kolibrios-gitea/kernel/trunk/detect/biosdisk.inc

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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2008. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; Detect all BIOS hard drives.
; diamond, 2008
xor cx, cx
mov es, cx
mov di, 0x9080
mov byte [es:di-1], cl
cmp [preboot_biosdisk], 1
jnz bdde
mov dl, 80h
bdds:
mov ah, 15h
push cx dx di
int 13h
pop di dx cx
jc bddc
test ah, ah
jz bddc
inc cx
mov ah, 48h
push ds
push es
pop ds
mov si, 0xA000
mov word [si], 1Eh
mov ah, 48h
int 13h
pop ds
jc bddc2
inc byte [es:0x907F]
cmp word [es:si], 1Eh
jb bddl
cmp word [es:si+1Ah], 0xFFFF
jz bddl
mov al, dl
stosb
push ds
lds si, [es:si+1Ah]
mov al, [si+6]
and al, 0xF
stosb
mov al, byte [si+4]
shr al, 4
and ax, 1
cmp word [si], 1F0h
jz @f
inc ax
inc ax
cmp word [si], 170h
jz @f
or ax,-1
; mov ax, -1
@@:
stosw
pop ds
jmp bddc2
bddl:
mov al, dl
stosb
xor ax,ax
stosb
dec ax
stosw
; mov al, 0
; stosb
; mov ax, -1
; stosw
bddc2:
cmp cl, [es:0x475]
jae bdde
bddc:
inc dl
jnz bdds
bdde: