IF you have a date code, I can check the databooks I have.
I've never seen a 48-pin version of this part. It would be odd, indeed, if it
lined up with the AMD 7990.
Dick
----- Original Message -----
From: "Ethan Dicks" <ethan_dicks_at_yahoo.com>
To: <classiccmp_at_classiccmp.org>
Sent: Thursday, April 12, 2001 2:43 PM
Subject: COM5025 (was Re: Heath/Zenith stuff)
>
> --- Tony Duell <ard_at_p850ug1.demon.co.uk> wrote:
> > Incidentally, does anyone have a pinout for the 48 pin version of the
> > COM5025? Yes, it seems to have existed, and the pinout is somewhat
> > similar to the 7990 ethernet chip (!), to the extent that I have a
> > bridge/router with 3 48 pin sockets that can take either 7990s or 5025s
> > (there is one jumper to move for each socket, depending on what chip
> > you've fitted). If you put a 7990 in the socket, you link a header
> > alongside it to an little PCB with the AUI interface stuff on it. If you
> > have the 5025, you connect the header to a differnt board with RS232-like
> > buffers on it. But things like the data pins, etc, must be in the same
> > places on both chips.
>
> Wow! That's strange. Nope... I have tubes and tubes of 40-pin COM5025
> chips, but never even heard of a 48-pin version. The bus-side should be
> easy to divine, but I have no idea about the serial side.
>
> -ethan
>
>
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Received on Thu Apr 12 2001 - 19:23:06 BST