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New joystick driver contributed by Stefan Haubenthal

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git-svn-id: svn://svn.cc65.org/cc65/trunk@2878 b7a2c559-68d2-44c3-8de9-860c34a00d81
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cuz 2004-02-02 12:23:45 +00:00
parent 7165d4d77f
commit 5ed647b99e
2 changed files with 116 additions and 1 deletions
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2
libsrc/c64/Makefile
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@ -55,7 +55,7 @@ OBJS = _scrsize.o \
EMDS = c64-georam.emd c64-ram.emd c64-ramcart.emd c64-reu.emd c64-vdc.emd
JOYS = c64-hitjoy.joy c64-ptvjoy.joy c64-stdjoy.joy
JOYS = c64-hitjoy.joy c64-numpad.joy c64-ptvjoy.joy c64-stdjoy.joy
SERS = c64-swlink.ser

115
libsrc/c64/c64-numpad.s Normal file
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@ -0,0 +1,115 @@
;
; Joystick driver using C128 number pad in 64 mode.
; May be used multiple times when linked to the statically application.
;
; Stefan Haubenthal, 2004-01-26
; Based on Ullrich von Bassewitz, 2002-12-20
;
.include "zeropage.inc"
.include "joy-kernel.inc"
.include "joy-error.inc"
.include "c64.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 $02 ; JOY_UP "8"
.byte $10 ; JOY_DOWN "2"
.byte $20 ; JOY_LEFT "4"
.byte $08 ; JOY_RIGHT "6"
.byte $04 ; JOY_FIRE "5" ENTER
.byte $00 ; Future expansion
.byte $00 ; Future expansion
.byte $00 ; Future expansion
; Jump table.
.word INSTALL
.word UNINSTALL
.word COUNT
.word READ
; ------------------------------------------------------------------------
; Constants
JOY_COUNT = 1 ; Number of joysticks we support
; ------------------------------------------------------------------------
; Data.
.code
; ------------------------------------------------------------------------
; INSTALL routine. Is called after the driver is loaded into memory. If
; possible, check if the hardware is present and determine the amount of
; memory available.
; Must return an JOY_ERR_xx code in a/x.
;
INSTALL:
lda VIC_CLK_128
cmp #$FF
bne @C128
lda #JOY_ERR_NO_DEVICE
.byte $2C
@C128: lda #JOY_ERR_OK
ldx #0
; rts ; Run into UNINSTALL instead
; ------------------------------------------------------------------------
; UNINSTALL routine. Is called before the driver is removed from memory.
; Can do cleanup or whatever. Must not return anything.
;
UNINSTALL:
rts
; ------------------------------------------------------------------------
; COUNT: Return the total number of available joysticks in a/x.
;
COUNT: lda #JOY_COUNT
ldx #0
rts
; ------------------------------------------------------------------------
; READ: Read a particular joystick passed in A.
;
READ: tax ; Clear high byte
lda #$FD
ldy #$FE
sei
sta VIC_KBD_128
lda CIA1_PRB
and #%00110000
eor #%00110000
lsr
lsr
sty VIC_KBD_128
eor CIA1_PRB
iny
sty VIC_KBD_128 ; Reset to $FF
cli
and #%11111110
eor #%11111110
rts