newbie here, gotta few questions

[peter paul fenske]

Hi Matt

first off check the archives for info I ve posted.

There is softwaree, a C language listing and a interface schematic

Which ecm are you using. the 165 or the 730. The stuff I posted
pertains to the 730.

The 165 P4 is a bit of a bear because it wants to use 160
baud.

You have to send a 80 57 01 header to get it to send at
8192 baud but only when it has ended a 160 baud frame.

Anyways good luck:peter

At 07:43 PM 6/15/97 -0400, you wrote:
>Hey all!!  I just subscribed today, so Hello all!
>
>I gotta few questions.  First I'm dealing with a GM P4 in an 88' s-10
>blazer.  I've been trying now for the last few days to figure out what the
>speed and contents of the serial stream is/are coming from the truck's
>computer.  I need to know what baud rate, and the general structure of this
>stream is, anyone know?
>
>I don't have access to an o-scope, just an old analog multimeter and my 386
>laptop.  I can receive data from the truck to my laptop, but the program I
>wrote has to initialize the serial port for a certain speed.  It seems that
>if I run the port at 600bps, I can get some repeatable numbers.  heck, I
>don't even know if I'm going at this correctly at alll!!!!
>
>help~! anyone?
>
>-Matt Teagarden
>
>-
>
>   (-/---------------------\    |
>    / |         |  |       |\   |
>   /  |_________|  |_______| \__|________
>  |     ____                    ____     |
>  |    /    \    Chevrolet     /    \    |
> [|___/  OO  \________________/  00  \___|]
>        0000                    0000
>         00                      00 
>Matt Teagarden   Blazer40 at cobweb.net
>Pittsburgh, PA   Http://www.cobweb.net/~blazer40
>1985 406V8 S-Blazer     
>
>