.include "io.inc65" .importzp sp, sreg .export _sw_read .export _led_set .autoimport on .code ; @out A: The Value of the switches ; Reads the current values of the switches. _sw_read: lda SW ldx #$0 rts ; @in A: val ; @out A: 0 for success, 1 for failure ; Sets the LEDs _led_set: sta LED rts