Ambidextrous software
Ludis Langens
ludis at cruzers.com
Sun Jul 2 10:23:06 GMT 2000
I've been reading a huge backlog of fresh PROMs. Doing this, I found a
new software ID that supports two ECMs with dissimilar hardware. The ID
byte is 107 (or $6B). I have two MEMCALs with this version of software.
Both are for the 2.3 liter Quad 4 engine (code LD2). ARHM6030 is for a
1988 N-body using the 1227749 ECM. ARPZ6720 is for a 1989 with the
1228707 ECM. The '8707 adds an extra SOIC device to what the '7749
contains. Either this IC doesn't do much, or the version 107 software
has a mode flag to support both hardware configurations.
Also while reading all the fresh PROMs, I found an old 1Kbyte bipolar
PROM with a single bit error. Actually, I have two PROMs with the same
BCC but with a single bit difference between them. These old PROMs
don't seem to have a sumcheck of any sort, so I can't determine which
one is the correct one.
--
Ludis Langens ludis (at) cruzers (dot) com
Mac, Fiero, & engine controller goodies: http://www.cruzers.com/~ludis/
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