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Use uppercase non-struct constants for BPB

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Nero 2020-10-25 09:15:33 +00:00
parent dc6035fe9d
commit 50aa6e4eec
4 changed files with 47 additions and 95 deletions
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40
inc/bpb.asm
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@ -1,14 +1,26 @@
struc bpb
.sectorsize: resw 1 ; WORD sector size
.clustersects: resb 1 ; BYTE sector / cluster
.reservedsects: resw 1 ; WORD reserved sector count
.fatnumber: resb 1 ; BYTE fat number
.direntries: resw 1 ; WORD root dir entries
.total: resw 1 ; WORD total sectors
.mediadesc: resb 1 ; BYTE media descriptor
.fatsectors: resw 1 ; WORD sectors / fat
.tracksectors: resw 1 ; WORD sectors per track
.heads: resw 1 ; WORD number of sides
.sectoroffset: resd 1 ; DWORD partition offset
.longtotal: resd 1 ; DWORD large total sectors
endstruc
BPBOFF equ 0xB
; DOS 2.0 BPB
BPBSS equ 0 ; word
BPBSC equ 2 ; byte
BPBRSC equ 3 ; word
BPBFN equ 5 ; byte
BPBRDE equ 6 ; word
BPBTS equ 8 ; word
BPBMD equ 10 ; byte
BPBFS equ 11 ; word
BPBSIZ2 equ 13 ; size constant
; DOS 3.31 BPB
BPBSPT equ 0x0D ; word
BPBNOS equ 0x0F ; word
BPBHS equ 0x11 ; dword
BPBLTS equ 0x15 ; dword
BPBSIZ3 equ 25 ; size constant
; DOS 3.4 EBPB
BPBDN equ 0x19 ; byte
BPBFALG equ 0x1A ; byte
BPBSIG equ 0x1B ; byte
BPBSER equ 0x1C ; dword serial number
BPBSIZ4 equ 32 ; size constant