11 Jul
2012
11 Jul
'12
7:37 a.m.
On Wed, Jul 11, 2012 at 2:46 PM, Raymond Wiker <rwiker at gmail.com> wrote:
On Wed, Jul 11, 2012 at 1:54 PM, Rob <robert at
irrelevant.com> wrote:
On second thought, I concur. The fingers seem to match the Apple II
slot (power and data lines in the correct positions), so it is very
likely an Apple II card.
Camiel.
On 11 July 2012 12:34, Mark Benson <md.benson
at gmail.com> wrote:
Ah, as I said, I didn't have one to compare. It's a while since I've
been playing with anything with ISA in it.
The apple dad had briefly was, maybe, a IIe - would they be different?
The Zilog 8530 is a serial communications device, and the 1488/1489 are
level shifters that were commonly used for RS232 levels. The header plug
has 2*13 pins, which matches the 25-pin RS232 connectors commonly used back
then. The card appears to have been made in 1987 (from the date codes on
the chips).
So, probably an Apple II serial card, given that the board connector seems
to match the Apple II expansion bus. Did he ever have an Apple II or something of
similar era? My wild stab
in the dark is it's a serial interface card for an Apple II or
similar. Whatever it was didn't have a convention of using PC-Style
backplane brackets but instead had a ribbon cable hung out the back,
which I believe was how some A II were.
Hmm. That's a possibility - he never used an apple, but I know one
passed through his hands a few years ago - it might be this relates to
that, but it got lost at the time.
On 11 July 2012 12:40, Camiel Vanderhoeven <iamcamiel at gmail.com> wrote:
It look a
bit like an ISA card missing it's bracket but I've not got
Not really; an 8-bit ISA card has 62 fingers, this card has 50. It
looks a bit like an Apple II card, but the location of the fingers
used for power looks wrong to me, so it's probably not that either. PM671R is the part number of the DC/DC convertor
(5 v -> 12 v) that
label's on.
Well it was the only obvious label on there! :-)
Rob