ISR CRU MAP ADDRESS PAGE I13 ------------------------------------------------------------- Bit R12-address I/O/I+ Usage ============================================================= 0 >0000 I/O 0: I/O mode 1: timer mode 1 >0002 I+ 0: A peripheral interrupt occured 2 >0004 I+ 0: a VDP interrupt occured 3 >0006 I = . , M N / fire1 fire2 4 >0008 I Space L K J H ; left1 left2 5 >000A I enter O I U Y P right1 right2 6 >000C I (none) 9 8 7 6 0 down1 down2 7 >000E I fctn 2 3 4 5 1 up1 up2 8 >0010 I shift S D F G A 9 >0012 I ctrl W E R T Q 10 >0014 I (none) X C V B Z 11 >0016 - (see bit 27) 12 >0018 I/I+ Pull up 10K to +5V 13 >001A - (see bit 25) 14 >001C - (see bit 24) 15 >001E - (see bit 23) 16 >0020 I/O n.c. 17 >0022 I/O n.c. 18 >0024 O Select keyboard column (or joystick) 19 >0026 O Select keyboard column (or joystick) 20 >0028 O Select keyboard column (or joystick) 21 >002A O Set alpha-lock key 22 >002C O 1: turn CS1 motor on 23 >002E O 1: turn CS2 motor on 24 >0030 O Audio gate 25 >0032 O Output to cassette mike jack 26 >0034 - (see bit 18) 27 >0036 I Input from cassette headphone jack 28 >0038 - (see bit 10: keyboard mirror) 29 >003A - (see bit 9) 30 >003C - (see bit 8) 31 >003E - (see bit 7) =================================================================