This is what I have currently in my code for Joystick Sinclair (the numbers are decimal values) probably it is not correct... I thought it was Sinclair 1... I will use your values , thanks very very much!!
ld a,3
ld (50501),a
ld a,11
ld (50502),a
ld a,4
ld (50503),a
ld a,19
ld (50504),a
ld a,35
ld (50505),a