Re: Gravitar

Heh..interesting..
Kinda pumpped to get this last eprom programmed..doing
the asteroids deluxe got me the game playing blind
with watchdog grounded, and the Omega Race now coins
up, but no display (actually 2 dots joined by a line)
and you cannot start game....but at least life!

--- Mark Hooks <markhooks@earthlink.net> wrote:

> I think that's right. It's been forever since I
> needed to edit a chip's
> program. Sounds like that battlezone board might
> have started out as Red
> Baron. Its the same board with one modded Eprom.
>
> Mark
> ----- Original Message -----
> From: "andre" <livnfree_can@yahoo.com>
> To: <vectorlist@vectorlist.org>
> Sent: Friday, April 13, 2007 9:38 PM
> Subject: Re: VECTOR: Gravitar
>
>
> > Thanks Mark. I only have one case where I am
> forced
> > until I get my chips in to use a larger size...it
> will
> > not program with the smaller image. I have read
> > elsewhere that you need to double the image inside
> the
> > larger chip? If so do I just use a hex editor and
> > paste the data below the original and save? Its
> been a
> > looong time since I did this end of things. Its
> rom
> > 413 on battlezone and whomever did it before
> lifted a
> > pin and tied it to a 74ls139 at M2.
> >
> >
> > --- Mark Hooks <markhooks@earthlink.net> wrote:
> >
> >> Amazing how long the software trial lasts if the
> >> clock is off.
> >>
> >> Swapping to a larger eprom is possible. Keeping
> the
> >> pinouts and voltages
> >> straight is the main key. Speed of the eprom is
> also
> >> important. You can go
> >> faster but not slower. I attached a comparison
> sheet
> >> that shows some common
> >> ones. Some boards are set up for various jumpers
> to
> >> swap from one eprom to
> >> another.
> >>
> >> Mark
> >> ----- Original Message -----
> >> From: "andre" <livnfree_can@yahoo.com>
> >> To: <vectorlist@vectorlist.org>
> >> Sent: Friday, April 13, 2007 11:04 AM
> >> Subject: Re: VECTOR: Gravitar
> >>
> >>
> >> > 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 <markhooks@earthlink.net> 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" <livnfree_can@yahoo.com>
> >> >> To: <vectorlist@vectorlist.org>
> >> >> 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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> >>
> >
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> >> >> > chris@westnet.com
> >> >>
> >> >>
> >> >
> >>
> >
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> > Common EPROM Pinouts
> >
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Received on Fri Apr 13 21:57:06 2007