MITS 2SIO serial chip?

From: ajp166 <ajp166_at_bellatlantic.net>
Date: Sun Dec 16 18:28:07 2001

A newer chip that can still be found is the WD37C65
that will do 125ns easily. Or you could easily find a d765
off an old board or NOS from JDR.

Allison

-----Original Message-----
From: Ben Franchuk <bfranchuk_at_jetnet.ab.ca>
To: classiccmp_at_classiccmp.org <classiccmp_at_classiccmp.org>
Date: Sunday, December 16, 2001 5:55 PM
Subject: Re: MITS 2SIO serial chip?


>If you must know it is a floppy disk controller I need. Right now
>I plan to use WD2797 floppy disk controller. I would love to use
>a newer chip,but I can't find any! I want to stay with DIP's and PLCC's
>here. This may be the 21 century but my soldering skills are the 19'th.


>I still favor the simple dumb uart chip. TR1602?. I like things than
>you hit reset, it starts ... not like the classic star-trek computers
that
>always go down. Usually when you need them.


It's an OK part but you could use the 8251 with fewer supporting
parts and two less voltages (com2502 is single voltage).

I've built enough to enjoy later parts as I'm old enough to want
it done in a lifetime and the older parts meant tons more support
parts and the requisite connections. Of the latter, the fewer the
better for both buildability and reliability.

Allison
Received on Sun Dec 16 2001 - 18:28:07 GMT