Delco data link

[John Hess]

Sorry for the post to the group rather than the original writer;  but, 
I missed the original and want to get back with the one who has this 
data.  If you have a schematic that will work with an '86 Corvette and 
know the data positions, I would sure like to talk to you about it.

John Hess
johnh at ixc-comm.net

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From:  Wade T. Braden[SMTP:wbraden at ryker.itech.cup.edu]
Sent:  Wednesday, February 26, 1997 9:03 PM
To:  diy_efi at coulomb.eng.ohio-state.edu
Subject:  re:Delco data link

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.

        Please do. I have some for my 87' Firbird Formula that I just 
posted.

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	Wade T. Braden       Email:  wbraden at ryker.itech.cup.edu
        408 Burton Ave.      Web:  http://www.itech.cup.edu/~wbraden/ 
      Washington, PA 15301   Major:  Electrical Engineering Tecnology	 
        (412)222-8964    	      at California University of PA
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