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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