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My game on cartridge?

Posted: Fri Mar 02, 2018 5:26 am
by LoadError
I've seen a video with a reference to a VIC-20 blank cartridge which can host an EPROM, so I thought it'd be cool, just for a laugh, to have my game on a cartridge. What tools would I need to program an EPROM with the game (which is Austrocompiled 16K BASIC code)? Would I need to work on a real VIC or on a PC?

Re: My game on cartridge?

Posted: Sat Mar 03, 2018 5:48 am
by Mike
That would most probably require an 'included' +16K RAM expansion, so the game can run from $1201 onwards and have its work variables somewhere in BLK1 and/or BLK2.

A compressed copy of the game, together with the cartridge autostart procedure fits on an EPROM in BLK5. Upon power-on/reset, the compressed version is copied down into RAM, decompresses itself, and then starts the game.

In any case, you'll have to accustom yourself with machine language to 'build' the EPROM contents. You can look here for an example how I made a cartridge from an own BASIC game. That one actually isn't compiled, but the procedure in your case would be very similar.

Re: My game on cartridge?

Posted: Sat Mar 03, 2018 6:18 am
by LoadError
Thanks! :-)

Re: My game on cartridge?

Posted: Thu Mar 08, 2018 8:21 am
by dragos
sounds like a job for my RAM/ROM cartridge.

Re: My game on cartridge?

Posted: Thu Mar 08, 2018 11:57 am
by eslapion
LoadError wrote:I've seen a video with a reference to a VIC-20 blank cartridge which can host an EPROM, so I thought it'd be cool, just for a laugh, to have my game on a cartridge. What tools would I need to program an EPROM with the game (which is Austrocompiled 16K BASIC code)? Would I need to work on a real VIC or on a PC?
and
Mike wrote:That would most probably require an 'included' +16K RAM expansion, so the game can run from $1201 onwards and have its work variables somewhere in BLK1 and/or BLK2.

A compressed copy of the game, together with the cartridge autostart procedure fits on an EPROM in BLK5. Upon power-on/reset, the compressed version is copied down into RAM, decompresses itself, and then starts the game.
Something like this ?

http://sleepingelephant.com/ipw-web/bul ... f=3&t=8867

There is room for both ROM and RAM on this board.

Re: My game on cartridge?

Posted: Thu Mar 08, 2018 12:25 pm
by LoadError
I've seen a few that might work. I will also need a nice plastic case =)