\Fast page mode RAM is fast page mode ram, no matter where it's put (i.e. in your stock c64, on a 30pin simm, 72pin etc). Using a 256k 30pin simm should be real easy. just act like its an 8-bit-wide dram and hook accordingly EDO can also be used exactly like fast page mode mem as far as the c64's concerned. its when SDRAM comes to that gets things interesting ;) Refreshing most 256k chips/simms, by the way, is exteremely simple. All you have to do is flash CAS (or Ras? cant remembr) alone, and it'll refresh the correct row, and update the counter accordingly (one that's INCIDE the ram) Gawd, I cant type today. :) -David On Thu, 18 Jan 101 g.baltissen@hccnet.nl wrote: > Hallo, > > I've expanded some C64's and C128's by replacing the original 4164 by > 41256's. But I have some 30 pin 256 KB and 1 MB and even some loose 72 pin > 4 and 8MB modules laying around. Who has experience in connecting these to > a C=? The problem is that I have no idea if the refresh used for the > 4164/41256 is good enough for the bigger RAMs. I can imagine that they need > more addresslines to used during a refreshcycle. > > -- > Groetjes, Ruud > > http://home.hccnet.nl/g.baltissen/index.htm > > > > - > This message was sent through the cbm-hackers mailing list. > To unsubscribe: echo unsubscribe | mail cbm-hackers-request@dot.tml.hut.fi. > - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail cbm-hackers-request@dot.tml.hut.fi.
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