Boldfield Joystick interface AC5
The Joystick interface appears in the Boldfield Promotion Brochures 1985 using the reference stock number AC5. The interface is uncased, comprising of a
small PCB with what looks like two chips,
probably a hardware decoding chip and a buffer chip, also some resistors
and a large capacitor. The unit also reproduces the ACE's expansion port to allow other interfaces.
The joystick port its self is a 9 pin male D socket, which most probably used the Atari type joystick.
In 1985 the cost for this interface was £19.55 with free postage. Two game were also included with the interface Frogger and Atic Raid.
Port Used 0001h
Bit 7 = Not used
Bit 6 = Not used
Bit 5 = Fire (0=Released, 1=Pressed)
Bit 4 = Not used
Bit 3 = Left (0=Released, 1=Pressed)
Bit 2 = Right (0=Released, 1=Pressed)
Bit 1 = Down (0=Released, 1=Pressed)
Bit 0 = Up (0=Released, 1=Pressed)
Stusoft information sheet to help user to reconfigure their software for use with the Boldfield Joystick unit.