pt3: clean up comments in the interrupt handler

pt3_player/interrupt_handler.s

@@ -155,38 +155,30 @@ update_minutes:
 				; we don't handle > 9:59 songs yet
 done_time:
 								;=============
-								;     90 worst
+								;     89 worst
 
 
 	;=================================
-	; Moved visualization here as a hack
+	; Handle keyboard
 	;=================================
 
-	;============================
-	; Visualization
-	;============================
-
-;	jsr	clear_top
-;	lda	RASTERBARS_ON
-;	beq	skip_rasters
-;	jsr	draw_rasters
-;skip_rasters:
-;	jsr	volume_bars
-;	jsr	page_flip
-
-
 check_keyboard:
 
 	jsr	get_key
 	lda	LASTKEY
 	beq	exit_interrupt
 
+	;====================
+	; space pauses
+
 	cmp	#(' '+$80)
 	bne	key_M
 key_space:
 	lda	#$80
 	eor	DONE_PLAYING
 
+	; disable fire when paused
+
 	sta	DONE_PLAYING
 	beq	yes_bar
 	lda	#0
@@ -200,6 +192,9 @@ lowbar:
 
 	jmp	quiet_exit
 
+	;===========================
+	; M key switches MHz mode
+
 key_M:
 	cmp	#'M'
 	bne	key_left
@@ -209,6 +204,8 @@ key_M:
 	sta	convert_177
 	beq	at_1MHz
 
+	; update text on screen
+
 	lda	#'7'+$80
 	sta	$7F4
 	sta	$BF4
@@ -219,9 +216,11 @@ at_1MHz:
 	sta	$7F4
 	sta	$BF4
 
-
 	jmp	done_key
 
+	;======================
+	; left key, to next song
+
 key_left:
 	cmp	#'A'
 	bne	key_right
@@ -229,6 +228,9 @@ key_left:
 	lda	#$40
 	bne	quiet_exit
 
+	;========================
+	; right key, to prev song
+
 key_right:
 	cmp	#'D'
 	bne	done_key
@@ -239,6 +241,11 @@ key_right:
 done_key:
 	jmp	exit_interrupt
 
+	;========================
+	; stop playing for now
+	; quiet down the Mockingboard
+	; (otherwise will be stuck on last note)
+
 quiet_exit:
 	sta	DONE_PLAYING
 	jsr	clear_ay_both
@@ -261,4 +268,3 @@ exit_interrupt:
 								; ???? cycles
 
 
-