Schematic of a GM ALDL -> PC converter

[Darrell Norquay]

At 10:16 AM 11/26/96 CST, you wrote:

Markus Strobl <eusmsrt at exu.ericsson.se> Wrote:
 
>| Does anyone have a schematic of a GM late model ALDL to 
>| PC converter? By late model I mean the late 80s/90s
>| 8192 baud ALDL.
 
Steve Ravet wrote:

>The Diacom software uses the parallel port to watch the serial data pin of 
>the ALDL.  It implements a UART in software.  It does have timing problems, 

Seems to me these guys are going about this all wrong.  The 68HC11 has a mode 
where it's serial port talks at 8192 baud.  I'm pretty sure GM EMU's are 
68HC11 based, thus the oddball baud rate.  In the words of the prophets, you
need a lawyer to talk to a lawyer.  It would be a simple matter to setup a 
small 'HC11 module to either log the data, display it, or both.  You could
add a second UART to the 'HC11 and just use it as a buffered baud rate 
converter to talk to a laptop.

regards
dn
dnorquay at iul-ccs.com