BasiliskII/src/adb.cpp

/*
 *  adb.cpp - ADB emulation (mouse/keyboard)
 *
 *  Basilisk II (C) 1997-2001 Christian Bauer
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/*
 *  SEE ALSO
 *    Inside Macintosh: Devices, chapter 5 "ADB Manager"
 *    Technote HW 01: "ADB - The Untold Story: Space Aliens Ate My Mouse"
 */

#include <stdlib.h>

#include "sysdeps.h"
#include "cpu_emulation.h"
#include "main.h"
#include "emul_op.h"
#include "video.h"
#include "adb.h"

#define DEBUG 0
#include "debug.h"


// Global variables
static int mouse_x = 0, mouse_y = 0;                                                    // Mouse position
static int old_mouse_x = 0, old_mouse_y = 0;
static bool mouse_button[3] = {false, false, false};                    // Mouse button states
static bool old_mouse_button[3] = {false, false, false};
static bool relative_mouse = false;

static uint8 key_states[16];                            // Key states (Mac keycodes)
#define MATRIX(code) (key_states[code >> 3] & (1 << (~code & 7)))

// Keyboard event buffer (Mac keycodes with up/down flag)
const int KEY_BUFFER_SIZE = 16;
static uint8 key_buffer[KEY_BUFFER_SIZE];
static unsigned int key_read_ptr = 0, key_write_ptr = 0;

static uint8 mouse_reg_3[2] = {0x63, 0x01};     // Mouse ADB register 3

static uint8 key_reg_2[2] = {0xff, 0xff};       // Keyboard ADB register 2
static uint8 key_reg_3[2] = {0x62, 0x05};       // Keyboard ADB register 3

// ADB mouse input state lock (for platforms that use separate input thread)
static B2_mutex *mouse_lock;


/*
 *  Initialize ADB emulation
 */

void ADBInit(void)
{
        mouse_lock = B2_create_mutex();
}


/*
 *  Exit ADB emulation
 */

void ADBExit(void)
{
        if (mouse_lock) {
                B2_delete_mutex(mouse_lock);
                mouse_lock = NULL;
        }
}


/*
 *  ADBOp() replacement
 */

void ADBOp(uint8 op, uint8 *data)
{
        D(bug("ADBOp op %02x, data %02x %02x %02x\n", op, data[0], data[1], data[2]));

        // ADB reset?
        if ((op & 0x0f) == 0) {
                mouse_reg_3[0] = 0x63;
                mouse_reg_3[1] = 0x01;
                key_reg_2[0] = 0xff;
                key_reg_2[1] = 0xff;
                key_reg_3[0] = 0x62;
                key_reg_3[1] = 0x05;
                return;
        }

        // Cut op into fields
        uint8 adr = op >> 4;
        uint8 cmd = (op >> 2) & 3;
        uint8 reg = op & 3;

        // Check which device was addressed and act accordingly
        if (adr == (mouse_reg_3[0] & 0x0f)) {

                // Mouse
                if (cmd == 2) {

                        // Listen
                        switch (reg) {
                                case 3:         // Address/HandlerID
                                        if (data[2] == 0xfe)                    // Change address
                                                mouse_reg_3[0] = (mouse_reg_3[0] & 0xf0) | (data[1] & 0x0f);
                                        else if (data[2] == 1 || data[2] == 2 || data[2] == 4)  // Change device handler ID
                                                mouse_reg_3[1] = data[2];
                                        else if (data[2] == 0x00)               // Change address and enable bit
                                                mouse_reg_3[0] = (mouse_reg_3[0] & 0xd0) | (data[1] & 0x2f);
                                        break;
                        }

                } else if (cmd == 3) {

                        // Talk
                        switch (reg) {
                                case 1:         // Extended mouse protocol
                                        data[0] = 8;
                                        data[1] = 'a';                          // Identifier
                                        data[2] = 'p';
                                        data[3] = 'p';
                                        data[4] = 'l';
                                        data[5] = 300 >> 8;                     // Resolution (dpi)
                                        data[6] = 300 & 0xff;
                                        data[7] = 1;                            // Class (mouse)
                                        data[8] = 3;                            // Number of buttons
                                        break;
                                case 3:         // Address/HandlerID
                                        data[0] = 2;
                                        data[1] = mouse_reg_3[0] & 0xf0 | (rand() & 0x0f);
                                        data[2] = mouse_reg_3[1];
                                        break;
                                default:
                                        data[0] = 0;
                                        break;
                        }
                }
                D(bug(" mouse reg 3 %02x%02x\n", mouse_reg_3[0], mouse_reg_3[1]));

        } else if (adr == (key_reg_3[0] & 0x0f)) {

                // Keyboard
                if (cmd == 2) {

                        // Listen
                        switch (reg) {
                                case 2:         // LEDs/Modifiers
                                        key_reg_2[0] = data[1];
                                        key_reg_2[1] = data[2];
                                        break;
                                case 3:         // Address/HandlerID
                                        if (data[2] == 0xfe)                    // Change address
                                                        key_reg_3[0] = (key_reg_3[0] & 0xf0) | (data[1] & 0x0f);
                                        else if (data[2] == 0x00)               // Change address and enable bit
                                                key_reg_3[0] = (key_reg_3[0] & 0xd0) | (data[1] & 0x2f);
                                        break;
                        }

                } else if (cmd == 3) {

                        // Talk
                        switch (reg) {
                                case 2: {       // LEDs/Modifiers
                                        uint8 reg2hi = 0xff;
                                        uint8 reg2lo = key_reg_2[1] | 0xf8;
                                        if (MATRIX(0x6b))       // Scroll Lock
                                                reg2lo &= ~0x40;
                                        if (MATRIX(0x47))       // Num Lock
                                                reg2lo &= ~0x80;
                                        if (MATRIX(0x37))       // Command
                                                reg2hi &= ~0x01;
                                        if (MATRIX(0x3a))       // Option
                                                reg2hi &= ~0x02;
                                        if (MATRIX(0x38))       // Shift
                                                reg2hi &= ~0x04;
                                        if (MATRIX(0x36))       // Control
                                                reg2hi &= ~0x08;
                                        if (MATRIX(0x39))       // Caps Lock
                                                reg2hi &= ~0x20;
                                        if (MATRIX(0x75))       // Delete
                                                reg2hi &= ~0x40;
                                        data[0] = 2;
                                        data[1] = reg2hi;
                                        data[2] = reg2lo;
                                        break;
                                }
                                case 3:         // Address/HandlerID
                                        data[0] = 2;
                                        data[1] = key_reg_3[0] & 0xf0 | (rand() & 0x0f);
                                        data[2] = key_reg_3[1];
                                        break;
                                default:
                                        data[0] = 0;
                                        break;
                        }
                }
                D(bug(" keyboard reg 3 %02x%02x\n", key_reg_3[0], key_reg_3[1]));

        } else                                                                                          // Unknown address
                if (cmd == 3)
                        data[0] = 0;                                                            // Talk: 0 bytes of data
}


/*
 *  Mouse was moved (x/y are absolute or relative, depending on ADBSetRelMouseMode())
 */

void ADBMouseMoved(int x, int y)
{
        B2_lock_mutex(mouse_lock);
        if (relative_mouse) {
                mouse_x += x; mouse_y += y;
        } else {
                mouse_x = x; mouse_y = y;
        }
        B2_unlock_mutex(mouse_lock);
}


/* 
 *  Mouse button pressed
 */

void ADBMouseDown(int button)
{
        B2_lock_mutex(mouse_lock);
        mouse_button[button] = true;
        B2_unlock_mutex(mouse_lock);
}


/*
 *  First mouse button released
 */

void ADBMouseUp(int button)
{
        B2_lock_mutex(mouse_lock);
        mouse_button[button] = false;
        B2_unlock_mutex(mouse_lock);
}


/*
 *  Set mouse mode (absolute or relative)
 */

void ADBSetRelMouseMode(bool relative)
{
        relative_mouse = relative;
}


/*
 *  Key pressed ("code" is the Mac key code)
 */

void ADBKeyDown(int code)
{
        // Add keycode to buffer
        key_buffer[key_write_ptr] = code;
        key_write_ptr = (key_write_ptr + 1) % KEY_BUFFER_SIZE;

        // Set key in matrix
        key_states[code >> 3] |= (1 << (~code & 7));
}


/*
 *  Key released ("code" is the Mac key code)
 */

void ADBKeyUp(int code)
{
        // Add keycode to buffer
        key_buffer[key_write_ptr] = code | 0x80;        // Key-up flag
        key_write_ptr = (key_write_ptr + 1) % KEY_BUFFER_SIZE;

        // Clear key in matrix
        key_states[code >> 3] &= ~(1 << (~code & 7));
}


/*
 *  ADB interrupt function (executed as part of 60Hz interrupt)
 */

void ADBInterrupt(void)
{
        M68kRegisters r;

        // Return if ADB is not initialized
        uint32 adb_base = ReadMacInt32(0xcf8);
        if (!adb_base || adb_base == 0xffffffff)
                return;
        uint32 tmp_data = adb_base + 0x163;     // Temporary storage for faked ADB data

        // Get mouse state
        B2_lock_mutex(mouse_lock);
        int mx = mouse_x;
        int my = mouse_y;
        if (relative_mouse)
                mouse_x = mouse_y = 0;
        int mb[3] = {mouse_button[0], mouse_button[1], mouse_button[2]};
        B2_unlock_mutex(mouse_lock);

        uint32 key_base = adb_base + 4;
        uint32 mouse_base = adb_base + 16;

        if (relative_mouse) {

                // Mouse movement (relative) and buttons
                if (mx != 0 || my != 0 || mb[0] != old_mouse_button[0] || mb[1] != old_mouse_button[1] || mb[2] != old_mouse_button[2]) {

                        // Call mouse ADB handler
                        if (mouse_reg_3[1] == 4) {
                                // Extended mouse protocol
                                WriteMacInt8(tmp_data, 3);
                                WriteMacInt8(tmp_data + 1, (my & 0x7f) | (mb[0] ? 0 : 0x80));
                                WriteMacInt8(tmp_data + 2, (mx & 0x7f) | (mb[1] ? 0 : 0x80));
                                WriteMacInt8(tmp_data + 3, ((my >> 3) & 0x70) | ((mx >> 7) & 0x07) | (mb[2] ? 0x08 : 0x88));
                        } else {
                                // 100/200 dpi mode
                                WriteMacInt8(tmp_data, 2);
                                WriteMacInt8(tmp_data + 1, (my & 0x7f) | (mb[0] ? 0 : 0x80));
                                WriteMacInt8(tmp_data + 2, (mx & 0x7f) | (mb[1] ? 0 : 0x80));
                        }       
                        r.a[0] = tmp_data;
                        r.a[1] = ReadMacInt32(mouse_base);
                        r.a[2] = ReadMacInt32(mouse_base + 4);
                        r.a[3] = adb_base;
                        r.d[0] = (mouse_reg_3[0] << 4) | 0x0c;  // Talk 0
                        Execute68k(r.a[1], &r);

                        old_mouse_button[0] = mb[0];
                        old_mouse_button[1] = mb[1];
                        old_mouse_button[2] = mb[2];
                }

        } else {

                // Update mouse position (absolute)
                if (mx != old_mouse_x || my != old_mouse_y) {
#ifdef POWERPC_ROM
                        static const uint16 proc[] = {
                                0x2f08,         // move.l a0,-(sp)
                                0x2f00,         // move.l d0,-(sp)
                                0x2f01,         // move.l d1,-(sp)
                                0x7001,         // moveq #1,d0 (MoveTo)
                                0xaadb,         // CursorDeviceDispatch
                                M68K_RTS
                        };
                        r.a[0] = ReadMacInt32(mouse_base + 4);
                        r.d[0] = mx;
                        r.d[1] = my;
                        Execute68k((uint32)proc, &r);
#else
                        WriteMacInt16(0x82a, mx);
                        WriteMacInt16(0x828, my);
                        WriteMacInt16(0x82e, mx);
                        WriteMacInt16(0x82c, my);
                        WriteMacInt8(0x8ce, ReadMacInt8(0x8cf));        // CrsrCouple -> CrsrNew
#endif
                        old_mouse_x = mx;
                        old_mouse_y = my;
                }

                // Send mouse button events
                if (mb[0] != old_mouse_button[0] || mb[1] != old_mouse_button[1] || mb[2] != old_mouse_button[2]) {
                        uint32 mouse_base = adb_base + 16;

                        // Call mouse ADB handler
                        if (mouse_reg_3[1] == 4) {
                                // Extended mouse protocol
                                WriteMacInt8(tmp_data, 3);
                                WriteMacInt8(tmp_data + 1, mb[0] ? 0 : 0x80);
                                WriteMacInt8(tmp_data + 2, mb[1] ? 0 : 0x80);
                                WriteMacInt8(tmp_data + 3, mb[2] ? 0x08 : 0x88);
                        } else {
                                // 100/200 dpi mode
                                WriteMacInt8(tmp_data, 2);
                                WriteMacInt8(tmp_data + 1, mb[0] ? 0 : 0x80);
                                WriteMacInt8(tmp_data + 2, mb[1] ? 0 : 0x80);
                        }
                        r.a[0] = tmp_data;
                        r.a[1] = ReadMacInt32(mouse_base);
                        r.a[2] = ReadMacInt32(mouse_base + 4);
                        r.a[3] = adb_base;
                        r.d[0] = (mouse_reg_3[0] << 4) | 0x0c;  // Talk 0
                        Execute68k(r.a[1], &r);

                        old_mouse_button[0] = mb[0];
                        old_mouse_button[1] = mb[1];
                        old_mouse_button[2] = mb[2];
                }
        }

        // Process accumulated keyboard events
        while (key_read_ptr != key_write_ptr) {

                // Read keyboard event
                uint8 mac_code = key_buffer[key_read_ptr];
                key_read_ptr = (key_read_ptr + 1) % KEY_BUFFER_SIZE;

                // Call keyboard ADB handler
                WriteMacInt8(tmp_data, 2);
                WriteMacInt8(tmp_data + 1, mac_code);
                WriteMacInt8(tmp_data + 2, mac_code == 0x7f ? 0x7f : 0xff);     // Power key is special
                r.a[0] = tmp_data;
                r.a[1] = ReadMacInt32(key_base);
                r.a[2] = ReadMacInt32(key_base + 4);
                r.a[3] = adb_base;
                r.d[0] = (key_reg_3[0] << 4) | 0x0c;    // Talk 0
                Execute68k(r.a[1], &r);
        }

        // Clear temporary data
        WriteMacInt32(tmp_data, 0);
        WriteMacInt32(tmp_data + 4, 0);
}
Revision:	1.6
Committed:	2001-07-03T15:59:45Z (22 years, 11 months ago) by cebix
Branch:	MAIN
Changes since 1.5:	+56 -20 lines
Log Message:	- added support for platform-independant mutexes, currently only properly implemented under Unix - adb.cpp uses mutexes for thread-safe mouse handling - video_x.cpp: pressing Ctrl-F5 in windowed mode switches to a "grabbed" relative mouse mode, useful for some games - video_x.cpp: fixed some bugs relating to the hotkeys (key releases are no longer treated as hotkeys)
#	User	Rev	Content
1	cebix	1.1	/*
2			* adb.cpp - ADB emulation (mouse/keyboard)
3			*
4	cebix	1.5	* Basilisk II (C) 1997-2001 Christian Bauer
5	cebix	1.1	*
6			* This program is free software; you can redistribute it and/or modify
7			* it under the terms of the GNU General Public License as published by
8			* the Free Software Foundation; either version 2 of the License, or
9			* (at your option) any later version.
10			*
11			* This program is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19			*/
20
21			/*
22			* SEE ALSO
23			* Inside Macintosh: Devices, chapter 5 "ADB Manager"
24			* Technote HW 01: "ADB - The Untold Story: Space Aliens Ate My Mouse"
25			*/
26
27			#include <stdlib.h>
28
29			#include "sysdeps.h"
30			#include "cpu_emulation.h"
31			#include "main.h"
32	cebix	1.4	#include "emul_op.h"
33	cebix	1.1	#include "video.h"
34			#include "adb.h"
35
36			#define DEBUG 0
37			#include "debug.h"
38
39
40			// Global variables
41			static int mouse_x = 0, mouse_y = 0; // Mouse position
42			static int old_mouse_x = 0, old_mouse_y = 0;
43			static bool mouse_button[3] = {false, false, false}; // Mouse button states
44			static bool old_mouse_button[3] = {false, false, false};
45			static bool relative_mouse = false;
46
47			static uint8 key_states[16]; // Key states (Mac keycodes)
48			#define MATRIX(code) (key_states[code >> 3] & (1 << (~code & 7)))
49
50			// Keyboard event buffer (Mac keycodes with up/down flag)
51			const int KEY_BUFFER_SIZE = 16;
52			static uint8 key_buffer[KEY_BUFFER_SIZE];
53			static unsigned int key_read_ptr = 0, key_write_ptr = 0;
54
55			static uint8 mouse_reg_3[2] = {0x63, 0x01}; // Mouse ADB register 3
56
57			static uint8 key_reg_2[2] = {0xff, 0xff}; // Keyboard ADB register 2
58			static uint8 key_reg_3[2] = {0x62, 0x05}; // Keyboard ADB register 3
59
60	cebix	1.6	// ADB mouse input state lock (for platforms that use separate input thread)
61			static B2_mutex *mouse_lock;
62
63
64			/*
65			* Initialize ADB emulation
66			*/
67
68			void ADBInit(void)
69			{
70			mouse_lock = B2_create_mutex();
71			}
72
73
74			/*
75			* Exit ADB emulation
76			*/
77
78			void ADBExit(void)
79			{
80			if (mouse_lock) {
81			B2_delete_mutex(mouse_lock);
82			mouse_lock = NULL;
83			}
84			}
85
86	cebix	1.1
87			/*
88			* ADBOp() replacement
89			*/
90
91			void ADBOp(uint8 op, uint8 *data)
92			{
93			D(bug("ADBOp op %02x, data %02x %02x %02x\n", op, data[0], data[1], data[2]));
94
95			// ADB reset?
96			if ((op & 0x0f) == 0) {
97			mouse_reg_3[0] = 0x63;
98			mouse_reg_3[1] = 0x01;
99			key_reg_2[0] = 0xff;
100			key_reg_2[1] = 0xff;
101			key_reg_3[0] = 0x62;
102			key_reg_3[1] = 0x05;
103			return;
104			}
105
106			// Cut op into fields
107			uint8 adr = op >> 4;
108			uint8 cmd = (op >> 2) & 3;
109			uint8 reg = op & 3;
110
111			// Check which device was addressed and act accordingly
112			if (adr == (mouse_reg_3[0] & 0x0f)) {
113
114			// Mouse
115			if (cmd == 2) {
116
117			// Listen
118			switch (reg) {
119			case 3: // Address/HandlerID
120			if (data[2] == 0xfe) // Change address
121			mouse_reg_3[0] = (mouse_reg_3[0] & 0xf0) \| (data[1] & 0x0f);
122			else if (data[2] == 1 \|\| data[2] == 2 \|\| data[2] == 4) // Change device handler ID
123			mouse_reg_3[1] = data[2];
124			else if (data[2] == 0x00) // Change address and enable bit
125			mouse_reg_3[0] = (mouse_reg_3[0] & 0xd0) \| (data[1] & 0x2f);
126			break;
127			}
128
129			} else if (cmd == 3) {
130
131			// Talk
132			switch (reg) {
133			case 1: // Extended mouse protocol
134			data[0] = 8;
135			data[1] = 'a'; // Identifier
136			data[2] = 'p';
137			data[3] = 'p';
138			data[4] = 'l';
139			data[5] = 300 >> 8; // Resolution (dpi)
140			data[6] = 300 & 0xff;
141			data[7] = 1; // Class (mouse)
142			data[8] = 3; // Number of buttons
143			break;
144			case 3: // Address/HandlerID
145			data[0] = 2;
146			data[1] = mouse_reg_3[0] & 0xf0 \| (rand() & 0x0f);
147			data[2] = mouse_reg_3[1];
148			break;
149			default:
150			data[0] = 0;
151			break;
152			}
153			}
154			D(bug(" mouse reg 3 %02x%02x\n", mouse_reg_3[0], mouse_reg_3[1]));
155
156			} else if (adr == (key_reg_3[0] & 0x0f)) {
157
158			// Keyboard
159			if (cmd == 2) {
160
161			// Listen
162			switch (reg) {
163			case 2: // LEDs/Modifiers
164			key_reg_2[0] = data[1];
165			key_reg_2[1] = data[2];
166			break;
167			case 3: // Address/HandlerID
168			if (data[2] == 0xfe) // Change address
169			key_reg_3[0] = (key_reg_3[0] & 0xf0) \| (data[1] & 0x0f);
170			else if (data[2] == 0x00) // Change address and enable bit
171			key_reg_3[0] = (key_reg_3[0] & 0xd0) \| (data[1] & 0x2f);
172			break;
173			}
174
175			} else if (cmd == 3) {
176
177			// Talk
178			switch (reg) {
179			case 2: { // LEDs/Modifiers
180			uint8 reg2hi = 0xff;
181			uint8 reg2lo = key_reg_2[1] \| 0xf8;
182			if (MATRIX(0x6b)) // Scroll Lock
183			reg2lo &= ~0x40;
184			if (MATRIX(0x47)) // Num Lock
185			reg2lo &= ~0x80;
186			if (MATRIX(0x37)) // Command
187			reg2hi &= ~0x01;
188			if (MATRIX(0x3a)) // Option
189			reg2hi &= ~0x02;
190			if (MATRIX(0x38)) // Shift
191			reg2hi &= ~0x04;
192			if (MATRIX(0x36)) // Control
193			reg2hi &= ~0x08;
194			if (MATRIX(0x39)) // Caps Lock
195			reg2hi &= ~0x20;
196			if (MATRIX(0x75)) // Delete
197			reg2hi &= ~0x40;
198			data[0] = 2;
199			data[1] = reg2hi;
200			data[2] = reg2lo;
201			break;
202			}
203			case 3: // Address/HandlerID
204			data[0] = 2;
205			data[1] = key_reg_3[0] & 0xf0 \| (rand() & 0x0f);
206			data[2] = key_reg_3[1];
207			break;
208			default:
209			data[0] = 0;
210			break;
211			}
212			}
213			D(bug(" keyboard reg 3 %02x%02x\n", key_reg_3[0], key_reg_3[1]));
214
215			} else // Unknown address
216			if (cmd == 3)
217			data[0] = 0; // Talk: 0 bytes of data
218			}
219
220
221			/*
222	cebix	1.4	* Mouse was moved (x/y are absolute or relative, depending on ADBSetRelMouseMode())
223	cebix	1.1	*/
224
225			void ADBMouseMoved(int x, int y)
226			{
227	cebix	1.6	B2_lock_mutex(mouse_lock);
228	cebix	1.1	if (relative_mouse) {
229			mouse_x += x; mouse_y += y;
230			} else {
231			mouse_x = x; mouse_y = y;
232			}
233	cebix	1.6	B2_unlock_mutex(mouse_lock);
234	cebix	1.1	}
235
236
237			/*
238			* Mouse button pressed
239			*/
240
241			void ADBMouseDown(int button)
242			{
243	cebix	1.6	B2_lock_mutex(mouse_lock);
244	cebix	1.1	mouse_button[button] = true;
245	cebix	1.6	B2_unlock_mutex(mouse_lock);
246	cebix	1.1	}
247
248
249			/*
250			* First mouse button released
251			*/
252
253			void ADBMouseUp(int button)
254			{
255	cebix	1.6	B2_lock_mutex(mouse_lock);
256	cebix	1.1	mouse_button[button] = false;
257	cebix	1.6	B2_unlock_mutex(mouse_lock);
258	cebix	1.1	}
259
260
261			/*
262			* Set mouse mode (absolute or relative)
263			*/
264
265			void ADBSetRelMouseMode(bool relative)
266			{
267			relative_mouse = relative;
268			}
269
270
271			/*
272			* Key pressed ("code" is the Mac key code)
273			*/
274
275			void ADBKeyDown(int code)
276			{
277			// Add keycode to buffer
278			key_buffer[key_write_ptr] = code;
279			key_write_ptr = (key_write_ptr + 1) % KEY_BUFFER_SIZE;
280
281			// Set key in matrix
282			key_states[code >> 3] \|= (1 << (~code & 7));
283			}
284
285
286			/*
287			* Key released ("code" is the Mac key code)
288			*/
289
290			void ADBKeyUp(int code)
291			{
292			// Add keycode to buffer
293			key_buffer[key_write_ptr] = code \| 0x80; // Key-up flag
294			key_write_ptr = (key_write_ptr + 1) % KEY_BUFFER_SIZE;
295
296			// Clear key in matrix
297			key_states[code >> 3] &= ~(1 << (~code & 7));
298			}
299
300
301			/*
302			* ADB interrupt function (executed as part of 60Hz interrupt)
303			*/
304
305			void ADBInterrupt(void)
306			{
307			M68kRegisters r;
308
309			// Return if ADB is not initialized
310			uint32 adb_base = ReadMacInt32(0xcf8);
311			if (!adb_base \|\| adb_base == 0xffffffff)
312			return;
313			uint32 tmp_data = adb_base + 0x163; // Temporary storage for faked ADB data
314
315	cebix	1.6	// Get mouse state
316			B2_lock_mutex(mouse_lock);
317	cebix	1.1	int mx = mouse_x;
318			int my = mouse_y;
319	cebix	1.6	if (relative_mouse)
320			mouse_x = mouse_y = 0;
321			int mb[3] = {mouse_button[0], mouse_button[1], mouse_button[2]};
322			B2_unlock_mutex(mouse_lock);
323	cebix	1.1
324	cebix	1.4	uint32 key_base = adb_base + 4;
325			uint32 mouse_base = adb_base + 16;
326
327	cebix	1.1	if (relative_mouse) {
328
329			// Mouse movement (relative) and buttons
330	cebix	1.6	if (mx != 0 \|\| my != 0 \|\| mb[0] != old_mouse_button[0] \|\| mb[1] != old_mouse_button[1] \|\| mb[2] != old_mouse_button[2]) {
331	cebix	1.1
332			// Call mouse ADB handler
333			if (mouse_reg_3[1] == 4) {
334			// Extended mouse protocol
335	cebix	1.2	WriteMacInt8(tmp_data, 3);
336	cebix	1.6	WriteMacInt8(tmp_data + 1, (my & 0x7f) \| (mb[0] ? 0 : 0x80));
337			WriteMacInt8(tmp_data + 2, (mx & 0x7f) \| (mb[1] ? 0 : 0x80));
338			WriteMacInt8(tmp_data + 3, ((my >> 3) & 0x70) \| ((mx >> 7) & 0x07) \| (mb[2] ? 0x08 : 0x88));
339	cebix	1.1	} else {
340			// 100/200 dpi mode
341	cebix	1.2	WriteMacInt8(tmp_data, 2);
342	cebix	1.6	WriteMacInt8(tmp_data + 1, (my & 0x7f) \| (mb[0] ? 0 : 0x80));
343			WriteMacInt8(tmp_data + 2, (mx & 0x7f) \| (mb[1] ? 0 : 0x80));
344	cebix	1.1	}
345			r.a[0] = tmp_data;
346			r.a[1] = ReadMacInt32(mouse_base);
347			r.a[2] = ReadMacInt32(mouse_base + 4);
348			r.a[3] = adb_base;
349			r.d[0] = (mouse_reg_3[0] << 4) \| 0x0c; // Talk 0
350			Execute68k(r.a[1], &r);
351
352	cebix	1.6	old_mouse_button[0] = mb[0];
353			old_mouse_button[1] = mb[1];
354			old_mouse_button[2] = mb[2];
355	cebix	1.1	}
356
357			} else {
358
359			// Update mouse position (absolute)
360			if (mx != old_mouse_x \|\| my != old_mouse_y) {
361	cebix	1.4	#ifdef POWERPC_ROM
362			static const uint16 proc[] = {
363			0x2f08, // move.l a0,-(sp)
364			0x2f00, // move.l d0,-(sp)
365			0x2f01, // move.l d1,-(sp)
366			0x7001, // moveq #1,d0 (MoveTo)
367			0xaadb, // CursorDeviceDispatch
368			M68K_RTS
369			};
370			r.a[0] = ReadMacInt32(mouse_base + 4);
371			r.d[0] = mx;
372			r.d[1] = my;
373			Execute68k((uint32)proc, &r);
374			#else
375	cebix	1.1	WriteMacInt16(0x82a, mx);
376			WriteMacInt16(0x828, my);
377			WriteMacInt16(0x82e, mx);
378			WriteMacInt16(0x82c, my);
379			WriteMacInt8(0x8ce, ReadMacInt8(0x8cf)); // CrsrCouple -> CrsrNew
380	cebix	1.4	#endif
381	cebix	1.1	old_mouse_x = mx;
382			old_mouse_y = my;
383			}
384
385			// Send mouse button events
386	cebix	1.6	if (mb[0] != old_mouse_button[0] \|\| mb[1] != old_mouse_button[1] \|\| mb[2] != old_mouse_button[2]) {
387	cebix	1.1	uint32 mouse_base = adb_base + 16;
388
389			// Call mouse ADB handler
390			if (mouse_reg_3[1] == 4) {
391			// Extended mouse protocol
392	cebix	1.2	WriteMacInt8(tmp_data, 3);
393	cebix	1.6	WriteMacInt8(tmp_data + 1, mb[0] ? 0 : 0x80);
394			WriteMacInt8(tmp_data + 2, mb[1] ? 0 : 0x80);
395			WriteMacInt8(tmp_data + 3, mb[2] ? 0x08 : 0x88);
396	cebix	1.1	} else {
397			// 100/200 dpi mode
398	cebix	1.2	WriteMacInt8(tmp_data, 2);
399	cebix	1.6	WriteMacInt8(tmp_data + 1, mb[0] ? 0 : 0x80);
400			WriteMacInt8(tmp_data + 2, mb[1] ? 0 : 0x80);
401	cebix	1.1	}
402			r.a[0] = tmp_data;
403			r.a[1] = ReadMacInt32(mouse_base);
404			r.a[2] = ReadMacInt32(mouse_base + 4);
405			r.a[3] = adb_base;
406			r.d[0] = (mouse_reg_3[0] << 4) \| 0x0c; // Talk 0
407			Execute68k(r.a[1], &r);
408
409	cebix	1.6	old_mouse_button[0] = mb[0];
410			old_mouse_button[1] = mb[1];
411			old_mouse_button[2] = mb[2];
412	cebix	1.1	}
413			}
414
415			// Process accumulated keyboard events
416			while (key_read_ptr != key_write_ptr) {
417
418			// Read keyboard event
419			uint8 mac_code = key_buffer[key_read_ptr];
420			key_read_ptr = (key_read_ptr + 1) % KEY_BUFFER_SIZE;
421
422			// Call keyboard ADB handler
423	cebix	1.2	WriteMacInt8(tmp_data, 2);
424			WriteMacInt8(tmp_data + 1, mac_code);
425			WriteMacInt8(tmp_data + 2, mac_code == 0x7f ? 0x7f : 0xff); // Power key is special
426	cebix	1.1	r.a[0] = tmp_data;
427			r.a[1] = ReadMacInt32(key_base);
428			r.a[2] = ReadMacInt32(key_base + 4);
429			r.a[3] = adb_base;
430			r.d[0] = (key_reg_3[0] << 4) \| 0x0c; // Talk 0
431			Execute68k(r.a[1], &r);
432			}
433
434			// Clear temporary data
435			WriteMacInt32(tmp_data, 0);
436			WriteMacInt32(tmp_data + 4, 0);
437			}