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PAL Mod on Rev 1 NTSC VIC 20?
Posted: Mon Mar 10, 2025 6:58 am
by gordonf
I read that the Revision 1 VIC 20s have separate NTSC and PAL versions, with the PAL ones sporting extra traces on the board. The Revision 2 boards were more harmonized so it was possible to have either video standard on them depending on the crystal and 6560 / 6561 IC used.
I only have spare Rev 1 boards and I want to convert one of them to PAL and S-Video. I found this on Zimmers:
https://www.zimmers.net/anonftp/pub/cbm ... -NTSC.html
So I can see the Rev 1 conversion from PAL to NTSC. Do I just perform the reverse of this to go from NTSC to PAL?
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Re: PAL Mod on Rev 1 NTSC VIC 20?
Posted: Wed Mar 19, 2025 12:17 pm
by Orangeman96
I reckon there is a large body of knowledge already accessible here available via the [Search... ] box with the magnifying glass to the right of it above. GOOD LUCK! -OGM
Re: PAL Mod on Rev 1 NTSC VIC 20?
Posted: Wed Mar 19, 2025 12:52 pm
by TheVic20User
gordonf wrote: ↑Mon Mar 10, 2025 6:58 am
I read that the Revision 1 VIC 20s have separate NTSC and PAL versions, with the PAL ones sporting extra traces on the board. The Revision 2 boards were more harmonized so it was possible to have either video standard on them depending on the crystal and 6560 / 6561 IC used.
I only have spare Rev 1 boards and I want to convert one of them to PAL and S-Video. I found this on Zimmers:
https://www.zimmers.net/anonftp/pub/cbm ... -NTSC.html
So I can see the Rev 1 conversion from PAL to NTSC. Do I just perform the reverse of this to go from NTSC to PAL?
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Personally, I think such conversions are just too bad. I would also like to get hold of an NTSC device, but you don't really get it in this country. I would like to exchange my working fully equipped PAL board for NTSC board.
Re: PAL Mod on Rev 1 NTSC VIC 20?
Posted: Thu Mar 20, 2025 7:26 am
by gordonf
TheVic20User wrote: ↑Wed Mar 19, 2025 12:52 pm
I would like to exchange my working fully equipped PAL board for NTSC board.
If you're serious about this I'll consider it. I have to get my NTSC board working first - the VIC 20 was recovered from a cat-infested location.
What revision of PAL board are you considering swapping? If it's a Rev 2 board I'll need the RF shield underside as well so it will mount in a case.
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Re: PAL Mod on Rev 1 NTSC VIC 20?
Posted: Thu Mar 20, 2025 1:30 pm
by TheVic20User
If the board works, I would do it. I have the original first PAL board with 2pin plug. However, I come from Germany. Unfortunately, I don't know what the shipping costs would be. And if it would be worth it for us.