Stepped on PROM dumps

CSH-HQ nacelp at jvlnet.com
Mon Aug 16 09:21:35 GMT 1999


Geeeez, I'm impressed, how anyone catches that stuff is ammasing.
I think there are others floating around with the same error.
Bruce



>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

>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/
>




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