;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; Shutdown for Menuet
;;
;; Distributed under General Public License
;; See file COPYING for details.
;; Copyright 2003 Ville Turjanmaa
;;
align 4
pr_mode_exit:
; setup stack
mov ax, 0x3000
mov ss, ax
mov esp, 0x0EC00
; setup ds
push cs
pop ds
lidt [old_ints_h]
;remap IRQs
mov al,0x11
out 0x20,al
call rdelay
out 0xA0,al
call rdelay
mov al,0x08
out 0x21,al
call rdelay
mov al,0x70
out 0xA1,al
call rdelay
mov al,0x04
out 0x21,al
call rdelay
mov al,0x02
out 0xA1,al
call rdelay
mov al,0x01
out 0x21,al
call rdelay
out 0xA1,al
call rdelay
mov al,0xB8
out 0x21,al
call rdelay
mov al,0xBD
out 0xA1,al
sti
temp_3456:
xor ax,ax
mov es,ax
mov al,byte [es:0x9030]
cmp al,1
jl nbw
cmp al,4
jle nbw32
nbw:
in al,0x60
call pause_key
cmp al,6
jae nbw
mov bl,al
nbw2:
in al,0x60
call pause_key
cmp al,bl
je nbw2
cmp al,240 ;ax,240
jne nbw31
mov al,bl
dec ax
jmp nbw32
nbw31:
add bl,128
cmp al,bl
jne nbw
sub al,129
nbw32:
dec ax ; 1 = write floppy
js nbw
jnz no_floppy_write
call floppy_write
jmp temp_3456 ;nbw
no_floppy_write:
dec ax ; 2 = power off
jnz no_apm_off
call APM_PowerOff
jmp $
no_apm_off:
dec ax ; 3 = reboot
jnz restart_kernel ; 4 = restart kernel
push 0x40
pop ds
mov word[0x0072],0x1234
jmp 0xF000:0xFFF0
pause_key:
mov cx,100
pause_key_1:
loop pause_key_1
ret
rdelay:
ret
floppy_write: ; write diskette image to physical floppy
cmp [flm],byte 1
je fwwritedone
mov [flm],byte 1
xor ax, ax ; reset drive
xor dx, dx
int 0x13
mov cx,0x0001 ; startcyl,startsector
xor dx, dx ; starthead,drive
mov ax, 80*2 ; read no of sect
fwwrites:
push ax
; move 1mb+ -> 0:a000
pusha
mov si, fwmovedesc
mov cx,256*18
mov ah,0x87
push ds
pop es
int 0x15
add dword [fwmovedesc+0x12], 512*18
popa
xor si,si
mov es,si
fwnewwrite:
mov bx,0xa000 ; es:bx -> data area
mov ax,0x0300+18 ; read, no of sectors to read
int 0x13
test ah, ah
jz fwgoodwrite
inc si
cmp si,10
jnz fwnewwrite
; can't access diskette - return
pop ax
ret
fwgoodwrite:
inc dh
cmp dh,2
jnz fwbb2
mov dh,0
inc ch
fwbb2:
pop ax
dec ax
jnz fwwrites
ret
APM_PowerOff:
mov ax, 5304h
xor bx, bx
int 15h
;!!!!!!!!!!!!!!!!!!!!!!!!
mov ax,0x5300
xor bx,bx
int 0x15
push ax
mov ax,0x5301
xor bx,bx
int 0x15
mov ax,0x5308
mov bx,1
mov cx,bx
int 0x15
mov ax,0x530E
xor bx,bx
pop cx
int 0x15
mov ax,0x530D
mov bx,1
mov cx,bx
int 0x15
mov ax,0x530F
mov bx,1
mov cx,bx
int 0x15
mov ax,0x5307
mov bx,1
mov cx,3
int 0x15
;!!!!!!!!!!!!!!!!!!!!!!!!
fwwritedone:
ret
restart_kernel:
mov ax,0x0003 ; set text mode for screen
int 0x10
jmp 0x4000:0000
restart_kernel_4000:
cli
push ds
pop es
mov cx, 0x8000
push cx
mov ds, cx
xor si, si
xor di, di
rep movsw
push 0x9000
pop ds
push 0x2000
pop es
pop cx
rep movsw
wbinvd ; write and invalidate cache
mov al, 00110100b
out 43h, al
jcxz $+2
mov al, 0xFF
out 40h, al
jcxz $+2
out 40h, al
jcxz $+2
sti
; (hint by Black_mirror)
; We must read data from keyboard port,
; because there may be situation when previous keyboard interrupt is lost
; (due to return to real mode and IRQ reprogramming)
; and next interrupt will not be generated (as keyboard waits for handling)
in al, 0x60
; bootloader interface
push 0x1000
pop ds
mov si, kernel_restart_bootblock
mov ax, 'KL'
jmp 0x1000:0000