30 Apr
2009
30 Apr
'09
6:25 p.m.
On Thu, Apr 30, 2009 at 1:47 PM, Alexandre Souza
<alexandre-listas at e-secure.com.br> wrote:
If I'm going to go to that much work, I might as well get another one
of these...
http://freenet-homepage.de/x1541/hardware/petram.html
(I already have two, and they are *great*!)
I just thought that a socket-based chip replacement would be trivial
to build - a few seconds each, really (heat the pin, pop it out, stack
two sockets... repeat). If there's a one-wire jumper from somewhere,
that's still not too onerous to install. Simpler than the work to
wire up a perfboard, plus I have *lots* of 4164s and only a few 4464s
in my junkbox.
-ethan
I also have a
PET 4016 with the punched-out holes in the upper 16K
region of the board - I don't mind stringing wires to rebuild the
sockets, but that seems like a great candidate for hacking the power
to the RAM field. ?Also, it would be easier to drive a naked dynamic
PET board from a bench supply if it didn't need -5V.
? I'd use a pair of 4464's in a smal perfoboard. BTW I have two apple ][+
I'm planning in doing just this mod.