Diag board for WillFA7
For use with my WillFA7 Williams MPU
For the 4x20 LCD display you can use the one from the 'Reichelt shop cart' or any other HD44780 compatible display ( LCD display on Aliexpress )
documentation
The WillFA7 diag board connected to the diag connector on the WillFA7 do provide display output and a subset of the game switches in order to be able to test WillFA7 'on the desk'.
WillFA7 diag controls:
5pin ICSP connector: to be able to program the PIC
contrast poti: for adjusting contrast of the LCD display
option switch: adjust (toggle) the display output: SYS3, SYS7, ..
game controls:
up-down/advance: to navigate in the Williams diagnostic menue
mem. prot: memory protection switch in coin door
Sol. Trig: Trigger for special solenoid #1
slam: slam switch
HS res. : High Score reset
Coins left/center/right: to be able to 'insert' coins
credit: credit button