Search found 23 matches
- Wed Feb 07, 2024 3:02 pm
- Forum: Programming
- Topic: Recommendations for VIC-20 assembly tutorial, tools
- Replies: 10
- Views: 1891
Re: Recommendations for VIC-20 assembly tutorial, tools
Thank you for all of the replies! I greatly appreciate it! It is a strange motivation to learn assembly, but it ignited the fire just the same. To be specific, I have a copy of some VIC 20 Diagnostic firmware that has a bug when it comes to determining how to display on the screen (I get odd colors)...
- Sun Jan 28, 2024 12:39 pm
- Forum: Programming
- Topic: Recommendations for VIC-20 assembly tutorial, tools
- Replies: 10
- Views: 1891
Recommendations for VIC-20 assembly tutorial, tools
I'm new to assembly language, and I would like to learn it for the VIC-20. I have some source code that I would like to examine to see if I can find a bug(s) that is present (I didn't write the code). Before I can do that, I need to learn assembly for the VIC-20, and I need a recommendation on a goo...
- Tue Aug 01, 2023 12:39 pm
- Forum: Hardware and Tech
- Topic: Video noise on VIC-20
- Replies: 51
- Views: 12803
Re: Video noise on VIC-20
Here's where I purchased mine for my VIC 20's and C64's that I have. I could tell the difference immediately from my regular composite cables I was using.
https://www.ebay.com/itm/165784501517?h ... Swa5RgAQOO
Joe
https://www.ebay.com/itm/165784501517?h ... Swa5RgAQOO
Joe
- Mon Jul 31, 2023 3:55 pm
- Forum: Hardware and Tech
- Topic: Vic-20 Donor Board Problem ?
- Replies: 10
- Views: 3644
Re: Vic-20 Donor Board Problem ?
Great job!
- Mon Jul 31, 2023 2:13 pm
- Forum: Hardware and Tech
- Topic: Screws
- Replies: 1
- Views: 2930
Re: Screws
Thank you! Very timely. Since I've repaired all of my C64's and VIC-20's, it's time to repair the cases.
Joe
Joe
- Thu Jul 27, 2023 3:22 pm
- Forum: Hardware and Tech
- Topic: Video noise on VIC-20
- Replies: 51
- Views: 12803
Re: Video noise on VIC-20
That's the word I was looking for at the time! Shielding!
Joe
Joe
- Mon Jul 24, 2023 3:29 pm
- Forum: Hardware and Tech
- Topic: 2114 static RAM tester by Carsten Skjerk
- Replies: 1
- Views: 2883
2114 static RAM tester by Carsten Skjerk
This tester is mentioned in another post. After visiting the associated Github site, I can't see all of the connections on the breadboard. Does anyone know the breadboard hole assignment for the corresponding wires? Some are obvious, others are not. Yes, I'm a newbie on Arduino things.
Thank you
Joe
Thank you
Joe
- Mon Jul 24, 2023 3:00 pm
- Forum: Hardware and Tech
- Topic: Video noise on VIC-20
- Replies: 51
- Views: 12803
Re: Video noise on VIC-20
I had a similar issue with my VIC-20 and C-64. I ordered a new cable with stronger insulation, and the issue went away. The cable for the video (yellow connector) is very thick on the new one.
Joe
Joe
- Mon Jul 24, 2023 2:56 pm
- Forum: Hardware and Tech
- Topic: Testing VIC 20 ROMs
- Replies: 11
- Views: 3769
Re: Testing VIC 20 ROMs
I'd enjoy seeing the posts. I'm out of commission for working on computers for a while. I tore my right shoulder rotator cuff. Hopefully all I'll need is therapy, and not surgery. I'll find out in a few days.
The Arduino chip tester looks interesting.
Joe
The Arduino chip tester looks interesting.
Joe
- Thu Jul 20, 2023 9:44 pm
- Forum: Hardware and Tech
- Topic: Testing VIC 20 ROMs
- Replies: 11
- Views: 3769
Re: Testing VIC 20 ROMs
No problem! You're not being VICious.
- Thu Jul 20, 2023 3:37 pm
- Forum: Hardware and Tech
- Topic: Testing VIC 20 ROMs
- Replies: 11
- Views: 3769
Re: Testing VIC 20 ROMs
VICtory! I found a missing connection, installed a bodge wire, and it booted up!
Joe
Joe
- Thu Jul 20, 2023 3:36 pm
- Forum: Hardware and Tech
- Topic: VIC 20 - Black Screen that's really fighting me
- Replies: 12
- Views: 3521
Re: VIC 20 - Black Screen that's really fighting me
I found it! When I replaced the chip and installed a socket for the 74LS245 at UF8, pin 1 apparently lost a trace to UC3 pin 2 during the process. I had a feeling it had to do with something from my previous pulling up traces problems. I connected a bodge wire from one pin to the other on the back o...
- Thu Jul 20, 2023 1:37 pm
- Forum: Hardware and Tech
- Topic: VIC 20 - Black Screen that's really fighting me
- Replies: 12
- Views: 3521
Re: VIC 20 - Black Screen that's really fighting me
Thank you for the link! I did put the missing "o" on the "inf" portion of the link to get there. I appreciate the offer on the board, and we'll see what the future holds. I don't surrender well at all to problems. As for Denmark, I actually do have Danish blood from my mom's side...
- Thu Jul 20, 2023 11:51 am
- Forum: Hardware and Tech
- Topic: Testing VIC 20 ROMs
- Replies: 11
- Views: 3769
Re: Testing VIC 20 ROMs
The ROM's are fine. But I'm still working on the VICtim.
Joe
Joe
- Thu Jul 20, 2023 11:50 am
- Forum: Hardware and Tech
- Topic: VIC 20 - Black Screen that's really fighting me
- Replies: 12
- Views: 3521
Re: VIC 20 - Black Screen that's really fighting me
Great job! Thank you for letting me know about the scope screenshots. Let me know where I can find them when they're ready. I'm still fighting my VIC. I desoldered the CPU, tested it in the working VIC-20, and it's fine. So I installed a socket, and put it back in. So I'm tediously checking each tra...