On Sunday 20 January 2008 21:08:51 Chris M wrote:
16L8ACN. This is the PAL aboard the Acculogic
sIDE-1/16 XT-IDE controller I mentioned. Someone asked :)
... and here's a datasheet.
http://noel.feld.cvut.cz/hw/philips/acrobat/6052.pdf
Now, correct me if I'm wrong, but that seems to suggest that some of the pins
are always inputs, and some may be configured as inputs or outputs.
I reckon it would be possible to work out what's configured as input and
what's configured as output, and from that determine the truth table of the
PAL by brute-force methods (just try all the inputs in turn). From there you
can start looking at how to reproduce it.
Or, it might be doing something so blindingly obvious that you don't even need
to do that - it could be that you could figure it out just from what it
decodes and what it drives...
Probably someone will point out a fatal flaw in this.
Gordon.