TT030 VGA picture quality
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Re: TT030 VGA picture quality
Their web page is back.
Re: TT030 VGA picture quality
Good to hear!susher wrote:Their web page is back.
Last edited by dhedberg on Mon Sep 24, 2018 10:34 pm, edited 1 time in total.
Daniel, New Beat - http://newbeat.atari.org.
Like demos? Have a look at our new Falcon030 demo It's that time of the year again, or click here to feel the JOY.
Like demos? Have a look at our new Falcon030 demo It's that time of the year again, or click here to feel the JOY.
- Atari030
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Re: TT030 VGA picture quality
Has anyone tried a VGA-HDMI adapter on a TT?
Re: TT030 VGA picture quality
Nope, but the sampling of TT's signal will still be a problem. The picture will still be "off". The OSSC will take VGA and output HDMI and let you adjust the sampling to match the pixel clock of the TT.Atari030 wrote:Has anyone tried a VGA-HDMI adapter on a TT?
Daniel, New Beat - http://newbeat.atari.org.
Like demos? Have a look at our new Falcon030 demo It's that time of the year again, or click here to feel the JOY.
Like demos? Have a look at our new Falcon030 demo It's that time of the year again, or click here to feel the JOY.
Re: TT030 VGA picture quality
Yes, it has the same problem as other devices which sample the signal at precisely the resolution it believes it should be (rather than sampling the scan line at double the frequency and then averaging pixels), i.e. is misses most of the data in the TT's output as it's stuffed in the first two thirds of the scan line.Atari030 wrote:Has anyone tried a VGA-HDMI adapter on a TT?
- Atari030
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Re: TT030 VGA picture quality
I thought as much. I was just thinking, rather than figuring a VGA solution, in this day and age a DVI one would be ideal. Especially if it could handle ECL input as well.
Wishful thinking, I guess.
Wishful thinking, I guess.
Re: TT030 VGA picture quality
Like previously stated, the OSSC will take VGA in and output HDMI and give you a lot of control over how the analog signal is converted to digital. It's not cheap but it has a lot of different inputs so it can be used with basically any old computer or video game console.Atari030 wrote:I thought as much. I was just thinking, rather than figuring a VGA solution, in this day and age a DVI one would be ideal. Especially if it could handle ECL input as well.
Wishful thinking, I guess.
Daniel, New Beat - http://newbeat.atari.org.
Like demos? Have a look at our new Falcon030 demo It's that time of the year again, or click here to feel the JOY.
Like demos? Have a look at our new Falcon030 demo It's that time of the year again, or click here to feel the JOY.
Re: TT030 VGA picture quality
Well, as soon as the web site came up on Monday I ordered and OSSC and it arrived today.
I've so far managed to get a nice display, despite there being no instructions. However I've yet to find out how to stretch the display horizontally and centre it and also to shift the display down so that the top few pixels are viewable. Otherwise it's amazingly good.
See:

I've so far managed to get a nice display, despite there being no instructions. However I've yet to find out how to stretch the display horizontally and centre it and also to shift the display down so that the top few pixels are viewable. Otherwise it's amazingly good.
See:

Re: TT030 VGA picture quality
I've now found the optimum settings for all the display modes (the timing for ST Low & TT Medium slightly change re: "sample rate").
Sampling opt>
640x480 Adv Timing>
H.samplerate: 1023
H.backporch: 128
V.backporch: 29
Allow upsample2x: on
Output opt>
480p/576p proc>
Line 2x
Sample images (iPhone doesn't get the quality you see):
TT Medium

ST High

ST Medium

ST Low

Sampling opt>
640x480 Adv Timing>
H.samplerate: 1023
H.backporch: 128
V.backporch: 29
Allow upsample2x: on
Output opt>
480p/576p proc>
Line 2x
Sample images (iPhone doesn't get the quality you see):
TT Medium

ST High

ST Medium

ST Low

Re: TT030 VGA picture quality
Yup, that's it! You got it! Isn't it nice? That thing is awesome!
Daniel, New Beat - http://newbeat.atari.org.
Like demos? Have a look at our new Falcon030 demo It's that time of the year again, or click here to feel the JOY.
Like demos? Have a look at our new Falcon030 demo It's that time of the year again, or click here to feel the JOY.
Re: TT030 VGA picture quality
Just to add to this, my OSSC was used on the STe and got a perfectly (well stretched) widescreen picture on my 55" TV. But also I have my Jaguar and Sega Genesis/CD hooked up through SCART on it. Overall, an excellent piece of hardware.
Atari 8Bits: 800xl, 600xl, XEGS, 800, 130xe, 130xe (VBXE, U1MB, Stereo POKEY)
Atari STs: 1040STf (broken shifter), 1040STe, Mega STe, TT030, Falcon (CT60e, SuperVidel)
Atari STs: 1040STf (broken shifter), 1040STe, Mega STe, TT030, Falcon (CT60e, SuperVidel)
Re: TT030 VGA picture quality
Wow... very nice albeit expensive £162.00 but well worth itsusher wrote:I've now found the optimum settings for all the display modes (the timing for ST Low & TT Medium slightly change re: "sample rate").
Sampling opt>
640x480 Adv Timing>
H.samplerate: 1023
H.backporch: 128
V.backporch: 29
Allow upsample2x: on
Output opt>
480p/576p proc>
Line 2x
Sample images (iPhone doesn't get the quality you see):
that's nearly half the price of my tt
My Stuff: FB/Falcon CT63 CTPCI ATI RTL8139 USB 512MB 30GB HDD CF HxC_SD/ TT030 68882 4+32MB 520MB Nova/ 520STFM 4MB Tos206 SCSI
Shared SCSI Bus:ScsiLink ethernet, 9GB HDD,SD-reader @ http://phsw.atari.org
My Atari stuff for sale - click here for list
Shared SCSI Bus:ScsiLink ethernet, 9GB HDD,SD-reader @ http://phsw.atari.org
My Atari stuff for sale - click here for list
Re: TT030 VGA picture quality
I just went and ordered an OSSC after seeing your photos guys, thanks lol 

Falcon CT60e 060 - 256mb ram - Phantom bus and DSP accelerated // Atari TT - Thunder and Storm IDE 64mb ram - Lightning VME - USB LAN - ATI Mach64 2mb
Re: TT030 VGA picture quality
Hey man, I got my OSSC but these settings don't work for me. I get to H.samplerate 955 and anything higher just makes my monitor turn off. Any ideas? Thxsusher wrote:I've now found the optimum settings for all the display modes (the timing for ST Low & TT Medium slightly change re: "sample rate").
Sampling opt>
640x480 Adv Timing>
H.samplerate: 1023
H.backporch: 128
V.backporch: 29
Allow upsample2x: on
Output opt>
480p/576p proc>
Line 2x
Falcon CT60e 060 - 256mb ram - Phantom bus and DSP accelerated // Atari TT - Thunder and Storm IDE 64mb ram - Lightning VME - USB LAN - ATI Mach64 2mb
Re: TT030 VGA picture quality
what is the highest rez it can go? I run ECL to VGA adapter for high res mono on Cubase. I found a good 21inch CRT and the picture is really sharp and fine. Here link on facebook group you can see it in action in my studio. https://www.facebook.com/filmtoolslinz/ ... 161706799/
Re: TT030 VGA picture quality
Try a different monitor?mzry wrote:Hey man, I got my OSSC but these settings don't work for me. I get to H.samplerate 955 and anything higher just makes my monitor turn off. Any ideas? Thxsusher wrote:I've now found the optimum settings for all the display modes (the timing for ST Low & TT Medium slightly change re: "sample rate").
Sampling opt>
640x480 Adv Timing>
H.samplerate: 1023
H.backporch: 128
V.backporch: 29
Allow upsample2x: on
Output opt>
480p/576p proc>
Line 2x

Daniel, New Beat - http://newbeat.atari.org.
Like demos? Have a look at our new Falcon030 demo It's that time of the year again, or click here to feel the JOY.
Like demos? Have a look at our new Falcon030 demo It's that time of the year again, or click here to feel the JOY.
Re: TT030 VGA picture quality
Interesting.mzry wrote:Hey man, I got my OSSC but these settings don't work for me. I get to H.samplerate 955 and anything higher just makes my monitor turn off. Any ideas? Thxsusher wrote:I've now found the optimum settings for all the display modes (the timing for ST Low & TT Medium slightly change re: "sample rate").
Sampling opt>
640x480 Adv Timing>
H.samplerate: 1023
H.backporch: 128
V.backporch: 29
Allow upsample2x: on
Output opt>
480p/576p proc>
Line 2x
Is this a monitor using an HDMI to DVI adapter by any chance?
I am using a FullHD TV connected by HDMI (probably version 1.2).
Re: TT030 VGA picture quality
to check for poor associations, however would someone be able to let me know whether this is typical? The screen works fine on a ST in high-rez mode (utilizing a connector), since it is mature enough to have the capacity to sync directly down to 60hz. I truly would prefer not to send it back as broken... since they are so uncommon...Cyprian wrote:Ditto, I also have an old LCD and same as DarkLord, I use the controls to center and stretch TT desktop screen horizontally.
this is an 'official' story.wongck wrote:It is unfortunate that the VGA specifications changed after the TT came out.
So the VGA output will not be looking "correct" against the standard spec.
unofficial story is that was done on purpose. TT video pixel clock is generated from main clock, in order to have synchronized main memory bus with TT Shifter. I guess it is done in that way due to cost cutting.
Finally TT pixel clock is 32MHz, and is higher than VGA standard - 25MHz.
VGA horizontal frequency is fixed at ~31.468 kHz and with TT 32MHz video pixel clock, every line has 1024 pixels (in ST MID/HIGH / TT MID mode), 640 pixels are for desktop and 384 are border.
TT 32MHz / 31.5 kHz = 1024 pixels: 640px screen + 384px border
VGA 25MHz / 31.5 kHz = 800 pixels: 640px screen + 160px border Notepad++ Malwarebytes FileZilla
Therefore TT architecture just forces VGA to show so huge border. That issue is fixed in Falcon, it uses 32MHz for TV mode and 25MHz for VGA mode.
Last edited by azzyish12 on Sat Oct 13, 2018 5:51 pm, edited 1 time in total.
Re: TT030 VGA picture quality
Ok I'll try a different monitor. Although this is a 'sampling option' so it should not effect the digital output, my logical brain tells me 

Falcon CT60e 060 - 256mb ram - Phantom bus and DSP accelerated // Atari TT - Thunder and Storm IDE 64mb ram - Lightning VME - USB LAN - ATI Mach64 2mb
Re: TT030 VGA picture quality
Mine is a bit more low tech. It’s a crappy old 15 inch VGA monitor with digital controls
The controls remember their state per screen mode. I use them to adjust the position etc of the screen. The monitor doesn’t half make a noise when you turn it on though!

Re: TT030 VGA picture quality
Cyprian wrote:Ditto, I also have an old LCD and same as DarkLord, I use the controls to center and stretch TT desktop screen horizontally.
this is an 'official' story.wongck wrote:It is unfortunate that the VGA specifications changed after the TT came out.
So the VGA output will not be looking "correct" against the standard spec.
unofficial story is that was done on purpose. TT video pixel clock is generated from main clock, in order to have synchronized main memory bus with TT Shifter. I guess it is done in that way due to cost cutting.
Finally TT pixel clock is 32MHz, and is higher than VGA standard - 25MHz.
VGA horizontal frequency is fixed at ~31.468 kHz and with TT 32MHz video pixel clock, every line has 1024 pixels (in ST MID/HIGH / TT MID mode), 640 pixels are for desktop and 384 are border.
TT 32MHz / 31.5 kHz = 1024 pixels: 640px screen + 384px border
VGA 25MHz / 31.5 kHz = 800 pixels: 640px screen + 160px border
Therefore TT architecture just forces VGA to show so huge border. That issue is fixed in Falcon, it uses 32MHz for TV mode and 25MHz for VGA mode.
Re: TT030 VGA picture quality
Just a late update, I finally got it working, as suggested I changed monitor. Thanks for the settings they're great!susher wrote:Interesting.mzry wrote:Hey man, I got my OSSC but these settings don't work for me. I get to H.samplerate 955 and anything higher just makes my monitor turn off. Any ideas? Thxsusher wrote:I've now found the optimum settings for all the display modes (the timing for ST Low & TT Medium slightly change re: "sample rate").
Sampling opt>
640x480 Adv Timing>
H.samplerate: 1023
H.backporch: 128
V.backporch: 29
Allow upsample2x: on
Output opt>
480p/576p proc>
Line 2x
Is this a monitor using an HDMI to DVI adapter by any chance?
I am using a FullHD TV connected by HDMI (probably version 1.2).
Falcon CT60e 060 - 256mb ram - Phantom bus and DSP accelerated // Atari TT - Thunder and Storm IDE 64mb ram - Lightning VME - USB LAN - ATI Mach64 2mb