Re: Gravitar

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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>> >> > chris@westnet.com
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>> >>
>> >
>>
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> ---------------------------------
> Common EPROM Pinouts
>
>
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Received on Fri Apr 13 21:51:41 2007