msx-keyboard: corrected implementation of msx-keyboard's integration to the timer tick handler

Source/HBIOS/hbios.asm

@@ -6710,10 +6710,6 @@ HB_TICK1:
 	; PULSE WATCHDOG
 	OUT	(WDOGIO),A		; VALUE IS IRRELEVANT
 #ENDIF
-;
-#IF MKYENABLE
-	CALL	MKY_INT
-#ENDIF
 ;
 	OR	$FF			; NZ SET TO INDICATE INT HANDLED
 	RET

Source/HBIOS/mky.asm

@@ -216,6 +216,14 @@ MKY_INIT:
 	LD	A, 64			; CAPS OFF
 	EZ80_IO
 	OUT	(MKY_REGC), A
+
+	; INSTALL INTERRUPT HANDLER
+	LD	HL, (VEC_TICK+1)
+	LD	(VEC_TICK_MKY+1), HL
+
+	LD	HL, MKY_INT
+	LD	(VEC_TICK+1), HL
+
 	RET
 ;
 ;__________________________________________________________________________________________________
@@ -739,7 +747,7 @@ MKY_INTSCAN1:
 	LD      A, (MKY_SCNCNT)			; SCAN THE KEYBOARD EVERY 'SCAN_INT_PERIOD' INTERRUPTS.
 	DEC     A
 	LD      (MKY_SCNCNT), A
-	RET	NZ
+	JR	NZ, VEC_TICK_MKY
 
 	LD      A, SCAN_INT_PERIOD
 	LD      (MKY_SCNCNT), A
@@ -765,7 +773,9 @@ MKY_SCAN_LP:
 
 	LD	A, $FF				; NOTE THAT A SCAN HAS BEEN DONE
 	LD	(MKY_SCANNED), A
-	RET
+
+VEC_TICK_MKY:
+	JP	HB_TICK
 
 ;
 ;__________________________________________________________________________________________________

Source/HBIOS/std.asm

@@ -680,7 +680,7 @@ SYSTIM	.SET	TM_Z280
   #ENDIF
 ;
   #IF (CPUFAM == CPU_EZ80)
-    #IF (EZ80TIMER == EZ80TMR_INT))
+    #IF (EZ80TIMER == EZ80TMR_INT)
 SYSTIM	.SET	TM_EZ80
 	SYSECHO	" EZ80"
     #ENDIF

Source/HBIOS/tms.asm

@@ -1141,10 +1141,6 @@ TMS_TSTINT:
 
 TMS_INTHNDL:
 
-#IF (TMSKBD == TMSKBD_MKY)
-	CALL	MKY_INT
-#ENDIF
-
 	CALL	HB_TIMINT		; RETURN NZ - HANDLED
 	OR	$FF
 	RET