132-Column Color Text Memory Map
The
132-column
color
text memory map begins
at
B800:0000
(monochrome
at B000:0000), just like any other color text.
Memory
is
organized with even bytes as character codes and odd bytes as
attributes,
again
just
like normal color text.
The row offset
register
(CRTC register 13 hex) is normally set to 66 (42 hex) to
compensate
for the greater width of the screen, and so the start
of
each row is 264 bytes after the start of the row above it, as
opposed to the
80-column row offset register of 40 (28 hex) and
160 bytes from the start of one row to the start of the next.
As
indicated in the table above, the lengths of the 132-column
memory maps are
longer than the normal mode 2 length of 4000
bytes.
-57-
Содержание Qtec VGA 1024
Страница 1: ......
Страница 2: ......
Страница 4: ......
Страница 8: ......
Страница 9: ...INSTALLATION ...
Страница 10: ......
Страница 33: ...SOFTWARE UTILITIES ...
Страница 34: ......
Страница 48: ......
Страница 49: ...SOFTWARE DRIVERS ...
Страница 50: ......
Страница 68: ......
Страница 69: ...FOR SOFTWARE DEVELOPERS ...
Страница 70: ......
Страница 104: ......
Страница 105: ...HARDWARE REFERENCE ...
Страница 106: ......
Страница 111: ...SERVICE ...
Страница 112: ......
Страница 118: ......
Страница 119: ......
Страница 120: ......
Страница 121: ......
Страница 122: ......
Страница 123: ......