He's replaced the 6520s with no change. Meanwhile he's got the BASIC 4 ROMs working somehow, but apparently the graphics version of BASIC 2 still gives a blank screen. However, there is also a problem with the upper 16kB RAM; offhand I can't see why that would consistently only affect the graphics version, but IMO certainly something to look into before spending much more time on the ROM puzzle. m ----- Original Message ----- From: "Christian Dirks" <Toast_r@IdeaLine.info> To: <cbm-hackers@musoftware.de> Sent: Sunday, June 23, 2013 5:15 AM Subject: Re: (Fwd) Re: 8032 crt vs. 3032 crt > The only thing that comes in my mind at first is the 6520 PIA at C7, which > operates the keyboard, although this seems a bit like a last straw. > > Christian > > Am 23.06.2013 08:32, schrieb Ruud@Baltissen.org: >> Hallo Giovi, >> >> >> To be honest, I have no idea. So I forward your question to the >> famous CBM-hackers again. >> >> >> ------- Forwarded message follows ------- >> From: "Giovi" <stravaccato68@yahoo.it> >> To: <Ruud@Baltissen.org> >> Subject: Re: (Fwd) Re: 8032 crt vs. 3032 crt >> Date sent: Sat, 22 Jun 2013 14:54:58 -0300 >> >> >> Hi Ruud, >> >> I have a new question for you! >> >> With some good and expert friends at >> http://www.vintage-computer.com I took >> the decision to fix the original 3032 board. >> >> After fixing some minor problems we arrived at a dead point. >> >> The computer works (boot and answer to keyboard command) only with >> the edit >> ROM for business keyboard. It doesn't work (it hangs with a black >> screen >> while booting) with the edit ROM for graphic keyboard. >> >> We tried with basic 2 and basic 4, of course with correct set of >> Rom/Eprom. >> Same result: ok with business keyboard rom, no way with graphic >> keyboard >> rom. >> >> We checked it with a petester.bin ROM and all seems ok at least >> with this >> simple diagnostic. >> >> It *seems* that some instructions in the edit ROM (at $E000) for >> the graphic >> keyboard make it to hang. >> >> Have you some experience/ideas about this? >> >> I also don't understand if is there any difference (jumpers, >> components...) >> between graphic keyboard assy and business keyboard assy... >> >> cheers, >> Giovi >> >> >> ------- End of forwarded message ------- >> >> >> -- >> Kind regards / Met vriendelijke groet, Ruud Baltissen >> www.Baltissen.org >> >> >> >> >> >> >> >> Message was sent through the cbm-hackers mailing list > > > -- > Christian Dirks > Toast_r@Idealine.info > > > > Message was sent through the cbm-hackers mailing list Message was sent through the cbm-hackers mailing listReceived on 2013-06-23 16:00:13
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