Nice and simple, but unfortunately with the C64, a simple CPU reset will not get you out of some persistent software. Too long to explain here but it is about how the reset vector is set and simply resetting the CPU will only make it jump to where the programmer wants it to jump. So, some clever people came up with something called "EXROM Reset". It involves using a second line (PLA EXROM pin) and pulling both the CPU reset and the EXROM low, but releasing CPU a little before EXROM. There is a good video here, ua-cam.com/video/OV5tNYhqQ7w/v-deo.htmlsi=rTxRNl2_RsN0OVai which explains it much better, also check the follow up video on the same subject.
Well, I know that my solution is not perfect, I just wanted to be able to reset c64 using the keyboard (combination of keys) and I managed to do just that. In addition, I was using the stock C64 and never tested my solution with other Kernal ROMs or other sys cartridges. Thank You for the video suggestion and thank You for watching :) Cheers!
Superb old school logic , very nice explanation
Thank You Lee :) Cheers!
Great job, it's great when you find a way to do the same thing with even less components. Well done you ;)
Thank You so much Peter :) Yes, I'm happy with the design, especially because I'm not a professional. Cheers!
Excellent work and upgrade to the design! Thanks for sharing
Thank You Rudy. I'm very happy with the design. I need to manufacture a proper PCB to make it sexy :) Cheers!
@JosipRetroBits Great idea, and if you need any help with that, let me know.
I will :) Thank You@@RudysRetroIntel
Interesting stuff, Loved my c64, keep up the good work of keeping it alive bud! 🙂👍 Subbed and liked.
Thank You very much :) I will do my best :) Cheers!
malo pitanje - imam c64, kad ga ukljucim, bude samo plavi ekran. da li je do napajanja ili do maticne ploce? sto prvo gledati?
Plavi commodore ekran bez teksta? Ili je plavi ekran pd tv-a?
@@JosipRetroBits samo plavi ekran, bez teksta... Znas ono kad ga upalis, plavi ekran i onda se za sekund pojavi tekst... Na tom plavom ekranu je zapeo
Ok. Moguce jedan od ROM chipova. Ili Basic ili Kernel. A mozda i character rom
C64 longboard ili shortboard?
Very nice, but what happens when you play games with Joystick 1 and you need to go diagonally down right ?
Nice and simple, but unfortunately with the C64, a simple CPU reset will not get you out of some persistent software. Too long to explain here but it is about how the reset vector is set and simply resetting the CPU will only make it jump to where the programmer wants it to jump. So, some clever people came up with something called "EXROM Reset". It involves using a second line (PLA EXROM pin) and pulling both the CPU reset and the EXROM low, but releasing CPU a little before EXROM. There is a good video here, ua-cam.com/video/OV5tNYhqQ7w/v-deo.htmlsi=rTxRNl2_RsN0OVai which explains it much better, also check the follow up video on the same subject.
Well, I know that my solution is not perfect, I just wanted to be able to reset c64 using the keyboard (combination of keys) and I managed to do just that. In addition, I was using the stock C64 and never tested my solution with other Kernal ROMs or other sys cartridges. Thank You for the video suggestion and thank You for watching :) Cheers!