Page 10 of 10 FirstFirst ... 678910
Results 91 to 99 of 99

Thread: New board: The VIC-IIČ - PAL/NTSC switch board for Commodore 64

  1. #91
    1stage's Avatar
    Join Date
    Sep 2018
    Country
    United States
    Region:
    Woodland Hills, CA
    Posts
    7
    Feedback
    0

    Default Update 21 FEB 2019

    Quick update: single board solution kinda worked...

    - Optocouplers aren't going to work, unfortunately. Changing to solid state relays.
    - System does work when optocouplers are replaces with wire jumpers, but there is some noise in the screen.
    - I had to move the big capacitor (next to the VIC-II cage on the 250407 board) to the bottom of the motherboard for now.
    - New version will "straddle" the VIC-II slot with the NTSC VIC-II to the left of it and the PAL VIC-II to the right.
    - The eight jumpers at the top of the board will be removed and the board will now slot DIRECTLY into posts/headers (haven't decided on male or female yet) on the C64 motherboard.
    BUT
    - This means that there will be TWO versions of the board: one for 250407 and another for 250425/250466 due to the change in orientation of the VIC-II slot between those two models.
    - I still don't know how much headroom I have before I hit the bottom of the keyboard. The VIC-II chips MUST have a heat sink, and there's only so close I can get to the surface of the motherboard without hitting other components.

    That's it for now.

    - Sean

  2. #92
    1stage's Avatar
    Join Date
    Sep 2018
    Country
    United States
    Region:
    Woodland Hills, CA
    Posts
    7
    Feedback
    0

    Default VIC-II Squared v0.8-M PCBs Due Today

    Hey, the "manual" version of the VIC-II Squared PCBs are due today. This involves using a manual 10p2t push-on/push-off switch that toggles the ten circuits needed to switch between PAL and NTSC. I'm pretty confident with this version, but hey, I've been surprised/disappointed in the past...

    Caveats:
    - The system DOES require you turn it off before switching.
    - There is currently no way to switch without the case open.
    - This board is ONLY for 250407 motherboards.
    - Desoldering and removal of components is required (quartz crystal, jumpers, R27 trim resistor), and replacement with header pins (still don't know if they'll be male or female yet).
    - Not sure, but the big electrolytic capacitor might still need to be moved to the bottom of the board. I moved it previously for an earlier version that was too big to fit.

    I'll post a picture and maybe some video on my Twitter feed (@1stage) as it happens, later tonight, Pacific Time, but I don't want to miss the finale of Masked Singer, so... you know, priorities...

    - Sean

  3. #93

    Default

    I am interested in buying one of these boards!

  4. #94
    1stage's Avatar
    Join Date
    Sep 2018
    Country
    United States
    Region:
    Woodland Hills, CA
    Posts
    7
    Feedback
    0

    Default

    Quick update:
    - We're testing the final candidate boards. They work but we need to make sure our installation instructions are clear, correct, and concise.
    - It is a single-board solution (not two as previously mentioned), but there will be both a 250407 and a 250425/250466 version of the board. This accommodates the different location of the jumpers, crystals, and VIC-II sockets between the two motherboards.
    - Doesn't fit in a 64c-style case at this time. Sorry. Not a lot of head room, so breadbin cases only for now.
    - Doesn't require a case mod. The switch can be trailed out the RF channel switch hole without interrupting it's function.
    - Only switches modes AFTER power is turned off, and you can keep it in whichever "default" mode you want. BUT, you must power off. A soft reset won't do it (latching relays).

    More news soon!
    Last edited by 1stage; 15th May 2019 at 04:50.

  5. #95
    Making amigos with other Amigas amigo-mexicano's Avatar
    Join Date
    Mar 2008
    Country
    Mexico
    Region:
    Mexico City
    Posts
    838
    Feedback
    40 (100%)

    Default

    How exciting, it's almost ready! Interested in one board, please put me in the list, thanks!

    *UPDATE*

    I already expressed interest back in September 2018. Haha! Thanks to the past me!
    Last edited by amigo-mexicano; 15th May 2019 at 19:38.
    From Mexico City: Amigo-Mexicano! - Making Amigos with other Amigas
    Plus4 | C116 | C16 | C64 & UK1541 | C64C & RetroReplay/RRNet | SX-64 | C128
    A500 | A500+ & ACA500+ | Black A500+ & Viper 520CD | A600 | A1200 & Blizzard PPC | A2000 | A3000T | CD32

  6. #96
    Retro YouTuber Starglider's Avatar
    Join Date
    Apr 2014
    Country
    US&A
    Region:
    CA
    Posts
    495
    Feedback
    4 (83%)

    Default

    Quote Originally Posted by amigo-mexicano View Post
    How exciting, it's almost ready! Interested in one board, please put me in the list, thanks!

    *UPDATE*

    I already expressed interest back in September 2018. Haha! Thanks to the past me!
    Putting you down for 2 boards
    Starglider aka Perifractic

    "Recordar es vivir" | Remembering is living

  7. #97
    wolfsoft's Avatar
    Join Date
    Mar 2018
    Country
    Germany
    Region:
    Rheinland-Pfalz
    Age
    51
    Posts
    3
    Feedback
    0

    Default

    Please put me on the list with two boards.

    Hope it will work on a PAL C64 unit too, to make it switchable to NTSC ?

    Thanks for the great effords.

  8. #98
    Retro YouTuber Starglider's Avatar
    Join Date
    Apr 2014
    Country
    US&A
    Region:
    CA
    Posts
    495
    Feedback
    4 (83%)

    Default

    Quote Originally Posted by wolfsoft View Post
    Hope it will work on a PAL C64 unit too, to make it switchable to NTSC ?

    Thanks for the great effords.
    That's the plan!
    Starglider aka Perifractic

    "Recordar es vivir" | Remembering is living

  9. #99
    rasch_C's Avatar
    Join Date
    May 2019
    Country
    USA
    Region:
    WI
    Age
    39
    Posts
    1
    Feedback
    0

    Default

    I am interested in one kit as well for my 250425 board.

    Thank you,
    Allen

    Sent from my Pixel 2 using Tapatalk

Page 10 of 10 FirstFirst ... 678910

Similar Threads

  1. Replies: 14
    Last Post: 21st May 2016, 01:24
  2. Wanted Fully Socketed NTSC C64c Short Board
    By ziggystar12 in forum Commodore
    Replies: 0
    Last Post: 20th April 2016, 17:14
  3. Wanted C64c NTSC mother board only
    By ChrisUnionNJ in forum Commodore
    Replies: 2
    Last Post: 24th September 2015, 16:03

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •