Re: Gravitar

Its odd though on that one chip as an example, I can
make it fail at 1%, or 49% depending on the image I
compare it to. When I try to write those images, they
fail at those same spots, either at 1%, or at 49%..I
would think it would fail at same position reguardless
of what you were trying to write to it if the chip
physically failed....

--- Al Warner <al@alsarcade.com> wrote:

> My experience has been - Old chips die. When they
> die, it's usually at
> a single point. Erasing it won't fix it. I always
> erase a chip prior
> to trying to write to it.
> YMMV,
>
> -Al-
> andre wrote:
> > ok..
> > Do the 27 and 25's need to be erased prior to
> > programming? Its really odd because I can read all
> > chips fine (or so it says) but have a pile that
> will
> > not program. One chip I can read, but when I
> compare
> > to the image, it fails at about 49%. When I write
> to
> > the chip, it fails at the same spot. If I open an
> > unrelated image for a different position, it of
> course
> > fails immediately in the compare...when I try to
> write
> > that image, it fails immediately as well. I'm
> curious
> > if it is a hardware failure in the chip, why it
> would
> > fail at 2 different places...if its not hardware,
> why
> > can't it write past the fail point? I'm wondering
> if
> > its worthwhile to get an eraser now...
> >
> >
> > --- COLIN DAVIES <colin.w.davies@btopenworld.com>
> > wrote:
> >
> >
> >> I think that's doable - You would need to check
> how
> >> the extra pin was wired up... You may have to
> burn a
> >> double image, which is probably a safe bet
> anyway.
> >>
> >> Cheers, Colin
> >>
> >> andre <livnfree_can@yahoo.com> wrote:
> >> It looks like it reads ok...
> >> If any of these chips don't compare against the
> rom
> >> image and give an error, they will not program
> >> beyond
> >> that spot either...
> >> Is it possible to use a larger size chip in place
> of
> >> a
> >> smaller one? ie. a 2732 in place of a 2716?
> >>
> >> p.s. your date is off quite a bit... trying some
> >> software out? ;)
> >>
> >>
> >> --- Mark Hooks wrote:
> >>
> >>
> >>> If they are 2516s you should be able to read or
> >>> program them as 2716s. Just
> >>> use the 2716 setting on you programmer. They are
> >>>
> >> pin
> >>
> >>> compatible.
> >>>
> >>> Mark Hooks
> >>> ----- Original Message -----
> >>> From: "andre"
> >>>
> >>> To:
> >>> Sent: Wednesday, April 11, 2007 11:23 PM
> >>> Subject: VECTOR: Gravitar
> >>>
> >>>
> >>>
> >>>> Got my programmer in and tried it on a few
> >>>>
> >> chips..
> >>
> >>>> Unfortunately it can only do 27 series so I am
> >>>>
> >> out
> >>
> >>> of
> >>>
> >>>> luck on the 25's, of which I thought there were
> >>>>
> >>> only a
> >>>
> >>>> few.. anyways..after reseating the chips on the
> >>>>
> >>> Grav,
> >>>
> >>>> she fired up!
> >>>>
> >>>> Self test lists a problem in rom #6.. does
> >>>>
> >> anyone
> >>
> >>> do
> >>>
> >>>> programming of 25's?
> >>>>
> >>>> Second, in the diamond pattern test screen, the
> >>>> diamonds are WAY outside of the white box and I
> >>>>
> >>> cannot
> >>>
> >>>> get them inside or centered...could this be
> part
> >>>>
> >>> of
> >>>
> >>>> that rom or does it point to other things? The
> >>>>
> >>> game
> >>>
> >>>> for the most part seems to play fine although I
> >>>> 'think' your home system is supposed to be a
> >>>>
> >>> joined
> >>>
> >>>> circle...the ends on this one don't meet up...
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >
>
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> >>>
> >>>> chris@westnet.com
> >>>>
> >>>
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Received on Fri Apr 13 13:04:22 2007