const mmu_tpr  0x1E38 ; Test Point Register
start:
jp main
jp interrupt
interrupt:
rti
main:
ld A,0x01        ; Load A with bit zero set to one.
ld (mmu_tpr),A   ; Set the test point one bit.
ld A,0x00        ; Load A with all bits zero.
ld (mmu_tpr),A   ; Clear the test point one bit.
jp main