On Fri, 18 Sep 1998, [ISO-8859-1] Marko Mäkelä wrote: > On Fri, 18 Sep 1998, Henry Sopko wrote: > > > Does anyone know the what speed a eprom must be for it to work in the > > C64? I have two eproms that are 350 ns, and fail in my C64. > > The slowest DRAMs I've seen in a C64 are 300 ns. > > > They do okay in my VIC-20. Is it the speed? > > It shouldn't be, since (in the case of NTSC) both machines run at the same > clock speed. But on the other hand, the VIC-20 has some buffer chips on > the bus that the C64 doesn't have. Maybe that is why they work okay in the VIC-20 and not in the C64. > But why don't you use a normal 2764 or 27128 EPROM? The pinout is not > that much different. BTW, does anyone know where one could buy nicely > built 2764->2364 adapter sockets? Yes, I could use the 28 pin eproms you mentioned above with a little work, but I wanted to do a easy replacement of the 24 pin type. Henry - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail firstname.lastname@example.org.
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