Posted By
Csabo
on 2025-04-22
08:00:55
|  Re: Free RAM $0100 - $1000
If you're not using the KERNAL, you may freely use all the RAM from $0002 - $1000 for any purpose: code, data, graphics, etc. ($00 and $01 are I/O registers, $0100-$01FF is the stack, but otherwise usable.)
When you said "starting from $0400", just to clarify, changing the character screen location via $FF14 allows any $0800 page boundary. So if you set $FF14 to $00, the screen will be from $0000-$07FF (colors from $0000-$03FF, chars from $0400-$07ff).
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