I also replaced the ribbon on mine, it was pretty terrible, but it didn't seem to help with the flickering issue.raspberrypioneer wrote: Sun Oct 26, 2025 9:12 amI've fixed this 100% now! I replaced the ribbon cable connector on the power board. It seemed fine so I left it in place (did a half-jobrubber_jonnie wrote: Sun Oct 19, 2025 11:49 am Glad to see you got over the line
It is a weird thing with these machines that flickering. I don't believe it's capacitors and my voltages are all good, but at least it's resolving quicker now.). I also gave all the boards a thorough clean with IPA and reflowed a few connections which didn't look 'nice' (although were probably ok). On powering up, no flicker at all, the picture is perfect (composite perfect
). Really pleased with this now, next up a 3d print for the Pirto cart.
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You may inadvertently get banned because a previous attack may have used the IP you are now on.
So I suggest people only use fixed IP address devices until I can think of a solution for this problem!
Intellivision Board details
- rubber_jonnie
- Site Admin

- Posts: 13639
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Re: Intellivision Board details
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
-
raspberrypioneer
- Posts: 50
- Joined: Mon Jun 16, 2025 9:31 pm
Re: Intellivision Board details
Is it the top line that flickers? I get that on the TV I used to use. Fine on the 'new' one - I guess yours is sorted with the Retrotink?rubber_jonnie wrote: Sun Oct 26, 2025 2:40 pm I also replaced the ribbon on mine, it was pretty terrible, but it didn't seem to help with the flickering issue.
- rubber_jonnie
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- Joined: Thu Aug 17, 2017 7:40 pm
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Re: Intellivision Board details
So, I have stopped using it with a little 10" display as it always plays up with that, though my Colecovision is 100% perfect.raspberrypioneer wrote: Mon Oct 27, 2025 11:14 amIs it the top line that flickers? I get that on the TV I used to use. Fine on the 'new' one - I guess yours is sorted with the Retrotink?rubber_jonnie wrote: Sun Oct 26, 2025 2:40 pm I also replaced the ribbon on mine, it was pretty terrible, but it didn't seem to help with the flickering issue.
As it goes it is mostly fine with the Retrotink now IIRC and a TV rather than my bench display.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
- rubber_jonnie
- Site Admin

- Posts: 13639
- Joined: Thu Aug 17, 2017 7:40 pm
- Location: Essex
- Contact:
Re: Intellivision Board details
I just tried Sonic on it, and it is impressive for sure, didn't even realise the C64 could emulate an REU until you mentioned it.raspberrypioneer wrote: Tue Oct 21, 2025 12:12 pm
Ha, same as my daughter! It will be good to know how you get on - the Sonic the Hedgehog game uses extra memory / REU. An impressive game on the C64 if you've not tried it. I've played it using VICE / RetroPie, but not on my real C64.
I also found this: Rad Expansion Unit which is a modern recreation and may be worth trying to build
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
-
raspberrypioneer
- Posts: 50
- Joined: Mon Jun 16, 2025 9:31 pm
Re: Intellivision Board details
I've never tried a REU on a real C64, I don't think I knew they existed until Sonic was released fairly recentlyrubber_jonnie wrote: Tue Oct 28, 2025 6:35 pm I just tried Sonic on it, and it is impressive for sure, didn't even realise the C64 could emulate an REU until you mentioned it.
I also found this: Rad Expansion Unit which is a modern recreation and may be worth trying to build![]()
It looks an interesting project. Adds an extra 16mb too! Mind would have boggled as a kid - would probably have needed to look up what that was. Soldering the surface mounted components would be new territory for me. I'd probably need a better soldering setup, it's fiddly enough with regular components!
- rubber_jonnie
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- Joined: Thu Aug 17, 2017 7:40 pm
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Re: Intellivision Board details
I'm pretty good with tiny surface mount stuff, I could alway build a batch and sell you oneraspberrypioneer wrote: Wed Oct 29, 2025 9:47 amI've never tried a REU on a real C64, I don't think I knew they existed until Sonic was released fairly recentlyrubber_jonnie wrote: Tue Oct 28, 2025 6:35 pm I just tried Sonic on it, and it is impressive for sure, didn't even realise the C64 could emulate an REU until you mentioned it.
I also found this: Rad Expansion Unit which is a modern recreation and may be worth trying to build![]()
![]()
It looks an interesting project. Adds an extra 16mb too! Mind would have boggled as a kid - would probably have needed to look up what that was. Soldering the surface mounted components would be new territory for me. I'd probably need a better soldering setup, it's fiddly enough with regular components!![]()
The smallest I've done is 0402 on my v2 Analog for my Apple IIe. I have a better microscope now too
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
-
raspberrypioneer
- Posts: 50
- Joined: Mon Jun 16, 2025 9:31 pm
Re: Intellivision Board details
Sounds like a microscope and surgeon-like hand movements are essential!rubber_jonnie wrote: Wed Oct 29, 2025 4:46 pm I'm pretty good with tiny surface mount stuff, I could alway build a batch and sell you one
The smallest I've done is 0402 on my v2 Analog for my Apple IIe. I have a better microscope now too![]()
Not sure I'd use a REU much beyond the occasional game of C64 Sonic the Hedgehog (used to own that game with a MegaDrive I used to have but annoyingly sold a long time ago
What do you think of your The C64 compared to the original?
PS. I see your emojis display properly?!
- rubber_jonnie
- Site Admin

- Posts: 13639
- Joined: Thu Aug 17, 2017 7:40 pm
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Re: Intellivision Board details
Yeah they certainly are. I have a better microscope since I built the Analog v2. Sneezing is not helpful when working with things that small either...raspberrypioneer wrote: Thu Oct 30, 2025 2:26 pm Sounds like a microscope and surgeon-like hand movements are essential!Seen a few YT videos which make it look easy as they tend to.
Well i might build one for fun, see if I can get Sonic working on 'real' hardware, but other than that, yep it's a bit of a fringe item.raspberrypioneer wrote: Thu Oct 30, 2025 2:26 pm Not sure I'd use a REU much beyond the occasional game of C64 Sonic the Hedgehog (used to own that game with a MegaDrive I used to have but annoyingly sold a long time ago). There doesn't seem to be much which uses it, I guess it's a bit of a fringe item.
The keyboard isn't as nice, but overall it's OK and a nice option to have since it is easier to set up than the C64 and will work great with HDMI, not to mention it also works as a VIC-20 as well.raspberrypioneer wrote: Thu Oct 30, 2025 2:26 pm What do you think of your The C64 compared to the original?
PS. I see your emojis display properly?!
I've not generally had any issues with emojis.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...