Know something about this production that we don't?
Last edited on 24 Jun 2020 by 100bit.
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I did this as fun learning exercise, I expect it could be halved in size with better code, but I learnt stuff, so I'm pleased :)
; really basic 256b atari ST 'demo'; coded by spiny / Torment; on 14th June 2020; ; this is my second 'size code' attempt, and the first on the ST ; literally just a tiny logo, tiled on screen :); was totally fun to work out though; run in LOW RES; reset button quits :)
main ; lets go move.w #27,-(sp) ; escape code code move.w #$2,-(sp) ; all this trap #1 ; extra stuff addq.l #4,sp ; just to move.w #'f',-(sp) ; disable the move.w #$2,-(sp) ; flashing cursor trap #1 ; when running addq.l #4,sp ; in TOS mode :) move.w #2,-(a7) ; get physbase trap #14 ; TOS stuff addq.l #2,a7 ; TOS stuff move.l d0,a0 ; a0 points to screen memory add.l #1920,a0 ; move past title bar move #19-1,d2 ; number of lines counterfillscreen ; top loop to do multiple lines move #20-1,d1 ; logos per line counterfillline ; inner loop to do lines move.l #logo,a1 ; a1 points to picture move.l #4,d0 ; logo is five lines high.loop ; local move.l (a1)+,(a0)+ ; move one longword to screen, logo is 16px, so 2 longwords per line? move.l (a1)+,(a0)+ ; move one longword to screen add.l #152,a0 ; next line dbf d0,.loop ; do loop times sub.w #792,a0 ; move a0 backwards for next logo dbf d1,fillline ; loop the logo line counter add.w #1440,a0 ; skip to next line dbf d2,fillscreen ; main loop to fill screenforever ; never quit bra forever ; stay atarilogo incbin COPYB1.IMG ; modify for absolute path