30 lines
1.0 KiB
NASM
30 lines
1.0 KiB
NASM
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; DOS 3.31 Bios Parameter Block
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bpb_ss: equ 0x00 ; WORD sector size
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bpb_sc: equ 0x02 ; BYTE sector / cluster
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bpb_rsc: equ 0x03 ; WORD reserved sector count
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bpb_fn: equ 0x05 ; BYTE fat number
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bpb_rde: equ 0x06 ; WORD root dir entries
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bpb_ts: equ 0x08 ; WORD total sectors
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bpb_md: equ 0x0A ; BYTE media descriptor
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bpb_sf: equ 0x0B ; WORD sectors / fat
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bpb_spt: equ 0x0D ; WORD sectors per track
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bpb_nos: equ 0x0F ; WORD number of sides
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bpb_po: equ 0x11 ; DWORD partition offset
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bpb_lts: equ 0x15 ; DWORD large total sectors
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; DOS 4.0 Extended Bios Parameter Block
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bpb4_dn: equ 0x19 ; BYTE drive number
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bpb4_sig: equ 0x1B ; BYTE 29h
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bpb4_ser: equ 0x1C ; DWORD serial
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; DOS 7.1 Extended Bios Parameter Block
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bpb7_lsf: equ 0x19 ; DWORD large sectors / fat
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bpb7_rdc: equ 0x21 ; DWORD root directory cluster
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bpb7_fsc: equ 0x25 ; WORD fsinfo sector
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bpb7_bsc: equ 0x27 ; WORD backup boot sector
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bpb7_dn: equ 0x35 ; BYTE drive number
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bpb7_sig: equ 0x37 ; BYTE 28h or 29h
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bpb7_ser: equ 0x38 ; DWORD serial
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bpb_len: equ 0x4F
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