Vector Graphic ZCB Single Board Computer
The Vector Graphic ZCB Single Board Computer provides the capability of a complete computer system on a single board. The ZCB contains what you would normally find on a CPU board, a PROM/RAM board and an I/O board, all contained on one S-100 bus compatible board.
The ZCB contains a Z-80 microprocessor, 1024 bytes of static RAM memory, sockets for up to 12K of PROM, one serial I/O port and three 8-bit parallel ports. Circuitry is provided to support static or dynamic memories. All 8-bit 8080 signals are also generated making the ZCB compatible with 8080 based systems. On-board power regulation and filtering is provided using IC regulators and heat sinks for power dissipation. Input loading on the bus is 1 low power TTL load while output fanout is 10 TTL loads. 
6MHz ZCB While the ZCB does replace 3 boards in a typical system, it is not a complete stand alone microcomputer on one board. A terminal device of some sort is needed as well as additional RAM memory, for most applications. The ZCB could, however, be used as a complete microcomputer in many process control applications. In this case, preprogrammed PROMs (up to l2K bytes worth) could be used on a ZCB board that was equipped with a power supply. Sense data could arrive by an input parallel port, be processed by the CPU section of the board and any data output (control signals, for instance) could be communicated to the equipment via the output parallel port. The data input and a summary of actions taken could be communicated to a central data processing location by the serial port. Thus the ZCB might be used as an intellegent node on a complete process control system, which could decide and provide output immediately and provide information to a higher level data processing system.
4MHz ZCB updated to 6MHZ 
4MHz ZCB updated to 6MHZ - back
4MHz to 6MHz Clock Upgrade Board
IO Cable
ZCB Documentation
Vector Graphic ZCB User's Manual pdf - part 1
Vector Graphic ZCB User's Manual pdf - part 2
Vector Graphic ZCB User's Manual pdf - part 3
Vector Graphic ZCB Misc pdf