VCB01 Video Controller

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The VCB01 Video Controller is a quad-height, 22 bit QBUS bit-mapped display option module (M7602), providing workstation capability for Q22-bus systems.

The bitmap memory (also called video memory), is 256 kB of MOS RAM, residing in the Q22-bus address space.

In the VAXstation I and VAXstation II, a subset (sometimes called the screen memory) of the bit-mapped video memory is displayed on a 48 cm (19 in) monochrome monitor (the VR100 Monochrome Monitor).

The VCB01 relies on the CPU to generate all images stored in video memory.

The VCB01 also provides several basic I/0 functions, including: