Re: Video converter board

[madmax_2069@yahoo-dot-com.no-spam.invalid (madmax2069)]

 > GUEST wrote:
 > I just received a video converter that I ordered from ebay. Rather
 > than post a link, which will expire, here is the description and
 > seller info:
 > 
 > RGBS/CGA/EGA/YUV TO VGA converter 1 output arcade game
 > chowhe_taiwan
 > $32.00 + 5.95 S+H
 > 
 > No documentation comes with the board. You get some cables for the
 > power header and the 8-pin header that you can wire how you want.
The
 > pinouts of these headers are silkscreened on the board.
 > 
 > The reason I took a chance on this board is twofold. It is 1/3 the
 > price of the next cheapest scan doubler I could find, and some
folks
 > on the Amiga forums have used this board with analog RGB outputs.
 > 
 > I didn't have to wire up a cable, as I had a cable with a DB-15 on
one
 > end and a VGA plug on the other. I think it was made for use with a
 > Mac and a VGA monitor. I connected this cable to the VGA-style
input
 > of the board (not for VGA input, although the connector is the
same)
 > and a VGA LCD on the output connector. The board is powered from
5-12
 > VDC. I used a 12 V, 1 A switching adapter that I had on hand.
 > 
 > The first thing you have to do is use the menu buttons to get the
 > onscreen display out of Chinese and into English. You can choose
from
 > four output resolutions: 640x480, 800x600, 1024x768 and 1360x768.
 > Instead of the last one (widescreen), I wish it had gone to the
next
 > standard resolution of 1280x1024, which is the native resolution of
 > the LCD I am using.
 > 
 > Other than menu options for size, position, brightness, etc., you
can
 > select from three different types of input: RGBHV, YPBPR and RGBS.
The
 > last one with composite sync worked with my IIgs.
 > 
 > OK, you're all dying for a picture. Here it is.
 > http://i47.tinypic.com/2u42b88.jpg
 > 
 > Some observations. The picture looks marginally sharper than the
real
 > thing. The background pattern is a little odd. Since we're scaling
 > from 640x200 to 1024x768 with the board, and the native resolution
of
 > the LCD is 1280x1024, the text shows some aliasing and fuzziness.
When
 > you move the mouse cursor, a slight shimmering follows it and is
 > noticeable when you pass over borders and text.
 > 
 > I tried three of the four upscaled resolutions. None looked better
 > than the others to me. I settled on 1024x768. I had to re-size and
re-
 > position the display in each resolution to get things centered on
 > screen. The defaults had the display offscreen on the bottom.
 > 
 > I could wish for a perfect display, but for what I paid for this
 > board, I can live with it. I'll dig up some type of cheap enclosure
to
 > put the board in later.
 > 
 > Now I have to try it with the TTL RGB card that is in my
IIe.

Humm very interesting. Have you tried the 640x480 setting
to see if it helps with the dithering issue i see in the desktop
background.

but the text seems clean and clear. I might try this if it can be used
on my SD TV ( a 21" SONY trinitron that has RGB connections in
the back). that might clean up my 80 colum blurry text when in color
mode.