;Pythonica.asm
.model tiny
.code
org 100h
.386
Start:
        mov ax, 83h
        int 10h
        mov ax, 0B800h
        mov ds, ax
        mov es, ax
cycle_lp:
        mov bx, 24*2*80
        push word ptr [bx]
        pop ax
	mov cx, 80
	mov si, bx
        add si, 2
	mov di, bx
	cld
	rep movsw

        mov bx, 22*2*80
next_:
        push bx
        call dblrot
        pop bx
        sub bx, 2*2*80
        jns next_
        mov bx, 25*2*80-2
        push ax
        pop word ptr [bx]

	mov ah, 86h
	mov cx, 0
	mov dx, 65000
	int 15h
	mov ah, 0Bh
	int 21h
	test al, al
	je cycle_lp
        ret

dblrot proc near
;Вход: [bx] - 1-й эл-т;
;      ax-последний
;Выход: ax - 1-й эл-т;
	push word ptr [bx]
	mov cx, 80
	mov si, bx
        add si, 2
	mov di, bx
	cld
	rep movsw
	add bx, 2*2*80-2        ;последний эл.
	push word ptr [bx]
	mov cx, 80
	mov si, bx
        sub si, 2
	mov di, bx
	std
	rep movsw
	sub bx, 2*80
	pop word ptr [bx];Элемент снизу
        add bx, 2
        push ax
        pop word ptr [bx]
	pop ax
        ret
dblrot endp
end Start

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