68230 Datasheet?

From: Gooijen H <GOOI_at_oce.nl>
Date: Wed Feb 23 07:48:35 2005

Yes, you can define each pin separately to act as output or as
input. In that respect the 68230 is identical to the 6821 PIA.
The Core and I/O board can support bi-directional pins, with a
patch. I needed that functionality to connect an IDE disk drive!
See www.pdp-11.nl and click the link "Homebrew PDP-8".
AFAIK the 68230 is described in the old Motorola handbook I have
at home. If nobody has a scan available, I could make a few of
the relevant pages. Let me know.

- Henk, PA8PDP.


> Anyone have a 68230 datasheet somewhere they can send me or
> refer me to?
>
> Based on what I can find on the web, am I correct in assuming
> that I can use it as a 16-bit port with per-pin programmable
> direction? I.e., have port A bits 1, 3, 5, 6, 7 as inputs,
> bits 0, 2, and 4 as outputs, and similar bit-level control
> for port B?
>
> I have 59 of these devices in case anyone needs a few :-)
>
> I'm planning on building an automated DEC flip-chip card
> tester, but really wanted something that's pin-programmable,
> so I could just jam in a board, tell the software that it's
> an M220, and have it get tested...
>
> Cheers,
> -RK
>
> --
> Robert Krten, PARSE Software Devices +1 613 599 8316.
> Realtime Systems Architecture, Consulting, Books and Training
> at www.parse.com
> Looking for Digital Equipment Corp. PDP-1 through PDP-15
> minicomputers!
Received on Wed Feb 23 2005 - 07:48:35 GMT