UDG howto

[sirmorris]

I've looked around but I can't find any information on UDG-ifying a zeddy. I'd like to add this capability to at least one of my machines.

Who has UDG capability? Is there a schema anywhere around? Ideally I'd like to retain zxpand compatibility. Is it possible to use the very topmost RAM locations for bitmap data?

C

[Andy Rea]

in simple terms A0 thru A8 of the ram you wish to use for UDG needs to be connected to the ROM side of the address bus. i'm pretty sure you can use any area of ram for character maps (only read during refresh).

Andy