Dyno•Card

The Dyno•Card Chip Select expansion card is usefully while developing new hardware on a breadboard for the Dyno Computer (D1000). It provides an I/O port-driven chip select (CS, output active-low) circuit that can be set to any 8-bit block of consecutive I/O addresses in the standard Z80 256-bit I/O address range. It also bring out the lower 3-bits of the address bus, the 8-bit data bus, 5-volt power and ground, and the following bus signals: RD (read output, active low), WR (write output, active low), INT1 (open-drain), INT2 (open-drain), WAIT (open-drain) and RESET (open-drain).