TDL VDB-2 Video Board.
This was a late addition to the TDL S-100 board
family. It is now a very rare board.
The board could display 80 characters per line and
25 lines per screen with upper/lower case (with descenders) and 64 graphic
characters. It used independent memory (not part of the processors address
space) and had enough RAM for 2 full screens of display memory. The board
Software controlled character inversion.
Software controlled character blink.
Software controlled display inversion.
Software controlled cursor addressability and cursor position readibility.
There was also an onboard 8-bit parallel port for a keyboard.
The board was actully two boards taking up two S-100 slots altough only one
board interacted with the bus. The board was clearly ahead of its time!
The detailed manual for this board can be obtained
Other TDL S-100 Boards
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