SC518 is a Z80 CPU card designed for Z50Bus.

This card provides a Z80 CPU with a choice of clock sources.

The main features are:

• Z80 Central Processor Unit (CPU)
• Jumper to select one of 5 clock sources:
  • Half-size (8-pin DIP) “can” oscillator (x 3)
  • Bus pin USR1
  • External pin
• Typical clock speed 7.3728 MHz
• Compatible with memory card SC519

This card is designed to allow easy selection of a number of different clock sources for the Z80 CPU.

A typical system will also require:

• Backplane (eg. SC501)
• Power supply (eg. SC502)
• Memory card (eg. SC519)
• Serial card (eg. SC521)