--- /dev/null
+#
+# Makefile for the mouse driver library
+#
+
+.SUFFIXES: .o .s .c
+
+#--------------------------------------------------------------------------
+# Rules
+
+%.o: %.c
+ @$(CC) $(CFLAGS) $<
+ @$(AS) -g -o $@ $(AFLAGS) $(*).s
+
+%.o: %.s
+ @$(AS) -g -o $@ $(AFLAGS) $<
+
+#--------------------------------------------------------------------------
+# Object files
+
+C_OBJS = mouse_load.o
+
+S_OBJS = mouse-kernel.o
+
+
+#--------------------------------------------------------------------------
+# Targets
+
+.PHONY: all clean zap
+
+all: $(C_OBJS) $(S_OBJS)
+
+clean:
+ @$(RM) *~ $(C_OBJS:.o=.s) $(C_OBJS) $(S_OBJS)
+
+zap: clean
+
--- /dev/null
+;
+; Ullrich von Bassewitz, 2003-12-28
+;
+; Common functions of the mouse driver API.
+;
+
+ .import return0
+ .importzp ptr1
+
+ .include "mouse-kernel.inc"
+
+
+
+;----------------------------------------------------------------------------
+; Variables
+
+
+.bss
+_mouse_drv: .res 2 ; Pointer to driver
+
+; Jump table for the driver functions.
+.data
+mouse_vectors:
+mouse_install: jmp return0
+mouse_uninstall:jmp return0
+mouse_hide: jmp return0
+mouse_show: jmp return0
+mouse_box: jmp return0
+mouse_move: jmp return0
+mouse_buttons: jmp return0
+mouse_pos: jmp return0
+mouse_info: jmp return0
+
+; Driver header signature
+.rodata
+mouse_sig: .byte $6d, $6f, $75, MOUSE_API_VERSION ; "mou", version
+
+
+;----------------------------------------------------------------------------
+; unsigned char __fastcall__ mouse_install (void* driver);
+; /* Install an already loaded driver. Returns an error code. */
+
+
+
+_mouse_install:
+ sta _mouse_drv
+ sta ptr1
+ stx _mouse_drv+1
+ stx ptr1+1
+
+; Check the driver signature
+
+ ldy #.sizeof(mouse_sig)-1
+@L0: lda (ptr1),y
+ cmp mouse_sig,y
+ bne inv_drv
+ dey
+ bpl @L0
+
+; Copy the jump vectors
+
+ ldy #MOUSE_HDR::JUMPTAB
+ ldx #0
+@L1: inx ; Skip the JMP opcode
+ jsr copy ; Copy one byte
+ jsr copy ; Copy one byte
+ cpy #(MOUSE_HDR::JUMPTAB + .sizeof(MOUSE_HDR::JUMPTAB))
+ bne @L1
+
+ jmp mouse_install ; Call driver install routine
+
+; Driver signature invalid
+
+inv_drv:
+ lda #MOUSE_ERR_INV_DRIVER
+ ldx #0
+ rts
+
+; Copy one byte from the jump vectors
+
+copy: lda (ptr1),y
+ sta mouse_vectors,x
+ iny
+ inx
+ rts
+
+;----------------------------------------------------------------------------
+; unsigned char __fastcall__ mouse_uninstall (void);
+; /* Uninstall the currently loaded driver. Returns an error code. */
+
+_mouse_uninstall:
+ jsr mouse_uninstall ; Call driver routine
+
+mouse_clear_ptr: ; External entry point
+ lda #0
+ sta _mouse_drv
+ sta _mouse_drv+1 ; Clear the driver pointer
+
+ tax
+ rts ; Return zero
+
--- /dev/null
+/*****************************************************************************/
+/* */
+/* mouse_load.c */
+/* */
+/* Loader for mouse drivers modules */
+/* */
+/* */
+/* */
+/* (C) 2002-2003 Ullrich von Bassewitz */
+/* Römerstrasse 52 */
+/* D-70794 Filderstadt */
+/* EMail: uz@cc65.org */
+/* */
+/* */
+/* This software is provided 'as-is', without any expressed or implied */
+/* warranty. In no event will the authors be held liable for any damages */
+/* arising from the use of this software. */
+/* */
+/* Permission is granted to anyone to use this software for any purpose, */
+/* including commercial applications, and to alter it and redistribute it */
+/* freely, subject to the following restrictions: */
+/* */
+/* 1. The origin of this software must not be misrepresented; you must not */
+/* claim that you wrote the original software. If you use this software */
+/* in a product, an acknowledgment in the product documentation would be */
+/* appreciated but is not required. */
+/* 2. Altered source versions must be plainly marked as such, and must not */
+/* be misrepresented as being the original software. */
+/* 3. This notice may not be removed or altered from any source */
+/* distribution. */
+/* */
+/*****************************************************************************/
+
+
+
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <modload.h>
+#include <mouse.h>
+#include <mouse/mouse-kernel.h>
+
+
+
+unsigned char __fastcall__ mouse_load_driver (const char* name)
+/* Load a mouse driver and return an error code */
+{
+ static struct mod_ctrl ctrl = {
+ read /* Read from disk */
+ };
+ unsigned char Res;
+
+ /* Check if we do already have a driver loaded. If so, remove it. */
+ if (mouse_drv != 0) {
+ mouse_uninstall ();
+ }
+
+ /* Now open the file */
+ ctrl.callerdata = open (name, O_RDONLY);
+ if (ctrl.callerdata >= 0) {
+
+ /* Load the module */
+ Res = mod_load (&ctrl);
+
+ /* Close the input file */
+ close (ctrl.callerdata);
+
+ /* Check the return code */
+ if (Res == MLOAD_OK) {
+
+ /* Check the driver signature, install the driver */
+ return mouse_install (ctrl.module);
+
+ }
+ }
+
+ /* Error loading the driver */
+ return MOUSE_ERR_CANNOT_LOAD;
+}
+
+
+
projects / cc65 / commitdiff