Tseng Qtec VGA 1024, Installation Manual

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The HiRes color graphics memory map begins at A000:0000, just like
the IBM VGA/EGA 640x350 mode. As indicated in the table above,
the length of the extended color graphics modes memory map is
longer than the normal mode 10h length.
Extended Color Graphics Memory Map
80x60 Text Mode Memory Map
The 80x60 color text memory map begins at B800:0000 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. As indicated in the table above, the length of
the 80x60 color text memory map is longer than the normal mode 2
length of 4000 bytes.
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