)Read keyboard input port.
Chips & Tech (05)System timer bad.
(05)Keyboard controller self-test enable keyboard interface. Blank video, Initialize
keyboard; Keyboard controller initialization. Initialize Chips; Disable
Award
NMI,PIE,AIE,UEI, SQ
- WV, disable video, parity checking, DMA; Reset math Co-
processor; Clear all page registers,CMOS shutdown byte; Initialize timer 0,1 and 2 including
set EISA timer to a known state; Initialize DMA controllers 0 and 1;Initialize interrupt
controller 0 and 1; Initialize EISA extended Regis- ters.Get manufacturing status, reset if
set(loop 1
-
5).
Phoenix&Dell (05)[Beep]=1-2-2 DMA initialization in-progress or failure.
5