notes are now printed on screen, z now clears the screen, added comments

pcano.asm

@@ -1,15 +1,15 @@
-mov ah, 00h  ; clears the screen and makes the cursor invisible
-mov al, 03h
-int 10h
-mov ah, 01h
-mov cx, 2607h
-int 10h
-mov ah, 02h
-mov dl, 0
-int 10h
+clear:
+	mov ah, 00h  ; clears the screen and sets the cursor to the first position on the screen
+	mov al, 03h
+	int 10h
+	mov ah, 02h
+	mov dl, 0
+	int 10h
 
 input:              ; takes user input
 	in al, 60h
+	cmp al, 44
+	je clear
 	cmp al, 18
 	je lower
 	cmp al, 16
@@ -34,74 +34,93 @@ input:              ; takes user input
 	je setcolon
 	jmp stopnote	
 
-lower:
+
+lower:            ; lower the note later
 	mov cl, 1 
 	jmp input
 
-middle:
+middle:           ; set note to normal pitch
 	mov cl, 0
 	jmp input
 
-upper:
+upper:            ; raise the note later
 	mov cl, 2
 	jmp input
 
 seta:
 	mov bx, 4560 
+	mov al, 'C'
 	jmp playnote
 
 sets: 
 	mov bx, 4063	
+	mov al, 'D'
 	jmp playnote
 
 setd:
 	mov bx, 3619
+	mov al, 'E'
 	jmp playnote
 
 setf:
 	mov bx, 3416
+	mov al, 'F'
 	jmp playnote
 
 setj:
 	mov bx, 3043
+	mov al, 'G'
 	jmp playnote
 
 setk:
 	mov bx, 2711
+	mov al, 'A'
 	jmp playnote
 
 setl:
 	mov bx, 2415
+	mov al, 'B'
 	jmp playnote
 
 setcolon:
 	mov bx, 2280
+	mov al, 'C'
 	jmp playnote
 
-octlow:
+octhigh:         ; raises the note by an octave
 	xor dl, dl
 	mov ax, bx
 	mov bx, 2
 	div bx
 	mov bx, ax
+	mov al, '5'
 	jmp portnote	
 
-octhigh:
+octlow:         ; lowers the note by an octave
 	mov ax, 2
 	mul bx
 	mov bx, ax
+	mov al, '3'
 	jmp portnote
 	
 	
 playnote:
-	mov al, 182 ; playing sounds n stuff
+	mov ah, 0x0e ; prints the char in al
+	int 10h
+
+	mov al, 182 
 	out 43h, al	
-	cmp cl, 2
-	je octhigh
-	cmp cl, 1
+		
+	cmp cl, 2    ; if certain keys were pressed, changes the pitch of the note
 	je octlow
+	cmp cl, 1
+	je octhigh
+	mov al, '4'
 portnote:
-	mov ax, bx
+	mov ah, 0x0e ; prints the octave number
+	int 10h
+
+	mov ax, bx   ; plays the note
 	out 42h, al
 	mov al, ah
 	out 42h, al
@@ -117,7 +136,7 @@ waitforrelease:
 	jne stopnote
 	jmp waitforrelease
 
-stopnote:
+stopnote:            ; turns off the speaker
 	in al, 61h
 	and al, 11111100b
 	out 61h, al