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Loadable mouse driver for the C128
git-svn-id: svn://svn.cc65.org/cc65/trunk@2966 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz
parent
663bce6cd7
commit
e4de88958e
@ -163,7 +163,7 @@ c64lib:
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# C128
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c128lib:
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for i in c128 cbm common runtime conio dbg em joystick serial tgi zlib; do \
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for i in c128 cbm common runtime conio dbg em joystick mouse serial tgi zlib; do \
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AS=$(AS) \
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CC=$(CC) \
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LD=$(LD) \
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@ -175,6 +175,7 @@ c128lib:
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mv c128/crt0.o c128.o
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cp c128/*.emd .
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cp c128/*.joy .
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cp c128/*.mou .
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cp c128/*.ser .
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cp c128/c128-640-200-2.tgi c128-vdc.tgi
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cp c128/c128-640-480-2.tgi c128-vdc2.tgi
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@ -20,6 +20,9 @@
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%.joy: %.o ../runtime/zeropage.o
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@$(LD) -t module -o $@ $^
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%.mou: %.o ../runtime/zeropage.o
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@$(LD) -t module -o $@ $^
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%.ser: %.o ../runtime/zeropage.o
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@$(LD) -t module -o $@ $^
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@ -44,7 +47,7 @@ OBJS = _scrsize.o \
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kbhit.o \
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kernal.o \
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mainargs.o \
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mouse.o \
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mcbdefault.o \
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randomize.o \
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revers.o \
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slow.o \
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@ -59,6 +62,8 @@ EMDS = c128-georam.emd c128-ram.emd c128-ramcart.emd c128-reu.emd c128-vdc.emd
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JOYS = c128-ptvjoy.joy c128-stdjoy.joy
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MOUS = c128-1351.mou
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SERS = c128-swlink.ser
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TGIS = c128-640-200-2.tgi c128-640-480-2.tgi
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@ -68,16 +73,16 @@ TGIS = c128-640-200-2.tgi c128-640-480-2.tgi
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.PHONY: all clean zap
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all: $(OBJS) $(EMDS) $(JOYS) $(SERS) $(TGIS)
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all: $(OBJS) $(EMDS) $(JOYS) $(MOUS) $(SERS) $(TGIS)
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../runtime/zeropage.o:
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$(MAKE) -C $(dir $@) $(notdir $@)
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clean:
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@$(RM) $(OBJS) $(EMDS:.emd=.o) $(JOYS:.joy=.o) $(SERS:.ser=.o) $(TGIS:.tgi=.o)
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@$(RM) $(OBJS) $(EMDS:.emd=.o) $(JOYS:.joy=.o) $(MOUS:.mou=.o) $(SERS:.ser=.o) $(TGIS:.tgi=.o)
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zap: clean
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@$(RM) $(EMDS) $(JOYS) $(SERS) $(TGIS)
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@$(RM) $(EMDS) $(JOYS) $(MOUS) $(SERS) $(TGIS)
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402
libsrc/c128/c128-1351.s
Normal file
402
libsrc/c128/c128-1351.s
Normal file
@ -0,0 +1,402 @@
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;
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; Driver for the 1351 proportional mouse. Parts of the code are from
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; the Commodore 1351 mouse users guide.
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;
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; Ullrich von Bassewitz, 2003-12-29
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;
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.include "zeropage.inc"
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.include "mouse-kernel.inc"
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.include "c128.inc"
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.macpack generic
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; ------------------------------------------------------------------------
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; Header. Includes jump table
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.segment "JUMPTABLE"
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HEADER:
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; Driver signature
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.byte $6d, $6f, $75 ; "mou"
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.byte MOUSE_API_VERSION ; Mouse driver API version number
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; Jump table.
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.addr INSTALL
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.addr UNINSTALL
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.addr HIDE
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.addr SHOW
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.addr BOX
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.addr MOVE
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.addr BUTTONS
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.addr POS
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.addr INFO
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.addr IOCTL
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.addr IRQ
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; Callback table, set by the kernel before INSTALL is called
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CHIDE: jmp $0000 ; Hide the cursor
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CSHOW: jmp $0000 ; Show the cursor
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CMOVEX: jmp $0000 ; Move the cursor to X coord
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CMOVEY: jmp $0000 ; Move the cursor to Y coord
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;----------------------------------------------------------------------------
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; Constants
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SCREEN_HEIGHT = 200
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SCREEN_WIDTH = 320
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;----------------------------------------------------------------------------
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; Global variables. The bounding box values are sorted so that they can be
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; written with the least effort in the BOX routine, so don't reorder them.
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.bss
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Vars:
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OldPotX: .res 1 ; Old hw counter values
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OldPotY: .res 1
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YPos: .res 2 ; Current mouse position, Y
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XPos: .res 2 ; Current mouse position, X
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YMax: .res 2 ; Y2 value of bounding box
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XMax: .res 2 ; X2 value of bounding box
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YMin: .res 2 ; Y1 value of bounding box
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XMin: .res 2 ; X1 value of bounding box
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OldValue: .res 1 ; Temp for MoveCheck routine
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NewValue: .res 1 ; Temp for MoveCheck routine
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; Default values for above variables
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.rodata
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.proc DefVars
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.byte 0, 0 ; OldPotX/OldPotY
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.word SCREEN_HEIGHT/2 ; YPos
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.word SCREEN_WIDTH/2 ; XPos
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.word SCREEN_HEIGHT ; YMax
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.word SCREEN_WIDTH ; XMax
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.word 0 ; YMin
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.word 0 ; XMin
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.endproc
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.code
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;----------------------------------------------------------------------------
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; INSTALL routine. Is called after the driver is loaded into memory. If
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; possible, check if the hardware is present.
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; Must return an MOUSE_ERR_xx code in a/x.
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INSTALL:
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; Initialize variables. Just copy the default stuff over
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ldx #.sizeof(DefVars)-1
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@L1: lda DefVars,x
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sta Vars,x
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dex
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bpl @L1
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; Be sure the mouse cursor is invisible and at the default location. We
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; need to do that here, because our mouse interrupt handler doesn't set the
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; mouse position if it hasn't changed.
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sei
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jsr CHIDE
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lda XPos
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ldx XPos+1
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jsr CMOVEX
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lda YPos
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ldx YPos+1
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jsr CMOVEY
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cli
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; Done, return zero (= MOUSE_ERR_OK)
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ldx #$00
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txa
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rts ; Run into UNINSTALL instead
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;----------------------------------------------------------------------------
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; UNINSTALL routine. Is called before the driver is removed from memory.
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; No return code required (the driver is removed from memory on return).
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UNINSTALL = HIDE ; Hide cursor on exit
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;----------------------------------------------------------------------------
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; HIDE routine. Is called to hide the mouse pointer. The mouse kernel manages
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; a counter for calls to show/hide, and the driver entry point is only called
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; if the mouse is currently visible and should get hidden. For most drivers,
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; no special action is required besides hiding the mouse cursor.
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; No return code required.
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HIDE: sei
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jsr CHIDE
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cli
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rts
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;----------------------------------------------------------------------------
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; SHOW routine. Is called to show the mouse pointer. The mouse kernel manages
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; a counter for calls to show/hide, and the driver entry point is only called
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; if the mouse is currently hidden and should become visible. For most drivers,
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; no special action is required besides enabling the mouse cursor.
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; No return code required.
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SHOW: sei
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jsr CSHOW
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cli
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rts
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;----------------------------------------------------------------------------
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; BOX: Set the mouse bounding box. The parameters are passed as they come from
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; the C program, that is, maxy in a/x and the other parameters on the stack.
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; The C wrapper will remove the parameters from the stack when the driver
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; routine returns.
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; No checks are done if the mouse is currently inside the box, this is the job
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; of the caller. It is not necessary to validate the parameters, trust the
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; caller and save some code here. No return code required.
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BOX: ldy #5
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sei
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sta YMax
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stx YMax+1
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@L1: lda (sp),y
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sta XMax,y
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dey
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bpl @L1
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cli
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rts
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;----------------------------------------------------------------------------
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; MOVE: Move the mouse to a new position. The position is passed as it comes
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; from the C program, that is: X on the stack and Y in a/x. The C wrapper will
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; remove the parameter from the stack on return.
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; No checks are done if the new position is valid (within the bounding box or
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; the screen). No return code required.
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;
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MOVE: sei ; No interrupts
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sta YPos
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stx YPos+1 ; New Y position
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jsr CMOVEY ; Set it
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ldy #$01
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lda (sp),y
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sta XPos+1
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tax
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dey
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lda (sp),y
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sta XPos ; New X position
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jsr CMOVEX ; Move the cursor
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cli ; Allow interrupts
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rts
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;----------------------------------------------------------------------------
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; BUTTONS: Return the button mask in a/x.
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BUTTONS:
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lda #$7F
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sei
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sta CIA1_PRA
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lda CIA1_PRB ; Read joystick #0
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cli
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ldx #0
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and #$1F
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eor #$1F
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rts
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;----------------------------------------------------------------------------
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; POS: Return the mouse position in the MOUSE_POS struct pointed to by ptr1.
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; No return code required.
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POS: ldy #MOUSE_POS::XCOORD ; Structure offset
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sei ; Disable interrupts
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lda XPos ; Transfer the position
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sta (ptr1),y
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lda XPos+1
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iny
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sta (ptr1),y
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lda YPos
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iny
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sta (ptr1),y
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lda YPos+1
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cli ; Enable interrupts
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iny
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sta (ptr1),y ; Store last byte
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rts ; Done
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;----------------------------------------------------------------------------
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; INFO: Returns mouse position and current button mask in the MOUSE_INFO
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; struct pointed to by ptr1. No return code required.
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;
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; We're cheating here to keep the code smaller: The first fields of the
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; mouse_info struct are identical to the mouse_pos struct, so we will just
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; call _mouse_pos to initialize the struct pointer and fill the position
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; fields.
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INFO: jsr POS
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; Fill in the button state
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jsr BUTTONS ; Will not touch ptr1
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ldy #MOUSE_INFO::BUTTONS
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sta (ptr1),y
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rts
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;----------------------------------------------------------------------------
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; IOCTL: Driver defined entry point. The wrapper will pass a pointer to ioctl
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; specific data in ptr1, and the ioctl code in A.
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; Must return an error code in a/x.
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;
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IOCTL: lda #<MOUSE_ERR_INV_IOCTL ; We don't support ioclts for now
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ldx #>MOUSE_ERR_INV_IOCTL
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rts
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;----------------------------------------------------------------------------
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; IRQ: Irq handler entry point. Called as a subroutine but in IRQ context
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; (so be careful).
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;
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IRQ: lda SID_ADConv1 ; Get mouse X movement
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ldy OldPotX
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jsr MoveCheck ; Calculate movement vector
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sty OldPotX
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; Skip processing if nothing has changed
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bcc @SkipX
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; Calculate the new X coordinate (--> a/y)
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add XPos
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tay ; Remember low byte
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txa
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adc XPos+1
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tax
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; Limit the X coordinate to the bounding box
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cpy XMin
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sbc XMin+1
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bpl @L1
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ldy XMin
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ldx XMin+1
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jmp @L2
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@L1: txa
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cpy XMax
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sbc XMax+1
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bmi @L2
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ldy XMax
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ldx XMax+1
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@L2: sty XPos
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stx XPos+1
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; Move the mouse pointer to the new X pos
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tya
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jsr CMOVEX
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; Calculate the Y movement vector
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@SkipX: lda SID_ADConv2 ; Get mouse Y movement
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ldy OldPotY
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jsr MoveCheck ; Calculate movement
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sty OldPotY
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; Skip processing if nothing has changed
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bcc @SkipY
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; Calculate the new Y coordinate (--> a/y)
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sta OldValue
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lda YPos
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sub OldValue
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tay
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stx OldValue
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lda YPos+1
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sbc OldValue
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tax
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; Limit the Y coordinate to the bounding box
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cpy YMin
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sbc YMin+1
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bpl @L3
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ldy YMin
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ldx YMin+1
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jmp @L4
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@L3: txa
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cpy YMax
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sbc YMax+1
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bmi @L4
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ldy YMax
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ldx YMax+1
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@L4: sty YPos
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stx YPos+1
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; Move the mouse pointer to the new X pos
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tya
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jmp CMOVEY
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; Done
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@SkipY: rts
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; --------------------------------------------------------------------------
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;
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; Move check routine, called for both coordinates.
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;
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; Entry: y = old value of pot register
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; a = current value of pot register
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; Exit: y = value to use for old value
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; x/a = delta value for position
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;
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MoveCheck:
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sty OldValue
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sta NewValue
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ldx #$00
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sub OldValue ; a = mod64 (new - old)
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and #%01111111
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cmp #%01000000 ; if (a > 0)
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bcs @L1 ;
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lsr a ; a /= 2;
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beq @L2 ; if (a != 0)
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ldy NewValue ; y = NewValue
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sec
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rts ; return
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@L1: ora #%11000000 ; else or in high order bits
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cmp #$FF ; if (a != -1)
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beq @L2
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sec
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ror a ; a /= 2
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dex ; high byte = -1 (X = $FF)
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ldy NewValue
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sec
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rts
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@L2: txa ; A = $00
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clc
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rts
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109
libsrc/c128/mcbdefault.s
Normal file
109
libsrc/c128/mcbdefault.s
Normal file
@ -0,0 +1,109 @@
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;
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; Default mouse callbacks for the C64
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;
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; Ullrich von Bassewitz, 2004-03-20
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;
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; All functions in this module should be interrupt safe, because they may
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; be called from an interrupt handler
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;
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.export _mouse_def_callbacks
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.include "mouse-kernel.inc"
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.include "c128.inc"
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.macpack generic
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; Sprite definitions. The first value can be changed to adjust the number
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; of the sprite used for the mouse.
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MOUSE_SPR = 0 ; Sprite used for the mouse
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MOUSE_SPR_MASK = $01 .shl MOUSE_SPR ; Positive mask
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MOUSE_SPR_NMASK = .lobyte(.not MOUSE_SPR_MASK) ; Negative mask
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VIC_SPR_X = (VIC_SPR0_X + 2*MOUSE_SPR) ; Sprite X register
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VIC_SPR_Y = (VIC_SPR0_Y + 2*MOUSE_SPR) ; Sprite Y register
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.code
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; --------------------------------------------------------------------------
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; Hide the mouse pointer. Always called with interrupts disabled.
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.proc hide
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lda #MOUSE_SPR_NMASK
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and VIC_SPR_ENA
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sta VIC_SPR_ENA
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rts
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.endproc
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; --------------------------------------------------------------------------
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; Show the mouse pointer. Always called with interrupts disabled.
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.proc show
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lda #MOUSE_SPR_MASK
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ora VIC_SPR_ENA
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sta VIC_SPR_ENA
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rts
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.endproc
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; --------------------------------------------------------------------------
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; Move the mouse pointer X position to the value in a/x. Always called with
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; interrupts disabled.
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.proc movex
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; Add the X correction and set the low byte. This frees A.
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add #24 ; X correction
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sta VIC_SPR_X
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; Set the high byte
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txa
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adc #0
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||||
bne @L1 ; Branch if high byte not zero
|
||||
lda VIC_SPR_HI_X ; Get high X bits of all sprites
|
||||
and #MOUSE_SPR_NMASK ; Clear high bit for sprite
|
||||
sta VIC_SPR_HI_X
|
||||
rts
|
||||
|
||||
@L1: lda VIC_SPR_HI_X ; Get high X bits of all sprites
|
||||
ora #MOUSE_SPR_MASK ; Set high bit for sprite
|
||||
sta VIC_SPR_HI_X
|
||||
rts
|
||||
|
||||
.endproc
|
||||
|
||||
; --------------------------------------------------------------------------
|
||||
; Move the mouse pointer Y position to the value in a/x. Always called with
|
||||
; interrupts disabled.
|
||||
|
||||
.proc movey
|
||||
|
||||
clc
|
||||
ldx PALFLAG
|
||||
bne @L1
|
||||
adc #50 ; FIXME: Should be NTSC, is PAL value
|
||||
sta VIC_SPR_Y ; Set Y position
|
||||
rts
|
||||
|
||||
@L1: adc #50 ; Add PAL correction
|
||||
sta VIC_SPR_Y ; Set Y position
|
||||
rts
|
||||
|
||||
.endproc
|
||||
|
||||
; --------------------------------------------------------------------------
|
||||
; Callback structure
|
||||
|
||||
.rodata
|
||||
|
||||
_mouse_def_callbacks:
|
||||
.addr hide
|
||||
.addr show
|
||||
.addr movex
|
||||
.addr movey
|
||||
|
||||
|
||||
@ -1,495 +0,0 @@
|
||||
;
|
||||
; Ullrich von Bassewitz, 24.04.1999
|
||||
;
|
||||
; Routines for the 1351 proportional mouse. Parts of the code are from
|
||||
; the Commodore 1351 mouse users guide.
|
||||
;
|
||||
|
||||
.export _mouse_init, _mouse_done
|
||||
.export _mouse_hide, _mouse_show
|
||||
.export _mouse_box, _mouse_info
|
||||
.export _mouse_move, _mouse_pos
|
||||
.export _mouse_buttons, _mouse_info
|
||||
.condes MouseIRQ, 2
|
||||
|
||||
.import popax, addysp1
|
||||
.importzp ptr1, sp
|
||||
|
||||
.include "c128.inc"
|
||||
|
||||
.macpack generic
|
||||
|
||||
|
||||
.code
|
||||
|
||||
; --------------------------------------------------------------------------
|
||||
;
|
||||
; Constants
|
||||
;
|
||||
|
||||
SPRITE_HEIGHT = 21
|
||||
SPRITE_WIDTH = 24
|
||||
SCREEN_HEIGHT = 200
|
||||
SCREEN_WIDTH = 320
|
||||
XCORR = SPRITE_WIDTH
|
||||
|
||||
; --------------------------------------------------------------------------
|
||||
;
|
||||
; unsigned char __fastcall__ mouse_init (unsigned char type);
|
||||
;
|
||||
|
||||
.proc _mouse_init
|
||||
lda Initialized ; Already initialized?
|
||||
bne AlreadyInitialized ; Jump if yes
|
||||
|
||||
; Initialize variables
|
||||
|
||||
ldx #0
|
||||
lda #XCORR
|
||||
sta XPos
|
||||
stx XPos+1
|
||||
stx YPos
|
||||
stx YPos+1
|
||||
stx OldPotX
|
||||
stx OldPotY
|
||||
stx XMin
|
||||
stx XMin+1 ; XMin = 0
|
||||
lda #50 ; ## FIXME: This is the PAL value
|
||||
sta YCorr
|
||||
sta YPos
|
||||
stx YPos+1
|
||||
sec
|
||||
sbc #SPRITE_HEIGHT ; Sprite height in pixels
|
||||
sta YMin
|
||||
stx YMin+1 ; YMin = 29
|
||||
lda #SCREEN_HEIGHT ; Vertical screen res
|
||||
add YCorr ; Add correction factor
|
||||
sta YMax
|
||||
stx YMax+1
|
||||
inx ; X = 1
|
||||
stx Invisible ; Mouse *not* visible
|
||||
lda #<(SCREEN_WIDTH + SPRITE_WIDTH)
|
||||
sta XMax
|
||||
stx XMax+1 ; XMax = 320 + sprite width
|
||||
|
||||
; Save the old init status and reset bit 0. This will disable the BASIC
|
||||
; IRQ handler which will otherwise try to manage the mouse sprite on its
|
||||
; own
|
||||
|
||||
lda INIT_STATUS
|
||||
sta OldInitStatus
|
||||
and #$FE
|
||||
sta INIT_STATUS
|
||||
|
||||
; Mouse successfully initialized
|
||||
|
||||
lda #1
|
||||
sta Initialized
|
||||
rts
|
||||
|
||||
AlreadyInitialized:
|
||||
lda #0 ; Error
|
||||
rts
|
||||
|
||||
.endproc
|
||||
|
||||
; --------------------------------------------------------------------------
|
||||
;
|
||||
; void mouse_done (void);
|
||||
;
|
||||
|
||||
_mouse_done:
|
||||
lda Initialized ; Initialized?
|
||||
beq mddone ; Jump if no
|
||||
lda #0
|
||||
sta Initialized ; Reset the initialized flag
|
||||
lda OldInitStatus ; Load the old BASIC int bit
|
||||
and #$01 ; Mask it
|
||||
ora INIT_STATUS ; Restore the old state
|
||||
sta INIT_STATUS
|
||||
|
||||
; Disable the mouse sprite
|
||||
|
||||
DisableSprite:
|
||||
lda #$FE ; Clear bit for sprite #0
|
||||
sei ; Disable interrupts
|
||||
and VIC_SPR_ENA
|
||||
sta VIC_SPR_ENA ; Disable sprite
|
||||
cli ; Enable interrupts
|
||||
mddone: rts
|
||||
|
||||
|
||||
; --------------------------------------------------------------------------
|
||||
;
|
||||
; void mouse_hide (void);
|
||||
;
|
||||
|
||||
.proc _mouse_hide
|
||||
|
||||
lda Invisible ; Get the flag
|
||||
bne @L1 ; Jump if already invisible
|
||||
jsr DisableSprite ; Disable the mouse sprite
|
||||
@L1: inc Invisible ; Set the flag to invisible
|
||||
rts
|
||||
|
||||
.endproc
|
||||
|
||||
; --------------------------------------------------------------------------
|
||||
;
|
||||
; void mouse_show (void);
|
||||
;
|
||||
|
||||
.proc _mouse_show
|
||||
|
||||
lda Invisible ; Mouse invisible?
|
||||
beq @L1 ; Jump if no
|
||||
dec Invisible ; Set the flag
|
||||
bne @L1 ; Jump if still invisible
|
||||
|
||||
sei ; Disable interrupts
|
||||
jsr MoveSprite1 ; Move the sprite to it's position
|
||||
lda VIC_SPR_ENA ; Get sprite enable register
|
||||
ora #$01 ; Enable sprite #0
|
||||
sta VIC_SPR_ENA ; Write back
|
||||
cli ; Enable interrupts
|
||||
|
||||
@L1: rts
|
||||
|
||||
.endproc
|
||||
|
||||
; --------------------------------------------------------------------------
|
||||
;
|
||||
; void __fastcall__ mouse_box (int minx, int miny, int maxx, int maxy);
|
||||
;
|
||||
|
||||
.proc _mouse_box
|
||||
|
||||
ldy #0 ; Stack offset
|
||||
|
||||
add YCorr ; Adjust the Y value
|
||||
bcc @L1
|
||||
inx
|
||||
clc
|
||||
@L1: sei ; Disable interrupts
|
||||
|
||||
sta YMax
|
||||
stx YMax+1 ; maxy
|
||||
|
||||
lda (sp),y
|
||||
adc #XCORR
|
||||
sta XMax
|
||||
iny
|
||||
lda (sp),y
|
||||
adc #$00
|
||||
sta XMax+1 ; maxx
|
||||
|
||||
iny
|
||||
lda (sp),y
|
||||
add YCorr
|
||||
sta YMin
|
||||
iny
|
||||
lda (sp),y
|
||||
adc #$00
|
||||
sta YMin+1 ; miny
|
||||
|
||||
iny
|
||||
lda (sp),y
|
||||
add #XCORR
|
||||
sta XMin
|
||||
iny
|
||||
lda (sp),y
|
||||
adc #$00
|
||||
sta XMin+1 ; minx
|
||||
|
||||
cli ; Enable interrupts
|
||||
|
||||
jmp addysp1 ; Drop params, return
|
||||
|
||||
.endproc
|
||||
|
||||
; --------------------------------------------------------------------------
|
||||
;
|
||||
; void __fastcall__ mouse_pos (struct mouse_pos* pos);
|
||||
; /* Return the current mouse position */
|
||||
;
|
||||
|
||||
.proc _mouse_pos
|
||||
|
||||
sta ptr1
|
||||
stx ptr1+1 ; Remember the argument pointer
|
||||
|
||||
ldy #0 ; Structure offset
|
||||
sec ; Needed for the SBC later
|
||||
|
||||
sei ; Disable interrupts
|
||||
lda XPos ; Transfer the position
|
||||
sbc #XCORR
|
||||
sta (ptr1),y
|
||||
lda XPos+1
|
||||
sbc #$00
|
||||
iny
|
||||
sta (ptr1),y
|
||||
lda YPos
|
||||
ldx YPos+1
|
||||
cli ; Restore initial interrupt state
|
||||
|
||||
sub YCorr ; Apply the Y correction value
|
||||
bcs @L1
|
||||
dex
|
||||
@L1: iny
|
||||
sta (ptr1),y ; Store YPos
|
||||
txa
|
||||
iny
|
||||
sta (ptr1),y
|
||||
|
||||
rts ; Done
|
||||
|
||||
.endproc
|
||||
|
||||
; --------------------------------------------------------------------------
|
||||
;
|
||||
; void __fastcall__ mouse_info (struct mouse_info* info);
|
||||
; /* Return the state of the mouse buttons and the position of the mouse */
|
||||
;
|
||||
|
||||
.proc _mouse_info
|
||||
|
||||
; We're cheating here to keep the code smaller: The first fields of the
|
||||
; mouse_info struct are identical to the mouse_pos struct, so we will just
|
||||
; call _mouse_pos to initialize the struct pointer and fill the position
|
||||
; fields.
|
||||
|
||||
jsr _mouse_pos
|
||||
|
||||
; Fill in the button state
|
||||
|
||||
jsr _mouse_buttons ; Will not touch ptr1
|
||||
ldy #4
|
||||
sta (ptr1),y
|
||||
|
||||
rts
|
||||
|
||||
.endproc
|
||||
|
||||
; --------------------------------------------------------------------------
|
||||
;
|
||||
; void __fastcall__ mouse_move (int x, int y);
|
||||
;
|
||||
|
||||
.proc _mouse_move
|
||||
|
||||
add YCorr ; Add Y coordinate correction
|
||||
bcc @L1
|
||||
inx
|
||||
clc
|
||||
@L1: sei
|
||||
sta YPos
|
||||
stx YPos+1
|
||||
cli
|
||||
|
||||
jsr popax ; Get X
|
||||
adc #XCORR ; Adjust X coordinate
|
||||
bcc @L2
|
||||
inx
|
||||
@L2: sei
|
||||
sta XPos
|
||||
stx XPos+1 ; Set new position
|
||||
jsr MoveSprite ; Move the sprite to the mouse pos
|
||||
cli ; Enable interrupts
|
||||
|
||||
rts
|
||||
|
||||
.endproc
|
||||
|
||||
; --------------------------------------------------------------------------
|
||||
;
|
||||
; unsigned char mouse_buttons (void);
|
||||
;
|
||||
|
||||
.proc _mouse_buttons
|
||||
|
||||
lda #$7F
|
||||
sei
|
||||
sta CIA1_PRA
|
||||
lda CIA1_PRB ; Read joystick #0
|
||||
cli
|
||||
ldx #0
|
||||
and #$1F
|
||||
eor #$1F
|
||||
rts
|
||||
|
||||
.endproc
|
||||
|
||||
; --------------------------------------------------------------------------
|
||||
;
|
||||
; Mouse interrupt handler
|
||||
;
|
||||
|
||||
IRQDone:rts
|
||||
|
||||
MouseIRQ:
|
||||
|
||||
lda Initialized ; Mouse initialized?
|
||||
beq IRQDone ; Jump if no
|
||||
lda SID_ADConv1 ; Get mouse X movement
|
||||
ldy OldPotX
|
||||
jsr MoveCheck ; Calculate movement vector
|
||||
sty OldPotX
|
||||
|
||||
; Calculate the new X coordinate (--> a/y)
|
||||
|
||||
add XPos
|
||||
tay ; Remember low byte
|
||||
txa
|
||||
adc XPos+1
|
||||
tax
|
||||
|
||||
; Limit the X coordinate to the bounding box
|
||||
|
||||
cpy XMin
|
||||
sbc XMin+1
|
||||
bpl @L1
|
||||
ldy XMin
|
||||
ldx XMin+1
|
||||
jmp @L2
|
||||
@L1: txa
|
||||
|
||||
cpy XMax
|
||||
sbc XMax+1
|
||||
bmi @L2
|
||||
ldy XMax
|
||||
ldx XMax+1
|
||||
@L2: sty XPos
|
||||
stx XPos+1
|
||||
|
||||
; Calculate the Y movement vector
|
||||
|
||||
lda SID_ADConv2 ; Get mouse Y movement
|
||||
ldy OldPotY
|
||||
jsr MoveCheck ; Calculate movement
|
||||
sty OldPotY
|
||||
|
||||
; Calculate the new Y coordinate (--> a/y)
|
||||
|
||||
sta OldValue
|
||||
lda YPos
|
||||
sub OldValue
|
||||
tay
|
||||
stx OldValue
|
||||
lda YPos+1
|
||||
sbc OldValue
|
||||
tax
|
||||
|
||||
cpy YMin
|
||||
sbc YMin+1
|
||||
bpl @L3
|
||||
ldy YMin
|
||||
ldx YMin+1
|
||||
jmp @L4
|
||||
@L3: txa
|
||||
|
||||
cpy YMax
|
||||
sbc YMax+1
|
||||
bmi @L4
|
||||
ldy YMax
|
||||
ldx YMax+1
|
||||
@L4: sty YPos
|
||||
stx YPos+1
|
||||
|
||||
; Move the mouse sprite to the current mouse position. Must be called
|
||||
; with interrupts off. MoveSprite1 is an entry without checking.
|
||||
|
||||
MoveSprite:
|
||||
|
||||
lda Invisible ; Mouse visible?
|
||||
bne Done ; Jump if no
|
||||
|
||||
; Set the high X bit
|
||||
|
||||
MoveSprite1:
|
||||
lda VIC_SPR_HI_X ; Get high X bits of all sprites
|
||||
and #$FE ; Clear bit for sprite #0
|
||||
ldy XPos+1 ; Test Y position
|
||||
beq @L5
|
||||
ora #$01 ; Set high X bit
|
||||
@L5: sta VIC_SPR_HI_X ; Set hi X sprite values
|
||||
|
||||
; Set the low X byte
|
||||
|
||||
lda XPos
|
||||
sta VIC_SPR0_X ; Set low byte
|
||||
|
||||
; Set the Y position
|
||||
|
||||
ldy YPos+1 ; Negative or too large?
|
||||
bne Done ; Jump if yes
|
||||
lda YPos
|
||||
sta VIC_SPR0_Y ; Set Y position
|
||||
|
||||
; Done
|
||||
|
||||
Done: rts
|
||||
|
||||
; --------------------------------------------------------------------------
|
||||
;
|
||||
; Move check routine, called for both coordinates.
|
||||
;
|
||||
; Entry: y = old value of pot register
|
||||
; a = current value of pot register
|
||||
; Exit: y = value to use for old value
|
||||
; x/a = delta value for position
|
||||
;
|
||||
|
||||
.proc MoveCheck
|
||||
|
||||
sty OldValue
|
||||
sta NewValue
|
||||
ldx #$00
|
||||
|
||||
sub OldValue ; a = mod64 (new - old)
|
||||
and #%01111111
|
||||
cmp #%01000000 ; if (a > 0)
|
||||
bcs @L1 ;
|
||||
lsr a ; a /= 2;
|
||||
beq @L2 ; if (a != 0)
|
||||
ldy NewValue ; y = NewValue
|
||||
rts ; return
|
||||
|
||||
@L1: ora #%11000000 ; else or in high order bits
|
||||
cmp #$FF ; if (a != -1)
|
||||
beq @L2
|
||||
sec
|
||||
ror a ; a /= 2
|
||||
dex ; high byte = -1 (X = $FF)
|
||||
ldy NewValue
|
||||
rts
|
||||
|
||||
@L2: txa ; A = $00
|
||||
rts
|
||||
|
||||
.endproc
|
||||
|
||||
; --------------------------------------------------------------------------
|
||||
; Data
|
||||
|
||||
.bss
|
||||
|
||||
Initialized: .res 1 ; True if mouse initialized
|
||||
OldInitStatus: .res 1 ; Old IRQ flag value
|
||||
OldValue: .res 1 ; Temp for MoveCheck routine
|
||||
NewValue: .res 1 ; Temp for MoveCheck routine
|
||||
YCorr: .res 1 ; Correction for Y coordinate
|
||||
|
||||
Invisible: .res 1 ; Is the mouse invisible?
|
||||
OldPotX: .res 1 ; Old hw counter values
|
||||
OldPotY: .res 1
|
||||
|
||||
XPos: .res 2 ; Current mouse position, X
|
||||
YPos: .res 2 ; Current mouse position, Y
|
||||
|
||||
XMin: .res 2 ; X1 value of bounding box
|
||||
YMin: .res 2 ; Y1 value of bounding box
|
||||
XMax: .res 2 ; X2 value of bounding box
|
||||
YMax: .res 2 ; Y2 value of bounding box
|
||||
|
||||
|
||||
@ -200,6 +200,7 @@ programs for the Commodore C128 using the cc65 crosscompiler.
|
||||
%attr(644,root,root) /usr/lib/cc65/lib/c128.o
|
||||
%attr(644,root,root) /usr/lib/cc65/emd/c128-*.emd
|
||||
%attr(644,root,root) /usr/lib/cc65/joy/c128-*.joy
|
||||
%attr(644,root,root) /usr/lib/cc65/mou/c128-*.mou
|
||||
%attr(644,root,root) /usr/lib/cc65/ser/c128-*.ser
|
||||
%attr(644,root,root) /usr/lib/cc65/tgi/c128-*.tgi
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user