CS/A65 Video board
This page describes schematics to generate
composite video signals from CRTC output signals.
Please note that this only does video signal combination, and
level conversion. It does not do any timing modification.
Thus, to create signals with valid timing, the CRTC must be
programmed appropriately.
2011-06-04
Added a link to Matthew D'Asaro's composite video adapter
2010-12-20
Separated from the CS/A 65 VDC page
Here are links to other composite video adapters
Status: ok
Notes |
To use the vdc board with a standard TV set for
example, a so-called "composite video" signal
must be generated, that includes all three
video, horizontal sync and vertical sync signals.
This board is derived from the "Composite Video Circuit"
from the book "The PET revealed".
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This circuit produces a not so bright picture
on my TV set, and I did not investigate how improve
brightness (might even be my TV).
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| Files
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Status: ok
Notes |
To use the vdc board with a standard TV set for
example, a so-called "composite video" signal
must be generated, that includes all three
video, horizontal sync and vertical sync signals.
This board is derived from the "PET Video Mixer"
by the PET users club of England.
|
|
The original board did not have R2 and R5, and
produces a very bright picture on my TV set.
Therefore I introduced R2 and R5 to adjust brightness
This modification is untested, though.
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| Files
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