20 Aug
2006
20 Aug
'06
9:08 p.m.
From: "Chuck Guzis" <cclist at
sydex.com>
Reply-To: "General Discussion: On-Topic and Off-Topic
Posts"<cctalk at classiccmp.org>
To: cctalk at classiccmp.org
Subject: Re: data sheet for com5025
Date: Sun, 20 Aug 2006 11:57:03 -0700
On 8/20/2006 at 2:34 PM Dave McGuire wrote:
Hi Chuck
I just checked schematic I have and the MK5025 isn't the same. The part
I have is a 40 pin part, not 48 :(
Being compatable with the 2652 might be right after all. Even though used in
a 8 bit machine, the schematic shows d0-d15. I'll have to look at things
a little more.
The part is used on a floppy controller for hard sectored double density
floppies.
It is a little unusual but that is what it is used for. I've not been able
to
get firmware for it yet so I've been thinking of writing something my self.
I have some prerecoreded DD floppies to read from. I suspect it takes
advantage of the various packet features, like CRC.
Dwight
The COM5025 is mostly compatible with the 2652,
but not completely.
Both are 16-bit parts. I have info about it in a book here...My
scanner is having problems so I can't scan it, but I can type stuff up
from the book if you need it. Let me know.
Isn't the Mostek MK5025 a compatible part? IIRC, it can be used on either
an 8 or 16 bit bus.
http://www.tranzistoare.ro/datasheets/restul/502155_DS.pdf
I've also got the 7990 Lance datasheets in printed form, which is
supposedly also compatible.
Cheers,
Chuck