; Stefan Haubenthal, 2006-08-20
;
- .include "zeropage.inc"
- .include "mouse-kernel.inc"
- .include "c64.inc"
+ .include "zeropage.inc"
+ .include "mouse-kernel.inc"
+ .include "c64.inc"
- .macpack generic
+ .macpack generic
; ------------------------------------------------------------------------
; Header. Includes jump table
-.segment "JUMPTABLE"
+.segment "JUMPTABLE"
HEADER:
; Driver signature
- .byte $6d, $6f, $75 ; "mou"
- .byte MOUSE_API_VERSION ; Mouse driver API version number
+ .byte $6d, $6f, $75 ; "mou"
+ .byte MOUSE_API_VERSION ; Mouse driver API version number
; Jump table.
- .addr INSTALL
- .addr UNINSTALL
- .addr HIDE
- .addr SHOW
- .addr SETBOX
+ .addr INSTALL
+ .addr UNINSTALL
+ .addr HIDE
+ .addr SHOW
+ .addr SETBOX
.addr GETBOX
- .addr MOVE
- .addr BUTTONS
- .addr POS
- .addr INFO
- .addr IOCTL
- .addr IRQ
+ .addr MOVE
+ .addr BUTTONS
+ .addr POS
+ .addr INFO
+ .addr IOCTL
+ .addr IRQ
; Callback table, set by the kernel before INSTALL is called
-CHIDE: jmp $0000 ; Hide the cursor
-CSHOW: jmp $0000 ; Show the cursor
-CMOVEX: jmp $0000 ; Move the cursor to X coord
-CMOVEY: jmp $0000 ; Move the cursor to Y coord
+CHIDE: jmp $0000 ; Hide the cursor
+CSHOW: jmp $0000 ; Show the cursor
+CMOVEX: jmp $0000 ; Move the cursor to X coord
+CMOVEY: jmp $0000 ; Move the cursor to Y coord
;----------------------------------------------------------------------------
; Constants
-SCREEN_HEIGHT = 200
-SCREEN_WIDTH = 320
+SCREEN_HEIGHT = 200
+SCREEN_WIDTH = 320
-.enum JOY
- UP = $01
- DOWN = $02
- LEFT = $04
- RIGHT = $08
- FIRE = $10
+.enum JOY
+ UP = $01
+ DOWN = $02
+ LEFT = $04
+ RIGHT = $08
+ FIRE = $10
.endenum
;----------------------------------------------------------------------------
.bss
Vars:
-YPos: .res 2 ; Current mouse position, Y
-XPos: .res 2 ; Current mouse position, X
-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
-Buttons: .res 1 ; Button mask
+YPos: .res 2 ; Current mouse position, Y
+XPos: .res 2 ; Current mouse position, X
+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
+Buttons: .res 1 ; Button mask
; Temporary value used in the int handler
-Temp: .res 1
+Temp: .res 1
; Default values for above variables
.rodata
-.proc DefVars
- .word SCREEN_HEIGHT/2 ; YPos
- .word SCREEN_WIDTH/2 ; XPos
- .word 0 ; XMin
- .word 0 ; YMin
- .word SCREEN_WIDTH ; XMax
- .word SCREEN_HEIGHT ; YMax
- .byte 0 ; Buttons
+.proc DefVars
+ .word SCREEN_HEIGHT/2 ; YPos
+ .word SCREEN_WIDTH/2 ; XPos
+ .word 0 ; XMin
+ .word 0 ; YMin
+ .word SCREEN_WIDTH ; XMax
+ .word SCREEN_HEIGHT ; YMax
+ .byte 0 ; Buttons
.endproc
.code
; Initialize variables. Just copy the default stuff over
- ldx #.sizeof(DefVars)-1
-@L1: lda DefVars,x
- sta Vars,x
- dex
- bpl @L1
+ ldx #.sizeof(DefVars)-1
+@L1: lda DefVars,x
+ sta Vars,x
+ dex
+ bpl @L1
; Be sure the mouse cursor is invisible and at the default location. We
; need to do that here, because our mouse interrupt handler doesn't set the
; mouse position if it hasn't changed.
- sei
- jsr CHIDE
- lda XPos
- ldx XPos+1
- jsr CMOVEX
- lda YPos
- ldx YPos+1
- jsr CMOVEY
- cli
+ sei
+ jsr CHIDE
+ lda XPos
+ ldx XPos+1
+ jsr CMOVEX
+ lda YPos
+ ldx YPos+1
+ jsr CMOVEY
+ cli
; Done, return zero (= MOUSE_ERR_OK)
- ldx #$00
- txa
- rts
+ ldx #$00
+ txa
+ rts
;----------------------------------------------------------------------------
; UNINSTALL routine. Is called before the driver is removed from memory.
; No return code required (the driver is removed from memory on return).
-UNINSTALL = HIDE ; Hide cursor on exit
+UNINSTALL = HIDE ; Hide cursor on exit
;----------------------------------------------------------------------------
; HIDE routine. Is called to hide the mouse pointer. The mouse kernel manages
; no special action is required besides hiding the mouse cursor.
; No return code required.
-HIDE: sei
- jsr CHIDE
- cli
- rts
+HIDE: sei
+ jsr CHIDE
+ cli
+ rts
;----------------------------------------------------------------------------
; SHOW routine. Is called to show the mouse pointer. The mouse kernel manages
; no special action is required besides enabling the mouse cursor.
; No return code required.
-SHOW: sei
- jsr CSHOW
- cli
- rts
+SHOW: sei
+ jsr CSHOW
+ cli
+ rts
;----------------------------------------------------------------------------
; SETBOX: Set the mouse bounding box. The parameters are passed as they come
bpl @L1
cli
- rts
+ rts
;----------------------------------------------------------------------------
; GETBOX: Return the mouse bounding box. The parameters are passed as they
bpl @L1
cli
- rts
+ rts
;----------------------------------------------------------------------------
; MOVE: Move the mouse to a new position. The position is passed as it comes
; the screen). No return code required.
;
-MOVE: sei ; No interrupts
+MOVE: sei ; No interrupts
- sta YPos
- stx YPos+1 ; New Y position
- jsr CMOVEY ; Set it
+ sta YPos
+ stx YPos+1 ; New Y position
+ jsr CMOVEY ; Set it
- ldy #$01
- lda (sp),y
- sta XPos+1
- tax
- dey
- lda (sp),y
- sta XPos ; New X position
+ ldy #$01
+ lda (sp),y
+ sta XPos+1
+ tax
+ dey
+ lda (sp),y
+ sta XPos ; New X position
- jsr CMOVEX ; Move the cursor
+ jsr CMOVEX ; Move the cursor
- cli ; Allow interrupts
- rts
+ cli ; Allow interrupts
+ rts
;----------------------------------------------------------------------------
; BUTTONS: Return the button mask in a/x.
BUTTONS:
- lda Buttons
- ldx #$00
- rts
+ lda Buttons
+ ldx #$00
+ rts
;----------------------------------------------------------------------------
; POS: Return the mouse position in the MOUSE_POS struct pointed to by ptr1.
; No return code required.
-POS: ldy #MOUSE_POS::XCOORD ; Structure offset
+POS: ldy #MOUSE_POS::XCOORD ; Structure offset
- sei ; Disable interrupts
- lda XPos ; Transfer the position
- sta (ptr1),y
- lda XPos+1
- iny
- sta (ptr1),y
- lda YPos
- iny
- sta (ptr1),y
- lda YPos+1
- cli ; Enable interrupts
+ sei ; Disable interrupts
+ lda XPos ; Transfer the position
+ sta (ptr1),y
+ lda XPos+1
+ iny
+ sta (ptr1),y
+ lda YPos
+ iny
+ sta (ptr1),y
+ lda YPos+1
+ cli ; Enable interrupts
- iny
- sta (ptr1),y ; Store last byte
+ iny
+ sta (ptr1),y ; Store last byte
- rts ; Done
+ rts ; Done
;----------------------------------------------------------------------------
; INFO: Returns mouse position and current button mask in the MOUSE_INFO
; call _mouse_pos to initialize the struct pointer and fill the position
; fields.
-INFO: jsr POS
+INFO: jsr POS
; Fill in the button state
- lda Buttons
- ldy #MOUSE_INFO::BUTTONS
- sta (ptr1),y
+ lda Buttons
+ ldy #MOUSE_INFO::BUTTONS
+ sta (ptr1),y
- rts
+ rts
;----------------------------------------------------------------------------
; IOCTL: Driver defined entry point. The wrapper will pass a pointer to ioctl
; Must return an error code in a/x.
;
-IOCTL: lda #<MOUSE_ERR_INV_IOCTL ; We don't support ioclts for now
- ldx #>MOUSE_ERR_INV_IOCTL
- rts
+IOCTL: lda #<MOUSE_ERR_INV_IOCTL ; We don't support ioclts for now
+ ldx #>MOUSE_ERR_INV_IOCTL
+ rts
;----------------------------------------------------------------------------
; IRQ: Irq handler entry point. Called as a subroutine but in IRQ context
; (so be careful).
;
-IRQ: lda #$7F
- sta CIA1_PRA
- lda CIA1_PRB ; Read port #1
- and #%00001100
- eor #%00001100 ; Make all bits active high
- asl
- sta Buttons
- lsr
- lsr
- lsr
- and #%00000001
- ora Buttons
- sta Buttons
- ldx #%01000000
- stx CIA1_PRA
- ldy #0
-: dey
- bne :-
- ldx SID_ADConv1
- stx XPos
- ldx SID_ADConv2
- stx YPos
-
- lda #$FF
- tax
- bne @AddX ; Branch always
- lda #$01
- ldx #$00
+IRQ: lda #$7F
+ sta CIA1_PRA
+ lda CIA1_PRB ; Read port #1
+ and #%00001100
+ eor #%00001100 ; Make all bits active high
+ asl
+ sta Buttons
+ lsr
+ lsr
+ lsr
+ and #%00000001
+ ora Buttons
+ sta Buttons
+ ldx #%01000000
+ stx CIA1_PRA
+ ldy #0
+: dey
+ bne :-
+ ldx SID_ADConv1
+ stx XPos
+ ldx SID_ADConv2
+ stx YPos
+
+ lda #$FF
+ tax
+ bne @AddX ; Branch always
+ lda #$01
+ ldx #$00
; Calculate the new X coordinate (--> a/y)
-@AddX: add XPos
- tay ; Remember low byte
- txa
- adc XPos+1
- tax
+@AddX: add XPos
+ tay ; Remember low byte
+ txa
+ adc XPos+1
+ tax
; Limit the X coordinate to the bounding box
- cpy XMin
- sbc XMin+1
- bpl @L1
- ldy XMin
- ldx XMin+1
- jmp @L2
-@L1: txa
-
- cpy XMax
- sbc XMax+1
- bmi @L2
- ldy XMax
- ldx XMax+1
-@L2: sty XPos
- stx XPos+1
+ cpy XMin
+ sbc XMin+1
+ bpl @L1
+ ldy XMin
+ ldx XMin+1
+ jmp @L2
+@L1: txa
+
+ cpy XMax
+ sbc XMax+1
+ bmi @L2
+ ldy XMax
+ ldx XMax+1
+@L2: sty XPos
+ stx XPos+1
; Move the mouse pointer to the new X pos
- tya
- jsr CMOVEX
+ tya
+ jsr CMOVEX
- lda #$FF
- tax
- bne @AddY
-@Down: lda #$01
- ldx #$00
+ lda #$FF
+ tax
+ bne @AddY
+@Down: lda #$01
+ ldx #$00
; Calculate the new Y coordinate (--> a/y)
-@AddY: add YPos
- tay ; Remember low byte
- txa
- adc YPos+1
- tax
+@AddY: add YPos
+ tay ; Remember low byte
+ txa
+ adc YPos+1
+ tax
; Limit the Y coordinate to the bounding box
- 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
+ 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 pointer to the new X pos
- tya
- jmp CMOVEY
+ tya
+ jmp CMOVEY
projects / cc65 / blobdiff