qralph@dna.lth.se (Ralph Haglund) (03/01/91)
Hi - I saw the note about upgrading a 520 to 2.5Mb when it already has an extra .5Mb added. Well... I am a friend of the guy who has the Atari shop in town, and I do the tricky business there. I have spent a few hours on 3-4 machines of that kind, to manually solder in 2 1Mx8 SIMMs in 520s with junk on top of the old chips. Put the CAS of those pigs to +5V, and then testing. No customer has come back with complaints. Just glue the SIMMs with silicon glue somewhere in the box. Ralph
vsnyder@jato.jpl.nasa.gov (Van Snyder) (03/02/91)
In article <1991Mar1.052442.6564@lth.se> qralph@dna.lth.se (Ralph Haglund) writes: >Well... I am a friend of the guy who has the Atari shop in town, and I do >the tricky business there. I have spent a few hours on 3-4 machines of that >kind, to manually solder in 2 1Mx8 SIMMs in 520s with junk on top of the old >chips. Put the CAS of those pigs to +5V, and then testing. No customer has >come back with complaints. Just glue the SIMMs with silicon glue somewhere >in the box. >Ralph Is it possible to post the flavor of SIMM you used, and it's pinout? -- vsnyder@jato.Jpl.Nasa.Gov ames!elroy!jato!vsnyder vsnyder@jato.uucp
bertram@eastman.UUCP (Dudley Bertram) (03/02/91)
In article <1991Mar1.052442.6564@lth.se> qralph@dna.lth.se (Ralph Haglund) writes: >Hi - >I saw the note about upgrading a 520 to 2.5Mb when it already has an extra >.5Mb added. >Well... I am a friend of the guy who has the Atari shop in town, and I do >the tricky business there. I have spent a few hours on 3-4 machines of that >kind, to manually solder in 2 1Mx8 SIMMs in 520s with junk on top of the old >chips. Put the CAS of those pigs to +5V, and then testing. No customer has >come back with complaints. Just glue the SIMMs with silicon glue somewhere >in the box. >Ralph Could you post or mail me more information about how you did this. I have an ST that was upgraded by the piggy-back method and I would like to add more memory if that is possible. Please go to as much detail as you can because I am not a hardware oriented type of person. Thanks. News fodder....... . . . . . . . . . . .