CRTC 6545/6845 information
(C) 1999-2006 André Fachat
The pages linked here describe the operation of the CRTC 6545/6845 chips.
News:
- 2007-02-02 Added information on the CRTC status register.
Quickfinder
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General operation
This document describes the general CRTC operation, as well
as the register file.
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CRTC differences
This document describes the differences between a number of
CRTC implementations from Rockwell, MOS, and others.
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CRTC internals
This document describes the internal structure of the
CRTC. I.e. it tries to show the internal CRTC counters,
compares, etc. It explains in greater depth how the CRTC
works.
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Test programs
This page shows a number of test programs and the results
that they produce on a Commodore PET. The test programs
create "raster-effects" by using the CRTC interrupt in the
PET to dynamically change the register values.
Disclaimer
All Copyrights are acknowledged. The information here is provided under the terms of the GNU Public License version 2 unless noted otherwise.
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