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Raptor AT – Installation Guide
66
The system BIOS passes control to different buses at the following
checkpoints:
High Byte The high byte of these checkpoints includes the following
information:
Bits Description
Bits 7-4
0000 Function 0. Disable all devices on the bus.
0001 Function 1. Initialize static devices on the bus.
0010 Function 2. Initialize output devices on the bus.
0011 Function 3. Initialize input devices on the bus.
0100 Function 4. Initialize IPL devices on the bus.
0101 Function 5. Initiate general devices on the bus.
0110 Function 6. Initialize error reporting on the bus.
0111 Function 7. Initialize add-on ROMs for all buses.
Bits 3-0
Specify the bus
0 Generic DIM Device Initialization Manager.
1 Onboard System devices.
2 ISA devices.
3 EISA devices.
4 ISA PnP devices.
5 PCI devices.
Table D-9 AMIBIOS Beep Codes
Except for beep code #8, these codes are always fatal.
1 beep
Refresh failure.
2 beeps
Parity error.
3 beeps
Base 64K memory failure.
4 beeps
Timer not operational.
5 beeps
Processor error.
6 beeps
8042 - gate A20 failure.
7 beeps
Processor exception interrupt error.
8 beeps
Display memory read/write failure.
9 beeps
ROM checksum error.
10 beeps
CMOS shutdown register read/write error.
11 beeps
Cache memory bad.