Vss on 165 ecm help!

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Seem to recall 89 had a digitial dash option, might need to research bin 
more.  Digitial dash took different trigger than analog VSS
Grumpy 


>>I have one last thing to solve on my tpi s10 project.  I have a mech
>>operated speedo and the prom is for 89 firebird 350 tpi   (apyu)  It has one
>>wire -Brown for the vss.
>>With the ign on I have 13v nothing connected.  I've tried the optical type
>>but most I find are bunt out and I believe they are only dc pulse.  What do
>>I need to send to the ecm?  What is it looking for in detail.  I have and
>>inline gen. used on my 84 jeep grand wagoneer.  On my fluke meter it reads
>>4v ac.  how can I make this work?   And I am sure I will shoot someone if
>>they start telling me to modify the code of go buy something from JTR. ;-)
>>
>>thanks, Mike R
>>
>>Hi Mike
>
>	In the middle of s-10 project myself. what year is your s-10?. Believe the
>optical unit using a transistor to "ground" the 12v coming from pull up
>resistor in ecm. My pu is using an optical unit for vss.
>
>	Would it be possible to get a copy of bin file?
>
>Vance
>
>PS: my s-10 is a 84 - came mech speedo - wiring diagram indicate the cruse
>control uses a vss signal. still have to check my speedo to see if it will
>accept an optical pickup.
>