User Tools

Site Tools


oric:hardware:generic_joystick_drivers

The Generic Joystick Drivers provide a set of routines for reading each type of joystick interface but outputting the sensed movement in a common format.

The common format comprises of two memory locations called joy_Left and joy_Right (Zero Page or main memory). Each bit of each byte indicates the joystick movement made.

BitValueJoystick Movement
01Left
12Right
24Secondary Fire Button(Telestrat Only)
38Down
416Up
532Primary Fire Button(All Interfaces)

The Code for the drivers also use common labels which should use the #DEFINE construct and be placed at the top of your source code. The labels are as follows. You may freely cut and paste the lines below.

     #define ayc_Register $FF
     #define ayc_Inactive $DD
     #define ayc_Write    $FD
     #define ayc_Read     $DF
     ;
     #define via_portb    $0300
     #define via_porta_hs $0301
     #define via_ddrb     $0302
     #define via_ddra     $0303
     #define via_t1cl     $0304
     #define via_t1ch     $0305
     #define via_t1ll     $0306
     #define via_t1lh     $0307
     #define via_t2cl     $0308
     #define via_t2ll     $0308
     #define via_t2ch     $0309
     #define via_sr       $030A
     #define via_acr      $030B
     #define via_pcr      $030C
     #define via_ifr      $030D
     #define via_ier      $030E
     #define via_porta    $030F
     ;
     #define dkt_LeftJoy  $0310
     #define dkt_RightJoy $0320
     ;
     #define via2_portb    $0320
     #define via2_porta_hs $0321
     #define via2_ddrb     $0322
     #define via2_ddra     $0323
     #define via2_t1cl     $0324
     #define via2_t1ch     $0325
     #define via2_t1ll     $0326
     #define via2_t1lh     $0327
     #define via2_t2cl     $0328
     #define via2_t2ll     $0328
     #define via2_t2ch     $0329
     #define via2_sr       $032A
     #define via2_acr      $032B
     #define via2_pcr      $032C
     #define via2_ifr      $032D
     #define via2_ier      $032E
     #define via2_porta    $032F
oric/hardware/generic_joystick_drivers.txt · Last modified: 2008/03/28 11:57 by twilighte