PowerGraph VGA out of range

Page 2/2
1 |

By o.geerdink

Hero (585)

o.geerdink's picture

11-03-2020, 06:22

Can I connect a sunrise gfx9000 to a vga monitor?

By Metalion

Paragon (1447)

Metalion's picture

11-03-2020, 08:09

o.geerdink wrote:

Can I connect a sunrise gfx9000 to a vga monitor?

Only if your VGA monitor supports a 15KHz video signal ... Which is quite rare.
VGA monitors are based on 31KHz video signal inputs, which is necessary to display high resolutions.

By Latok

msx guru (3836)

Latok's picture

11-03-2020, 08:25

https://www.amazon.com/AllAboutAdapters-15Khz-RGsB-Converter...

With this scaler, I think you can.... Because the sunrise gfx9000 has cga output, you also need the seperately sold cga---->>15pin din cable...

By ssfony

Expert (78)

ssfony's picture

11-03-2020, 19:48

On the gfx9000 from sunrise, you need to add some extra stuff for the correct sync signals. I got the info about it somewhere in a big pile of emails from more than 25 years ago...
Anyway, it’s not just going to work without soldering. No cable or monitor will fix it.
I also remember breaking my multiscan vga monitor by trying...

By mohai

Paladin (932)

mohai's picture

12-03-2020, 13:47

If I am not wrong, V9990 is able to show some "high resolution" modes that use higher frequency than 15 Khz.
I guess that a regular VGA monitor is used only for those modes.

By ducasp

Champion (462)

ducasp's picture

12-03-2020, 14:47

mohai wrote:

If I am not wrong, V9990 is able to show some "high resolution" modes that use higher frequency than 15 Khz.
I guess that a regular VGA monitor is used only for those modes.

To use the VGA 31Khz 16 colors compatible mode (B6) the crystal should be different than the one used on all MSX adapters using V9990, so it is not possible to use it with Power Graph, GFX 9000, etc...

By Parn

Hero (652)

Parn's picture

12-03-2020, 14:57

mohai wrote:

If I am not wrong, V9990 is able to show some "high resolution" modes that use higher frequency than 15 Khz.

You're not wrong, but neither GFX9000 nor current clones have the necessary circuitry for the VGA-compatible 640x480 graphics mode. The other high resolution mode, 640x400, requires a monitor that supports 21.5KHz horizontal frequency, which is not as easy to find.

By The Apeman

Master (153)

The Apeman's picture

16-10-2020, 16:42

Latok wrote:

https://www.amazon.com/AllAboutAdapters-15Khz-RGsB-Converter-Scaler/dp/B074GC2K2F

With this scaler, I think you can.... Because the sunrise gfx9000 has cga output, you also need the seperately sold cga---->>15pin din cable...

That scaler uses a 15 pin Sub-D input plug. So will that also work for a Powergraph Light?

By The Apeman

Master (153)

The Apeman's picture

18-11-2020, 14:36

The Apeman wrote:
Latok wrote:

https://www.amazon.com/AllAboutAdapters-15Khz-RGsB-Converter-Scaler/dp/B074GC2K2F

With this scaler, I think you can.... Because the sunrise gfx9000 has cga output, you also need the seperately sold cga---->>15pin din cable...

That scaler uses a 15 pin Sub-D input plug. So will that also work for a Powergraph Light?

It does give a signal, but the colours are off. It's too pink. I also see blue, but that's it. Could it be because I'm using two VGA cables? Since both the scaler and the Powergraph Light have 15pin connections, that's what I thought was right.

Page 2/2
1 |