2 ; Ullrich von Bassewitz, 2003-12-28
4 ; Common functions of the mouse driver API.
9 .condes mouse_irq, 2 ; Export as IRQ handler
11 .include "mouse-kernel.inc"
15 ;----------------------------------------------------------------------------
20 _mouse_drv: .res 2 ; Pointer to driver
22 _mouse_hidden: .res 1 ; Mouse visibility flag
24 ; Jump table for the driver functions.
27 mouse_install: jmp return0
28 mouse_uninstall:jmp return0
29 mouse_hide: jmp return0
30 mouse_show: jmp return0
31 mouse_box: jmp return0
32 mouse_move: jmp return0
33 mouse_buttons: jmp return0
34 mouse_pos: jmp return0
35 mouse_info: jmp return0
36 mouse_ioctl: jmp return0
37 mouse_irq: .byte $60, $00, $00 ; RTS plus two dummy bytes
39 ; Driver header signature
41 mouse_sig: .byte $6d, $6f, $75, MOUSE_API_VERSION ; "mou", version
44 ;----------------------------------------------------------------------------
45 ; unsigned char __fastcall__ mouse_install (void* driver);
46 ; /* Install an already loaded driver. Returns an error code. */
56 ; Check the driver signature
58 ldy #.sizeof(mouse_sig)-1
70 ; Copy the jump vectors
72 ldy #MOUSE_HDR::JUMPTAB
74 @L1: inx ; Skip the JMP opcode
75 jsr copy ; Copy one byte
76 jsr copy ; Copy one byte
77 cpy #(MOUSE_HDR::JUMPTAB + .sizeof(MOUSE_HDR::JUMPTAB))
80 jsr mouse_install ; Call driver install routine
82 ldy mouse_irq+2 ; Check high byte of IRQ vector
83 beq @L2 ; Jump if vector invalid
84 ldy #$4C ; Jump opcode
85 sty mouse_irq ; Activate IRQ routine
88 ; Driver signature invalid
91 lda #MOUSE_ERR_INV_DRIVER
95 ; Copy one byte from the jump vectors
103 ;----------------------------------------------------------------------------
104 ; unsigned char __fastcall__ mouse_uninstall (void);
105 ; /* Uninstall the currently loaded driver. Returns an error code. */
108 jsr mouse_uninstall ; Call driver routine
110 lda #$60 ; RTS opcode
111 sta mouse_irq ; Disable IRQ entry point
113 mouse_clear_ptr: ; External entry point
116 sta _mouse_drv+1 ; Clear the driver pointer