2 ; Ullrich von Bassewitz, 2003-12-28
4 ; Common functions of the mouse driver API.
7 .import return0, popsreg, incsp2
8 .importzp sreg, ptr1, tmp1, tmp2
9 .interruptor mouse_irq ; 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
45 ;----------------------------------------------------------------------------
46 ; unsigned char __fastcall__ mouse_install (const struct mouse_callbacks* c,
48 ; /* 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 copyjv ; Copy one byte
76 jsr copyjv ; Copy one byte
77 cpy #(MOUSE_HDR::JUMPTAB + .sizeof(MOUSE_HDR::JUMPTAB))
80 ; Copy the callback vectors into the driver space
83 ldy #(MOUSE_HDR::CALLBACKS + .sizeof(MOUSE_HDR::CALLBACKS) - 1)
85 ldy #.sizeof(MOUSE_CALLBACKS)-1
91 dec tmp2 ; Skip opcode byte
95 ; Call driver install routine and check for errors
99 bne @L3 ; Bail out if install had errors
101 ; Install the IRQ vector if the driver needs it. A/X contains the error code
102 ; from mouse_install, so don't use it.
104 ldy mouse_irq+2 ; Check high byte of IRQ vector
105 beq @L3 ; Jump if vector invalid
106 ldy #$4C ; Jump opcode
107 sty mouse_irq ; Activate IRQ routine
110 ; Driver signature invalid. One word is still on the stack
113 lda #MOUSE_ERR_INV_DRIVER
117 ; Copy one byte from the jump vectors
125 ; Copy one byte from the callback vectors
134 ;----------------------------------------------------------------------------
135 ; unsigned char __fastcall__ mouse_uninstall (void);
136 ; /* Uninstall the currently loaded driver. Returns an error code. */
139 lda #$60 ; RTS opcode
140 sta mouse_irq ; Disable IRQ entry point
142 jsr mouse_uninstall ; Call driver routine
144 mouse_clear_ptr: ; External entry point
147 sta _mouse_drv+1 ; Clear the driver pointer