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some setup for filesystems

This commit is contained in:
'mr software' 2022-11-05 14:27:23 -07:00
parent a36708e476
commit 8cda624e50
2 changed files with 24 additions and 0 deletions
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1
config.s
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@ -3,3 +3,4 @@ NUMSEG equ 4; TODO build system should calculate this value
; might be good to move one of these into the high memory area ; might be good to move one of these into the high memory area
KERNEL_SEG equ 0x50 KERNEL_SEG equ 0x50
STACK_SEG equ 0x1050 STACK_SEG equ 0x1050
BOOTPART equ 0 ; 0-3

23
src/boot.s
View File

@ -36,5 +36,28 @@ retf
; TODO filesystem and reserve space for mbr partition table ; TODO filesystem and reserve space for mbr partition table
times 446 - ($-$$) db 0
times bootpart*16 db 0
; some programs do not accept values with bits 0-6 set
status db 0
; chs offset :/
off_head db 0
off_sector_cyl db 0
off_cyl_low db 0
; https://en.wikipedia.org/wiki/Partition_type
type db 0
; chs... end?
end_head db 0
end_sector_cyl db 0
end_cyl_low db 0
; lba :)
lba_off dd 0
lba_len dd 0
times 510 - ($-$$) db 0 times 510 - ($-$$) db 0
dw 0xAA55 dw 0xAA55