Pro-Log 7803 Z-80 Processor Card User Manual

About this manual

The Pro-Log 7803 Z‑80 Processor Card is a buffered, fully expandable Z‑80 microprocessor board with onboard RAM and ROM sockets. It provides a 56‑pin STO BUS interface for modular system expansion and includes features such as a 400 ns crystal‑controlled clock, power‑on reset, and full LSTTL buffering.

The manual details the STO BUS pinout, signal timing, memory and I/O mapping, power requirements, mechanical specifications, and debugging information, along with schematics and assembly diagrams for system integration.

What's inside

• Product Overview
• STO BUS
• Z80 Architecture and Instruction Set
• Specifications
• Memory and I/O Mapping and Control
• Program and Hardware Debugging
• Strapping Options
• Schematic and Assembly Diagrams
• Appendix A
• Appendix B

Specifications

Frequently asked questions

How much RAM is provided on the 7803 processor card?

The card includes 1 KB of RAM and can be expanded to a total of 4 KB.

What clock period does the processor use?

It uses a crystal‑controlled 400 ns clock.

Which bus interface does the 7803 card use?

It connects to the 56‑pin STO BUS.