Re: New to the list

I scanned and posted my original copy of the Vectorbeam Space War documentation. Get it here...
http://www.biltronix.com/space_war_01.html

Be aware that a factory original copy is not necessarily a great copy. The factory-released copies were generally poor photocopies of the original blueprints which themselves were hand drawn. Such docs got much better later with the release of other games such as Star Castle, Rip Off, and Armor Attack.

If you specifically want the Cine version, the Andy's arcade link already provided by Kevin is best.
Here is the direct link: http://arcarc.xmission.com/PDF_Arcade_Manuals_and_Schematics/Space%20Wars.pdf
I sent them my VB copy previously so you'll probably find it there also.

The major difference between the two versions of Space War/s is the monitor circuitry. For example, the VB monitor has an on-board +5V regulator and the Cine version doesn't. Also, all the part references are different. You'll notice that J2 has fewer pins on the VB version. Later Cine monitors such as the Keltron version used in Star Castle do have an onboard +5V regulator as well as other factory built-in enhancements or modifications that were suggested to be made on earlier models.

One enhancement never mentioned in common documentation (that I have seen) that I suggest that everyone add to their Cine monitors is a 1N4007 diode across pins 1 and 3 of the 7805 regulator (cathode at pin 1). All of the other regs on the board have such a diode included by they missed putting on the +5V reg. It's just a standard "to-do" thing when it comes to these regs. Alternately, you can simply replace a 7805 with an LM2940T-5.0 which doesn't require such an external protection diode.

Maybe my other pages will help somewhat...

http://www.biltronix.com/CCPU_Custom_Chip_Replacements.html
http://www.biltronix.com/star_castle.html

Be aware that the Cinematronics Star Castle schematics are about the best quality copy that is available. I can email you a good copy that has all of the CCPU signatures on it and is fully readable. Just pm me if you want.

I would offer to repair your CCPU but if it is a copy made by Sega or whomever, then I wouldn't know if the circuitry is actually all the same or not. Is the monitor in the game using the digital ribbon cable input? Is there a digital to analog converter board in between the CCPU and a monitor that has an analog input? Just wondering. If the CCPU circuitry is identical, then I should be able to repair it if it should ever come to that.

The MMI 6331 is a standard bipolar prom and works the same as other similar parts such as 74S288 or 82S123 made by other manufacturers. The data outputs are valid any time the /G pin is active (low). There's no clock input, just the enable input.

William Boucher
  ----- Original Message -----
  From: Kevin Moore
  To: vectorlist@vectorlist.org
  Sent: Saturday, January 09, 2010 5:49 PM
  Subject: Re: VECTOR: New to the list

  Hello, and welcome..

  I myself am new to the vector, (well arcade actually) scene. I've only seen a space war never played or worked on one before. Pat won't let me have his. :(

  Have you been to

  http://andysarcade.de/spacewars.html

  There is some information listed there, you may have already seen some or all of it already. The schematics they have listed are unfortunately the same ones you pointed out. :(

  There does seem to be some on Ebay, but I'm sure they are probably just print outs of what is online.

  I'm sure some others will chime in, I think Tom still reads these emails.

  Kevin

  On Sat, Jan 9, 2010 at 3:06 PM, Fabrice GIRARDOT <f4brice@gmail.com> wrote:

    Hi everyone.

    My name is Fabrice. I'm 36 years old, living in France.
    I just subscribed to this list.

    I'm currently trying to repair a SEGA vector PCB.
    Game is called "Space Ship" and is an exact clone
    of Cinematronics's Space Wars.

    There is no output sent to the X-Y screen.
    My oscilloscope says that the /RESET signal is periodically
    fired. I understand all the meaning of the word "difficult"
    when it applies to the CCPU troubleshooting ! ;-)

    I use to post all my arcade activities to a french-speaking
    forum called "gamoover".
    Here is the WIP topic for my SEGA game :
    http://www.gamoover.net/Forums/index.php?topic=20677.0
    You'll find there some pictures of the cabinet, screen & PCB.
    SEGA did choose to design a unique board for both logic & audio.

    I can seen important glitches on some of the E14 PROM data bits.
    http://www.gamoover.net/Forums/index.php?topic=20677.msg298794#msg298794
    Does anyone know if its a normal behavior for this chip ?
    Sega is using a MMI 6331-1J.
    Maybe address bus is changed on clock's raising edge and data bits
    are used on clock's falling edge... In this case, it would be OK.

    My master reference for this WIP is this document :
    http://arcarc.xmission.com/PDF_Arcade_Manuals_and_Schematics/Space%20Wars.pdf
    Unfortunately, schematics scanning is not as good as I need it.
    For some signals, it'ss hard to read this so small hand writting.
    Is there any better scan of schematics available ?

    Regards,

    --
    Fab
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Received on Sat Jan 9 21:31:58 2010