Re: Asteroids mystery mod

Douglas Gauck wrote:
> Seems close if not equivalent. Have you ever figured out what effect
> the 4, 5, 6 and 1.5, 3, 22, 44 settings have on game play?
>
> -Douglas

For those technically interested the speed up changed the clock rate on
the CPU Interrupt generator. The faster the clock the faster the game
play...

John :-#)#
>
> On Oct 28, 2009, at 9:11 PM, Jordan B <vg30.510@gmail.com> wrote:
>
>> I have one as well, also on a rev 2 board. Mine says "rate multiplier
>> board" on the PCB.
>>
>> http://lh5.ggpht.com/_2DiT4K20Btg/Ste-r14Wt1I/AAAAAAAABbw/gQc8Godbs1o/s912/CIMG1679.JPG
>>
>>
>> I was told it was a speed up hack for ops to make more $$.
>>
>> Jordan B
>>
>>
>>
>>
>> On Wed, Oct 28, 2009 at 1:02 PM, Douglas Gauck <douglas@gauck.com>
>> wrote:
>>> I bet you're right as C5 is the starting point for speed mods, just
>>> curious
>>> to see what the various jumper settings will do... 1.5 to 44 is
>>> quite an
>>> interesting range.
>>>
>>> -DrG
>>>
>>>
>>> On Oct 28, 2009, at 1:35 PM, Andrew Welburn wrote:
>>>
>>>> Is it a speed up hack board?
>>>>
>>>> I came across one recently, but it was entirely devoured by fire
>>>> before i
>>>> could buy it/document it.
>>>>
>>>> There are lots of adverts in startech journal and other contemporary
>>>> magazines about speed ups for Asteroids, its more than likely one of
>>>> those...
>>>>
>>>> Andrew Welburn
>>>> www.andys-arcade.com
>>>> ----- Original Message ----- From: "Douglas Gauck" <douglas@gauck.com>
>>>> To: <vectorlist@vectorlist.org>
>>>> Sent: Wednesday, October 28, 2009 5:22 PM
>>>> Subject: VECTOR: Asteroids mystery mod
>>>>
>>>>
>>>>> Hi all,
>>>>>
>>>>> Just got this rev 2 Asteroids board and am trying to ID the board
>>>>> installed in C5:
>>>>>
>>>>> http://gallery.me.com/douglasgb#100011/Ast%20Mod%202&bgcolor=black
>>>>>
>>>>> U1 is an LS161
>>>>> U2 is an LS00
>>>>> U3 is an LS00
>>>>> U4 - U6 are LS393N
>>>>>
>>>>> pin 9 of U3 can be jumpered to "4", "5", or "6" which go to pins
>>>>> 1,2 and
>>>>> 10 of U3 and 9 of U4, pin 11 of U4, or pin 10 of U4
>>>>>
>>>>> pin 13 of U6 can be jumpered to "1.5", "3.0", "22" or "44" which
>>>>> go to
>>>>> pin 5, pin 6, pin 3 or pin 4 or U6
>>>>>
>>>>> Board is currently not working (no picture, Start 1 and 2 flashing,
>>>>> never-ending high beeps in self test); while waiting for RAM I
>>>>> thought I'd
>>>>> ask if anyone has seen this and knows what it might do.
>>>>>
>>>>> -Douglas
>>>>>
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>>>>>
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>>>>> chris@westnet.com
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-- 
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 
Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames)
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