• Enable the secondary fire button on the Commodore 64
o For PCB version 1.5b:
▪ PCB 1.5b has a 3-way solder pad above the 9-pin
cable connector. By default, this is bridged
between the centre and lower pads (Atari
mode). By removing the solder bridge and
instead bridging the centre and upper pad, the
second fire button is enabled for C64 and MSX
computers (for supported software).
▪ Next to the solder bridges are three through-
holes. It’s possible to solder pin headers here,
and after removing the solder bridge, use a
jumper instead.
o For PCB version 1.5c:
▪ Remove the circuit board from the ArcadeR to
access the underside.
▪ Swap the jumper J1 from the middle-lower pins
to the middle-upper pins.
o Note: This modification is only necessary to utilise the
secondary fire button. The primary fire button will
still work regardless of the jumper position.
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