Driver for the Protovision 4 Player Joystick Adapter by Stefan Haubenthal.

New joy_stddrv module to make the Protovision driver the default driver (cause
it's the only one).


git-svn-id: svn://svn.cc65.org/cc65/trunk@3596 b7a2c559-68d2-44c3-8de9-860c34a00d81

libsrc/pet/.cvsignore

@@ -0,0 +1,3 @@
+*.emd
+*.joy
+*.tgi

libsrc/pet/Makefile

@@ -26,6 +26,15 @@ CFLAGS	= -Osir -g -T -t $(SYS) --forget-inc-paths -I . -I ../../include
 %.o:	%.s
 	@$(AS) -g -o $@ $(AFLAGS) $<
 
+%.emd:	%.o ../runtime/zeropage.o
+	@$(LD) -t module -o $@ $^
+
+%.joy:	%.o ../runtime/zeropage.o
+	@$(LD) -t module -o $@ $^
+
+%.tgi:	%.o ../runtime/zeropage.o
+	@$(LD) -t module -o $@ $^
+
 #--------------------------------------------------------------------------
 # Object files
 
@@ -56,15 +65,29 @@ OBJS =	_scrsize.o	\
 	revers.o        \
         sysuname.o
 
+#--------------------------------------------------------------------------
+# Drivers
+
+EMDS =
+
+JOYS = pet-ptvjoy.joy
+
+TGIS =
+
 #--------------------------------------------------------------------------
 # Targets
 
 .PHONY:	all clean zap
 
-all:	$(OBJS)
+all: 	$(OBJS) $(EMDS) $(JOYS) $(TGIS)
+
+../runtime/zeropage.o:
+	$(MAKE) -C $(dir $@) $(notdir $@)
 
 clean:
-	@$(RM) $(OBJS)
+	@$(RM) $(OBJS) $(EMDS:.emd=.o) $(JOYS:.joy=.o) $(TGIS:.tgi=.o)
 
 zap:	clean
+	@$(RM) $(EMDS) $(JOYS) $(TGIS)
+
 

libsrc/pet/joy_stddrv.s

@@ -0,0 +1,14 @@
+;
+; Name of the standard joystick driver
+;
+; Ullrich von Bassewitz, 2002-12-21
+;
+; const char joy_stddrv[];
+;
+
+	.export	_joy_stddrv
+
+.rodata
+
+_joy_stddrv:	.asciiz	"pet-ptvjoy.joy"
+

libsrc/pet/pet-ptvjoy.s

@@ -0,0 +1,119 @@
+;
+; PTV-2 Player joystick driver for the PET
+;
+; Stefan Haubenthal, 2005-05-25
+; Groepaz/Hitmen, 2002-12-23
+; obviously based on Ullrichs driver :)
+;
+
+	.include "zeropage.inc"
+
+	.include "joy-kernel.inc"
+	.include "joy-error.inc"
+;	.include "pet.inc"
+VIA_PRA		:= $E841		; Port register A
+VIA_DDRA	:= $E843		; Data direction register A
+
+; ------------------------------------------------------------------------
+; 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	$01			; JOY_UP
+	.byte	$02			; JOY_DOWN
+	.byte	$04			; JOY_LEFT
+	.byte	$08			; JOY_RIGHT
+	.byte	$10			; JOY_FIRE
+	.byte	$00			; JOY_FIRE2 unavailable
+	.byte	$00			; Future expansion
+	.byte	$00			; Future expansion
+
+; Jump table.
+
+	.addr	INSTALL
+	.addr	UNINSTALL
+	.addr	COUNT
+	.addr	READ
+	.addr	0			; IRQ entry unused
+
+; ------------------------------------------------------------------------
+; Constants
+
+JOY_COUNT	= 2		; Number of joysticks we support
+
+
+.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:	lda	#%10000000	; via port A Data-Direction
+	sta	VIA_DDRA	; bit 7: out	bit 6-0: in
+
+	tax			; Joystick number into X
+	bne	joy2
+
+; Read joystick 1
+
+joy1:	lda	#$80		; via port A read/write
+	sta	VIA_PRA		; (output one at PA7)
+
+	lda	VIA_PRA		; via port A read/write
+	and	#$1f		; get bit 4-0 (PA4-PA0)
+	rts
+
+; Read joystick 2
+
+joy2:	lda	#$00		; via port A read/write
+	sta	VIA_PRA		; (output zero at PA7)
+
+	lda	VIA_PRA		; via port A read/write
+	and	#$0f		; get bit 3-0 (PA3-PA0)
+	sta	tmp1		; joy 4 directions
+
+	lda	VIA_PRA		; via port A read/write
+	and	#%00100000	; get bit 5 (PA5)
+	lsr
+	ora	tmp1
+
+	ldx	#0
+	rts
+