On Tue, 20 Mar 2007 01:42:14 -0700, SparkyGuy
put finger to keyboard and composed:

Brief trace tracing:

COP8 NMC9306
DIP 40 DIP 8
-------------------------
SO pin 3 pin 3 DI
SK pin 4 pin 2 SK
SI pin 5 Pin 4 DO

I'd say that the DIP-8 IC is a serial EEPROM. It probably stores the
security code.

I think the DIP-14 and DIP-16 IO chips should give you a clue as to
the uC's port layout. I'm betting that one chip drives various
external relays while the other accepts inputs from sensors.

The DIP-16 does drive the relay coils.

The ULN2003 was made by several manufacturers including Motorola. If
its pins are not a match, then I'd try other ULN series devices.

One of them has Motorola logo, one National Semi. Other than that, the part
#s have been successfully rubbed off. A ghost of them remains, but an
electron-scanning microscope might be needed... (c;

Thanks.

Could the DIP-14 chip be a hex buffer, eg 74C90x ???

- Franc Zabkar
--
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