ECU's

Mon Jan 3 23:13:00 GMT 2000

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Hi List,  =20
Is there an ECU out there somewhere that I can plumb into my '1600cc =
1987 Toyota MR2 Supercharged.
I would like MAP as opposed to AFM it currently has, 4 cyl sequential =
injection and possibly 2 or 4 coil ignition.  The main thing is =
availability of aftermarket utilities to modify / customize my ECU.
The current ECU has an 8051 derivative I'm told, and tables are onboard =
and so can't be modified.  I know this is possibly a stupid question but =
does anybody have or know how to obtain the code from this ECU.  I had =
to try, but Toyota weren't helpful.
I'm guessing with certainty that various lock bits on the ECU's 8051 MCU =
are set. Is there any 'secret' method for dumping the code out of such =
chips ?  How about executing external code (via /EA pin) that is a jump, =
then toggling the /EA pin at this point, having previously programmed =
into the end of the 8051 ROM (only if contents are FFh) a loop that =
dumps the contents ?

Nick.

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<DIV><FONT size=3D2>Hi List,&nbsp;&nbsp; <BR></FONT><FONT size=3D2>Is =
there an ECU=20
out there somewhere that I can plumb into my '1600cc 1987 Toyota MR2=20
Supercharged.<BR>I would like MAP as opposed to AFM it currently has, 4 =
cyl=20
sequential injection and possibly 2 or 4 coil ignition.&nbsp; The main =
thing is=20
availability of aftermarket utilities to modify / customize my =
ECU.<BR>The=20
current ECU has an 8051 derivative I'm told, and tables are onboard and=20
so&nbsp;can't be modified.&nbsp; I know this is possibly a stupid =
question but=20
does anybody have or know how to obtain the code from this ECU.&nbsp; I =
had to=20
try, but Toyota weren't helpful.<BR>I'm guessing with certainty that =
various=20
lock bits on the ECU's 8051 MCU are set. Is there any 'secret' method =
for=20
dumping the code out of such chips ?&nbsp; How about executing external =
code=20
(via /EA pin) that is a jump, then toggling the /EA pin at this point, =
having=20
previously programmed into the end of the 8051 ROM (only if contents are =
FFh) a=20
loop that dumps the contents ?</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT size=3D2>Nick.</FONT></DIV></BODY></HTML>

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