Programming:Keyboard scanning - Revision history

Urusergi: /* Complete keyboard scanning routine */

2026-01-14T14:59:51Z

‎Complete keyboard scanning routine

2024-06-08T13:09:51Z

‎See

2024-06-08T13:06:06Z

2024-06-08T00:25:12Z

‎Developing programs that use joystick

2024-06-08T00:21:27Z

‎Developing programs that use joystick

2024-06-08T00:20:24Z

‎Developing programs that use joystick

2024-06-08T00:13:03Z

‎Hardware scancodes

2024-06-08T00:10:21Z

‎Developing programs that use joystick

2024-06-08T00:10:00Z

‎Developing programs that use joystick

2024-06-07T23:59:11Z

‎Developing programs that use joystick

@@ Line 171: / Line 171: @@
 keyscan di              ;1 ##%%## C P C   VERSION ##%%##
          ld hl,keymap    ;3
          ld bc,#f782     ;3
          out (c),c       ;4
          ld bc,#f40e     ;3
          out (c),c       ;4
          ld bc,#f6c0     ;3
          out (c),c       ;4
-         xor a           ;1
+         ld d,b          ;1
          out (c),a       ;4
          ld bc,#f792     ;3
          out (c),c       ;4
-        ld a,#40        ;2
+         ld c,d          ;1 (+41)
-         ld c,d          ;1 (+42)
 loop    ld b,d          ;1
          out (c),a       ;4 select line
@@ Line 195: / Line 195: @@
          ld bc,#f782     ;3
          out (c),c       ;4
-         ei              ;1 (+8 = 209 microseconds)
+         ei              ;1 (+8 = 208 microseconds)
          ret
 </pre>

@@ Line 220: / Line 220: @@
 The CPC+ and GX4000 have 2 digital joystick ports built-in (and 1 analog joystick port).
-== See ==
+== See Also ==
 * [[Digital Joysticks]]

@@ Line 220: / Line 220: @@
 The CPC+ and GX4000 have 2 digital joystick ports built-in (and 1 analog joystick port).
-See the relevant cpcwiki page: [[Digital Joysticks]]
+== See ==
 [[Category:Programming]][[Category:CPC Internal Components]]

@@ Line 216: / Line 216: @@
 * '''Q,A,O,P,SPACE''' - (Q up, A down, O left, P right, SPACE fire) This is a good solution, and it's a sort of standard (used by many games). It is best for english QWERTY keyboards, on french AZERTY it'd be A-Q-O-P (but because the decoding of the keys is done in software, normally by the OS, the bits in the keyboard matrix are actually the same).
-The standard CPC has only 1 physical joystick port. But it was possible to daisy chain the official Amstrad joysticks. And a common accessory, the joystick port doubler, offered 2 joystick ports.
+The standard CPC has only 1 digital joystick port (and no analog joystick port). But it was possible to daisy chain the official Amstrad joysticks. And a common accessory, the joystick port doubler, offered 2 digital joystick ports.
-The CPC+ and GX4000 have 2 joystick ports built-in.
+The CPC+ and GX4000 have 2 digital joystick ports built-in (and 1 analog joystick port).
 See the relevant cpcwiki page: [[Digital Joysticks]]
 [[Category:Programming]][[Category:CPC Internal Components]]

@@ Line 204: / Line 204: @@
 In addition, it is also nice if the keys could be redefined but that is not necessary.
-The standard CPC can support 3 joystick buttons, though many CPC joysticks only have 1 button.
+The standard CPC can support 3 buttons per joystick, though many CPC joysticks only have 1 button.
-The CPC+ and GX4000 only support 2 buttons, and the included Amstrad joypads have 2 buttons.
+The CPC+ and GX4000 only support 2 buttons per joystick, and the included Amstrad joypads have 2 buttons.
 There are some common keyboard configurations used:

@@ Line 1: / Line 1: @@
 == Hardware scancodes ==
 === English table ===
@@ Line 101: / Line 100: @@
 |'''&49''' || DEL || Joy1 fire3 || Joy1 fire2 ||Joy1 fire1||Joy1 right||Joy1 left||Joy1 down||Joy1 up
 |}
 == Computing key code ==

@@ Line 215: / Line 215: @@
 * '''Q,A,O,P,SPACE''' - (Q up, A down, O left, P right, SPACE fire) This is a good solution, and it's a sort of standard (used by many games). It is best for english QWERTY keyboards, on french AZERTY it'd be A-Q-O-P (but because the decoding of the keys is done in software, normally by the OS, the bits in the keyboard matrix are actually the same).
-The standard CPC has only 1 physical joystick port. But a common accessory, the joystick port doubler, offered 2 joystick ports. It was also possible to daisy chain the official Amstrad joysticks.
+The standard CPC has only 1 physical joystick port. But it was also possible to daisy chain the official Amstrad joysticks. And a common accessory, the joystick port doubler, offered 2 joystick ports.
 The CPC+ and GX4000 have 2 joystick ports built-in.

← Older revision		Revision as of 23:59, 7 June 2024
Line 214:		Line 214:

	* '''Q,A,O,P,SPACE''' - (Q up, A down, O left, P right, SPACE fire) This is a good solution, and it's a sort of standard (used by many games). It is best for english QWERTY keyboards, on french AZERTY it'd be A-Q-O-P (but because the decoding of the keys is done in software, normally by the OS, the bits in the keyboard matrix are actually the same).		* '''Q,A,O,P,SPACE''' - (Q up, A down, O left, P right, SPACE fire) This is a good solution, and it's a sort of standard (used by many games). It is best for english QWERTY keyboards, on french AZERTY it'd be A-Q-O-P (but because the decoding of the keys is done in software, normally by the OS, the bits in the keyboard matrix are actually the same).
		+
		+	The standard CPC has only 1 physical joystick port. But a common accessory, the joystick port doubler, offered 2 joystick ports. It was also possible to daisy chain the official Amstrad joysticks.
		+
		+	The CPC+ and GX4000 have 2 joystick ports built-in.
		+
		+	See the relevant cpcwiki page: [[Digital Joysticks]]

	[[Category:Programming]][[Category:CPC Internal Components]]		[[Category:Programming]][[Category:CPC Internal Components]]