Advanced, three-bidirectional port interface

This device complements your computer ZX Spectrum of three parallel, bidirectional, 8-bit ports through which you can connect to your computer a vast number of other devices. These include a printer, plotter, light pen, measuring instruments, toys, robots, motors, electric models, programmers, lighting effects, LEDs, etc.

Together with this interface, the joystick controller in the most common Kempston interface can be connected.


Properties:

• 3x 8bit, bidirectional, parallel port
• based on chip Intel 8255A or analog
• for all ZX Spectrum and compatible computers

• 1x Kempston joystick port (switchable) D-SUB 9M
• 1x printer port according to standard Special Didaktik-B D-SUB 25F
• 1x socket bar 2x20pin. for signals of port A, B, C, 4x additional inverter, +5V a GND
• switchable port addresses
• switchable level for printer input /SELECT (log. 0 or log. 1)
• The full-through bus to the connector identical with the ZX Spectrum main bus connector

Advanced parallel interface
Advanced parallel interface
Advanced parallel interface
     Advanced parallel interface ADPI8255A: