PDA

View Full Version : MDA/CGA/EGA to VGA converter on Wish for $17



zombienerd
June 17th, 2017, 06:23 PM
Has anyone tried this very cheap converter? All the others I can find on the 'net are $100+, usually in the 2-3 hundred range.

https://www.wish.com/c/584f6ef838e0fa3fa9b78941

zombienerd
June 17th, 2017, 06:25 PM
For $22 shipped, I figured it's worth the risk. I've got one on the way. I'll report back when it comes in next month lol.

Towmater
June 17th, 2017, 06:41 PM
It's a fairly standard piece of kit, I've used one on an Amiga, a //GS and others here have reported it working on other machines with only minor gripes like pixel distortion surrounding moving mouse pointers.

evildragon
June 17th, 2017, 06:52 PM
I can't view anything about it without signing into the site.

evildragon
June 17th, 2017, 06:53 PM
Got through it by deleting a bit of their scripts.


Description
Product Features:
1. Supports for 12k to 40k line frequency of the video signal, automatic identification, unlimited field frequency value.
2. Supports for RGB and YPbPr video formats.
3. Supports for interlacing and progressive two scanning methods.
4. Supports for vertical resolution from 200 lines to 600 lines, automatic identification.
5. Supports arbitrary horizontal resolution, automatic identification.
6. Supports for Separate synchronizing signal, composite synchronizing signal or composite synchronizing signal on the video signal, automatic identification.
7. With 800 * 600 output, field frequency of 60Hz standard, VGA signal or a custom resolution.
8. Suitable scope: CNC machine tools, presses, lathes, milling machines, grinding machines, injection molding machines, printing presses, bowling score screen drilling machine, spark machine, SMT placement machine, DSC display, CNC monitors, NUM monitors, computer thickness gauge, Fanuc, Siemens, Mitsubishi, Heidenhain and other old industrial equipment, monitor repair modification upgrade RGB, RGBS, RGBHV, CGA, YPBPR component video image, turn into a 15-pin VGA standard signal output image on an ordinary LCD monitor or ordinary CRT monitor.
The main parameters:
1. Input signal formats supported:
1) Video support: MDA, CGA, EGA, RGB, RGB Sog, RGBS, RGBHV, YPbPr, YUV
2) Supports Interface: 9-pin, 3-pin, 6-pin, 14-pin, 20-pin, 25-pin interface to other irregular
3) Input parameters:
Analog: 0.5-1.0 / TTL: 3-5V
75 Ohm / 750 Ohm
Scan mode: Interlaced / progressive scanning
2. Output signal formats supported:
1) Supportes formats: Standard VGA, resolution of 800 * 600 / 60HZ or custom resolution.
2) Output Interface: D-Sub 15 PIN standard VGA interface
3. Power: DC 12V 1.0A
4. Working Voltage Input: AC 100V-240V; Output: DC 12V1A
5. Material :Aluminum alloy
6. Weight :328g
7.Size L * W * H: 15 * 10 * 2.8 cm / 5.91 * 3.94 * 1.10 in
Accessories:
1 * Power adapter
1 * VGA cable
1 * English User manual
2 * DB9

zombienerd
June 17th, 2017, 06:55 PM
39155


Description
Product Features:
1. Supports for 12k to 40k line frequency of the video signal, automatic identification, unlimited field frequency value.
2. Supports for RGB and YPbPr video formats.
3. Supports for interlacing and progressive two scanning methods.
4. Supports for vertical resolution from 200 lines to 600 lines, automatic identification.
5. Supports arbitrary horizontal resolution, automatic identification.
6. Supports for Separate synchronizing signal, composite synchronizing signal or composite synchronizing signal on the video signal, automatic identification.
7. With 800 * 600 output, field frequency of 60Hz standard, VGA signal or a custom resolution.
8. Suitable scope: CNC machine tools, presses, lathes, milling machines, grinding machines, injection molding machines, printing presses, bowling score screen drilling machine, spark machine, SMT placement machine, DSC display, CNC monitors, NUM monitors, computer thickness gauge, Fanuc, Siemens, Mitsubishi, Heidenhain and other old industrial equipment, monitor repair modification upgrade RGB, RGBS, RGBHV, CGA, YPBPR component video image, turn into a 15-pin VGA standard signal output image on an ordinary LCD monitor or ordinary CRT monitor.
The main parameters:
1. Input signal formats supported:
1) Video support: MDA, CGA, EGA, RGB, RGB Sog, RGBS, RGBHV, YPbPr, YUV
2) Supports Interface: 9-pin, 3-pin, 6-pin, 14-pin, 20-pin, 25-pin interface to other irregular
3) Input parameters:
Analog: 0.5-1.0 / TTL: 3-5V
75 Ohm / 750 Ohm
Scan mode: Interlaced / progressive scanning
2. Output signal formats supported:
1) Supportes formats: Standard VGA, resolution of 800 * 600 / 60HZ or custom resolution.
2) Output Interface: D-Sub 15 PIN standard VGA interface
3. Power: DC 12V 1.0A
4. Working Voltage Input: AC 100V-240V; Output: DC 12V1A
5. Material :Aluminum alloy
6. Weight :328g
7.Size L * W * H: 15 * 10 * 2.8 cm / 5.91 * 3.94 * 1.10 in
Accessories:
1 * Power adapter
1 * VGA cable
1 * English User manual
2 * DB9

EDIT: You beat me to it by a few seconds :)

modem7
June 17th, 2017, 07:01 PM
There have been a few 'CGA to VGA converter' threads.
I think the summary is that the term 'CGA' is a loose one.
Examples at [here (http://www.vcfed.org/forum/showthread.php?49869)] and [here (http://www.vcfed.org/forum/showthread.php?56923)].

zombienerd
June 17th, 2017, 07:14 PM
There have been a few 'CGA to VGA converter' threads.
I think the summary is that the term 'CGA' is a loose one.
Examples at [here (http://www.vcfed.org/forum/showthread.php?49869)] and [here (http://www.vcfed.org/forum/showthread.php?56923)].

That second link appears to be the same card I just ordered. Nice.

njroadfan
June 17th, 2017, 08:13 PM
Its a GBS-82xx converter. Don't be surprised if the output quality is on the lousy side.

evildragon
June 17th, 2017, 08:37 PM
If you use it for games, I hear it has some latency.

zombienerd
June 17th, 2017, 09:06 PM
Its a GBS-82xx converter. Don't be surprised if the output quality is on the lousy side.

Lousy output is better than no output. While I hunt for a few old school monitors, it will do the trick for my upcoming projects.

Stone
June 18th, 2017, 02:12 AM
I have several (12", 13", 14" 16", 17" and 19") CRT monitors if you're ever in my area.

Rauli
June 18th, 2017, 04:53 AM
AFAIK the Gonbes calls CGA to arcade boards video output, not to the PC CGA standard. Many people asks in many sites, they order it because it's cheap, I ask for the results, and they never write again to say it works. What makes me think it doesn't. But indeed I expect someone to say "Yes, it works!"

KenEG
June 18th, 2017, 10:54 AM
I used the C128 DAC with it on my PCjr. It took some adjustments to get the colors right, but it works great.

SpidersWeb
June 19th, 2017, 06:25 PM
hmm GBS-8219 is usually sold in a industrial enclosure for a lot more money.

Still want DACs for accurate colour, but I think this one might be a lot more tolerant of unusual sync frequencies than the standard GBS boards.
I'm currently working on my own solution, but I've ordered one too out of curiosity.

Malvineous
June 30th, 2017, 11:46 PM
It says in the specs previously posted "Input: TTL: 3-5V" which suggest it supports PC CGA/EGA rather than (or as well as) arcade-style CGA.

Looking forward to finding out whether this is the case, as I've wanted one of these types of boards for a while but always been put off by the non-PC input signals.

obaltus
July 1st, 2017, 12:08 AM
Hello,

I just ordered one after reading this thread. Unfortunately, the product description is wrong. And, I receive.d a GBS-8200 instead of the GBS-8219. Fortunately, WISH agreed refunding me. So, don't expect to get the industrial version which cost >150$ and provided in a nice metal enclosure and supports all kind of signals. For 15$, you will get the lousy GBS-8200.

CarlosTex
July 1st, 2017, 03:03 AM
The 8219 Gonbes aparently does support TTL RGB input but i don't think it includes a brownfix. And it usually sells for at least 100$. I think it is better to get a DAC and use with a 15KHz monitor or a 822x

SpidersWeb
July 1st, 2017, 05:01 AM
It says in the specs previously posted "Input: TTL: 3-5V" which suggest it supports PC CGA/EGA rather than (or as well as) arcade-style CGA.

Looking forward to finding out whether this is the case, as I've wanted one of these types of boards for a while but always been put off by the non-PC input signals.

I think you'll find it's analog, but 5V tolerant, just like the GBS-8220. If it had proper digital support it'd have more input lines - CGA is 4 bit, EGA is 6 bit, it only has 3 lines "RGB".

But I'm hoping (fingers crossed) the GBS-8219 addresses two issues I had with the GBS-8220:

a) support for MDA scan rates and
b) separate sync at low resolutions, and not require a sync combiner

zombienerd
July 1st, 2017, 08:14 AM
The board came in yesterday, picture below.

I don't currently have any MDA/CGA/EGA video cards, buying this was to solve the issue before it arose.

I have a CGA-based laptop coming in a few weeks, which I believe has a CGA video out, so when it arrives, I'll see what this thing can do without the DAC.

39434

KenEG
July 1st, 2017, 12:27 PM
The board came in yesterday, picture below.

I don't currently have any MDA/CGA/EGA video cards, buying this was to solve the issue before it arose.

I have a CGA-based laptop coming in a few weeks, which I believe has a CGA video out, so when it arrives, I'll see what this thing can do without the DAC.

39434

That looks exactly like what I have. You need the DAC for intensity and brown correction. If it works at all, you will only get the darker colors.

SpidersWeb
July 17th, 2017, 03:01 PM
Unfortunately Wish advertised GBS-8219, but the photo and what arrived in my mailbox is a GBS-8200, which is great for use with the Commomdore 128 DAC and CGA, but a piece of junk for much else.