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Subjecthaw - nice coincidence Reply to this message
Posted bynewsdee
Posted on02/08/05 09:04 PM



> Hmm, coincidentally again, i wrote a 6502 cpu core a few days ago, and found > it to be pretty easy. It only has fiftysomething official opcodes.

Heheh how about that. I agree, it doesn't seem much more complex once you write something to handle the variable addressing (I guess; I didn't start writing yet).

> I'd go for the AppleII if i were you, since you can test effects
> on the original machine (or doesn't it have some sort of built-in Basic/ASM?)

Actually the other reason I'm thinking of the AppleII is that its display is monochrome. It had color but it was some kind of trick (e.g. 0101 -> 2 red pixels, 1010 -> 2 purple pixels). So I think I can just do everything monochrome at first then worry about the rest. The only bottleneck would be handling the resolution.

So I guess I should first attempt to have a moderately fast updating monochrome screen of the dimensions of the Apple ][ screens (this is a no brainer with most languages, just Flash sucks for this).




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Entire Thread
Subject  Posted byPosted On
*making a 6502 emu: port or write from scratch, and which system first?  newsdee02/06/05 11:02 PM
.*Re: making a 6502 emu: port or write from scratch, and which system first?  Jonemaan02/08/05 08:56 AM
...haw - nice coincidence  newsdee02/08/05 09:04 PM
.*Re: making a 6502 emu: port or write from scratch, and which system first?  finaldave02/07/05 09:21 AM
.*Re: making a 6502 emu: port or write from scratch, and which system first?  smf02/07/05 03:03 AM
..*Re: making a 6502 emu  R. Belmont02/07/05 04:50 PM
...*Super Breakout info?  CabaretVoltaire03/09/05 03:13 PM
...*Re: making a 6502 emu  smf02/09/05 01:33 PM
...*atari arcade  newsdee02/07/05 09:58 PM
....*Re: atari arcade  Alphasys02/26/08 01:45 PM