Simple joystick-interfaces are a thing of the past. The dual joystick interface "KEMPSTON MAX" offers more:

Main features:
- port A: 5 different joystick modes

Kempston Joystick interface mode
Sinclair Joytick interface mode
Protek Joystick interface mode
QAOP M keys emulation
QAOP SPACE keys emulation

- Port B always works in SINCLAIR1 mode
- Magic button ( reset, joytick mode)
- fully passthrough - you can connect any device that uses ZX Edge connector.
- Joystick mode/activity LEDs
- build upon Atf1502 CPLD and some minor ttls
- transparent case with rubber stands made at my laser machine
- jumperless configurable mode of joystick port A
- 12V/9V/5V status voltages leds

A great new product for the ZX Spectrum, compatible with 16k, 48k, 128k, +2, +2A/B und +3.

Functions:
JOYSTICK PORTS: as mentioned above, joystick port_A may work in 5 modes:

KEMPSTON MODE - MODE 0 - default - no action required
SINCLAIR2 MODE - MODE 1 - to switch joystick port_1 to SINCLAIR2 mode hold joystick in UP position, then press ACTION BUTTON
PROTEK MODE - MODE 2 -to switch joystick port1 to PROTEK/AGF/CURSOR mode, hold joystick in DOWN position, then press ACTION BUTTON
QAOPM MODE - MODE 3 - to switch joystick port1 to this mode, hold joystick in LEFT position, then press ACTION BUTTON
QAOP_SPACE MODE - MODE 4: - to switch joystick port1 to this mode, hold joystick in RIGHT position, then press ACTION BUTTON

ACTION BUTTON pressed with FIRE BUTTON acts as RESET

Dual Joystick-Interface "KEMPSTON_MAX" compatible for ZX Spectrum