[sdiy] 6850 acia

[Magnus Danielson]

From: greg montalbano <greg.montalbano at ucop.edu>
Subject: [sdiy] 6850 acia
Date: Thu, 15 Aug 2002 08:55:06 -0700

> Hello--
> anybody here have experience with these?  I've been all over the usual 
> websites, trying to find data sheets -- I need to know:
> 
> 1)  what's the difference between 6850, 68a50 and 68b50?

Clockspeeds. 1 MHz, 1.5 MHz and 2.0 MHz if I recall. I have datasheets around
if ya' need to know for sure (just too lazy to dig them up right now).

> 2)  is it possible for the receive portion of the chip to work, while the 
> transmit portion is buggered?

Yes. They are almost completely isolated.

The 6850 is a damn "stupid" UART, but it is nice since it does its little thing
pretty well without too much bother to get it there. I think one should study
it before looking at more complex brothers and sisters, kind of "learn the
basics".

Cheers,
Magnus