Page 4.9
THEORY OF OPERATION
Then the CRT-C selects these same 80 characters again and
again, as the 4-bit scan line counter selects one scan line
after another until all nine scan lines of the first character
row are displayed. Then the 4-bit scan line counter starts over
and the 11-bit character counter selects the next character
row in memory. This continues until all the character rows
have been selected and the screen is fully displayed.
If reverse video has been selected, then the complement of
each bit is sent to the video generation circuits.
Summary of Contents for Z-100 Series
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