Made for DOS/DOSBox. Compile via NASM: nasm -f bin -o anim.com anim.asm
FRUIT TEA PUBLIC LICENSE (FTPL)
@lea_rosema made this. You can do whatever you want with it. If we meet some day, and you think this stuff is worth it, you can buy me a fruit tea in return.
| org 100h | |
| section .text | |
| init_gfx: mov ax,13h | |
| int 10h | |
| mov di,0a000h | |
| mov es,di | |
| start: xor di,di ; pixel offset | |
| xor bx,bx ; x position | |
| xor cx,cx ; y position | |
| call ticks ; dx=tick count (initially 0) | |
| pixel: xor ax,ax | |
| sub ax,04567h | |
| sub ax,dx | |
| add ax,bx | |
| add ax,cx | |
| imul ax,ax | |
| mov si,bx | |
| imul bx,cx | |
| sub ax,bx | |
| sub ax,bx | |
| mov bx,si | |
| shr ax,8 | |
| add ax,dx | |
| mov [es:di+bx],al | |
| inc bx ; increment x counter | |
| cmp bx,320 | |
| jnz pixel | |
| add di,bx | |
| xor bx,bx ; reset x counter | |
| inc cx ; increment y counter | |
| cmp cx,200 | |
| jnz pixel | |
| mov ah,01 | |
| int 16h | |
| jz start | |
| mov ah,0 | |
| int 16h | |
| cmp al,27 ; unless escape pressed | |
| jnz start ; go to next frame | |
| quit: mov ax,3 | |
| int 10h | |
| int 20h | |
| ticks: ; returns DX=Tickcount | |
| push es | |
| push cx | |
| mov cx,[initialTime] | |
| push 40h | |
| pop es | |
| mov dx,[es:6ch] | |
| cmp cx,0 | |
| jnz ticks_1 | |
| mov cx,dx | |
| mov [initialTime],cx | |
| ticks_1: sub dx,cx | |
| pop cx | |
| pop es | |
| ret | |
| section .data | |
| initialTime: dw 0 | |
| section .bss |