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Added Inkwell lightpen drivers for the C64 and the C128.

Browse Source 
They use the mouse driver programming interface.

Added a test program for lightpen drivers.  Now, it knows about only those two drivers; it will need updating when others are added.
This commit is contained in:
Greg King 2013-05-29 19:48:45 -04:00
parent 7572834ebf
commit 051c21726b
7 changed files with 1373 additions and 6 deletions
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7
asminc/c128.inc
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@ -1,5 +1,5 @@
;
; C64 generic definitions. Stolen from Elite128
; C128 generic definitions. Stolen from Elite128
;
@ -32,7 +32,7 @@ FETVEC := $2AA ; Vector patch location for FETCH
STASH := $2AF ; Stash routine in RAM
STAVEC := $2B9 ; Vector patch location for STASH
PALFLAG := $A03 ; $FF=PAL, $00=NTSC
INIT_STATUS := $A04 ; Flag: Reset/NMI Status
INIT_STATUS := $A04 ; Flags: Reset/Restore initiation status
FKEY_LEN := $1000 ; Function key lengths
FKEY_TEXT := $100A ; Function key texts
@ -102,6 +102,9 @@ VIC_CTRL2 := $D016
VIC_HLINE := $D012
VIC_LPEN_X := $D013
VIC_LPEN_Y := $D014
VIC_VIDEO_ADR := $D018
VIC_IRR := $D019 ; Interrupt request register

4
asminc/c64.inc
View File

@ -95,6 +95,9 @@ VIC_CTRL2 := $D016
VIC_HLINE := $D012
VIC_LPEN_X := $D013
VIC_LPEN_Y := $D014
VIC_VIDEO_ADR := $D018
VIC_IRR := $D019 ; Interrupt request register
@ -207,4 +210,3 @@ TP_FAST = $80 ; Switch Rossmoeller TurboProcess to fast mode
RAMONLY = $F8 ; (~(LORAM | HIRAM | IOEN)) & $FF

3
include/c128.h
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@ -6,7 +6,7 @@
/* */
/* */
/* */
/* (C) 1998-2009, Ullrich von Bassewitz */
/* (C) 1998-2013, Ullrich von Bassewitz */
/* Roemerstrasse 52 */
/* D-70794 Filderstadt */
/* EMail: uz@cc65.org */
@ -131,6 +131,7 @@ extern void c128_ptvjoy_joy[];
extern void c128_stdjoy_joy[]; /* Referred to by joy_static_stddrv[] */
extern void c128_1351_mous[]; /* Referred to by mouse_static_stddrv[] */
extern void c128_joy_mou[];
extern void c128_nkwll40_mou[];
extern void c128_pot_mou[];
extern void c128_swlink_ser[];
extern void c128_vdc_tgi[]; /* Referred to by tgi_static_stddrv[] */

5
include/c64.h
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@ -2,11 +2,11 @@
/* */
/* c64.h */
/* */
/* C64 system specific definitions */
/* C64 system-specific definitions */
/* */
/* */
/* */
/* (C) 1998-2010 Ullrich von Bassewitz */
/* (C) 1998-2013 Ullrich von Bassewitz */
/* Roemerstrasse 52 */
/* D-70794 Filderstadt */
/* EMail: uz@cc65.org */
@ -145,6 +145,7 @@ extern void c64_ptvjoy_joy[];
extern void c64_stdjoy_joy[]; /* Referred to by joy_static_stddrv[] */
extern void c64_1351_mou[]; /* Referred to by mouse_static_stddrv[] */
extern void c64_joy_mou[];
extern void c64_inkwell_mou[];
extern void c64_pot_mou[];
extern void c64_swlink_ser[];
extern void c64_hi_tgi[]; /* Referred to by tgi_static_stddrv[] */

552
libsrc/c128/mou/c128-inkwell.s Normal file
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@ -0,0 +1,552 @@
;
; Driver for the Inkwell Systems 170-C and 184-C lightpens.
;
; 2013-05-18, Greg King
;
.include "zeropage.inc"
.include "mouse-kernel.inc"
.include "c128.inc"
.macpack generic
.macpack cbm
; ------------------------------------------------------------------------
; Header. Includes jump table.
.segment "JUMPTABLE"
HEADER:
; Driver signature
.byte $6d, $6f, $75 ; ASCII "mou"
.byte MOUSE_API_VERSION ; Mouse driver API version number
; Jump table
.addr INSTALL
.addr UNINSTALL
.addr HIDE
.addr SHOW
.addr SETBOX
.addr GETBOX
.addr MOVE
.addr BUTTONS
.addr POS
.addr INFO
.addr IOCTL
.addr IRQ
; Mouse driver flags
.byte MOUSE_FLAG_EARLY_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 co-ord.
CMOVEY: jmp $0000 ; Move the cursor to Y co-ord.
;----------------------------------------------------------------------------
; Constants
; This driver is for the 40-column screen.
XSIZE = 40
YSIZE = 25
SCREEN_HEIGHT = YSIZE * 8
SCREEN_WIDTH = XSIZE * 8
SCREEN_ZONE = YSIZE / 4 * XSIZE
SCREEN := $0400
COLOR_RAM := $D800
PRIMM := $FF7D ; Print immediate
;----------------------------------------------------------------------------
; Global variables. The bounding box values are sorted so that they can be
; written with the least effort in the SETBOX and GETBOX routines; so, don't
; re-order them.
.bss
Vars:
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 status bits
XPos: .res 2 ; Current lightpen position, X
YPos: .res 2 ; Current lightpen position, Y
OldPenX: .res 1 ; Old HW-counter values
OldPenY: .res 1
INIT_save: .res 1
.data
; Start with an average offset.
XOffset: .byte 48 / 2 ; Calibration offset, for X position
.rodata
; Default values for above variables
; (We use ".proc" because we want to define both a label and a scope.)
.proc DefVars
.word 0 ; XMin
.word 0 ; YMin
.word SCREEN_WIDTH - 1 ; XMax
.word SCREEN_HEIGHT - 1 ; YMax
.byte %00000000 ; Buttons
.endproc
.proc Command1
scrcode "Adjust by clicking on line."
.endproc
.proc Command2
scrcode "Finish by clicking off box."
.endproc
.code
;----------------------------------------------------------------------------
; INSTALL routine. Is called after the driver is loaded into memory. If
; possible, check if the hardware is present.
; Must return a MOUSE_ERR_xx code in .XA.
INSTALL:
; Disable the BASIC interpreter's interrupt-driven sprite-motion code.
; That allows direct access to the VIC-IIe's sprite registers.
lda INIT_STATUS
sta INIT_save
lda #%11000000
sta INIT_STATUS
bit MODE
bpl @L7 ; Already 40 columns
jsr PRIMM
.byte $1B, 'x' ; Toggle the screen-width mode
.byte $0E, $00 ; Switch to lower-case chars.
; Initiate variables. Just copy the default stuff over.
@L7: sei
ldx #.sizeof (DefVars) - 1
@L0: lda DefVars,x
sta Vars,x
dex
bpl @L0
ldx VIC_LPEN_X
ldy VIC_LPEN_Y
stx OldPenX
sty OldPenY
cli
; There is a delay between when the VIC sends its signal, and when the display
; shows that signal. There is another delay between the display and when
; the lightpen says that it saw that signal. Each display and pen is different.
; Therefore, this driver must be calibrated to them. A white box is painted on
; the screen; and, a line is drawn down the middle of it. When the user clicks
; on that line, the difference between its position and where the VIC thinks
; that the pen is pointing becomes an offset that is subtracted from what the
; VIC sees.
lda VIC_BG_COLOR0
ldx #6 ; Blue screen
stx VIC_BG_COLOR0
pha
jsr CLRSCR
ldy #.sizeof (Command2) - 1
@L2: lda Command2,y
sta SCREEN + SCREEN_ZONE * 2 + XSIZE * 3 + (XSIZE - .sizeof (Command2)) / 2,y
lda #15 ; Light gray text
sta COLOR_RAM + SCREEN_ZONE * 2 + XSIZE * 3 + (XSIZE - .sizeof (Command1)) / 2,y
dey
bpl @L2
ldy #.sizeof (Command1) - 1
@L1: lda Command1,y
sta SCREEN + SCREEN_ZONE * 2 + XSIZE * 1 + (XSIZE - .sizeof (Command1)) / 2,y
lda #15 ; Light gray text
sta COLOR_RAM + SCREEN_ZONE * 2 + XSIZE * 1 + (XSIZE - .sizeof (Command1)) / 2,y
dey
bpl @L1
ldx #SCREEN_ZONE
@L3: lda #$80 | $20 ; Reversed space screen-code
sta SCREEN + SCREEN_ZONE - 1,x
lda #15 ; Light gray box
sta COLOR_RAM + SCREEN_ZONE - 1,x
dex
bnz @L3
ldy #$80 | $5d ; Reversed vertical-bar screen-code
.repeat 4, L
sty SCREEN + SCREEN_ZONE + (L + 1) * XSIZE + XSIZE / 2
.endrep
lda VIC_SPR0_COLOR
ldx #12 ; Medium gray pointer
stx VIC_SPR0_COLOR
pha
jsr SHOW
lda #<(SCREEN_HEIGHT / 4 / 2)
ldx #>(SCREEN_HEIGHT / 4 / 2)
jsr PutCursor
; Wait for the main button to be released.
@L4: lda Buttons
bnz @L4
; Wait for the main button to be pressed.
@L5: lda Buttons
bze @L5
; Find out if the pen is on or off the box.
ldy YPos
ldx YPos+1
txa
cpy #<(YSIZE / 4 * 1 * 8)
sbc #>(YSIZE / 4 * 1 * 8)
bmi @L6 ; Above box
txa
cpy #<(YSIZE / 4 * 2 * 8)
sbc #>(YSIZE / 4 * 2 * 8)
bpl @L6 ; Below box
; The pen is on the box; adjust the offset.
lda OldPenX
sub #(XSIZE * 8 / 2 + 8/2) / 2
sta XOffset
sta OldPenX ; Make IRQ update X co-ordinate
jmp @L4
; Wait for the main button to be released.
@L6: lda Buttons
bnz @L6
lda XOffset ; Tell test program about calibration
sta $3ff
pla
sta VIC_SPR0_COLOR
pla
sta VIC_BG_COLOR0
jsr CLRSCR
; Be sure the lightpen cursor is invisible and at the default location.
; It needs to be done here because the lightpen interrupt handler doesn't
; set the lightpen position if it hasn't changed.
jsr HIDE
lda #<(SCREEN_HEIGHT / 2)
ldx #>(SCREEN_HEIGHT / 2)
PutCursor:
sei
jsr MoveY
lda #<(SCREEN_WIDTH / 2)
ldx #>(SCREEN_WIDTH / 2)
jsr MoveX
cli
; Done, return zero.
lda #MOUSE_ERR_OK
tax
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:
jsr HIDE ; Hide cursor on exit
lda INIT_save
sta INIT_STATUS
rts
;----------------------------------------------------------------------------
; HIDE routine. Is called to hide the lightpen pointer. The mouse kernel manages
; a counter for calls to show/hide, and the driver entry point is called only
; if the mouse is currently visible, and should get hidden. For most drivers,
; no special action is required besides hiding the lightpen cursor.
; No return code required.
HIDE: sei
jsr CHIDE
cli
rts
;----------------------------------------------------------------------------
; SHOW routine. Is called to show the lightpen pointer. The mouse kernel manages
; a counter for calls to show/hide, and the driver entry point is called only
; if the mouse is currently hidden, and should become visible. For most drivers,
; no special action is required besides enabling the lightpen cursor.
; No return code required.
SHOW: sei
jsr CSHOW
cli
rts
;----------------------------------------------------------------------------
; SETBOX: Set the lightpen bounding box. The parameters are passed as they come
; from the C program, that is, a pointer to a mouse_box struct in .XA.
; No checks are done if the lightpen is currently inside the box, that is the job
; of the caller. It is not necessary to validate the parameters; trust the
; caller; and, save some code here. No return code required.
SETBOX: sta ptr1
stx ptr1+1 ; Save data pointer
ldy #.sizeof (MOUSE_BOX) - 1
sei
@L1: lda (ptr1),y
sta XMin,y
dey
bpl @L1
cli
rts
;----------------------------------------------------------------------------
; GETBOX: Return the lightpen bounding box. The parameters are passed as they
; come from the C program, that is, a pointer to a mouse_box struct in .XA.
GETBOX: sta ptr1
stx ptr1+1 ; Save data pointer
ldy #.sizeof (MOUSE_BOX) - 1
@L1: lda XMin,y
sta (ptr1),y
dey
bpl @L1
rts
;----------------------------------------------------------------------------
; MOVE: Move the mouse to a new position. The position is passed as it comes
; from the C program, that is: X on the stack and Y in .XA. The C wrapper will
; remove the parameter from the stack on return.
; No checks are done if the new position is valid (within the bounding box or
; the screen). No return code required.
;
MOVE: sei ; No interrupts
jsr MoveY
ldy #$01
lda (sp),y
tax
dey
lda (sp),y
jsr MoveX ; Move the cursor
cli ; Allow interrupts
rts
;----------------------------------------------------------------------------
; BUTTONS: Return the button mask in .XA.
BUTTONS:
lda Buttons
ldx #>0
; Make the lightpen buttons look like a 1351 mouse.
asl a
asl SID_ADConv2 ; PotY
rol a
eor #MOUSE_BTN_RIGHT
and #MOUSE_BTN_LEFT | MOUSE_BTN_RIGHT
rts
;----------------------------------------------------------------------------
; POS: Return the lightpen position in the MOUSE_POS struct pointed to by ptr1.
; No return code required.
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
iny
sta (ptr1),y ; Store last byte
rts
;----------------------------------------------------------------------------
; INFO: Returns lightpen position and current button mask in the MOUSE_INFO
; struct pointed to by ptr1. No return code required.
;
; 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'll just
; call _mouse_pos to initiate the struct pointer, and fill the position
; fields.
INFO: jsr POS
; Fill in the button state
jsr BUTTONS ; Will not touch ptr1
ldy #MOUSE_INFO::BUTTONS
sta (ptr1),y
rts
;----------------------------------------------------------------------------
; IOCTL: Driver-defined entry point. The wrapper will pass a pointer to ioctl-
; specific data in ptr1, and the ioctl code in .A.
; Must return an error code in .XA.
;
IOCTL: lda #<MOUSE_ERR_INV_IOCTL ; We don't support ioctls, for now
ldx #>MOUSE_ERR_INV_IOCTL
rts
;----------------------------------------------------------------------------
; IRQ: IRQ handler entry point. Called as a subroutine, but in the IRQ context
; (so, be careful). The routine MUST return carry set if the interrupt has been
; 'handled' -- which means that the interrupt source is gone. Otherwise, it
; MUST return carry clear.
;
IRQ:
; Record the state of the buttons.
; Try to avoid crosstalk between the keyboard and the lightpen.
ldy #%00000000 ; Set ports A and B to input
sty CIA1_DDRB
sty CIA1_DDRA ; Keyboard won't look like buttons
lda CIA1_PRB ; Read Control-Port 1
dec CIA1_DDRA ; Set port A back to output
eor #%11111111 ; Bit goes up when button goes down
sta Buttons
bze @L0
lda #%11101111 ; (Don't change bit that feeds VIC-II)
sta CIA1_DDRB ; Buttons won't look like keyboard
sty CIA1_PRB ; Set "all keys pushed"
; Read the VIC-II lightpen registers.
@L0: lda VIC_LPEN_Y
cmp OldPenY
; Skip processing if nothing has changed.
beq @SkipY
sta OldPenY
; Subtract the height of the top border, so that the lightpen co-ordinate
; will match the TGI co-ordinate.
sub #50
tay ; Remember low byte
ldx #>0
; Limit the Y co-ordinate to the bounding box.
txa
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: tya
jsr MoveY
@SkipY: lda VIC_LPEN_X
cmp OldPenX
; Skip processing if nothing has changed.
beq @SkipX
sta OldPenX
; Adjust the co-ordinate by the calibration offset.
sub XOffset
; Calculate the new X co-ordinate (--> .AY --> .XY).
; The VIC-II register is eight bits; but, the screen co-ordinate is nine bits.
; Therefore, the VIC-II number is doubled. Then, it points to every other pixel;
; but, it can reach across the screen.
asl a
tay ; Remember low byte
lda #>0
rol a
tax
; Limit the X co-ordinate 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: tya
jsr MoveX
; Done
@SkipX: clc ; Interrupt not "handled"
rts
; Move the lightpen pointer to the new Y pos.
MoveY: sta YPos
stx YPos+1
jmp CMOVEY
; Move the lightpen pointer to the new X pos.
MoveX: sta XPos
stx XPos+1
jmp CMOVEX

526
libsrc/c64/mou/c64-inkwell.s Normal file
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@ -0,0 +1,526 @@
;
; Driver for the Inkwell Systems 170-C and 184-C lightpens.
;
; 2013-05-16, Greg King
;
.include "zeropage.inc"
.include "mouse-kernel.inc"
.include "c64.inc"
.macpack generic
.macpack cbm
; ------------------------------------------------------------------------
; Header. Includes jump table.
.segment "JUMPTABLE"
HEADER:
; Driver signature
.byte $6d, $6f, $75 ; ASCII "mou"
.byte MOUSE_API_VERSION ; Mouse driver API version number
; Jump table
.addr INSTALL
.addr UNINSTALL
.addr HIDE
.addr SHOW
.addr SETBOX
.addr GETBOX
.addr MOVE
.addr BUTTONS
.addr POS
.addr INFO
.addr IOCTL
.addr IRQ
; Mouse driver flags
.byte MOUSE_FLAG_EARLY_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 co-ord.
CMOVEY: jmp $0000 ; Move the cursor to Y co-ord.
;----------------------------------------------------------------------------
; Constants
SCREEN_HEIGHT = YSIZE * 8
SCREEN_WIDTH = XSIZE * 8
SCREEN_ZONE = YSIZE / 4 * XSIZE
; This driver is for the standard 40-column screen.
SCREEN := $0400
COLOR_RAM := $D800
;----------------------------------------------------------------------------
; Global variables. The bounding box values are sorted so that they can be
; written with the least effort in the SETBOX and GETBOX routines; so, don't
; re-order them.
.bss
Vars:
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 status bits
XPos: .res 2 ; Current lightpen position, X
YPos: .res 2 ; Current lightpen position, Y
OldPenX: .res 1 ; Old HW-counter values
OldPenY: .res 1
.data
; Start with an average offset.
XOffset: .byte 48 / 2 ; Calibration offset, for X position
.rodata
; Default values for above variables
; (We use ".proc" because we want to define both a label and a scope.)
.proc DefVars
.word 0 ; XMin
.word 0 ; YMin
.word SCREEN_WIDTH - 1 ; XMax
.word SCREEN_HEIGHT - 1 ; YMax
.byte %00000000 ; Buttons
.endproc
.proc Command1
scrcode "Adjust by clicking on line."
.endproc
.proc Command2
scrcode "Finish by clicking off box."
.endproc
.code
;----------------------------------------------------------------------------
; INSTALL routine. Is called after the driver is loaded into memory. If
; possible, check if the hardware is present.
; Must return a MOUSE_ERR_xx code in .XA.
INSTALL:
; Initiate variables. Just copy the default stuff over.
sei
ldx #.sizeof (DefVars) - 1
@L0: lda DefVars,x
sta Vars,x
dex
bpl @L0
ldx VIC_LPEN_X
ldy VIC_LPEN_Y
stx OldPenX
sty OldPenY
cli
; There is a delay between when the VIC sends its signal, and when the display
; shows that signal. There is another delay between the display and when
; the lightpen says that it saw that signal. Each display and pen is different.
; Therefore, this driver must be calibrated to them. A white box is painted on
; the screen; and, a line is drawn down the middle of it. When the user clicks
; on that line, the difference between its position and where the VIC thinks
; that the pen is pointing becomes an offset that is subtracted from what the
; VIC sees.
lda VIC_BG_COLOR0
ldx #6 ; Blue screen
stx VIC_BG_COLOR0
pha
jsr CLRSCR
ldy #.sizeof (Command2) - 1
@L2: lda Command2,y
sta SCREEN + SCREEN_ZONE * 2 + XSIZE * 3 + (XSIZE - .sizeof (Command2)) / 2,y
lda #15 ; Light gray text
sta COLOR_RAM + SCREEN_ZONE * 2 + XSIZE * 3 + (XSIZE - .sizeof (Command1)) / 2,y
dey
bpl @L2
ldy #.sizeof (Command1) - 1
@L1: lda Command1,y
sta SCREEN + SCREEN_ZONE * 2 + XSIZE * 1 + (XSIZE - .sizeof (Command1)) / 2,y
lda #15 ; Light gray text
sta COLOR_RAM + SCREEN_ZONE * 2 + XSIZE * 1 + (XSIZE - .sizeof (Command1)) / 2,y
dey
bpl @L1
ldx #SCREEN_ZONE
@L3: lda #$80 | $20 ; Reversed space screen-code
sta SCREEN + SCREEN_ZONE - 1,x
lda #15 ; Light gray box
sta COLOR_RAM + SCREEN_ZONE - 1,x
dex
bnz @L3
ldy #$80 | $5d ; Reversed vertical-bar screen-code
.repeat 4, L
sty SCREEN + SCREEN_ZONE + (L + 1) * XSIZE + XSIZE / 2
.endrep
lda VIC_SPR0_COLOR
ldx #12 ; Medium gray pointer
stx VIC_SPR0_COLOR
pha
jsr SHOW
lda #<(SCREEN_HEIGHT / 4 / 2)
ldx #>(SCREEN_HEIGHT / 4 / 2)
jsr PutCursor
; Wait for the main button to be released.
@L4: lda Buttons
bnz @L4
; Wait for the main button to be pressed.
@L5: lda Buttons
bze @L5
; Find out if the pen is on or off the box.
ldy YPos
ldx YPos+1
txa
cpy #<(YSIZE / 4 * 1 * 8)
sbc #>(YSIZE / 4 * 1 * 8)
bmi @L6 ; Above box
txa
cpy #<(YSIZE / 4 * 2 * 8)
sbc #>(YSIZE / 4 * 2 * 8)
bpl @L6 ; Below box
; The pen is on the box; adjust the offset.
lda OldPenX
sub #(XSIZE * 8 / 2 + 8/2) / 2
sta XOffset
sta OldPenX ; Make IRQ update X co-ordinate
jmp @L4
; Wait for the main button to be released.
@L6: lda Buttons
bnz @L6
lda XOffset ; Tell test program about calibration
sta $3ff
pla
sta VIC_SPR0_COLOR
pla
sta VIC_BG_COLOR0
jsr CLRSCR
; Be sure the lightpen cursor is invisible and at the default location.
; It needs to be done here because the lightpen interrupt handler doesn't
; set the lightpen position if it hasn't changed.
jsr HIDE
lda #<(SCREEN_HEIGHT / 2)
ldx #>(SCREEN_HEIGHT / 2)
PutCursor:
sei
jsr MoveY
lda #<(SCREEN_WIDTH / 2)
ldx #>(SCREEN_WIDTH / 2)
jsr MoveX
cli
; Done, return zero.
lda #MOUSE_ERR_OK
tax
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
;----------------------------------------------------------------------------
; HIDE routine. Is called to hide the lightpen pointer. The mouse kernel manages
; a counter for calls to show/hide, and the driver entry point is called only
; if the mouse is currently visible, and should get hidden. For most drivers,
; no special action is required besides hiding the lightpen cursor.
; No return code required.
HIDE: sei
jsr CHIDE
cli
rts
;----------------------------------------------------------------------------
; SHOW routine. Is called to show the lightpen pointer. The mouse kernel manages
; a counter for calls to show/hide, and the driver entry point is called only
; if the mouse is currently hidden, and should become visible. For most drivers,
; no special action is required besides enabling the lightpen cursor.
; No return code required.
SHOW: sei
jsr CSHOW
cli
rts
;----------------------------------------------------------------------------
; SETBOX: Set the lightpen bounding box. The parameters are passed as they come
; from the C program, that is, a pointer to a mouse_box struct in .XA.
; No checks are done if the lightpen is currently inside the box, that is the job
; of the caller. It is not necessary to validate the parameters; trust the
; caller; and, save some code here. No return code required.
SETBOX: sta ptr1
stx ptr1+1 ; Save data pointer
ldy #.sizeof (MOUSE_BOX) - 1
sei
@L1: lda (ptr1),y
sta XMin,y
dey
bpl @L1
cli
rts
;----------------------------------------------------------------------------
; GETBOX: Return the lightpen bounding box. The parameters are passed as they
; come from the C program, that is, a pointer to a mouse_box struct in .XA.
GETBOX: sta ptr1
stx ptr1+1 ; Save data pointer
ldy #.sizeof (MOUSE_BOX) - 1
@L1: lda XMin,y
sta (ptr1),y
dey
bpl @L1
rts
;----------------------------------------------------------------------------
; MOVE: Move the mouse to a new position. The position is passed as it comes
; from the C program, that is: X on the stack and Y in .XA. The C wrapper will
; remove the parameter from the stack on return.
; No checks are done if the new position is valid (within the bounding box or
; the screen). No return code required.
;
MOVE: sei ; No interrupts
jsr MoveY
ldy #$01
lda (sp),y
tax
dey
lda (sp),y
jsr MoveX ; Move the cursor
cli ; Allow interrupts
rts
;----------------------------------------------------------------------------
; BUTTONS: Return the button mask in .XA.
BUTTONS:
lda Buttons
ldx #>0
; Make the lightpen buttons look like a 1351 mouse.
asl a
asl SID_ADConv2 ; PotY
rol a
eor #MOUSE_BTN_RIGHT
and #MOUSE_BTN_LEFT | MOUSE_BTN_RIGHT
rts
;----------------------------------------------------------------------------
; POS: Return the lightpen position in the MOUSE_POS struct pointed to by ptr1.
; No return code required.
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
iny
sta (ptr1),y ; Store last byte
rts
;----------------------------------------------------------------------------
; INFO: Returns lightpen position and current button mask in the MOUSE_INFO
; struct pointed to by ptr1. No return code required.
;
; 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'll just
; call _mouse_pos to initiate the struct pointer, and fill the position
; fields.
INFO: jsr POS
; Fill in the button state
jsr BUTTONS ; Will not touch ptr1
ldy #MOUSE_INFO::BUTTONS
sta (ptr1),y
rts
;----------------------------------------------------------------------------
; IOCTL: Driver-defined entry point. The wrapper will pass a pointer to ioctl-
; specific data in ptr1, and the ioctl code in .A.
; Must return an error code in .XA.
;
IOCTL: lda #<MOUSE_ERR_INV_IOCTL ; We don't support ioctls, for now
ldx #>MOUSE_ERR_INV_IOCTL
rts
;----------------------------------------------------------------------------
; IRQ: IRQ handler entry point. Called as a subroutine, but in the IRQ context
; (so, be careful). The routine MUST return carry set if the interrupt has been
; 'handled' -- which means that the interrupt source is gone. Otherwise, it
; MUST return carry clear.
;
IRQ:
; Record the state of the buttons.
; Try to avoid crosstalk between the keyboard and the lightpen.
ldy #%00000000 ; Set ports A and B to input
sty CIA1_DDRB
sty CIA1_DDRA ; Keyboard won't look like buttons
lda CIA1_PRB ; Read Control-Port 1
dec CIA1_DDRA ; Set port A back to output
eor #%11111111 ; Bit goes up when button goes down
sta Buttons
bze @L0
lda #%11101111 ; (Don't change bit that feeds VIC-II)
sta CIA1_DDRB ; Buttons won't look like keyboard
sty CIA1_PRB ; Set "all keys pushed"
; Read the VIC-II lightpen registers.
@L0: lda VIC_LPEN_Y
cmp OldPenY
; Skip processing if nothing has changed.
beq @SkipY
sta OldPenY
; Subtract the height of the top border, so that the lightpen co-ordinate
; will match the TGI co-ordinate.
sub #50
tay ; Remember low byte
ldx #>0
; Limit the Y co-ordinate to the bounding box.
txa
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: tya
jsr MoveY
@SkipY: lda VIC_LPEN_X
cmp OldPenX
; Skip processing if nothing has changed.
beq @SkipX
sta OldPenX
; Adjust the co-ordinate by the calibration offset.
sub XOffset
; Calculate the new X co-ordinate (--> .AY --> .XY).
; The VIC-II register is eight bits; but, the screen co-ordinate is nine bits.
; Therefor, the VIC-II number is doubled. Then, it points to every other pixel;
; but, it can reach across the screen.
asl a
tay ; Remember low byte
lda #>0
rol a
tax
; Limit the X co-ordinate 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: tya
jsr MoveX
; Done
@SkipX: clc ; Interrupt not "handled"
rts
; Move the lightpen pointer to the new Y pos.
MoveY: sta YPos
stx YPos+1
jmp CMOVEY
; Move the lightpen pointer to the new X pos.
MoveX: sta XPos
stx XPos+1
jmp CMOVEX

282
testcode/lib/pen-test.c Normal file
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/*
** Test program for lightpen drivers. Will work for the C64/C128.
**
** 2001-09-13, Ullrich von Bassewitz
** 2013-05-24, Greg King
**
*/
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <mouse.h>
#include <conio.h>
#include <ctype.h>
#include <dbg.h>
#define max(a,b) (((a) > (b)) ? (a) : (b))
#define min(a,b) (((a) < (b)) ? (a) : (b))
/* Statically linked driver */
#define DYN_DRV 0
#ifdef __C64__
# if DYN_DRV
# define mouse_stddrv "c64-inkwell.mou"
# else
# define mouse_static_stddrv c64_inkwell_mou
# endif
#endif
#ifdef __C128__
# if DYN_DRV
# define mouse_stddrv "c128-inkwell.mou"
# else
# define mouse_static_stddrv c128_inkwell_mou
# endif
#endif
#if defined(__C64__) || defined(__C128__)
/* Addresses of data for sprite 0 */
#if defined(__C64__)
# define SPRITE0_DATA ((unsigned char[64])0x0340)
# define SPRITE0_PTR ((unsigned char *)0x07F8)
#elif defined(__C128__)
# define SPRITE0_DATA ((unsigned char[64])0x0E00)
# define SPRITE0_PTR ((unsigned char *)0x07F8)
#endif
/* The lightpen sprite (an arrow) */
static const unsigned char PenSprite[64] = {
0xFF, 0xFF, 0xFF,
0xFC, 0x00, 0x00,
0xF8, 0x00, 0x00,
0xFC, 0x00, 0x00,
0xDE, 0x00, 0x00,
0x8F, 0x00, 0x00,
0x87, 0x80, 0x00,
0x83, 0xC0, 0x00,
0x81, 0xE0, 0x00,
0x80, 0xF0, 0x00,
0x80, 0x78, 0x00,
0x80, 0x38, 0x00,
0x80, 0x00, 0x00,
0x80, 0x00, 0x00,
0x80, 0x00, 0x00,
0x80, 0x00, 0x00,
0x80, 0x00, 0x00,
0x80, 0x00, 0x00,
0x80, 0x00, 0x00,
0x80, 0x00, 0x00,
0x80, 0x00, 0x00
};
#endif /* __C64__ or __C128__ */
static void __fastcall__ CheckError (const char* S, unsigned char Error)
{
if (Error != MOUSE_ERR_OK) {
cprintf ("%s: %s(%u)\r\n", S, mouse_geterrormsg (Error), Error);
exit (EXIT_FAILURE);
}
}
#if DYN_DRV
static void DoWarning (void)
/* Warn the user that a lightpen driver is needed for this program. */
{
cprintf ("Warning: This program needs a lightpen\r\n"
"driver with the name\r\n"
" %s\r\n"
"on disk! Press 'y' if you have it; or,\r\n"
"any other key to exit.\r\n", mouse_stddrv);
if (tolower (cgetc ()) != 'y') {
exit (EXIT_SUCCESS);
}
cprintf ("OK. Please wait patiently...\r\n");
}
#endif
static void __fastcall__ ShowState (unsigned char Jailed, unsigned char Invisible)
/* Display jail and cursor states. */
{
cclearxy (0, 7, 40);
gotoxy (0, 7);
cprintf ("Lightpen cursor is %svisible%s.", Invisible? "in" : "", Jailed? " and jailed" : "");
}
int main (void)
{
struct mouse_info info;
struct mouse_box full_box, small_box;
char C;
unsigned char width, height;
bool Invisible = false, Done = false, Jailed = false;
/* Only the VIC-II has a lightpen connection. */
#ifdef __C128__
videomode (VIDEOMODE_40x25);
#endif
/* Initiate the debugger. */
DbgInit (0);
/* Set dark-on-light colors. Clear the screen. */
#ifdef __CBM__
(void) bordercolor (COLOR_GRAY2);
(void) bgcolor (COLOR_WHITE);
(void) textcolor (COLOR_GRAY1);
#else
(void) bordercolor (COLOR_BLUE);
(void) bgcolor (COLOR_WHITE);
(void) textcolor (COLOR_BLACK);
#endif
cursor (0);
clrscr ();
#if defined(__C64__) || defined(__C128__)
/* Copy the sprite data. */
memcpy (SPRITE0_DATA, PenSprite, sizeof PenSprite);
/* Set the VIC-II sprite pointer. */
*SPRITE0_PTR = (unsigned) SPRITE0_DATA / sizeof SPRITE0_DATA;
/* Set the color of sprite 0. */
VIC.spr0_color = COLOR_BLACK;
#endif
#if DYN_DRV
/* Output a warning about the driver that is needed. */
DoWarning ();
/* Load and install the lightpen driver. */
CheckError ("mouse_load_driver",
mouse_load_driver (&mouse_def_callbacks, mouse_stddrv));
#else
/* Install the lightpen driver. */
CheckError ("mouse_install",
mouse_install (&mouse_def_callbacks, mouse_static_stddrv));
#endif
/* Get the initial lightpen bounding box. */
mouse_getbox (&full_box);
screensize (&width, &height);
top:
/* Print a help line. */
clrscr ();
/* revers (1); */
cputs (" d)ebug h)ide q)uit s)how j)ail ");
/* revers (0); */
/* Put a cross at the center of the screen. */
gotoxy (width / 2 - 3, height / 2 - 1);
cprintf ("%3u,%3u\r\n%*s\xDB", width / 2 * 8 + 4, height / 2 * 8 + 4,
width / 2, "");
/* Custom driver debugging line */
cprintf ("\n\r\n Calibration X-offset = %u", (*(unsigned char *)0x3ff) * 2);
/* Expose the arrow. */
mouse_show ();
ShowState (Jailed, Invisible);
/* Test loop */
do {
/* Get the current lightpen co-ordinates and button states;
** and, print them.
*/
mouse_info (&info);
gotoxy (0, 2);
cprintf (" X = %3d\r\n", info.pos.x);
cprintf (" Y = %3d\r\n", info.pos.y);
cprintf (" B1 = %c\r\n", (info.buttons & MOUSE_BTN_LEFT) ? 0x5F : '^');
cprintf (" B2 = %c", (info.buttons & MOUSE_BTN_RIGHT) ? 0x5F : '^');
/* Handle user input. */
if (kbhit ()) {
cclearxy (1, 9, 23);
switch (tolower (C = cgetc ())) {
case 'd':
BREAK();
/* The debugger might have changed the colors.
** Restore them.
*/
#ifdef __CBM__
(void) bordercolor (COLOR_GRAY2);
(void) bgcolor (COLOR_WHITE);
(void) textcolor (COLOR_GRAY1);
#else
(void) bordercolor (COLOR_BLUE);
(void) bgcolor (COLOR_WHITE);
(void) textcolor (COLOR_BLACK);
#endif
goto top;
case 'h':
mouse_hide ();
ShowState (Jailed, ++Invisible);
break;
case 'j':
if (Jailed) {
mouse_setbox (&full_box);
Jailed = false;
} else {
small_box.minx = max (info.pos.x - 10, full_box.minx);
small_box.miny = max (info.pos.y - 10, full_box.miny);
small_box.maxx = min (info.pos.x + 10, full_box.maxx);
small_box.maxy = min (info.pos.y + 10, full_box.maxy);
mouse_setbox (&small_box);
Jailed = true;
}
ShowState (Jailed, Invisible);
break;
case 's':
mouse_show ();
if (Invisible) {
ShowState (Jailed, --Invisible);
}
break;
case 'q':
Done = true;
break;
default:
gotoxy (1, 9);
cprintf ("Spurious character: $%02X", C);
}
}
} while (!Done);
#if DYN_DRV
/* Uninstall and unload the lightpen driver. */
CheckError ("mouse_unload", mouse_unload ());
#else
/* Uninstall the lightpen driver. */
CheckError ("mouse_uninstall", mouse_uninstall ());
#endif
/* Say goodbye. */
cputsxy (0, 16, "Goodbye!");
return EXIT_SUCCESS;
}