Copy of: Delco ECM uP type
Martin Evans
100341.377 at compuserve.com
Mon Sep 18 20:07:02 GMT 1995
Does anyone out there know what the basis of the uP used in
my Delco sourced ECM is?
The service number is:
161322411.6D MAN FED 16161499 AXMZ
The prom is a 27128 type mounted on a blue/brown
header plugged into the pcb.
On the pcb are a number of 52 pin plcc packaged ic's
markings as follows
2 chips marked 519K 9115 1049 16079435
1 chip marked DELCO 16126532 161 9049 JAPAN A 035
1 chip marked 185 16126997 KQEVZ9028D
The chip is probably not a 68HC11 as it seems to write
to the TMSK2 register twice in the first few lines of code
and also tries to read the CFORC register which is
supposed to be write only. I'm begining to come to
the conclusion that the uP is either a special or maybe
a 6801/6805.
The code 27C107 P5 is etched on the topside of the
board with 27107 P8 in the silk screening.
Anyone got any ideas?
Martin Evans
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