Compare commits
3 commits
Author | SHA1 | Date | |
---|---|---|---|
|
199f632d53 | ||
|
1cbd918b56 | ||
|
fea43699d7 |
3 changed files with 18 additions and 9 deletions
2
Makefile
2
Makefile
|
@ -2,7 +2,7 @@ DOSBOX=dosbox -conf dosbox-build.conf -exit
|
||||||
|
|
||||||
ordos.img: BOOT.BIN IO.SYS ORDOS.SYS COMMAND.COM debug.com edlin.com exe2bin.exe link.exe masm.exe
|
ordos.img: BOOT.BIN IO.SYS ORDOS.SYS COMMAND.COM debug.com edlin.com exe2bin.exe link.exe masm.exe
|
||||||
rm -f ordos.img
|
rm -f ordos.img
|
||||||
mkfs.fat -C $@ -M 0xff 320
|
mkfs.fat -C $@ 720
|
||||||
rw -I 0x7c00 -i BOOT.BIN -o $@ -c 512
|
rw -I 0x7c00 -i BOOT.BIN -o $@ -c 512
|
||||||
mcopy -i $@ IO.SYS ::
|
mcopy -i $@ IO.SYS ::
|
||||||
mcopy -i $@ ORDOS.SYS ::
|
mcopy -i $@ ORDOS.SYS ::
|
||||||
|
|
12
boot.asm
12
boot.asm
|
@ -17,12 +17,12 @@ jmp code
|
||||||
dw 512 ; Bytes per sector
|
dw 512 ; Bytes per sector
|
||||||
db 2 ; Sectors per cluster
|
db 2 ; Sectors per cluster
|
||||||
dw 1 ; Reserved sectors
|
dw 1 ; Reserved sectors
|
||||||
db 2 ; FATs
|
fats db 2 ; FATs
|
||||||
dw 112 ; Root directory entries
|
dw 112 ; Root directory entries
|
||||||
dw 2*320 ; Total sectors
|
dw 2*720 ; Total sectors
|
||||||
db 0ffh ; Media descriptor
|
db 0f9h ; Media descriptor
|
||||||
dw 1 ; Sectors per fat
|
sectorsperfat dw 3 ; Sectors per fat
|
||||||
sectorspertrack dw 8
|
sectorspertrack dw 9
|
||||||
heads dw 2
|
heads dw 2
|
||||||
dd 0 ; Hidden sectors
|
dd 0 ; Hidden sectors
|
||||||
dd 0 ; Total sectors (large)
|
dd 0 ; Total sectors (large)
|
||||||
|
@ -40,7 +40,7 @@ code:
|
||||||
mov drivenumber, dl
|
mov drivenumber, dl
|
||||||
|
|
||||||
; TODO: Check we actually have the OS
|
; TODO: Check we actually have the OS
|
||||||
mov ax, 10
|
mov ax, 14
|
||||||
mov bx, 600h
|
mov bx, 600h
|
||||||
mov cx, 17 ; This is what PC-DOS 1.10's full size ends up at
|
mov cx, 17 ; This is what PC-DOS 1.10's full size ends up at
|
||||||
call loadsectors
|
call loadsectors
|
||||||
|
|
13
io.asm
13
io.asm
|
@ -568,14 +568,15 @@ code ends
|
||||||
|
|
||||||
constants segment
|
constants segment
|
||||||
|
|
||||||
sectorspertrack dw 8 ; TODO: Don't hardcode
|
sectorspertrack dw 9 ; TODO: Don't hardcode
|
||||||
heads dw 2 ; TODO: Don't hardcode
|
heads dw 2 ; TODO: Don't hardcode
|
||||||
|
|
||||||
disks_table:
|
disks_table:
|
||||||
db 1 ; 1 drive, TODO: Don't hardcode
|
db 1 ; 1 drive, TODO: Don't hardcode
|
||||||
|
|
||||||
db 0 ; Physical drive 0
|
db 0 ; Physical drive 0
|
||||||
dw offset iogroup:parameters_320k
|
;dw offset iogroup:parameters_320k
|
||||||
|
dw offset iogroup:parameters_720k
|
||||||
|
|
||||||
parameters_320k:
|
parameters_320k:
|
||||||
dw 512 ; Sector size in bytes
|
dw 512 ; Sector size in bytes
|
||||||
|
@ -585,6 +586,14 @@ parameters_320k:
|
||||||
dw 112 ; Number of directory entries
|
dw 112 ; Number of directory entries
|
||||||
dw 320*2 ; Number of sectors
|
dw 320*2 ; Number of sectors
|
||||||
|
|
||||||
|
parameters_720k:
|
||||||
|
dw 512 ; Sector size in bytes
|
||||||
|
db 2 ; Sectors per cluster
|
||||||
|
dw 1 ; Number of reserved sectors
|
||||||
|
db 2 ; Number of FATs
|
||||||
|
dw 112 ; Number of directory entries
|
||||||
|
dw 720*2 ; Number of sectors
|
||||||
|
|
||||||
doubleticks_per_hour dw 32772 ; 1800B0h / 2 / 24
|
doubleticks_per_hour dw 32772 ; 1800B0h / 2 / 24
|
||||||
ticks_per_minute dw 1092 ; 1800B0h / 24 / 60
|
ticks_per_minute dw 1092 ; 1800B0h / 24 / 60
|
||||||
ticks_per_second dw 18 ; 1800B0h / 24 / 60 / 60
|
ticks_per_second dw 18 ; 1800B0h / 24 / 60 / 60
|
||||||
|
|
Loading…
Reference in a new issue