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RGBI

Hi Bill
I have to ask your help for all us 128 users I can not design hardware
 but give me a kit I can built it..
As you know for years using the 80 column has always bin a problem
 and I just loved using that mode..
Now the thing I'm asking can you design a adapter so we can enjoy
 this mode again on a modern monitor..
Thanks in advace

Hi Chris,

Hi Chris,

Sorry for the delay in getting back to you.  There  are adapters out there and I heard Robert Bernardo was working with somone on a new one also.
The trick seems to be that there are some off-the-shelf video convertors that work and saome that dont and the trick is to know which ones, sometimesthe same model may have problems.
I would check emay for an adapter and ask the seller if tested on a C128 (I would be the video circuit got changes as I had to do a durty trick to get it working in the remaining time).  You might try Lemon64 board also which sounds like the biggest.
Let us know how it works out!
BTW you spelled my name wrong though I figured you meant me on teh second reading. :)
Bil

Hi Chris,

Hi Chris,

Sorry for the delay in getting back to you.  There  are adapters out there and I heard Robert Bernardo was working with somone on a new one also.
The trick seems to be that there are some off-the-shelf video convertors that work and saome that dont and the trick is to know which ones, sometimesthe same model may have problems.
I would check emay for an adapter and ask the seller if tested on a C128 (I would be the video circuit got changes as I had to do a durty trick to get it working in the remaining time).  You might try Lemon64 board also which sounds like the biggest.
Let us know how it works out!
BTW you spelled my name wrong though I figured you meant me on teh second reading. :)
Bil

Re: RGBI

Bil Herd wrote:

> There are adapters out there and I heard Robert Bernardo was working with someone on a new one also.

Well, that engineer has not come through with his more sophisticated design. However, a board based on the original Richard42 design is being sold right now by Alex "ajacocks". To read up about it and the details on how to order one, go to

http://www.vintage-computer.com/vcforum/showthread.php?40965-Commodore-1...

Truly,
Robert Bernardo
Fresno Commodore User Group
http://videocam.net.au/fcug

RGBI

There are two simple solutions you can build yourself.  These are RGBI to S-Video and RGBI to VGA.

I don't sell a kit or anything, umm but here is a parts list I have saved...

(For S-Video)

Quantity Description Part#
1 Male DB9 Cable Jameco 66157
6 Diode 1N4148 Jameco 36308
3 Resistor 1/4 Watt 1k Ohm ???
1 POT 1/2 Watt 5k Ohm Jameco 770531
1 Breadboard Jameco 2125042
1 Case Jameco 675462
1 S-Video Adapter Jammaboards CV-04
1 9V 1/2 Amp DC Adapter ???
The case mentioned above requires some work to get the board to fit so you might want to get everything else, and decide on a different case.  I have a bunch of 1/4 watt resistors on hand so I did not have to order any (same goes for 9V adapter) so I don't have a part number.  This works fine for either NTSC or PAL users.
 
(For VGA)
 
Quantity Description Part#
1 Male DB9 Cable Jameco 66157
6 Diode 1N4148 Jameco 36308
3 Resistor 1/4 Watt 1k Ohm ???
1 POT 1/2 Watt 5k Ohm Jameco 770531
1 Breadboard Jameco 2125042
1 Case Jameco 675526
1 VGA Adapter Jammaboards GBS-8220
1 5V 2.6 Amp DC Adapter Jameco 2115506
1 7486 Quad XOR Gate Jameco 295751

Again the case requires some work / is not ideal, so you might want to use something different.  Many of the DC adapters I have laying around are not powerful enough for the GBS-8220 so I actually had to buy one.  This works fine for NTSC but it is reported not to work with PAL... I think the problem is 50 Hz sync failure.  Not sure if it is problem of the GBS-8220 or the VGA monitor.  I have no way to test PAL myself...

 

For both versions, the variable resistor (5k POT) is just for those who like tweaking.  A fixed resistor of 1.2k Ohm should work fine and is cheaper.

Oh, almost forgot.  These simple solutions do not include the "brown fix" which is available (or not?) from others like the adapter mentioned by Robert Bernardo.  For S-Video the dark yellow is close enough to brown for me (see screen shots at links posted above), but a "brown fix" is needed for VGA where it very clearly looks yellow and not at all brown.


I'm kupo for Kupo nuts!

Thanks for that Hydrophilic!

Thanks for that Hydrophilic!  Bil

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