C64 hacking guide: Coding a Key-Press level skip/game ending into a game

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FREEZE64

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Published on September 12, 2017 12:57:25 PM ● Video Link: https://www.youtube.com/watch?v=i1E79igJioA

Duration: 16:29

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This quick video shows you how you can code in a level skip or game ending key-press routine. All you need is a C64 with an Action Replay cartridge.

For this example I have used Sergeant Seymour Robotcop by Codemasters and an ending/level skip code from FREEZE64 fanzine issue 8.

Full cheat codes in FREEZE64 issue 8: www.FREEZE64.co.uk

Code used:
LDA #$7F
STA $DC00
LDA $DC01
CMP #$DF
BNE $
JMP $A91C
LDA $DC01
RTS

In Sergeant Seymour:
Spare Memory @ $AD90
Hijack $DC01 from $1741
Game ending @ $A91C
Level Skip @ $7533