Looks like the data is there BUT on a different layer as if you adjust the contrast so that the back is very dark you Can see what should be on the writing layer?
Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows From: Russell Pitman<mailto:[email protected]> Sent: 01 January 2022 01:28 To: [email protected]<mailto:[email protected]> Subject: Re: [M100] M100 Information OK, Progress has been made! It now seems to boot. I still feel that a new VR1 is needed as this one is VERY sensitive. Next issue is that of missing lines on the screen... Looks like the screen is in 2 halves and the top line is playing up on both... Getting excited now, new toy lol Thanks Russ Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows From: Brian K. White<mailto:[email protected]> Sent: 01 January 2022 01:18 To: [email protected]<mailto:[email protected]> Subject: Re: [M100] M100 Information Thanks much, and wow. If you look at page 71, pages 70 and 71 are the same, but 70 is a low res scan and 71 is a high res scan. It shows both the main and option roms right next to each other and sure enough shows that their pinouts are different. I have uploaded a cropped and de-duped copy to archive.org, so for everyone else, you can see page 70 here: https://archive.org/details/kyotronic-kc-85-service-manual/ (download the pdf, the web viewer is super blurry) https://archive.org/download/kyotronic-kc-85-service-manual/Kyotronic_KC-85_Service_Manual.pdf I have the user guide and basic manuals, and I just noticed that the user guide the section at the end with all the interface pinouts, doesn't even mention the option rom socket at all, even though it does include the system bus socket. Though does not include the ram sockets either. Even the service manual doesn't mention the option rom socket in the same section where all the other interfaces are described. Strange. I guess this means that if you ever wanted to create an option rom for KC-85, you'd actually have to use a Teeprom or REX to do it! This is super strange. Maybe the M100 pinout was not invented custom for the M100 after all? Like maybe Sharp already had a mask rom model with this pinout that Kyocera & Tandy just selected from Sharp's existing offerings? Or Kyocera created the custom pinout just for the option rom for some reason, and Tandy just kept it and even went further to apply it to the main rom, again "for some reason"? -- bkw On 12/31/21 4:59 PM, Stephen Adolph wrote: > Brian, > I will send you a link. > schematic is a bit blurry. > ALE on pin 23. yep same as M100. > > image.png > > I still have the original with me, maybe I can get some better diagrams > scanned. > > Steve > > > On Fri, Dec 31, 2021 at 4:51 PM Brian K. White <[email protected] > <mailto:[email protected]>> wrote: > > On 12/31/21 11:16 AM, Stephen Adolph wrote: > > Yep. Some M100s were built with that PCB, as was the KC-85. > Makes sense. > > cheers > > Steve > > Could you send me the docs you have for the kc-85? A few months ago I > asked if anyone had downloaded the service manual from the now-dead > link > in Don Fox's member directory on club100. > > http://club100.org/memfiles/index.php?directory=Don%20Fox > <http://club100.org/memfiles/index.php?directory=Don%20Fox> > > At that time you said that you thought you had it and would look. > > I can't believe it's really the same pcb, because if nothing else, I > can't believe the kc-85 would have the m100 pinout for the option rom, > and even the late model 100's with a standard pinout for the main rom > still have the 100 pinout for the option rom. > > kc-85 also has no bcr port or modem, but it does have the > footprints, so > possibly the related parts could be populated. > > -- > bkw > -- bkw
