5 Jan
2007
5 Jan
'07
3:34 p.m.
On 1/5/07, Jay West <jwest at classiccmp.org> wrote:
I'd yank all those 64K cards and just run with one
256kw board, keeping the
2nd 256kw board for spare. All those "little" 64k boards just suck up power
and don't give you much extra memory. I generally don't run things that
would require more than a pittance of ram anyways.... so others here will
certainly disagree with me on this point.
Extra RAM is always good for making the self-test count higher on the
blinkenlights. :-)
I just recognized the "unknown" board at the
top in slot 25, it's a PSI
(Programmable Serial Interface) board (built on a 5180-1953). I think that's
a 3rd party board. I would like more info on these boards if anyone has it.
Sketchy info follows that may only be half-accurate: There are four Z80's?
on board as I recall, and 3 proms to dump your z80 code in to.
That sounded similar to what I remembered about the 12792 8-Channel
Mux, but I just looked at the manual and it has a single Z80, DMA,
CTC, 4 SIO/2s, and 16K of DRAM. I wonder if there is anything
interesting you could do with those with your own firmware.
Warren... I'll gladly trade some of my HP boards
in exchange for one or two
of the microcircuit boards in there ;)
I have a few 12566 boards and some relay boards, forget their number.
I have looked for those 9 pin power supply connectors
too, to no avail :( I'd love to find some of the new crimp pins at least!!
AMP doesn't seem to remember making them.
I'd like to make a real plug for the battery backup 820ohm thermistor
bypass. I just have a resistor with its legs folded over wedged into
the connector for now.
-Glen