, (, , , ) .
. . .
( n - ) . . . APA (All Points Addressable ). n . , , .
PC, , , , . Windows. .
() , , . , , (Character positions Character boxes ) . 256 ASCII. . .
(dot matrix). . , , (foreground), , (background).
, ROM Video BIOS. (Hardware character generator). 256 . , ( ). .
2 : , ( , , , ). , , , . (video page). , . 4000 , 2000 . 4 = 4096 2 = 2048 , , (96 48) .
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, , . , , , . 16- .
.
- 108h, 109h, 10Ah, 10Bh, 10Ch.