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AMI BIOS - Flash ROM - READ FLASH BIOS

AX = DB00h
DS:SI -> parameter block (see #00544)
ES:DI -> buffer for copied information

Return:
CF clear if successful
CF set on error
AH = status (86h if not implemented)
DS,ES destroyed, possibly other registers

Note: Used by FMUP.EXE, Intel's Flash Memory Update utility

See Also: AH=DAh - AX=DB01h - AX=DB04h

Format of AMI BIOS Flash ROM parameter block:

Offset  Size    Description     (Table 00544)
00h 32 BYTEs   ASCIZ description of the file's contents
20h    BYTE    Logical area type (see #00545)
21h    DWORD   logical area size (overall size of area)
25h    BYTE    flag:
Load from file (FF=yes, 00=no)
26h    BYTE    flag:
Reboot after update (FF=yes, 00=no)
27h    BYTE    flag:
Update entire image (FF=yes, 00=no)
28h 24 BYTEs   ASCIZ logical area name (cooresponds to offset 20)
"System BIOS"
"Logo Data Area", etc.
40h 15 BYTEs   ASCIZ time stamp string:
MM/DD/YY-HH:MM
4Fh    BYTE    checksum for this header (sum of all bytes except this one)
if checksum would be 00h,01h, or FFh, it is set to 2Ah
50h    DWORD   this file's starting address (offset in image)
54h    DWORD   size of image chunk in this file
58h    BYTE    logical area type - same as offset 20h
59h    BYTE    flag:
Last file in chain (FF=yes, 00=no)
5Ah  6 BYTEs   ASCIZ signature "FLASH"
60h 16 BYTEs   ASCIZ filename of next file in chain
70h 16 BYTEs   ASCIZ BIOS reserved string (usually version #)

Notes: This block is identical in format to the 128-byte header on an AMI BIOS Update file.

For AX=DB00h, the following fields must be specified:
50h,54h,58h;
the fields at offset 20h and 5Ah should also be set if possible.
The fields at offsets 40h and 70h will be set on return, if available

See Also: #00546

Category: Vendor-specific BIOS Extensions - Int 15h - A

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