From dadb382c0f79465a561ba53b64ed24472c5f6900 Mon Sep 17 00:00:00 2001 From: Eleni Maria Stea Date: Tue, 5 Jan 2021 21:16:16 +0200 Subject: [PATCH] lovebug moves from bottom to top --- bb.asm | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/bb.asm b/bb.asm index 4eb536e..c28880e 100644 --- a/bb.asm +++ b/bb.asm @@ -175,7 +175,17 @@ main_loop: jnz .static_loop ; draw lovebug - mov di, 32000 + mov di, (200 - 32) * 320 + 160 - 16 + mov ax, [num_frames] + mov bx, ax + shl ax, 8 + shl bx, 6 + add ax, bx + sub di, ax + call rand + and ax, 3 ; random value in 0, 15 + sub ax, 1 ; random value in -3, 12 + add di, ax mov si, lovebug call blit32 @@ -201,12 +211,15 @@ main_loop: pop es inc word [num_frames] + cmp word [num_frames], 200 - 32 + jz .end in al, 64h ; 60h = keyb data port, 64h = keyb status port and al, 1 ; 1 = OUTBUF_FULL = the keyb controller out buf is full jz main_loop ; no key pressed, loop back in al, 60h ; reads the keyb that was pressed to reset the flag +.end: ; re-enable all interrupts sti -- 1.7.10.4