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Gordon228

30.05.2020, 19:27
 

Upscaling freedos (Developers)

I need help as when using FreeDOS on an HD tv that only has HDMI and composite/component outputs any resolution that is not 16x9 or 4x3 will not work and I have not tested a 5x4 but can easily do it by booting up my dos machine and loading quake. So how can i upscale a resolution of lets say 320x200 to 320x240?

DosWorld

30.05.2020, 19:56
(edited by DosWorld, 30.05.2020, 20:28)

@ Gordon228

Upscaling freedos

> So how can i upscale a resolution of lets say
> 320x200 to 320x240?

Definitly, in this case, you need use UPSCALER. :-D

I don't recomend use cheap chineese upscalers (in case hardware like Commodore/Amiga - it will be lost $$$).

May be better use old stuff like "Extron DVS 204 Digital Video Scaler". Check google for Extron's upscalers is it applicable for your case. If i am not wrong - DVS-204 can upscale up to full hd.

Also, some people make and sell modern home-made upscaler's, but price is a little bit big. Used Extron you can pickup on ebay in $20-30, not big difference with china-made stuff.

PS: Also, you don't specify which one video card you use - CGA/EGA/VGA etc. Answer could be different. Here is two problem connect old hardware to modern monitor (grabber etc):
a) resolution
b) some old hardware (CGA, Commodore, Amiga) generate 15 pictures per second. In this case, also need add something like scan line generator or "scandoubler". Something like this one.

If i am not wrong, Extron solve both problem (A+B), chineese upscalers - A only (and not very good).

---
Make DOS great again!

Carthago delenda est, Ceterum censeo Carthaginem delendam esse.

Gordon228

30.05.2020, 20:31
(edited by Gordon228, 30.05.2020, 22:57)

@ DosWorld

Upscaling freedos

This is a Pentium 1 win 98 board with onboard gfx and an sb16 with attached wave blaster yes Isa so os lvl upscale would be nice but also too would HDMI to componet/compost work? Nope that did not work.

DosWorld

31.05.2020, 15:30

@ Gordon228

Upscaling freedos

> This is a Pentium 1 win 98 board with onboard gfx

Looks like VGA/SVGA. You need upscaler only.

---
Make DOS great again!

Carthago delenda est, Ceterum censeo Carthaginem delendam esse.

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