On Mon, 25 Oct 1999, [ISO-8859-1] Marko Mäkelä wrote: > Wasn't this discussed a few months ago here? Someone was going to compose > a list of the addresses. Maybe Richard Atkinson? Anyway, the REU > occupies $df00-$df0a or so, and there are mirrors at $df10,... (or maybe > it was $df20; I don't have the REU at hand right now). I modified one REU > so that it can coexist with an Action Replay cart (which uses $de00-$deff > for one 7-bit write-only register and $df00-$dfff for ROM or RAM). The > modification was a 3-position switch that would choose the REU registers > to be read/write, write-only or completely disabled. In write-only mode, > detecting the REU reliably is impossible, and not many programs are likely > to work in that mode. But prlink does work. :-) If it is mirrored throughout the entire address range maybe the $DE page would be a better selection? I don't want to mess with the REU. I know from the past that the SL cartridge is not fully decoded either and it is mirrored through the $DE page. It isn't that important to me, I can fix it or make a better UART cartridge. Does anything else use the $DE area? Where does the RAMLink fit into all of this? > Maybe they are afraid of people making clones? :-) Or they want to be the only ones making compatible hardware? - Mike Naberezny (email@example.com) http://www.6502.org - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail firstname.lastname@example.org.
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