Added joystick and tgi driver by Karri Kaksonen

git-svn-id: svn://svn.cc65.org/cc65/trunk@3246 b7a2c559-68d2-44c3-8de9-860c34a00d81

libsrc/lynx/lynx-stdjoy.s

@@ -0,0 +1,97 @@
+;
+; Standard joystick driver for the Atari Lynx.
+; The Lynx has two fire buttons. So it is not quite "standard".
+;
+; Modified by Karri Kaksonen, 2004-09-16
+; Ullrich von Bassewitz, 2002-12-20
+; Using code from Steve Schmidtke
+;
+
+	.include 	"zeropage.inc"
+
+      	.include 	"joy-kernel.inc"
+        .include        "joy-error.inc"
+        .include        "lynx.inc"
+
+        .macpack        generic
+
+
+; ------------------------------------------------------------------------
+; Header. Includes jump table
+
+.segment        "JUMPTABLE"
+
+; Driver signature
+
+        .byte   $6A, $6F, $79		; "joy"
+        .byte   JOY_API_VERSION         ; Driver API version number
+
+; Button state masks (8 values)
+
+        .byte   $80                     ; JOY_UP
+        .byte   $40                     ; JOY_DOWN
+        .byte   $20                     ; JOY_LEFT
+        .byte   $10                     ; JOY_RIGHT
+        .byte   $01                     ; JOY_FIRE
+        .byte   $02                     ; JOY_FIRE1
+        .byte   $00                     ;
+        .byte   $00                     ;
+
+; Jump table.
+
+        .word   INSTALL
+        .word   UNINSTALL
+        .word   COUNT
+        .word   READ
+
+; ------------------------------------------------------------------------
+; Constants
+
+JOY_COUNT       = 1             ; Number of joysticks we support
+
+
+; ------------------------------------------------------------------------
+; Data.
+
+
+.code
+
+; ------------------------------------------------------------------------
+; INSTALL routine. Is called after the driver is loaded into memory. If
+; possible, check if the hardware is present and determine the amount of
+; memory available.
+; Must return an JOY_ERR_xx code in a/x.
+;
+
+INSTALL:
+        lda     #<JOY_ERR_OK
+        ldx     #>JOY_ERR_OK
+;	rts                     ; Run into UNINSTALL instead
+
+; ------------------------------------------------------------------------
+; UNINSTALL routine. Is called before the driver is removed from memory.
+; Can do cleanup or whatever. Must not return anything.
+;
+
+UNINSTALL:
+        rts
+
+
+; ------------------------------------------------------------------------
+; COUNT: Return the total number of available joysticks in a/x.
+;
+
+COUNT:
+        lda     #<JOY_COUNT
+        ldx     #>JOY_COUNT
+        rts
+
+; ------------------------------------------------------------------------
+; READ: Read a particular joystick passed in A.
+
+READ:
+       	ldx     #$00            ; Clear high byte
+        lda     JOYSTICK        ; Read joystick
+        rts
+
+