Re: Asteroids ROM readme discrepancies

Ok, I'm just getting around to working on my Asteroids and I am very
confused about rom versions/locations. Below is the last message of this
thread, but I've gone through this whole thread several times. Here's the
deal:

I've got a version 2 board (-02 written in marker). It has sockets at C1,
D/E1, F1 and N/P3. The roms (not eproms) that were in it are 035143-02-03,
035144-02-03, 035127-02 (one eprom missing). The only one I could get a
checksum on was the 144, checksum 0CEE. The other 2 are dead.

So, I need to burn some new eproms. I'm going to use the images from MAME. I
would like to use the version 2 images, but the readme file has them listed
in different locations than my board supports.

My questions are:

1) Why does my 144-02 prom have a checksum of those listed for -01 versions?

2) Am I limited to which versions of ROMs I can use in a -02 board?

3) Assuming I can use the MAME roms, which locations do they go in?

Thanks in advance!
-roy-

----- Original Message -----
From: "John Robertson" <jrr@flippers.com>
To: <vectorlist@synthcom.com>; <vectorlist@synthcom.com>
Sent: Monday, December 09, 2002 3:20 PM
Subject: Re: VECTOR: Asteroids ROM readme discrepancies

> There were many changes in the ROMs for Asteroids, stuff to fix bugs in
> earlier versions, plus some variations on the game as I recall. About
three
> or four factory upgrade notices in my files somewhere...Should scan them
> but I haven't the time these days - need a sheet feeding scanner!
>
> John :-#)#
>
> At 12:28 PM 09/12/2002 -0600, Mark Shostak (DOS) wrote:
>
>
> > > I never did finish the readme file for _all_ the ASteroids revisions.
> > Perhaps
> > > someone could fill in the blanks? All my ASteroids boards are packed
up
> > at the
> > > moment...
> > >
> >
> ><SNIP>
> >
> > > Asteroids Version 1 (-02 Revision PCBs)
> > > NAME LOCATION SIZE CHECKSUM
> > > ---------- -------- --------- --------
> > > 035127.01 N/P3 2716 353E
> > > 035143.01 E/F2 2716 2BB4
> > > 035144.01 H2 2716 0CEE
> > > 035145.01 J2 2716 31CC
> > > 034602.01 C8 82S129
> >
> ><SNIP>
> >
> > > Asteroids Version 2 (-05 AND -06 Revision PCBs use ROMs)
> > > NAME LOCATION SIZE CHECKSUM
> > > ---------- -------- --------- --------
> > > 035127.02 N/P3 2716 3632
> > > 035143.02 E/F2 2716 22D4
> > > 035144.02 H2 2716 187E
> > > 035145.02 J2 2716 2F84
> > > 034602.01 C8 82S129
> >
> >
> >I have what are presumably version 2 roms (that is, the rom p/ns end with
> >a -02 suffix),
> >and a rev -05 pcb in the following configuration (and it works):
> >
> >035145-02 E/F2 31cc
> >035144-02 H2 0cee
> >035143-02 J2 2b44
> >
> >As John pointed out, I can believe the board locations changed,
> >but I'm wondering about the checksums vs. rom p/ns. It appears
> >we have two unique sets of checksums. However, we have reports
> >of both sets being sited on both versions of roms.
> >It's possible, but unlikely...
> >
> >-Mark
> >
> >
>
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Received on Fri Dec 27 07:22:07 2002