GBS-8220 Why not work Ami vga modes

[Marcin1982]

why not work in this chinese scandoubler ,  multiscan super72 euro72 and other Amiga vga modes?
PAL modes work excellent

[Ral-Clan]

Maybe because the GBS-8220 is meant to convert 15-16 KHz modes to 30-35 KHz modes?   When the Amiga is in VGA-only driver mode it's sending a 30KHz signal out of its RGB port.  The 8220 probably doesn't "understand" how to deal with a signal at that frequency.

[Marcin1982]

Maybe because the GBS-8220 is meant to convert 15-16 KHz modes to 30-35 KHz modes?   When the Amiga is in VGA-only driver mode it's sending a 30KHz signal out of its RGB port.  The 8220 probably doesn't "understand" how to deal with a signal at that frequency.

probably yes

[desiv]

I'm pretty sure that's it.
I've thought about wiring the Amiga into the RGB AND the VGA input (which I believe is just a passthru) of the GBS, but that would mean I'd have to use the GBS buttons to swap inputs (I think), and my GBS is cased with no button access and sitting behind my LCD.

Some type of auto switching would be nice, but that's not something the GBS is going to do by itself...

desiv

[gertsy]

it's meant to do 14.5-32.5khz as input.  So not sure that's the problem.

[desiv]

it's meant to do 14.5-32.5khz as input.  So not sure that's the problem.

You can input a VGA khz signal..
In the VGA plug that is basically a passthru.  ;-)

But as for the RGB inputs that get converted, it doesn't appear to like the higher ranges.

In fact, when you look at the manual, the only 15khz modes is says it works with is for CGA.  For RGB in the manual it lists 30.5-32.5.

Of course, we all know that it works with RGB lower at 15khz, but the specs don't specifically say it.

desiv

[ChaosLord]

why not work in this chinese scandoubler ,  multiscan super72 euro72 and other Amiga vga modes?

If your Amiga is already outputting a crystal clear noninterlaced, rock solid, 72Hz signal then why on Earth would you want to mess that signal up and braindamage it with a GBS?

What would be the point of downgrading a 72Hz beautiful image into a smeary blurry muddy 60hz image?

[Marcin1982]

but my monitor not work with "PAL" modes and amiga games works only in PAL
that i used gbs  . In games video is great in this chinese GBS but in system is wrong

[ChaosLord]

Its a lot easier to just buy a monitor that works with PAL 50hz and NTSC 60hz and 72hz and every other hz.

[AmmoJammo]

You can input a VGA khz signal..
In the VGA plug that is basically a passthru.  ;-)

But as for the RGB inputs that get converted, it doesn't appear to like the higher ranges.

the VGA socket isn't a pass though, its connected the same as the internal RGB header.

[AmigaClassicRule]

I wish I can make a movie in theater under genera of comedy under this topic lol

[gertsy]

the VGA socket isn't a pass though, its connected the same as the internal RGB header.

So any view AmmoJammmo as to why > 24khz doesn't work?

[AmmoJammo]

because its poo!

tried holding in the "auto" button for 3 seconds when in the 24Khz+ mode?

I know that going from pal, to ntsc, the gbs simply reports "no signal" until you do this...

[gertsy]

because its poo!

tried holding in the "auto" button for 3 seconds when in the 24Khz+ mode?

I know that going from pal, to ntsc, the gbs simply reports "no signal" until you do this...

So if wasn't poo you'd only hold the button for 1 second?  

[AmmoJammo]

So if wasn't poo you'd only hold the button for 1 second?  

if it wasn't poo, you wouldn't have to ask why it doesn't work