Re: TransWarp IIgs GAL's - Upgrade now possible

Hello again Brad.

Thanks for the info. I'll add that to my file. Let me know if you mod the
other card. I'd like to hear how things went.


Henry S. Courbis
www.GSE-Reactive.com
Apple II Series Legacy Hardware - Come take a look at what we have to offer!

"bradw" <mrbrad@xxxxxx> wrote in message
news:l5-dncjvJfaEREPenZ2dnUVZ_tidnZ2d@xxxxxxxxx
> got the below info sent..so have some additonal info on my twgs rev c w/ae
> 32k cache daughter board i posted before..this should be more
> clear....re-read the chips
>
> quote
>
> The GAL's listed are just their part numbers
> from Lattice. Normally they would have a small sticker on
> them, or some small stamped writing which I bet is what
> yours has.
>
> end quote
>
> ok...this is what i can see partially removing the card
> for the gals
>
> twgs1a-1 on the gal16v8-15lp (seeinfoprevmsg)
>
> twgs2a-1 2nd chip below...same type as above
>
> the longer chips below (see prev letter) have stamped on them
>
>
> twgs3b-1 twgs6a-1
>
> twgs4a-1 twgs7a-1
>
> twgs5a-1 twgs8a-1
>
>
> anyway...looking at a twgs card i'm sure you can see the order..more or
> less
> like above assuming my columns work
>
> with my prev post/info people can get an idea on this
>
>
> i guess i only ran at 13.75mhz for 11 years 24/7 on the lost gonzo bbs
> (55mhz crystal) oh well...your speed may vary
>
> just remember to HEAT the exacto knife if you have to cut the traces for
> the
> 32k cache board or the twgs uprgrade mod (i forget which just did it with
> a
> cold exacto knife..it would skip accross the back of the board...i'd dance
> the dance of dismay...and toss stuff for 10min at my walls...plug it
> in.....it would work at 7mhz..whew...do it again..it would skip...repeat
> above..would work at 7mhz....and 3rd time i managed to do it ..still
> skipping accross board...and very lucky no damage..and it then worked at
> 13.75 mhz...i have yet to upgrade another twgs to 14mhz i have here ..even
> thou the parts are here too.due to the stress and potenial nightmares of
> the
> whole experience...anyway someone told me to heat the xeacto knife and
> then
> lightly cut.slow little scratches until it got to the traces that needed
> to
> be cut thru the plastic at the proper depth.....duh...
>
> anybody here who has better info can reply here...all i know is my method
> i
> used sucked...
>
> anyway...that is the further info i have on this
>
> brad
> former sysop lost gonzo bbs
>
>
>


.

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