CHT510@SATURN.UKC.AC.UK (06/16/91)
Hi, wondered if anyone who has upgraded an Atari STFM with DRAM's could help me. I was planning on putting an extra couple of MEG in over the summer and wondered if it was just as simple as soldering 16 * 1 MEG chips in. I know that the STE is incapable of recognising 2.5 Megs of memory without the aid of 'simmfix'. Is the STFM similarly affected when upgraded with DRAM's ? One last thing. how fast does the access time of the DRAM's have to be. Is 120 ns fast enough or does it need 100ns/80ns ? I would be grateful for any help. -- adam whitham,Eliot College,UKC,Canterbury,Kent,CT2 7NS.UK. CHT510@saturn.ukc.uk.ac
Roger.Sheppard@actrix.gen.nz (Roger Sheppard) (06/17/91)
In article <9106161314.AA15971@lilac.berkeley.edu> CHT510@SATURN.UKC.AC.UK writes: > Hi, > wondered if anyone who has upgraded an Atari STFM with DRAM's could help > me. I was planning on putting an extra couple of MEG in over the summer > and wondered if it was just as simple as soldering 16 * 1 MEG chips in. > I know that the STE is incapable of recognising 2.5 Megs of memory without > the aid of 'simmfix'. Is the STFM similarly affected when upgraded with > DRAM's ? > One last thing. how fast does the access time of the DRAM's have to be. > Is 120 ns fast enough or does it need 100ns/80ns ? > > I would be grateful for any help. > > -- > adam whitham,Eliot College,UKC,Canterbury,Kent,CT2 7NS.UK. > CHT510@saturn.ukc.uk.ac There are no problems in using 2.5 megs on a STFM, also use SIMMS. There is a file at atari archive 2_5ram.zoo, on how to do this, this is by far the better method. You don't need fast rams or simms 150ns or faster, have a look in the UK Computer Shopper for simm prices, from what I remember about 30 pounds for a one meg simms.] I have just upgraded my STFM1040 to 2.5 Megs , but using simm sockets, mounted on vero board, I had to remove the first bank of ram, but I did provide the option to go to 4 megs.. The normal way to do it, is to just stick the simm cards down with double sided tape, plus some wiring and also removing a bank of ram.. -- *** Roger W. Sheppard * Roger.Sheppard@bbs.actrix.gen.nz *** *** 85 Donovan Rd * * At least I don't Flicker, not *** *** Kapiti New Zealand.. * like a dying light globe. ! ***