7201 (was Re: Z8530 (was Re: Navtel 9460 ProtocolAnalyzerinfo?))

[Allison]

>
>Subject: Re: 7201 (was Re: Z8530 (was Re: Navtel 9460 ProtocolAnalyzerinfo?))
>   From: woodelf <bfranchuk at jetnet.ab.ca>

>Has anybody made a easy to use serial chip, all seem to be lacking some 
>feature?
>The only way I like to program is I/O is  'hardware" setup ... Dip 
>switches and hard reset
>lines. :)

What you want then is a MITS SIO-B. Has a COM2502. That generation of 
chips trade extreme simplicity for dip switches and loads of support 
chips.

When I build and use serial I look at a few things:

  Chip count < the fewer I have to wirewrap the better>
  Functions I want <Vs gobs of unused features>
  Availability (are they in my stock)
  
Usually I end up with 8253 countertimer as BRG and 8251, or 8250.
Though the 6850 is friendly enough.  I also have others to pick 
from like 6850, 7201, Z80SIO, 2681 and others.


Allison