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Function 69h Get or Set BIOS Parameter Block Extention (DOS 4.0)

entry AH 69h

AL 00 Get BPBE

DS:DX Buffer Address

return copy of BPBE in Buffer.

01 Write buffer to BPBE

DS:DX Buffer Address

return Buffer contents written to disk as BPBE.

BL Drive Number

return CF set if error

AX error code

note 1) Ref: PC Magazine Vol 11 No 13 Pg 495

2) The BIOS Parameter Block Extension is an addition to the BIOS Parameter

Block added in DOS 4.0 which contains an Information Level(?), Diskett

Serial Number, a copy of the volumn lable, and the name of the file

system used.

Offset Length Name

-- ------- ---------------------------------

00 WORD Information Level(?)

02 LONGINT Serial Number

11 BYTE Volumn Lable (?)

8 BYTE File System ('FAT12' or 'FAT16')




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