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add BPB definitions as stand-alone include

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Nero 2021-12-14 15:24:36 +00:00
parent 467054def6
commit a3dfd2c36c
1 changed files with 19 additions and 0 deletions
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src/bpb.inc Normal file
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; BIOS parameter block
; We use DOS 3.31 version as common denominator
; Offset into boot sector
BPBOFF equ 0xB
BPBSS equ 0 ; word bytes per sector
BPBSC equ 2 ; byte sectors per cluster
BPBRSC equ 3 ; word reserved sector count
BPBFN equ 5 ; byte number of fat tables
BPBRDE equ 6 ; word root disk entries
BPBTS equ 8 ; word total sectors
BPBMD equ 10 ; byte media descriptor byte
BPBFS equ 11 ; word sectors per fat
BPBSPT equ 13 ; word sectors per track
BPBNOS equ 15 ; word number of sides/heads
BPBHS equ 17 ; dword partition offset
BPBLTS equ 21 ; dword large total sectors
BPBSIZ equ 25 ; size in bytes