Delco data link

[Chief]

At 11:12 AM 2/26/97 -0800, you wrote:
>You say you have a P4 but your description fits the C3. I am just
>finishing a PC project like yours specific to the Fiero with a C3 and
>can make several comments:
>1. The PC cannot directly read the bit string either with a serial port
>or the printer port (at least not with DOS running). The ratio of pulse
>widths is not compatible with the serial format. Because of the
>interrupt system you will lose bits from the printer port. I can supply
>a simple circuit to read, buffer, and supply the bit string to a printer
>port if anyone is interested.
>2.Each engine series (and there are further variations) has its own data
>string with byte positions and significance being different. This means
>forinstance that the MAT byte may be in a different place in the string
>and use a different conversion from hex 00-FF to degrees C/F. I can
>supply some of these for pre-88 GM cars.
>
>

I am also very interested in using a laptop to read the ECM data.

I have an 84 Monte Carlo SS carbureted.  

Is there any freeware that will work or should you just roll up your sleeves
and program?

Chief
Gainesville, FL