Re: RASTER: FW: Using 8080 pod on Midway 8080 boards (Space Invaders)

Hi Andrew,

The ftp site moved a while ago - on your side of the pond now!

FTP site is:
ftp://ttl.arcadetech.org/TTL/Test_Equipment/Fluke/PDFs/Training_and_Troubleshooting/

Thanks for destroying the value of your NOS adapter (will someone please
treat Andrew to a cup of tea?), we all appreciate it! I've uploaded a
zip version (in case some folks are .rar challenged) to the above
mentioned directory.

John :-#)#

Andrew Welburn wrote:
> Why can't i see anything in the flippers ftp today ?
>
> Opening a 30 year old packet! should i? how dare you suggest it! i'll
> let out the 1983 air! i need my hazmat suit and breathing apparatus..
>
> I just opened it... its value has dropped 1000%. Its now worth $1 :(
>
> http://www.andysarcade.net/pix/9000A-8085adapter.rar
>
> Unfortunately not much interesting info there... no schems... but i
> opened it all up and took photos.. stick it on the FTP somewhere i
> guess..
>
> useful?
>
>
> Andrew Welburn
> http://www.andys-arcade.com
>
> On 04/03/2013 16:33, John Robertson wrote:
>> Andrew Welburn wrote:
>>> Just to round this discussion off.. i have this adapter (unused) :
>>>
>>> http://www.andysarcade.net/pix/9000A-8085uutadapt.JPG
>>>
>>> to quote:
>>> "Improves clock signal quality between UUT and the pod by reducing the
>>> effects of capacitive loading"
>>>
>>> Proof that there are instances where a pod wont work quite right
>>> in-circuit. It is rare, but some circuit designs are on the edge and
>>> the pod can tip the balance.
>>>
>>> Andrew Welburn
>>> http://www.andys-arcade.com
>>
>> Hi Andy,
>>
>> Feel like opening the package and sharing a PDF of the instructions?
>> Probably includes a schematic of the mod which may help others (like me)
>> figure out a simple way to improve Pod response...although it may simply
>> be a kit made by Fluke based on their technical tip guide B0151 which
>> has suggested mods:
>>
>> (ftp) Fluke/PDFs/Training_and_Troubleshooting/B0151-Guide to 8085
>> Troubleshooting.pdf
>>
>> Thanks!
>>
>> John :-#)#
>>>
>>> On 19/02/2013 04:12, John Robertson wrote:
>>>> David Shoemaker wrote:
>>>>> The pod has a -1 CPU in it which should be good to 3 mhz the board
>>>>> is a
>>>>> straight 8080a which should be 2mhz. But I tried it with the CPU
>>>>> from
>>>>> the
>>>>> board just for completeness. No improvement. And the pod cpu works
>>>>> fine in
>>>>> game.
>>>>>
>>>>> I have one board that will at least start up partially with the pod,
>>>>> but two
>>>>> others that just error on Run UUT.
>>>>>
>>>>> It is really inconsistent. I think the way the memory system works
>>>>> the
>>>>> fluke
>>>>> ram test will never work (strange timing and sync to get the game
>>>>> board
>>>>> rotation stuff to coordinate access to ram).
>>>>>
>>>>> I have two of these pods, both use the flat ribbon. I tried
>>>>> subbing a
>>>>> twisted ribbon from an 8085 pod but the pod fails self test (I
>>>>> suspect
>>>>> the
>>>>> ground lead is mucking with something).
>>>>>
>>>>
>>>> I was testing an 8080 board only last year, but didn't get it booting,
>>>> so it is sitting waiting for me to take another go. I can't recall
>>>> doing
>>>> the "Run" on any of the 8080 boards recently so haven't any better
>>>> ideas
>>>> at the moment...
>>>>
>>>> Perhaps someone else here has a suggestion?
>>>>
>>>> John :-#)#
>>>>> -----Original Message-----
>>>>> From: techtoolslist-bounces@flippers.com
>>>>> [mailto:techtoolslist-bounces@flippers.com] On Behalf Of John
>>>>> Robertson
>>>>> Sent: Sunday, February 17, 2013 7:23 PM
>>>>> To: techtoolslist@flippers.com
>>>>> Subject: Re: [Techtoolslist] RASTER: FW: Using 8080 pod on Midway
>>>>> 8080
>>>>> boards (Space Invaders)
>>>>>
>>>>> David Shoemaker wrote:
>>>>>> So my mails to tech tools don't appear to be getting through. But
>>>>>> this is a raster game so I will cross the stream.
>>>>>>
>>>>>>
>>>>>>
>>>>>> *From:* David Shoemaker [mailto:davids@oz.net]
>>>>>> *Sent:* Saturday, February 16, 2013 12:20 AM
>>>>>> *To:* 'Technical Tools Mail List'
>>>>>> *Subject:* Using 8080 pod on Midway 8080 boards?
>>>>>>
>>>>>>
>>>>>>
>>>>>> I have a fully working space invaders board which when I hook the
>>>>>> pod
>>>>>> up to and do Run UUT doesn't, it starts up and crashes.
>>>>>>
>>>>>>
>>>>>>
>>>>>> Pod passes self test.
>>>>>>
>>>>>>
>>>>>>
>>>>>> Anyone ever done this?
>>>>>>
>>>>>>
>>>>>>
>>>>>> David
>>>>>>
>>>>> Try a faster 8080 CPU in the pod, or try substituting the 8080 from
>>>>> the game
>>>>> in place of the pod CPU. It is possible the CPU is bad or slower
>>>>> than the
>>>>> system can handle.
>>>>>
>>>>> Do you have the flat ribbon cable from the pod to the CPU socket
>>>>> or the
>>>>> twisted pair cable? The twisted pair cable handles noise better and
>>>>> will
>>>>> work in situations when the simple flat cable won't, plus it can be
>>>>> longer
>>>>> as a result.
>>>>>
>>>>> David, I have no idea why this did not show up in TTL - you are
>>>>> subscribed
>>>>> under the same email address as you posted here. I haven't seen any
>>>>> bounces
>>>>> for your email address.
>>>>>
>>>>> John :-#)#
>>
>>
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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)
                 www.flippers.com 
"Old pinballers never die, they just flip out"
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