Appendix D Flash EPROM Support
112
AMIFlash Checkpoint Codes
Code
Description
02h
Verify the AMIFlash BIOS checksum and disable internal cache memory.
0Eh
Make the CMOS RAM checksum bad and initialize the CMOS RAM status
registers.
10h
Disable DMA Controllers 1 and 2. Disable Interrupt Controllers 1 and 2.
13h
Initialize the chipset registers.
18h
If the main BIOS is good, transfer control to the main BIOS.
1Bh
Initialize the system timer.
1Dh
Begin the refresh test.
20h
Begin the 16 KB base memory test.
23h
Initialize the interrupt vectors.
28h
Determine the CPU clock frequency.
30h
Program the system speed-dependent parameters according to the CPU clock
frequency.
40h
Begin the memory test.
50h
The memory test has completed.
65h
Initialize the DMA controller.
67h
Initialize the interrupt controller.
80h
Initialize the I/O chipset, if any.
85h
Enable the appropriate IRQs.
86h
Enable the internal cache memory.
88h
Initialize the floppy drives.
90h
Indicate an error. The BIOS stops here if there is an error.
A0h
Reading the floppy disk in drive A: to program the Flash EPROM.
E0h
Configure the proper stack.
E3h
Display a message to ask the user to insert the AMIFlash Floppy Disk in drive A:.
E4h
Floppy read error.
E5h
Begin the search for the S87P.ROM file in the floppy disk root directory.
E6h
The S87P.ROM file not present in the floppy disk root directory.
E7h
Begin reading the File Allocation Table.
E8h
Begin reading S87P.ROM, sector by sector.
E9h
S87P.ROM is not the proper size.
EFh
Disable internal cache memory.
F0h
Enable and reset flash memory.
F1h
Detect the flash type if present.
F2h
Flash memory not detected.
F3h
Begin erasing flash blocks.
F4h
Begin programming flash blocks.
FFh
Flash programming successful and the system reboots, if possible.
Содержание 87 Series
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