SC511, v1.0, Description

The SC511, serial and timer card houses a Z80 SIO chip, which provides two TTL serial ports for use with FTDI style serial adapter cables, and a Z80 CTC, which has four counter/timer channels.

The main features of this card are:

  • Z50Bus compatible (“Standard” card size 100mm x 75mm)
  • Full Z80 mode 2 interrupt support (IEI/IEO daisy-chain)
  • Interrupt look-ahead circuit
  • Two TTL serial ports for use with FTDI serial adapter cables
  • Software control of baud rate for both ports
  • On-board oscillator for independence from CPU clock rate
  • Clock tick timer
  • Two I/O address options
  • Optional connection of either port to Z50Bus RX/TX pins

Homebrew 8-bit retro computing