You will not be able to post if you are still using Microsoft email addresses such as Hotmail etc
See here for more information viewtopic.php?f=20&t=7296
See here for more information viewtopic.php?f=20&t=7296
DO NOT USE DEVICES WHERE THE IP CHANGES CONSTANTLY!
At this time it is unfortunately not possible to white list users when your IP changes constantly.
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!
At this time it is unfortunately not possible to white list users when your IP changes constantly.
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!
520ST With Bad "Jailbars" On Video Output
Re: 520ST With Bad "Jailbars" On Video Output
The video DAC is as good as things can be. If you want a better solution, you would be better getting a STFM.
Re: 520ST With Bad "Jailbars" On Video Output
Well, at the moment I'd rather need an information what to expect from transistors replacement as you mentioned in your article with certain improvement, not considering DAC VIDEO mode (maybe just not yet) 
- rubber_jonnie
- Site Admin

- Posts: 13809
- Joined: Thu Aug 17, 2017 7:40 pm
- Location: Essex
- Contact:
Re: 520ST With Bad "Jailbars" On Video Output
Nice to see you here @ctrl.alt.rees, I'm a frequent viewer of your channel 
FYI I can honestly say my STM has terrible jailbars on Low/Med res, and I have a modern PSU and the original RAM was replaced with a 4MB upgrade from @exxos, so fairly sure they aren't the culprits.
Interestingly, Hi res is just fine. This is testing via a VGA adapter BTW.
It does seem to be a fairly regular issue though, you're not alone.
FYI I can honestly say my STM has terrible jailbars on Low/Med res, and I have a modern PSU and the original RAM was replaced with a 4MB upgrade from @exxos, so fairly sure they aren't the culprits.
Interestingly, Hi res is just fine. This is testing via a VGA adapter BTW.
It does seem to be a fairly regular issue though, you're not alone.
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...
Re: 520ST With Bad "Jailbars" On Video Output
FYI @rubber_jonnie I doubt Rees is watching this thread since he opened it five years ago and hasn't been active since. @HCRX27 necroed the thread back to life 
- rubber_jonnie
- Site Admin

- Posts: 13809
- Joined: Thu Aug 17, 2017 7:40 pm
- Location: Essex
- Contact:
Re: 520ST With Bad "Jailbars" On Video Output
Haha, show how much I'm paying attention...Steve wrote: Tue Sep 16, 2025 12:58 pm FYI @rubber_jonnie I doubt Rees is watching this thread since he opened it five years ago and hasn't been active since. @HCRX27 necroed the thread back to life![]()
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...
Re: 520ST With Bad "Jailbars" On Video Output
Its also why I mentioned a while back that maybe we should install the extension to automatically lock threads after a year of inactivity to stop this sort of thing from happening..rubber_jonnie wrote: Tue Sep 16, 2025 1:15 pmHaha, show how much I'm paying attention...Steve wrote: Tue Sep 16, 2025 12:58 pm FYI @rubber_jonnie I doubt Rees is watching this thread since he opened it five years ago and hasn't been active since. @HCRX27 necroed the thread back to life![]()
- rubber_jonnie
- Site Admin

- Posts: 13809
- Joined: Thu Aug 17, 2017 7:40 pm
- Location: Essex
- Contact:
Re: 520ST With Bad "Jailbars" On Video Output
Sounds sensible to me.exxos wrote: Tue Sep 16, 2025 1:17 pmIts also why I mentioned a while back that maybe we should install the extension to automatically lock threads after a year of inactivity to stop this sort of thing from happening..
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...
Re: 520ST With Bad "Jailbars" On Video Output
What's wrong though with the thread, if this or similiar issue is a typical situation across different motherboards, yet there can be some differences? Is there a quota on the server? 
Anyway, that's how it looks on my machine.
I'll compare it after transistor replacement is done and share the result, so at least there will be more documented knowledge into it
Anyway, that's how it looks on my machine.
I'll compare it after transistor replacement is done and share the result, so at least there will be more documented knowledge into it
- Attachments
-
- 20250907_185630.jpg (149.49 KiB) Viewed 194 times
- rubber_jonnie
- Site Admin

- Posts: 13809
- Joined: Thu Aug 17, 2017 7:40 pm
- Location: Essex
- Contact:
Re: 520ST With Bad "Jailbars" On Video Output
You can't use external images I'm afraid, it's not permitted on the forum, you'll need to upload them and place inline in your post.HCRX27 wrote: Tue Sep 16, 2025 1:25 pm What's wrong though with the thread, if this or similiar issue is a typical situation across different motherboards, yet there can be some differences? Is there a quota on the server?
Anyway, that's how it looks on my machine:
I'll compare it after transistor replacement is done and share the result, so at least there will be more documented knowledge into it![]()
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...
Re: 520ST With Bad "Jailbars" On Video Output
@rubber_jonnie
Indeed, thank you. I was looking for, but somehow missed attachment option earlier on. Edited
Indeed, thank you. I was looking for, but somehow missed attachment option earlier on. Edited
