VGA Adaptor Question

Djay · 30 July 2010, 22:24

I've got a 22" Samsung LCD TV, which I use just for my A1200/A600...

at the moment I use my A1200 with an RGB Scart Cable, the screen has a slight wobble only noticeable when using Workbench (i don't see it when playing games)

my question is has anyone used a basic VGA to RGB Video socket adaptor with their machine... and if so are they happy with its performance?

http://amigakit.leamancomputing.com/...roducts_id=183

prowler · 30 July 2010, 23:03

Hi Djay,

I have a 19-inch Toshiba LCD HDTV, which I use with my Amigas via RGB to SCART and my PCs via VGA.

I also have a couple of those basic RGB to VGA adaptors, so I'll give that a try next time I fire up my A1200 (tomorrow morning, probably), and let you know what I think.

fitzsteve · 30 July 2010, 23:34

You might be lucky for it to work, if your TV in VGA mode will sync down to 15hkz.

Luckily mine does its a 19in JVC HD TV but the picture does have noticable vertical lines.

Nothing has even come close to the picture I get on my 17in non HD LCD TV, via scart its absolutly amazing and sounds like Prowler was just as lucky with his Toshiba TV.

All I can say is give it a try but to get any decent improvment over Scart you might be looking at an Indivison AGA setup.

Steve.

prowler · 30 July 2010, 23:40

Quote:

Originally Posted by fitzsteve

You might be lucky for it to work, if your TV in VGA mode will sync down to 15hkz.

Luckily mine does its a 19in JVC HD TV but the picture does have noticable vertical lines.

Thanks for that report, Steve!

Now I know what I'm looking for.

Djay · 31 July 2010, 00:02

i have heard that if you mod an RGB Scart Lead it fixes problems that occur when using LCD TV.... anyone know where i can buy a pre-modded lead or if someone can fix mine

to be honest, the problem thats on mine isnt actually that bad... but i would like a razor sharp image if possible

also moving my A1200 to VGA, would allow me to use my A600 using RGB Scart instead of composite (yuck)

thanks for all your help guys!

prowler · 31 July 2010, 00:18

Quote:

Originally Posted by Djay

i have heard that if you mod an RGB Scart Lead it fixes problems that occur when using LCD TV.... anyone know where i can buy a pre-modded lead or if someone can fix mine

The RGB to SCART lead I was using previously for my Amigas with Commodore or Acorn CRT monitors and a Sony Trinitron CRT TV does a fine job with the Amigas and my new Toshiba LCD HDTV!

It has a quite simple schematic which I have posted here previously, but I'll post the details here again for you tomorrow.

Peter · 31 July 2010, 00:33

Its a long shot that those VGA adaptors will display all native Amiga screens isn't it?

You would see Workbench screens I guess depending on your workbench screen mode but you wouldn't be able to see and play Amiga PAL games would you??

prowler · 31 July 2010, 00:37

Wait and see!

fitzsteve · 31 July 2010, 00:41

Quote:

Originally Posted by Peter

Its a long shot that those VGA adaptors will display all native Amiga screens isn't it?

All the native and workbench screens work on my 19in JVC HD LCD with this adapter

But again I think I was very lucky

Hewitson · 31 July 2010, 06:07

Quote:

Originally Posted by Djay

also moving my A1200 to VGA, would allow me to use my A600 using RGB Scart instead of composite (yuck)

Just buy a scart switch..

prowler · 31 July 2010, 23:49

Quote:

Originally Posted by Djay

I've got a 22" Samsung LCD TV, which I use just for my A1200/A600...

...with an RGB Scart Cable, my question is has anyone used a basic VGA to RGB Video socket adaptor with their machine... and if so are they happy with its performance?

http://amigakit.leamancomputing.com/...roducts_id=183

This morning, as promised, I connected my new Toshiba 19-inch widescreen LCD HDTV to my Comodore Amiga 1200 via a Commodore 390882-01 RGB to VGA adaptor.

As soon as the Amiga was producing a video output, the screen displayed the message "Not Supported!". The message persisted even after the Amiga had booted to the Workbench at PAL High Res Laced, which is supported by the set through RGB to SCART.

Peter · 01 August 2010, 00:00

Thanks for the update prowler - thought it was a bit hit and miss... so that must mean that Steve's flat screen vga input must support 15hkz as stated - so some new flat screen TV's have the capability of doing this others don't - I wonder why some manufacturers still offer the screen modes as what else but old technology uses it?

Djay · 01 August 2010, 01:15

Quote:

Originally Posted by Peter

Thanks for the update prowler - thought it was a bit hit and miss... so that must mean that Steve's flat screen vga input must support 15hkz as stated - so some new flat screen TV's have the capability of doing this others don't - I wonder why some manufacturers still offer the screen modes as what else but old technology uses it?

probably Amiga fans

thanks guys for all your help

@prowler, i am a complete n00b when it comes to modding leads, etc if i were to buy a spare RGB lead and sent it to you, could you mod it for me... i am happy to pay any costs involved

prowler · 01 August 2010, 01:40

Hi Djay,

I'm sorry, I completely forgot about posting my RGB to SCART cable details! They really are quite simple. I've tried searching here for my previous post with those details, but it's eluded me.

I actually have my original notes in front of me, but it will take a while to get them ready for posting, so it'll have to be tomorrow now.

Of course, if you really don't feel up to the job of modifying a cable, should it be needed, then I'll gladly do it for you.

Just let me know.

Edit: The slight wobble you mention when displaying Workbench on your LCD panel through RGB to SCART might be eliminated by adjusting the overscan settings. NTSC modes on my set were displayed with a slight wobble during testing, but the overscan badly needed adjusting and I didn't want to fiddle with it.

Djay · 01 August 2010, 02:47

i have noticed the wobble (and it is tiny) on dpaint aswell and on some static screens... i probably dont see it in games because the display is moving anyway

the strange thing is that sometimes it not there at all.. then it comes back.. i thought of interference, but i literally went round my house and turned everything off!

fitzsteve · 01 August 2010, 09:44

Quote:

Originally Posted by prowler

This morning, as promised, I connected my new Toshiba 19-inch widescreen LCD HDTV to my Comodore Amiga 1200 via a Commodore 390882-01 RGB to VGA adaptor.

As soon as the Amiga was producing a video output, the screen displayed the message "Not Supported!". The message persisted even after the Amiga had booted to the Workbench at PAL High Res Laced, which is supported by the set through RGB to SCART.

To be honest I wasn't expecting it to work on mine, I only tried as the scart picture on mine was in black and white.

Quote:

Originally Posted by Peter

Thanks for the update prowler - thought it was a bit hit and miss... so that must mean that Steve's flat screen vga input must support 15hkz as stated - so some new flat screen TV's have the capability of doing this others don't - I wonder why some manufacturers still offer the screen modes as what else but old technology uses it?

Looks like its completely luck of the draw becuase the manual says nothing about it supporting 15khz all the PC Modes mentioned are 31khz+

Quote:

Originally Posted by Djay

i have noticed the wobble (and it is tiny) on dpaint aswell and on some static screens... i probably dont see it in games because the display is moving anyway

the strange thing is that sometimes it not there at all.. then it comes back.. i thought of interference, but i literally went round my house and turned everything off!

Some screen modes have a slight wobble for me as well, full screen images like .jpg for example and the intro screens of some games.

I guess one day between us we will find the ultimate LCD TV for Amiga's but at least in some way all of ours work!

Steve.

Djay · 01 August 2010, 16:50

i am seriously considering getting an original monitor now! What was the best monitor (largest) monitor for Amiga

zipper · 01 August 2010, 19:10

Largest was Microvitec M1764/1704 - but far from best...

cosmicfrog · 01 August 2010, 19:48

prowler have you got the vgaonly monitor driver in your monitors draw ??

prowler · 01 August 2010, 20:04

Quote:

Originally Posted by cosmicfrog

prowler have you got the vgaonly monitor driver in your monitors draw ??

I don't know, mate. That machine's tied up transferring a load of ADF images to my Amiga emulator via Amiga Explorer right now, so I'll have a look when it's finished.

@Djay,

I've found the link to my post with details of my RGB to SCART cable.

Here it is!

This is the cable which now works flawlessly with my new Toshiba 19-inch Widescreen LCD HDTV!

Linky

30 July 2010, 22:24	#1
Djay 95th User Join Date: May 2001 Location: Brighton/UK Age: 48 Posts: 3,120	VGA Adaptor Question I've got a 22" Samsung LCD TV, which I use just for my A1200/A600... at the moment I use my A1200 with an RGB Scart Cable, the screen has a slight wobble only noticeable when using Workbench (i don't see it when playing games) my question is has anyone used a basic VGA to RGB Video socket adaptor with their machine... and if so are they happy with its performance? http://amigakit.leamancomputing.com/...roducts_id=183 Last edited by Djay; 30 July 2010 at 22:37.

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30 July 2010, 23:03	#2
prowler Global Moderator Join Date: Aug 2008 Location: Sidcup, England Posts: 10,300	Hi Djay, I have a 19-inch Toshiba LCD HDTV, which I use with my Amigas via RGB to SCART and my PCs via VGA. I also have a couple of those basic RGB to VGA adaptors, so I'll give that a try next time I fire up my A1200 (tomorrow morning, probably), and let you know what I think.

30 July 2010, 23:34	#3
fitzsteve Professional slacker! Join Date: Jul 2009 Location: Kent, UK Age: 44 Posts: 6,685	You might be lucky for it to work, if your TV in VGA mode will sync down to 15hkz. Luckily mine does its a 19in JVC HD TV but the picture does have noticable vertical lines. Nothing has even come close to the picture I get on my 17in non HD LCD TV, via scart its absolutly amazing and sounds like Prowler was just as lucky with his Toshiba TV. All I can say is give it a try but to get any decent improvment over Scart you might be looking at an Indivison AGA setup. Steve.

31 July 2010, 00:02	#5
Djay 95th User Join Date: May 2001 Location: Brighton/UK Age: 48 Posts: 3,120	i have heard that if you mod an RGB Scart Lead it fixes problems that occur when using LCD TV.... anyone know where i can buy a pre-modded lead or if someone can fix mine to be honest, the problem thats on mine isnt actually that bad... but i would like a razor sharp image if possible also moving my A1200 to VGA, would allow me to use my A600 using RGB Scart instead of composite (yuck) thanks for all your help guys!

31 July 2010, 00:33	#7
Peter Still an Amiga user Join Date: Nov 2006 Location: Kent Age: 55 Posts: 2,715	Its a long shot that those VGA adaptors will display all native Amiga screens isn't it? You would see Workbench screens I guess depending on your workbench screen mode but you wouldn't be able to see and play Amiga PAL games would you??

31 July 2010, 00:37	#8
prowler Global Moderator Join Date: Aug 2008 Location: Sidcup, England Posts: 10,300	Wait and see!

01 August 2010, 00:00	#12
Peter Still an Amiga user Join Date: Nov 2006 Location: Kent Age: 55 Posts: 2,715	Thanks for the update prowler - thought it was a bit hit and miss... so that must mean that Steve's flat screen vga input must support 15hkz as stated - so some new flat screen TV's have the capability of doing this others don't - I wonder why some manufacturers still offer the screen modes as what else but old technology uses it?

01 August 2010, 01:40	#14
prowler Global Moderator Join Date: Aug 2008 Location: Sidcup, England Posts: 10,300	Hi Djay, I'm sorry, I completely forgot about posting my RGB to SCART cable details! They really are quite simple. I've tried searching here for my previous post with those details, but it's eluded me. I actually have my original notes in front of me, but it will take a while to get them ready for posting, so it'll have to be tomorrow now. Of course, if you really don't feel up to the job of modifying a cable, should it be needed, then I'll gladly do it for you. Just let me know. Edit: The slight wobble you mention when displaying Workbench on your LCD panel through RGB to SCART might be eliminated by adjusting the overscan settings. NTSC modes on my set were displayed with a slight wobble during testing, but the overscan badly needed adjusting and I didn't want to fiddle with it.

01 August 2010, 02:47	#15
Djay 95th User Join Date: May 2001 Location: Brighton/UK Age: 48 Posts: 3,120	i have noticed the wobble (and it is tiny) on dpaint aswell and on some static screens... i probably dont see it in games because the display is moving anyway the strange thing is that sometimes it not there at all.. then it comes back.. i thought of interference, but i literally went round my house and turned everything off!

01 August 2010, 16:50	#17
Djay 95th User Join Date: May 2001 Location: Brighton/UK Age: 48 Posts: 3,120	i am seriously considering getting an original monitor now! What was the best monitor (largest) monitor for Amiga

01 August 2010, 19:10	#18
zipper Registered User Join Date: Mar 2004 Location: finland Posts: 1,841	Largest was Microvitec M1764/1704 - but far from best...

01 August 2010, 19:48	#19
cosmicfrog The 1 who ribbits Join Date: Apr 2006 Location: leek, Staffs, UK Age: 56 Posts: 3,557	prowler have you got the vgaonly monitor driver in your monitors draw ??

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