Stepped on PROM dumps

[Shannen Durphey]

Two of thos files came from my reader.  I think at least one more of
mine is bad.  I'll check during the day.
Shannen
Carl Summers wrote:
> 
> Wow Ludis,,,great catch.....I imagine there could be some very frustrated people out there that have tried to use that.......great work
> -Carl Summers
> 
> mailto:intech at writeme.com
> Click on the above link to respond privately.
> 
> -----Original Message-----
> From:   Ludis Langens [SMTP:ludis at cruzers.com]
> Sent:   Sunday, August 15, 1999 11:52 PM
> To:     gmecm
> Subject:        Stepped on PROM dumps
> 
> The following five '7747 PROM dumps from the diy_efi web site each have
> one trashed byte:
>  anlz5483  Aksn  Akal  azft9503  asdz9578
> 
> The last byte of each dump is supposed to be 0x96.  In these five cases,
> it is 0x00.  Fixing this byte makes the sumcheck come out correct.
> 
> The 0x96 is a LDAA opcode in the INTegrator fuel adjustment function.
> If this byte is not fixed (but the sumcheck is), the ECM will keep
> pulling out fuel as if the INT has gone all the way to zero.
> 
> --
> Ludis Langens                               ludis (at) cruzers (dot) com
> Mac, Fiero, & engine controller goodies:  http://www.cruzers.com/~ludis/