bediako@cs.buffalo.edu (Bernard Bediako) (10/10/89)
Can anyone tell give any recommendations on the best solderless ram upgrade kits? Right now I'm heading toward the EZ ram II. I need to know any comments/problems there are with it. Also, does it matter what speed (ns) chips I use? Will there be any problems using 100 or 80ns chips? Will things speed up if I use 80ns chips? (I'm planning on using 1M * 1 chips). thanks bernie bediako@cs.buffalo.edu Bernard Bediako --------=-=-=-=-=-> DOMAIN: bediako@cs.buffalo.edu
krieg@jupiter.uucp (Andrew Krieg) (10/10/89)
In article <11562@eerie.acsu.Buffalo.EDU>, bediako@cs.buffalo.edu (Bernard Bediako) writes: > > Can anyone tell give any recommendations on the best solderless ram > upgrade kits? Right now I'm heading toward the EZ ram II. I need to know > any comments/problems there are with it. > Also, does it matter what speed (ns) chips I use? Will there be any > problems using 100 or 80ns chips? Will things speed up if I use 80ns chips? > (I'm planning on using 1M * 1 chips). I bought an EZ Ram II about 2 years ago. They had just changed the board design and it didn't work when I received it. I had to return it twice before I got one that worked. They did refund all of my shipping charges. Since then it has been working great. I started with the 256K bit chips and just recently bought the 1M bit chips. Still running strong, never misbehaves. The ST can't make use of any speed increase in chips above 150 ns. EZ Ram II recommends 120ns chips however. I bought 100 ns ones, mainly because they are more reliable (and durn cheap now!). Not many places carry the 120ns 1M chips, and the 100ns ones are usually only a quarter or so more a piece. It's great to have a 2.5 Meg machine :^) Now a question of my own. Could I use my 256K bit chips I replaced in one of those cartridge RAM expanders every one is talking about on this board? Would I be able to have 3 Meg? Or won't it work with another expansion already in place? If it would work, how much are those carts with no RAM? ========================================================================= = = = The Atari Addict A. Krieg = = = = G.E. Medical Systems - CT - New Berlin, WI = = USENET: krieg@jupiter.med.ge.com = = = =========================================================================
dmk@cbnewsi.ATT.COM (daniel.m.kuster..jr) (10/18/89)
I currently have a standard 520ST that I would like to upgrade to 2.5 Meg (I already have the 16 1 Meg chips). Could someone please summarize the hardware changes required to convert a stock 520ST to 2.5 Meg? I have build hardware projects before and would rather do the modifications myself. Besides, the RAM chips I have are surface mount, not DIP, so they wont work with any of the RAM boards that I know of. Thanks in advance, dan k.