12 Apr
2001
12 Apr
'01
3:23 p.m.
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(a)yahoo.com>
To: <classiccmp(a)classiccmp.org>
Sent: Thursday, April 12, 2001 2:43 PM
Subject: COM5025 (was Re: Heath/Zenith stuff)
--- Tony Duell <ard(a)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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