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About Rolo

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    Augsburg, Germany
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    C64, Atari ST, Atari 800, Atari VCS, Colecovision, Odyssey 2, Vectrex, Dragon Computer, Intellivision, Interton VC-4000, AVPS 1292, Arcadia 2001, EPOCH SCV, TI99/4A, Pong

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  1. project update: Batch sold out! Thanks everybody for the support! 🙂👍
  2. project update: In the beginning, I wanted to announce the start of selling of the new batch, but due to pre-orders half of them are already gone... 🙉 Four kits of the current batch are left, two ready built and two almost ready, waiting for some components to arrive. If you want one, now is a good time to send me a PM. 😀 First come, first serve. They are US$ 65 each, plus shipping. Please read the post above and make sure that you have the tools and skills required. It is not a ready-to-use product, but a kit.
  3. Upps, the last picture is an error. Should be deleted, but I can't edit the post anymore.
  4. How to mount the new VECTREX Joystick Kit v3.2 (2021) This is the content of the kit: controller pcb (built and tested) auto-fire pcb (built and tested) joystick-cable 2 pots with knobs 4 buttons controller stick with central screw The two pcbs are connected with a cable: After checking the pins and colors of the cable, you solder it to the panel of controller pcb. Please note the four poles and screws for mounting the pcb to your panel. At the bottom of the pcb there are two small pots for calibrating the center position of the stick with the help of a little screw driver. You mount the pots directly onto the on the auto-fire pcb and solder the 3-way connections or you mount them completely separate on your front panel, if you prefer. You solder wire-connections to the four buttons. After making the proper cut-offs in your panel, you mount the pcb with two screws. Cut the pots' wells to fit your design. Put the stick onto the analog controller and fix it with the central screw. The screw has a very loose seat. Just turn it with minimum momentum and use a small drop of glue on the end of the screw to sustain it. That's it!
  5. Hi Pingo, Thanks for your interest! I'll put your name on the list. 👍 I still need some time, since I'm also busy with some other retro projects at the moment, which I can't interrupt. Not enough spare time I guess. Or I'm not fast enough. I'll come back to you (PM).
  6. Paddle for the Arcadia 2001 Finally I made a paddle for the Arcadia. Notice, the black-silver knob is an original part of my very first pong console from "Quelle" - a "UNIVERSUM-Multispiel", like this one (Internet picture): Ours just had a silver plate on top of the knobs. It must have been Christmas 1977. There is nothing left of our console, except the two knobs and that selector switch. When the console died, I kept those for use somewhere else. They were lying in a box for decades. I think, this application is the right one, to bring them back to action! 🕹️ A paddle is quite simplistic. I used a linear 500kOhm potentiometer. The button is for future use and does not do anything, yet. The Arcadia does not provide a paddle button, but I might need the paddle for another console someday. The cable is an old PC-audio cable, which I cut into two. The potentiometer is connected to 1 and 3. The button to 2 and 3. The case is a standard electronics-shop housing. A quite nice and good looking component, which is available in different sizes.👍 A little test, playing Circus, the only Arcadia compatible (originally not Emerson) game, I know of: Wow, this is a fast game! 😄 But finally playable.
  7. @Ricardo Cividanes: Did you have a look at http://www.vc4000.de/html/geschichte.html? There is somebody, who specialized on Interton VC4000. He already was in contact with the son of one of the former owners of INTERTON (Gerald W. Türk). Maybe he has more information, than presented on the web-site.🤔
  8. I see your point. A good idea! A kind of "translator"-circuit. Of course, this can be done. Could be a real old-fashioned flipflop-based decoder (anybody still remembers how to do Karnaugh maps? 😆), a rom table or a microcontroller (electronic overkill) or something else. Or even simpler: some 4016 based switch rewiring. Yes, that's simple and straight forward! I may do some thinking. Thanks for your input. Still a two button joystick would be required. The numeric game selection pad of the console is not a problem. It simply stays where it is. No need to have it on the joystick.
  9. No, the plan is to make a new - hopefully better - joystick for the console. In the beginning I was thinking of an adapter, too. But wiring is to different. ATARI style joysticks connect every switch to common ground, so they are all connected to each other. The Super Cassette Vision does not work that way. I'll report in this thread... 🕹️
  10. The datasheet of the 2636 writes on page 2: "PCK | input pin | Position Clock: Generated by the 2622 USG to synchronize the PVI's internal functions. (3.58 MHz, 227 pulses/line)." There is a PAL USG 2621 and a NTSC USG 2622 by Signetics. Datasheet: PAL: "The USG accepts a single 3.55MHz Input clock and generates various timing outputs including vertical, horizontal and composite blanking, composite sync and color burst flag. Several auxiliary clock outputs are also provided." NTSC: "The USG accepts a single 3.5796MHz Input clock and generates various timing outputs Including vertical, horizontal and composite blanking, composite sync and color burst flag. Several auxiliary clock outputs ara also provided." 8.867239 MHz (crystal) *2/5 = 3.546896 MHz (USG) There must be a clock divider, probably the strange PE1X-chip, of which I do not find any information. 3.546896 MHz / 4 = 0.886724 MHz (CPU) and 8.867239 MHz (crystal) / 2 = 4.4336195 MHz (European PAL color subcarrier)
  11. I checked the clock frequency of the 2650 processor: It's 887 kHz.
  12. There are only a few cartridges, which contain extra RAM inside the cartridge: CHESS 1 4 kBytes ROM + 1 kByte RAM CHESS 2 6 kBytes ROM + 1 kByte RAM DRAUGHTS 4 kBytes ROM + 1 kByte RAM BACKGAMMON 4 kBytes ROM + 1 kByte RAM Come-Frutas 4 kBytes ROM + 1 kByte RAM Hobby Module 2 kBytes ROM + 2 kBytes RAM
  13. Hi, Not so obscure, I think. Quite common, but it is true, not so much information available. I opened up my ACETRONIC MPU-1000 and took some photos. PAL-version: crystal 8.867 MHz, obviously divided. Concerning clock, I read the figure 0,887 MHz, which would be something like a quarter of the NTSC color burst (~3,58 MHz). Hmmm, PAL color burst is ~4,434 MHz, the crystal oscillates at twice this frequency. If we divide this by 4, we would end up at 1.108 MHz, which would seem plausible, too. Maximum Clock is 1.25 MHz. Maybe some measurement required. Does anybody know? Microprocessor Signetics 2650AN (40 pin plastic): RAM: There is no real RAM onboard the console, at all. The console is using 37 bytes of scratch pad memory of the PVI-chip (Signetics 2636).
  14. Yes sure, the port pins of port B are isolated from each other with the help of diodes to prevent shorts, when more than one switch is closed. Four diodes inside each controller.
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