Vector Graphic Z-80 CPU The Vector Graphic Z-80 board is designed around the powerful Z-80
microprocessor chip. The board is fully S-100 bus compatible, providing
interchangeability between systems. All input and output lines are fully
buffered. Loading on the bus is no more than 1 TTL load.
In addition, the board has the necessary circuitry to work well with dynamic memories, such as Vector Graphic's 48K board.
Simplicity of design has been stressed to enhance reliability of operation
by the use of MSI and LSI integrated circuits. This goal has been achieved while not sacrificing any performance factors. 
Z-80 CPU
Z-80 CPU Documentation
Vector Graphic Z-80 CPU User's Manual pdf