Re: 500 mile Gorf

Rick, if you want to bring your boardset up by me we can swap the boards in
my cab. I've got several extra boards too, I don't think I have a working
CPU board but should have some good Ram boards.

Larry C.
Franklin, WI

"Commander Dave" <cmdr-dave@xxxxxxxxxxx> wrote in message
news:7Cnai.715$s9.355@xxxxxxxxxxxxxxxxxxxxxxxxx

<pepelepew@xxxxxxxxxxxxx> wrote :
...
When the game is plugged in I get a pulse about
every 3 seconds, diagonal lines, no lines (no pic) and back again.

If the diagnostic switch is flipped on, the diagonal lines means you have
some bad RAM (IIRC). The pause is it restarting the diagnostics over after
finding the error. If there is no error, you would get a diagnostic screen
that would let you test the inputs to the game (lots of rectangles which
light up when buttons are pushed, etc.). You can find this information on
page 7 of the Gorf manual.

Board does not seem to start. Is there a Gorf troubleshoot websight
with voltages? Quick bets, voltage, ram, cpu?

As I mentioned above, my bet is that you have bad RAM. On page 7 of the
Gorf manual it says that if you have bad video RAM then "random bars will
flash on the screen" and if static RAM is bad then a "random dotted
pattern will flash on the screen". Funny that I can't remember ever seeing
these type screens... the only one I ever remember seeing is diagonal
lines (like the sync to the monitor is out of whack). Or am I thinking of
Wizard of Wor that does that? Man... I hate when I can't remember simple
stuff. I would fire up my game and do some experiments for you, but alas,
I am waiting for a new monitor to arrive which is expected at the end of
next week. In any case, try flipping the diagnostics switch the other
directions and then fire up the game. Sometimes it will still run
(somewhat) with bad RAM.

Checking the voltages isn't too hard on this game. The best way I have
found to do it is to measure the voltages under load where it where it
plugs into the card cage. The voltages are +5, -5 and +12 and the pins are
labeled (you will have to wipe off the dirt most likely). Pull the
connector back enough to see the pins (but leave it connected) and power
up the game. VERY CAREFULLY measure the voltages. There are pots on the
power supply which adjust each of the voltages. Don't forget to push the
connector back on the card cage when you are done.

Skimmed the manual, > didnt see troubleshooting or voltages. Didnt look
at schems.
Thanks for any help
Rick

Good luck diagnosing your game. I found that having a spare working board
set is about the best way to narrow down problems. You just swap out cards
until you find the bad one. Of course that adds about another $100 to your
game, but if you got the money then I think it is well worth it for the
long haul.

If you are still having problems at the end of next week, drop me an email
and perhaps we can figure it out.

Cheers!
-Commander Dave



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