Superboard Colour RGB and composite interface

Steve Gray
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Re: Superboard Colour RGB and composite interface

Post by Steve Gray » Fri Jun 07, 2019 4:45 am

Ok, so the board is almost complete. I decided to go with the RGBI mode only and not emulate OSI mode. I also added a configuration header for selecting sync, a "Gonbes Out" connector, and power output. There's one final double-check to do before sending the boards out.

I have created a project webpage with information and schematics etc here:

http://6502.org/users/sjgray/projects/osi-600d-colour/

Comments and feedback are appreciated. I will update the page when board is sent out and when it arrives.

Steve
C4P working, C1P working. 600D Replica working, C4P+D&N floppy not working. 505 board, 610 board, Mittendorf board, TOSIE hacker board need testing, PicoDOS disk untested.

Steve Gray
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Joined: Mon Oct 06, 2008 1:54 pm
Location: Markham, Ontario, Canada
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Re: Superboard Colour RGB and composite interface

Post by Steve Gray » Tue Jun 11, 2019 8:33 pm

I had to fix the RGB output header.. I had it backwards...

The boards have been sent off to DirtyPCBs.com. I have ordered 12 for the first batch. They will be coming on the slow boat from china so I expect them in about 3-4 weeks.

Steve
C4P working, C1P working. 600D Replica working, C4P+D&N floppy not working. 505 board, 610 board, Mittendorf board, TOSIE hacker board need testing, PicoDOS disk untested.

Steve Gray
Posts: 281
Joined: Mon Oct 06, 2008 1:54 pm
Location: Markham, Ontario, Canada
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Re: Superboard Colour RGB and composite interface

Post by Steve Gray » Wed Jun 12, 2019 6:21 pm

So, here's a picture of the breadboard version with the colour write jumper fix.
FixedColorWriting.jpg
FixedColorWriting.jpg (345.66 KiB) Viewed 672 times
The colour looks much sharper than it appears from my phone's camera.

Boards were in production today.

Steve
C4P working, C1P working. 600D Replica working, C4P+D&N floppy not working. 505 board, 610 board, Mittendorf board, TOSIE hacker board need testing, PicoDOS disk untested.

dave
Site Admin
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Re: Superboard Colour RGB and composite interface

Post by dave » Wed Jun 12, 2019 7:18 pm

Beautiful!

Steve Gray
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Location: Markham, Ontario, Canada
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Re: Superboard Colour RGB and composite interface

Post by Steve Gray » Fri Jun 14, 2019 12:55 am

Been writing some demo software....

Here is a colour chart for 48-column mode:
colour-chart-48-sm.jpg
colour-chart-48-sm.jpg (270.92 KiB) Viewed 654 times
oops, I see a typo..
C4P working, C1P working. 600D Replica working, C4P+D&N floppy not working. 505 board, 610 board, Mittendorf board, TOSIE hacker board need testing, PicoDOS disk untested.

Steve Gray
Posts: 281
Joined: Mon Oct 06, 2008 1:54 pm
Location: Markham, Ontario, Canada
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Re: Superboard Colour RGB and composite interface

Post by Steve Gray » Fri Jun 14, 2019 5:50 pm

Just a note about the above.. my breadboard is connected via an Amiga SCART cable which has its own resistors on the rgb lines, so the colours you see above are not optimized. The optimal values for the final pcb will need to be determined so that the normal and intense colours are more distinct.

Steve
C4P working, C1P working. 600D Replica working, C4P+D&N floppy not working. 505 board, 610 board, Mittendorf board, TOSIE hacker board need testing, PicoDOS disk untested.

Mark
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Re: Superboard Colour RGB and composite interface

Post by Mark » Thu Jun 27, 2019 3:42 am

WinOSI is getting Steve's C1E RGB upgrade as well!
image.gif
image.gif (10.75 KiB) Viewed 484 times

Steve Gray
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Re: Superboard Colour RGB and composite interface

Post by Steve Gray » Thu Jun 27, 2019 4:24 am

Nice! Can't wait. Will we be able to emulate the RGB upgrade BEFORE the boards actually arrive? ;-)

Steve
C4P working, C1P working. 600D Replica working, C4P+D&N floppy not working. 505 board, 610 board, Mittendorf board, TOSIE hacker board need testing, PicoDOS disk untested.

Steve Gray
Posts: 281
Joined: Mon Oct 06, 2008 1:54 pm
Location: Markham, Ontario, Canada
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Re: Superboard Colour RGB and composite interface

Post by Steve Gray » Wed Jul 24, 2019 3:26 am

The Colour boards arrived today. I will be building one or two this week.

Steve
C4P working, C1P working. 600D Replica working, C4P+D&N floppy not working. 505 board, 610 board, Mittendorf board, TOSIE hacker board need testing, PicoDOS disk untested.

Scott Larson
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Joined: Fri Nov 14, 2008 8:32 pm

Re: Superboard Colour RGB and composite interface

Post by Scott Larson » Wed Jul 31, 2019 1:02 am

I always wondered how OSI did NTSC color. It looks like the circuit relies on the slight delay of a 7404 to jab the subcarrier at the right phase to produce a color. That can't possibly work.

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