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Remove fields from BPB that are EBPB actually 

This is just a trick so i can use bpb_size in the kernel later,
omitting things that are not relevant to interfacing the FS.
This commit is contained in:
Nero 2020-10-15 20:20:17 +00:00
parent 7b18c6d236
commit ca3eebd692
2 changed files with 2 additions and 6 deletions
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4
boot/fat.asm
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@ -75,7 +75,7 @@ read: push ax
; dl bit 6-7: cylinder bits 8-9 ; dl bit 6-7: cylinder bits 8-9
mov cx, dx mov cx, dx
mov dh, al mov dh, al
mov dl, [bp+bpb.drivenum] mov dl, [bp-1]
mov ax, 0x0201 mov ax, 0x0201
mov bx, di mov bx, di
@ -128,7 +128,7 @@ resetbuf: ; DS = ES
ret ret
main: mov bp, params main: mov bp, params
mov [bp+bpb.drivenum], dl mov [bp-1], dl
; load root directory ; load root directory
call resetbuf call resetbuf

4
inc/bpb.asm
View File

@ -11,8 +11,4 @@ struc bpb
.heads: resw 1 ; WORD number of sides .heads: resw 1 ; WORD number of sides
.sectoroffset: resd 1 ; DWORD partition offset .sectoroffset: resd 1 ; DWORD partition offset
.longtotal: resd 1 ; DWORD large total sectors .longtotal: resd 1 ; DWORD large total sectors
.drivenum: resb 1 ; BYTE drive number
.flags: resb 1
.signature: resb 1 ; BYTE 28h
.serial: resb 4 ; DWORD serial
endstruc endstruc