davecl@orca.UUCP (Dave Clemans) (09/25/85)
Attached are a couple more messages on Atari 520 memory
expansion from the Compuserve Atari Sig.
dgc
**** Start of attached messages ****
#: 126456 S5/ST Software
24-Sep-85 09:45:01
Sb: #126302-#ST memory expansion
Fm: Alex Leavens 74206,1074
To: ALAN PAGE 72227,3507 (X)
Alan:
Still looks to be about 3 or 4 weeks away. We're changing the design so
that you don't have to cut all your chips out of the board. (Whew!) The
reaction we got to that idea was about the same reaction as to a large furry
animal meeting it's maker on your living room carpet... That is to say,
everyone (including us) hated it. But there appears to be a real nice way
around it, which will involve much less modification of your main PC board, as
well as allowing us to lower the price on a fully populated board... Will keep
you informed. --alex
#: 126579 S5/ST Software
24-Sep-85 21:30:25
Sb: #126477-Things
Fm: Alex Leavens 74206,1074
To: Argonaut Sftwre, Jez San 72247,3661
Jez:
At first, it was gonna plug into sockets for all the ram chips, which meant
you were gonna have to cut them out and socket them. You can imagine how well
that went over. The design now is to cut out 2 chips (1 from each bank) and
socket those, so that you get the address lines, and some power and ground.
Other lines will also run for power and ground, as well as the three new lines
for RAS and CAS. You will not have to touch your 68000. (Goodness knows I be
terrified to touch mine!). --alex The board plugs into those two sockets, and
sits above and in back of the current ram...
**** End of attached messages ****