MITS 2SIO serial chip?

From: Ben Franchuk <bfranchuk_at_jetnet.ab.ca>
Date: Sun Dec 16 17:58:30 2001

ajp166 wrote:
>
> 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.

The floppy disk chips have arrived in the post friday. I hope to get
a chance to pick them monday.I will keep the WD37C65 in mind but
"A bird in the hand is worth two in the bush.". I have added wait
states internally for I/O.
 
> Allison
 
> 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.

Well I managed to stick my serial uart in the FPGA. One good feature
of 'dumb' hardware is that they can be used for bootstrapping the cpu.
(Mind you you still need a rather big prom to boot the FPGA but that
is another story)
-- 
Ben Franchuk --- Pre-historic Cpu's -- 
www.jetnet.ab.ca/users/bfranchuk/index.html
Received on Sun Dec 16 2001 - 17:58:30 GMT

This archive was generated by hypermail 2.3.0 : Fri Oct 10 2014 - 23:33:40 BST