Subject: [stella] Ballblazer Demo Subroutines From: Manuel Polik <cybergoth@xxxxxxxx> Date: Wed, 25 Sep 2002 09:07:06 +0200 |
Hi Rob! If you ever consider to continue your work on the Ballblazer thing, consider using these: ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ; RotateLeft ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; RotateLeft: CLC ROR PF2Data ROL PF1Data ROR PF0Data LDA PF0Data AND #$08 BEQ Ok2 LDA PF2Data ORA #$80 STA PF2Data Ok2 RTS ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ; RotateRight ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; RotateRight: CLC ROL PF0Data ROR PF1Data ROL PF2Data BCC Ok LDA PF0Data ORA #$10 STA PF0Data Ok RTS :-) Greetings, Manuel -- Brandnew Atari 2600 VCS game: http://home.arcor.de/cybergoth/xype/gunfight2600.html The Epyx Shrine: http://home.arcor.de/cybergoth ---------------------------------------------------------------------------------------------- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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