I'd go as far as to melt the epoxy off the thing to
get at the internal configuration. But only if burning
a new PAL is easy and cheap.
--- Gordon JC Pearce <gordonjcp at gjcp.net> wrote:
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.
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