Search found 2 matches

by cmjrd2k
Sun Mar 25, 2018 10:04 pm
Forum: Megadrive/Genesis
Topic: M68K and Genesis VDP cheat sheets now available
Replies: 4
Views: 4981

Re: M68K and Genesis VDP cheat sheets now available

The 8/16/32 is there to show the cycle counts at different bit-widths. It also shows when instructions are unsupported at different bit-widths, by including a "--" in the appropriate column. There probably is a simpler way to explain how the cycle counts work, but I think there are too many exceptio...
by cmjrd2k
Sun Mar 18, 2018 12:47 am
Forum: Megadrive/Genesis
Topic: M68K and Genesis VDP cheat sheets now available
Replies: 4
Views: 4981

M68K and Genesis VDP cheat sheets now available

Hi all, I'm new here and pretty much a newbie to programming on the Genesis /Mega Drive. Two of the biggest hurdles have been for me so far: 68000 programming, and making sense of all the different VDP registers. I couldn't really find anything that brought that information together in a tiny, compa...