[Techtoolslist] leland off road pal dump needed u85

[Fabrizio Vasile]

Il 16/03/2015 21:19, Clay Cowgill ha scritto:
> Since it's an 16L8 (and not an 'R' or 'V') you don't have to worry about any
> hidden internal states.

Yes, sure, a PAL16L8 can't be registered  (flip-flop or latches) but 
only combinatorial logic.


>
> Back around ~2003, Tim Lindquist and I reverse engineered the Capcom CPS2 B
> board PALs.  I made a little wiring adapter for the 16L8 to be read as a
> 2716 EPROM.  (Connect all the inputs to the 'address' lines and the outputs
> to the 'data' lines.)  Reading the "2716" produced a binary file of all the
> possible input/output combinations.  I extracted that as text and formatted
> it in to ABEL table format like:
>
> PAL CONVERTER
> ; Converting: cap_caw.bin...
> [ 0,0,0,0,0,0,0,0,0,0,0,0,0,0 ] -> [ 0,1,0,1 ];
> [ 1,0,0,0,0,0,0,0,0,0,0,0,0,0 ] -> [ 0,1,0,1 ];
> [ 0,1,0,0,0,0,0,0,0,0,0,0,0,0 ] -> [ 0,1,0,1 ];
> [ 1,1,0,0,0,0,0,0,0,0,0,0,0,0 ] -> [ 0,1,0,1 ];
> ...
> [ 0,0,1,1,1,1,1,1,1,1,1,1,1,1 ] -> [ 1,1,1,0 ];
> [ 1,0,1,1,1,1,1,1,1,1,1,1,1,1 ] -> [ 1,1,1,0 ];
> [ 0,1,1,1,1,1,1,1,1,1,1,1,1,1 ] -> [ 1,1,1,0 ];
> [ 1,1,1,1,1,1,1,1,1,1,1,1,1,1 ] -> [ 1,1,1,0 ];
>
> ...and then let the ABEL compiler reduce that to equations and a usable .JED
> for burning new parts.  A pretty much automatic process that didn't really
> require any special 'pal cracking' capable hardware.
>
> The ABEL compiler also produced the intermediate equations which were much
> more compact than the big tables-- for example, ~2000 lines of the above
> stuff cooked down to:
>
> Y8 = (I4 & !I3
>       # I8 & !I4 & I10
>       # I4 & !I10
>       # !I8 & I4
>       # I7
>       # I6
>       # I5
>       # I2
>       # I1);
>
> Y6 = (I4 & I3 & I10
>       # I4 & !I3 & !I10
>       # I9 & I4 & I10
>       # !I8 & !I4 & !I10
>       # !I9 & !I8 & !I4
>       # I8 & I4
>       # !I7
>       # I6
>       # I5
>       # I2
>       # I1);
>
> Y4 = (I9 & I4 & !I3
>       # I4 & !I3 & !I10
>       # !I8 & I4 & I3 & I10
>       # !I7 & I4 & !I3
>       # !I7 & I4 & !I10
>       # I8 & I7 & I4
>       # I8 & !I7 & !I4 & I10
>       # !I8 & I7 & !I4 & !I10
>       # !I9 & !I8 & I7 & !I4
>       # I6
>       # I5
>       # I2
>       # I1);
>
> Y1 = (!I1);
>
> -Clay

I was aware of this possibility of dumping PLD like a normal EPROM but 
there could be issue with some programmers.
>
>
> -----Original Message-----
> From: Techtoolslist [mailto:techtoolslist-bounces at flippers.com] On Behalf Of
> Tony htbs
> Sent: Monday, March 16, 2015 12:23 PM
> To: 'Technical Tools Mail List'
> Subject: Re: [Techtoolslist] leland off road pal dump needed u85
>
> U85 is the chip location
> I have the 2-22 u85 non track pac
> can you dump it if I get it to you
> Or can I dump it or get you a file
> I have several programmers
> I can get a 2-25 u85 trac pac but I need to get it back Where are you
> located Let me know thanks tony
>
>
>
>
>
> For Ivan Stewarts off road
>> The track pac should be 2-25
>>
>> And non should be the 02-22
>>
>> Pal16l8 is the chip
> -----Original Message-----
> From: Techtoolslist [mailto:techtoolslist-bounces at flippers.com] On Behalf Of
> Fabrizio Vasile
> Sent: Monday, March 16, 2015 2:02 PM
> To: Technical Tools Mail List
> Subject: Re: [Techtoolslist] leland off road pal dump needed u85
>
> Hi, sadly there no available dump of these PAL around.I'm a contributor of
> this PAL database:
>
> www.jammarcade.net
>
> and we haven't them too.If someone could provide us the chip we would be
> happy to dump them
>
> P.S.
> Could you tell me the exact location on PCB and label of this PAL?Maybe they
> are share with other Leland games.Thanks.
>
> Il 16/03/2015 18:09, Tony htbs ha scritto:
>> Ivan Stewarts off road
>
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