High-Resolution Graphics Unit for Video Genie

This expansion unit for the Video Genie provided a high-resolution monochrome graphics overlay of 384x192 pixels. The high-res layer xor'ed with the text layer and overlapped it exactly - each text character mapped to a 6x12 block of pixels. The software interface was via four I/O ports and was therefore not particularly fast.

Date : Unknown

This exhibit has a reference ID of CH37178. Please quote this reference ID in any communication with the Centre for Computing History.
 

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