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add Atari MultiJoy driver from Stefan A. Haubenthal

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git-svn-id: svn://svn.cc65.org/cc65/trunk@3962 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cpg 2009-04-11 18:10:44 +00:00
parent ffa8e7be82
commit 482b3da7d8
3 changed files with 117 additions and 1 deletions
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1
libsrc/Makefile
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@ -80,6 +80,7 @@ atarilib:
done
mv atari/crt0.o atari.o
cp atari/atari-stdjoy.joy ataristd.joy
cp atari/atari-multijoy.joy atarimj8.joy
#-----------------------------------------------------------------------------
# Oric Atmos

2
libsrc/atari/Makefile
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@ -119,7 +119,7 @@ OBJS = _scrsize.o \
EMDS =
JOYS = atari-stdjoy.joy
JOYS = atari-stdjoy.joy atari-multijoy.joy
TGIS =

115
libsrc/atari/atari-multijoy.s Normal file
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@ -0,0 +1,115 @@
;
; MultiJoy joystick driver for the Atari. May be used multiple times when linked
; to the statically application.
;
; Ullrich von Bassewitz, 2002-12-21
; Stefan Haubenthal, 2009-04-10
; Using code from Carsten Strotmann and help from Christian Groessler
;
.include "zeropage.inc"
.include "joy-kernel.inc"
.include "joy-error.inc"
.include "atari.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
.byte $04 ; JOY_DOWN
.byte $08 ; JOY_LEFT
.byte $10 ; JOY_RIGHT
.byte $01 ; JOY_FIRE
.byte $00 ; JOY_FIRE2 not available
.byte $00 ; Future expansion
.byte $00 ; Future expansion
; Jump table.
.addr INSTALL
.addr UNINSTALL
.addr COUNT
.addr READJOY
.addr 0 ; IRQ entry not used
; ------------------------------------------------------------------------
; Constants
JOY_COUNT = 8 ; 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 #$30
sta PACTL
lda #$F0
sta PORTA
lda #$34
sta PACTL
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.
;
READJOY:
asl a
asl a
asl a
asl a
sta PORTA
; Read joystick
lda PORTA ; get position
and #%00001111
asl a
ora TRIG0 ; add button information
eor #%00011111
ldx #0 ; fix X
rts