miker@shamu.WV.TEK.COM (Mike Reiney) (08/08/90)
I bought a Commodore model 1700 ram expander for the C128. Somebody took all the rams out of it. Now I know what "buyer beware" means. What type of rams should I plug into it? I have no documentation at all. How is it enabled? thanks, miker
slogan@ms.uky.edu (Stan Logan) (08/09/90)
If you want it to be strictly a 128K REU, use 16 64Kbit chips (4164?). If you want it to be a 256K REU, use 8 256Kbit chips (41256). If you want it to be a 512K REU, use 16 256Kbit chips (41256). Stan
css@anomaly.sbs.com (Christopher S. Shikashio) (08/15/90)
in article <6413@shamu.WV.TEK.COM>, miker@shamu.WV.TEK.COM (Mike Reiney) says: > > I bought a Commodore model 1700 ram expander for the C128. > Somebody took all the rams out of it. Now I know what "buyer > beware" means. > What type of rams should I plug into it? > I have no documentation at all. How is it enabled? > thanks, miker I think you use a 64k addressing DRAM chips, but you go for a 256 k expansion I am not sure of the chip name for 1700's but the 1764 contians 41256's at 150 ns.. and if you decide to buy 16 of them, you will have a 1750 (but don't forget to cut the 512k jumper on the bottom of the REU brd.. solder side.