1 Oct
2014
1 Oct
'14
2:11 a.m.
There are places you can find that will decap with acid and then photograph
for a pretty reasonable rate. On a HAL like the Mac you can just visually
look at the fuse map. Places in China might be cheaper. I think Henry
might have had a place in China do the whole thing for him on a project
once.
I tried decapping one with some nitric acid from a medical supply place,
but it wasn't fuming and the water oxidized the chip. Better just to pay...
I haven't talked to Henry since I found out my dad got ALS. I'm trying to
get back into things, but I'm spending most of my time inventing tools for
him to enjoy life better. : (
On Tue, Sep 30, 2014 at 11:06 PM, Wouter de Waal <wrm at dw.co.za> wrote:
Hi all
Cloning-a-PAL-HAL-%28Part-2%29&goto=prev
Interesting.
I've been doing something similar as an on-and-off project since 2011
(more off than on). Wrote some code to apply vectors on my Expro, read the
output, didn't know about Minilog (thanks, Chuck), wrote some really clunky
code to do something similar.
I'm working on the MAC PALs which is kind of redundant since I have
Jecel's work archived.
My thinking is that a PAL with 8 registers has at maximum 256 states.
Therefore I should be able to apply a vector, clock the PAL 256 times, and
that would give me all the states. Repeat for the other 1023 or whatever
vectors.
But I recently got back into brewing beer so there's not much happening on
the PAL reverse engineering front.
W