'89 Firebird ECM PROM

[peter paul fenske]

Hi Terry

It is a variant of a 27C128 eprom

That setting will allow you to read it just fine
and also program it..

Good Luck:peter

At 02:02 PM 6/22/97 -0700, you wrote:
>I got a ECM out of a '89 Firebird Trans Am GTA. I pulled the following
>number out of the PROM by looking through the quartz window with a
>microscope:
>
>(M)1984 TI
> 27C128A   ....could be 27C12HH, or some variation of the last two
>digits. 
>
>Question: Is this the right PROM for the ECM that's supposed to be in
>this type of vehicle? I have not found a reference to the numbers that
>would indicate it's a 8051 or 8065, etc. 
>
>Alternatively, can someone confirm the manufacturer and # of the PROM?
>
>Thanks much,
>Terry
>
>