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FULLOUT.ASM
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290 lines (242 loc) · 7.94 KB
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;▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓
;▓▓ ▓▓
;▓▓ Защита от выгорания : ▓▓
;▓▓ отключает регенерацию экрана по <Scroll Lock> ▓▓
;▓▓ ▓▓
;▓▓ (C) TigerSoft Lab v 1.0 1996 ▓▓
;▓▓ ▓▓
;▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓
.MODEL tiny
.CODE
.STARTUP
jmp init
;---------------------------
; Обработчик 9h прерывания
;---------------------------
id_treater = $
interrupt proc far
pushf
cli
push ax
push es
in al,60h ; port 60h, keybd scan or sw1
test cs:flg,10000000b
jz next11
cmp al,0fah
je runint
cmp al,0c6h
je runint
cmp al,0e0h
je runint
jmp short show
next11:
cmp al,46h ; 'S'
jne runint ; Jump if not equal
;---------------------------
mov ax,1201h
mov bl,36h
int 10h
or cs:flg,10000000b
or cs:flg,00000001b
mov ax,40h
mov es,ax
mov al,es:[17h] ; keep Keyboard Condition Word
mov cs:kbd_byte,al
jmp short quit10
show:
mov ax,1200h
mov bl,36h
int 10h
and cs:flg,01111111b
quit10:
in al,61h ; port 61h, 8255 port B, read
mov ah,al
or al,80h
out 61h,al ; port 61h, 8255 B - spkr, etc
xchg ah,al
out 61h,al ; port 61h, 8255 B - spkr, etc
mov al,20h ; ' '
out 20h,al ; port 20h, 8259-1 int command
pop es
pop ax
sti
popf
iret
runint:
pop es
pop ax
sti
popf
db 0EAh
_int label dword
oldXXo dw 0
oldXXs dw 0
flg db 00h
count db 0
kbd_byte db 0
interrupt endp
timer proc near
test cs:flg,10000000b
jnz next21
test cs:flg,00000001b
jz non_act01
push es
push ax
mov ax,40h
mov es,ax
mov al,cs:kbd_byte
mov es:[17h],al
and cs:flg,11111110b
jmp short okey01
next21:
inc cs:count
cmp cs:count,3
jl non_act01
mov cs:count,0
or cs:flg,01000000b
push es
push ax
mov ax,40h
mov es,ax
test cs:flg,00100000b
jz lamp_on
and byte ptr es:[17h],11101111b ; lamp off
and cs:flg,11011111b
jmp short okey01
lamp_on:
or byte ptr es:[17h],00010000b
or cs:flg,00100000b
okey01:
pop ax
pop es
non_act01:
db 0EAh
oldofs01 dw 0
oldseg01 dw 0
timer endp
sizetsr = ($ - id_treater)
sizetsrp = (($ - id_treater)/16 + 1)
init proc near
push ES
mov AX,DS:[2Ch]
mov ES,AX
mov AH,49h
int 21h
pop ES
push DS
push ES
mov AX,3509h ;****** edit here ****
int 21h
mov CS:oldXXo,BX
mov CS:oldXXs,ES
mov AX,3508h ;****** edit here ****
int 21h
mov CS:oldofs01,BX
mov CS:oldseg01,ES
mov bx,sizetsrp
call analog48
jc exit00
mov mem,ax
cld
mov es,ax
xor di,di
mov si,offset interrupt
mov cx,sizetsr
rep movsb
mov ax,mem
xor dx,dx
mov ds,ax
mov AX,2509h ;***** edit here ******
int 21h
mov ax,offset interrupt
mov dx,offset timer
sub dx,ax
mov AX,2508h ;***** edit here ******
int 21h
pop es
pop ds
mov ah,9h
mov dx,offset hello
int 21h
exit00:
int 20h
;-----------------------------
hello db 13,10,"Save screen : regeneration off",13,10
db "Activate - <Scroll Lock>",13,10
db "Copyright (C) TigerSoft Lab v 1.2 , 1996",13,10,"$"
mem dw 0
;------------------------------
init endp
;-----------------------------
analog48 proc near
push es
push bx
push cx
push dx
push di
mov cx,bx
mov ah,52h ; получение адреса 1-го MCB
int 21h
sub bx,2
xor di,di
mov dx,es:[bx]
mov es,dx ; в ES
mov dx,0ffffh ; в DX размер оптимального MCB
repeat:
mov ax,es:[01] ; [01] - владелец блока
cmp ax,0
jne next
mov ax,es:[03] ; [03] - размер блока
cmp ax,cx
jb next ; размер меньше требуемого ?
cmp ax,dx
jae next ; больше оптимального ?
mov di,es ; запоминание
mov dx,ax ; оптимального MCB
next:
mov al,es:[00]
cmp al,"Z" ; если маркер Z, то последний MCB
je exit
mov ax,es:[03] ; переход к следующему MCB
mov bx,es
add bx,ax
inc bx
mov es,bx
jmp short repeat
exit:
or di,di
jnz next01 ; найден хотя бы один блок ?
stc ; set CF
jmp short next03
next01:
; оптимальный блок найден, теперь его выделяем
mov es,di
mov word ptr es:[01],7 ; '7'- признак занятости
sub dx,cx
cmp dx,2
jb next02 ; не нужна коррекция размера ?
; если Да, то из этого блока памяти делаем два,
; т. е. из пустого пространства делаем еще один блок
mov al,es:[00]
mov byte ptr es:[00],"M"
mov es:[03],cx
mov bx,es
add bx,cx
inc bx ; в его ES адрес
mov es,bx
mov es:[00],al
mov word ptr es:[01],0000h
dec dx
mov word ptr es:[03],dx
next02:
mov ax,di
inc ax
next03:
pop di
pop dx
pop cx
pop bx
pop es
ret
analog48 endp
end