Eagle PCB to Galaxian 4in1 Mod?

[Guest]

Archived from groups: rec.games.video.arcade.collecting (More info?)

Hello,

Does anyone know what the hack is to get the galaxian 4in1 Mod to run on an Eagle PCB is?
I think it has to do with the a14/a15 address lines, but I need someone to fill in the details.

THANKS!




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[Guest]

Archived from groups: rec.games.video.arcade.collecting (More info?)

Uh... 4-in-1 mod? Never heard of this. Any other info you can provide?

Thanks,
-roy-


"Astgl" <astgl@charter.net> wrote in message
news:nBzve.32219$yS4.2298@fe72.usenetserver.com...
> Hello,
>
> Does anyone know what the hack is to get the galaxian 4in1 Mod to run on
> an Eagle PCB is?
> I think it has to do with the a14/a15 address lines, but I need someone to
> fill in the details.
>
> THANKS!
>
>
>
>
> --------------= Posted using GrabIt =----------------
> ------= Binary Usenet downloading made easy =---------
> -= Get GrabIt for free from http://www.shemes.com/ =-
>
>

 

[Guest]

Archived from groups: rec.games.video.arcade.collecting (More info?)

Astgl <astgl@charter.net> wrote:
: Hello,
:
: Does anyone know what the hack is to get the galaxian 4in1 Mod to run on an Eagle PCB is?
: I think it has to do with the a14/a15 address lines, but I need someone to fill in the details.

A15 and A14 are swapped in the address decode on some moon cresta / eagles.

How you correct this depends on the kit, but it's often easiest to just cut and
swap the traces at pins 4 and 5 of the CPU.

--
Mark Spaeth mspaeth@mtl.mit.edu
50 Vassar St., #38.265 mspaeth@mit.edu
Cambridge, MA 02139
(617) 452-2354 http://rgvac.978.org/~mspaeth

 

[Guest]

Archived from groups: rec.games.video.arcade.collecting (More info?)

Chumblespuzz <nospam@cademo.com> wrote:
: Uh... 4-in-1 mod? Never heard of this. Any other info you can provide?

I've been selling 4-1 galaxian forever:
Galaxian
Super Galaxian
Galaxian part X
and some 4th game I can't remember

They use these boards to plug into the test connector and eliminate
those horrendous rom boards:

http://www-mtl.mit.edu/~mspaeth/pics/Fingers.jpg

(2 boards in the lower right: 1 with a cpu socket which is great for the
test bench, and the other without, but will handle a larger rom for more
revisions)


The "four play" mod from the UK adds gfx hacks to add in "Exodus"
intead of the 4th galaxian revision, and is a DIY hack:

http://www.ionpool.net/arcade/galaxian_hacks/fourplay.htm

It's compatible with my boards, but it still has wires soldered to the board.

--
Mark Spaeth mspaeth@mtl.mit.edu
50 Vassar St., #38.265 mspaeth@mit.edu
Cambridge, MA 02139
(617) 452-2354 http://rgvac.978.org/~mspaeth