Hello, * On Wed, Jan 14, 2015 at 11:18:00AM +0100 Marc 'BlackJack' Rintsch wrote: > On 14/01/15 07:09, Andreas Koch wrote: > > Any chance to support the GeoRAM/NeoRam and/or REU on the C64? > > REU ist not ”banked” memory. To ”bank in” another code segment would > need to *copy* the code from REU into the C64 RAM. This is done via DMA > so it is fast compared to copying with 6510 code, but still very slow > compared to bank switching hardware. That's true. Nevertheless, it is usable. ;) I used this approach for writing my "TS-DOS" hobby project approximately 25 years ago. I tried to mimic the API of MS-DOS. I even went so far as to mimic the segment + offset addressing. Here, the segment was used as an index into the REU. This way, I was able to have almost all of 512 KB for TS-DOS, in segments of 16 KB. Unfortunately, this disk I wrote this on broke before I made a copy of it. Thus, all of it as well as the documentation is long gone... :( Regards, Spiro. -- Spiro R. Trikaliotis http://www.trikaliotis.net/ ---------------------------------------------------------------------- To unsubscribe from the list send mail to majordomo@musoftware.de with the string "unsubscribe cc65" in the body(!) of the mail.Received on Wed Jan 14 20:28:28 2015
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