Re: Show & Tell

["atfphotography@gmail.com" <atfphotography@gmail.com>]

On Jun 16, 10:26 am, "Garberstreet Electronics"
<willy4...@comcast.net> wrote:
> <atfphotogra...@gmail.com> wrote in message
>
> ad97b2ba-305b-46e4-bfdf-808607dd6b4c@t16g2000yqi.googlegroups.com">news:ad97b2ba-305b-46e4-bfdf-808607dd6b4c@t16g2000yqi.googlegroups.com...    
> On Jun 15, 9:11 pm, Polymorph <polymorp...@hotmail.com> wrote:
>
>
>
>
>
> >> The other (highly likely) possibility is that the two posts in
> >> question are on the same circuit and the mod is in fact the same (just
> >> implemented differently). Looking at the photo's, the mask on the PCB
> >> seems to suggest that they are on the same circuit. Time to pull out
> >> the multimeter methinks. ;-)
>
> >> Cheers,
> >> Mike
>
> > Hello,
>
> > I'll have to take a look. I actually have three Vulcan GS
> > cards so I took photos of all of them and compared.
>
> > Originally two of them came with dead 20mb drives. Their
> > original ROMs were labeled VUL1.4/GS20. The third card came
> > with a dead 40mb drive and a ROM labeled VUL1.4/GS40.
>
> I have got to have copies of all of the Vulcan ROM binaries.
> Seeing how I only have the GS/20 ROM in my card, could be the
> reason I can't get bigger than a 20MB CF card to work on it.
>
> > The Vulcan GS card with the 40mb drive does not have the
> > capacitor and is Rev A 3489.
>
> > The other two Vulcan GS cards that came with the 20mb
> > drives _do_ have the capacitor and are Rev A 4589.
>
> > Pictures here;
>
> >http://www.atfphotography.com/vulcan2
>
> Ok, something else I am noticing. The ones with Caps at
> Pin50 also have the '3B' GAL at position U1, where capless
> ones have the '3A' GAL.
>
> > I thought one of the cards was dead but then I noticed
> > a leaking cap. Time to pull the soldering iron out! I'll
> > re-try the IIe 1.4 ROM Henry sent me and see if I originally
> > tested it in a bad card.
>
> I have a small box full of cards that I need to try cap
> transplanting with to see if I can resurrect them, as well.
>
> "So much to do, so little time". ( Jack Nicholson's JOKER )
>
> Garberstreet Electronicshttp://www.garberstreet.com

Hello,

What are the GAL chips used for? I remember getting new ones from
Reactive for my upgraded Transwarp GS as well as one for a GS-RAM Plus
that needed it for ROM 3.

Funny you mentioned the re-capping. When I started up on my vintage
stuff a year ago I pulled out the soldering iron and have been re-
capping since. It's amazing (to a electronics laymen like myself) how
much stuff that can be brought back to life by re-capping.

As of now I've gone through and re-capped;

(3) Vulcan GS power supplies  (although I did blow the first one up..
sigh.. don't re-cap while full of vodka..)
(1) IIgs motherboard (video wouldn't work right  - recapped it on a
whim and it's perfect!)
(2) IIe power supplies
(3) IIgs power supplies
(1) FIngerPrint GS+ card (card for capturing any screen in DOS or
ProDOS .. works great now)
(1) UDC card (the original GOLD card I had .. replaced both caps.. all
good!)

I think the most enjoyable part of vintage Apple stuff is not
finishing up the machine but the actual process of finding the elusive
card, re-capping the broken hardware, seeing the results of a bath of
retrobright bring back a machine and digging up old disks full of
images of yourself at 12 making faces at a Computer Eyes IIe.

Good stuff!

ATF