UM8321 controller equivalent, crt video attributtes controller.
* On chip attributes logic Reverse video Character blank Character blink Underline Full/half intensity
* Four modes of operation Wide graphics Thin graphics Chara.
The UM8321 Video Attributes Controller (VAC) is an n-channel MaS/LSI device containing graphics logic, attributes logic, data and attributes latches, cursor control and a high speed video shift register. A character generator ROM and a CRT Video attr.
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