11 Jun
2013
11 Jun
'13
11:54 a.m.
On Jun 11, 2013, at 1:40 PM, Paul Hagstrom <hagstrom at bu.edu> wrote:
On Jun 11, 2013, at 9:05 AM, Alexandre Souza <alexandre.tabajara at gmail.com>
wrote:
As far as I can see, that's just on one bank of RAM, which is perfectly sensible,
those would have been added later, the sockets would have been empty initially. The
datecodes everywhere else are just what you'd expect. The Applesoft/AutoStart ROM
chips were swapped in at some point and it doesn't appear that the originals were
saved (probably would have gone into a language card which would have been the source of
the AutoStart ROM chips), but it's not an insurmountable challenge to find
period-accurate replacements if the new owner wants to downgrade back down to the original
state.
Well, it's one chip in one bank and 7 of 8 chips in another. A
perfectly reasonable repair to have done, since 4116s seem to die
like it's their job and older ones (like the ceramic ones) are
generally not found alive, but it does mess with the aesthetics a
tiny bit.
It's only really of any import if you're trying to use it as a
display piece, anyway, which is generally a sad state for these
machines to end up in anyway. :-)
- Dave
Obviously
not unmodified; a number of the original ceramic 4116s have
been replaced with plastic ones. Nice white ceramic 6502, though.
The datecode of the chips are 8332, 32nd week of 1983...