Re: Can't identify a card...

[dempson@actrix.gen.nz (David Empson)]

<schema@car.qc.ca> wrote:

>      I found a card in a friend's Apple //e but I don't know what it does...
> 
>      - copyright 1981 by Pure Data and made in Canada
>      - 1.8432 oscillator
>      - a "5 two-positions cursors" dip switche
>      - 25 pins ribon connector
>         (13 "2 pins" blocks with a pin removed at one end)
>      - a 2 pins block
>      - some chips
>         (74LS08, 74LS10, 74LS04, 74LS74, 74LS245,
>         74LS367, 74LS175, 8250, 1489, 2716, "924")

It is obviously a serial card, but it is not one that I am familiar
with.  The 8250 is the original version of the serial chip which is
commonly used in the PC.  The 2716 is an EPROM (holds the firmware for
the card), and the 1489 is an RS-232 receiver chip.  It is odd that
there is no 1488 (RS-232 transmitter).

The rest of the chips provide various logic and buffering functions.  I
don't know what the "924" is.

-- 
David Empson
dempson@actrix.gen.nz
Snail Mail: P.O. Box 27-103, Wellington, New Zealand