10 Aug
2005
10 Aug
'05
7:55 a.m.
On Tue, 9 Aug 2005, Tony Duell wrote:
You are going to love this...
I can't find the manual for the bit-banger card (I know I have it
_somewhere_). I did find one of the actual cards, the PCB etch and the
PROMs are copyright 1978.
I also found the manual for the Communication Card you have. It's _also_
copyright 1978, the date on the schematic and source listing in the
manual are 1978 too...
Sounds like the cards were approximately contemporary.
That's perfectly reasonable. It could be that the Serial card was meant
for local interfacing to serial peripherals while the Communications card
was meant for "high-speed" telecommunications applications.
I'll try to remember to check my manuals later today and see if each
manual indicates the intended use of each card.
--
Sellam Ismail Vintage Computer Festival
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So what is suprising that the Apple 'went
backwards' from a card with
hardware serial conversion to a bit-banger.
Maybe they didn't? What's the copyright date in the Apple Serial Card
manual? I'll check the one in the Communications Card manual.