added i2c controller tests

OperatingSystem/monitor_v2/include/beep.s

@@ -0,0 +1,37 @@
+;------------------------------------------------------------------------------
+; beep
+;
+; Beeps the speaker
+; DE sets duration
+;------------------------------------------------------------------------------
+beep:
+    push    AF
+    push    BC
+    push    DE
+	LD      A,0x08
+    OUT     (CS_PIO_AD), A
+    LD      BC, 0x28
+    CALL    beep_pause
+    LD      A,0x00
+    OUT     (CS_PIO_AD), A
+    LD      BC, 0x24
+    CALL    beep_pause
+    DEC     DE
+    ld      A,D
+    or      E
+    jr      NZ, beep
+    pop     de
+    pop     bc
+    pop     af
+	ret
+
+beep_pause:
+    NEG									; 8 T-states
+	NEG									; 8 T-states
+	NEG									; 8 T-states
+	NEG									; 8 T-states
+	DEC		BC							; 6 T-states
+	LD		A,C							; 9 T-states
+	OR		B							; 4 T-states
+	JP		NZ,beep_pause					; 10 T-states
+	RET									; Pause complete, RETurn