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
had:-
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
here.
Other TDL S-100 Boards
SMB
Z16-RAM
ZPU
32KRAM
VDB-2
This page was last modified
on 10/25/2013