I had a try, yesterday evening with this hacked ROM. Results, even if still imperfect, are usable and are the best ones I could have until now. In détails : [Note : no shielded cables in my test] (Analogic) SCART/Composite video with "normal" 6540ROM adapter : Had a stable B&W display, really too much shifted to the upper left, with something as big snow. Not really usable. [and somewhat out of what I wish, a VGA display, not a TV display] (pure digital) VGA/GB8220/Direct 7402 pin 4 output on 6540ROM adapter : Had a "mostly stable" green display, shifted to the right but I can manage changing GB8220 setup. In "mostly", I mean GB8220 seems to loose sync once every 5 second but recover very fast. While this is not the ideal setting, this is suficient to allow me to peek & poke to 6545 registers, trying to find the right values. I'm comparing PET's video output with C128's RGBI output as a reference. Keyboard maps to QWERTY but that's okay. ... Could not obtain anything with SCART using Steve's editor ROM ... "No signal" ! Does anyone knows : - What are registers values supposed to be OK ? - Locations, in this hacked ROM, to patch to change those registers values ? Regards Tous vos emails en 1 clic avec l'application SFR Mail sur iPhone et Android - En savoir plus. ======================================== Message du : 18/12/2013 18:08 De : "Rob Clarke " <email@example.com> A : firstname.lastname@example.org Copie à : Sujet : Re: Re: PET video to VGA If it helps you, one of the edit ROM's Zimmers already has the CRTC already set for 15.625 khz horizontal. I know this is PAL timing but possibly a step in the right direction. That one is: http://www.zimmers.net/anonftp/pub/cbm/firmware/computers/pet/edit-4-80-b-50Hz.901474-04_.bin cheers, Rob On 18/12/2013 17:36, Steve Gray wrote: > I'm in the middle of working on my editrom project, but hopefully I > could build whatever combination of screen, timing and keyboard you > need. Are you using a French keyboard or standard B? I haven't looked > at the French edit rom binaries yet. > > I have other edit rom request to fill as well... so little time. > > Steve > > FROM: "email@example.com" > TO: firstname.lastname@example.org > SENT: Wednesday, December 18, 2013 11:13:22 AM > SUBJECT: Re: Re: PET video to VGA > > Anders, > I had forgotten to try this ... Direct 6540ROM to Scart using Steve's > editor ... Not the ideal solution in my mind but simplier ... > Thanks > > Tous vos emails en 1 clic avec l'application SFR Mail sur iPhone et > Android - En savoir plus . > > ======================================== > > Message du : 18/12/2013 17:01 > De : "Anders Carlsson " > A : email@example.com > Copie à : > Sujet : Re: PET video to VGA > > Steve Gray wrote: > >> Ok, so if you have the right NTSC signal you will need to adapt the > rest >> of the stuff to work on VGA. > > If Hervé uses his LCD TV with SCART input, he probably can stop at > this > point as just about every (?) European TV set will accept NTSC > composite > video, at least in monochrome. Since the PET in default form doesn't > output > any colours anyway, going through conversion to RGB or VGA would be > plain > overkill unless considered an exercise. Probably the GB8220 converter > could > be used as a scan doubler if the desire still is to get a 31 kHz > signal. > > Best regards > > Anders Carlsson > > Message was sent through the cbm-hackers mailing list > > > > Links: > ------ >  > http://www.sfr.fr/telephonie-mobile/services-options/services-smartphones/applications-sfr/sfr-mail/android?sfrintid=M_email_signature Message was sent through the cbm-hackers mailing list Message was sent through the cbm-hackers mailing listReceived on 2013-12-19 13:00:06
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