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April 2018

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12 discussions

Re: [Techtoolslist] midway 8080 ram test card instructions
by teeray 03 Apr '18

03 Apr '18

John, Looks like the Midway RAM Test ROM posted on the TTL site has bit 0 stuck high. Thanks -----Original Message----- >From: John Robertson <jrr(a)flippers.com> >Sent: Apr 1, 2018 6:29 AM >To: "techtoolslist(a)flippers.com" <techtoolslist(a)flippers.com> >Subject: Re: [Techtoolslist] midway 8080 ram test card instructions > >That photo is of my old 8080 RAM test card that I posted somewhere years >ago...I may have some printed info on the test somewhere. I have two >cards one hacked and the other in good condition, but haven't seen them >since I moved the shop last May - should be able to turn the cards up >Monday though when I am back at the shop. Send me a note if I forget to >post. > >I did upload the ROM code to the TTL FTP site, look under /Midway/Ram >Test, and I just uploaded some pictures showing more of the hacked card, >and my good card in action. As I recall, and it has been years, the LED >at C1 shows "h" or "L" for High/Low and the LEDs at B1 & A1 are the >location. Maybe... > >I also just uploaded to /Midway/Ram Test info on a Space Invaders test >ROM that was dumped by Paul Sommers May 2001 and confirmed working by >Chris Hardy. The code is different from the 8080 RAM test ROM image. > >John :-#)# > >On 2018/03/31 7:43 PM, davids(a)oz.net wrote: >> That picture is missing a cable that goes from the card to the first rom. And that’s all I know 😊 >> >> Sent from my Windows 10 phone >> >> From: tonyhtbsusa >> Sent: Saturday, March 31, 2018 7:26 PM >> To: 'Technical Tools Mail List' >> Subject: [Techtoolslist] midway 8080 ram test card instructions >> >> >> >> >> >> >> >> Anyone have the instructions for this 8080 ram test card >> >> http://arcarc.xmission.com/Test%20Equipment/Midway%20Ram%20Test%20PCB.jpg >> >> tony >> >> hi-tech arcade repair >> >> >> >> _______________________________________________ >> Techtoolslist mailing list >> Techtoolslist(a)flippers.com >> https://pairlist7.pair.net/mailman/listinfo/techtoolslist >> FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment >> Archive site: http://seven.pairlist.net/pipermail/techtoolslist/ > >-- >How to subscribe or unsubscribe from TTL >http://seven.pairlist.net/mailman/listinfo/techtoolslist > >_______________________________________________ >Techtoolslist mailing list >Techtoolslist(a)flippers.com >https://pairlist7.pair.net/mailman/listinfo/techtoolslist >FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment >Archive site: http://seven.pairlist.net/pipermail/techtoolslist/

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midway 8080 ram test card instructions
by tonyhtbsusa 01 Apr '18

01 Apr '18

Anyone have the instructions for this 8080 ram test card http://arcarc.xmission.com/Test%20Equipment/Midway%20Ram%20Test%20PCB.jpg tony hi-tech arcade repair _______________________________________________ Techtoolslist mailing list Techtoolslist(a)flippers.com https://pairlist7.pair.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/

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