Re: Gravitar

p.s. the attachment has blanks for images..

--- andre <livnfree_can@yahoo.com> wrote:

> 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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> or
> > >> problems to
> > >> > chris@westnet.com
> > >>
> > >>
> > >
> >
>
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> > >>
> > >
> > >
> > >
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> ---------------------------------
> Common EPROM Pinouts
>
>
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Received on Fri Apr 13 21:42:06 2007