BasiliskII/src/adb.cpp

/*
 *  adb.cpp - ADB emulation (mouse/keyboard)
 *
 *  Basilisk II (C) 1997-2002 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 motion 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);
        SetInterruptFlag(INTFLAG_ADB);
        TriggerInterrupt();
}


/* 
 *  Mouse button pressed
 */

void ADBMouseDown(int button)
{
        mouse_button[button] = true;
        SetInterruptFlag(INTFLAG_ADB);
        TriggerInterrupt();
}


/*
 *  Mouse button released
 */

void ADBMouseUp(int button)
{
        mouse_button[button] = false;
        SetInterruptFlag(INTFLAG_ADB);
        TriggerInterrupt();
}


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

void ADBSetRelMouseMode(bool relative)
{
        if (relative_mouse != relative) {
                relative_mouse = relative;
                mouse_x = mouse_y = 0;
        }
}


/*
 *  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));

        // Trigger interrupt
        SetInterruptFlag(INTFLAG_ADB);
        TriggerInterrupt();
}


/*
 *  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));

        // Trigger interrupt
        SetInterruptFlag(INTFLAG_ADB);
        TriggerInterrupt();
}


/*
 *  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:	1.8
Committed:	2002-01-15T14:58:32Z (22 years, 10 months ago) by cebix
Branch:	MAIN
CVS Tags:	nigel-build-12, nigel-build-13, snapshot-15012002
Changes since 1.7:	+1 -1 lines
Log Message:	- documentation updates - 2001 -> 2002 - version 0.9 -> 1.0
#	Content
1	/*
2	* adb.cpp - ADB emulation (mouse/keyboard)
3	*
4	* Basilisk II (C) 1997-2002 Christian Bauer
5	*
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	#include "emul_op.h"
33	#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	// ADB mouse motion 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
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	* Mouse was moved (x/y are absolute or relative, depending on ADBSetRelMouseMode())
223	*/
224
225	void ADBMouseMoved(int x, int y)
226	{
227	B2_lock_mutex(mouse_lock);
228	if (relative_mouse) {
229	mouse_x += x; mouse_y += y;
230	} else {
231	mouse_x = x; mouse_y = y;
232	}
233	B2_unlock_mutex(mouse_lock);
234	SetInterruptFlag(INTFLAG_ADB);
235	TriggerInterrupt();
236	}
237
238
239	/*
240	* Mouse button pressed
241	*/
242
243	void ADBMouseDown(int button)
244	{
245	mouse_button[button] = true;
246	SetInterruptFlag(INTFLAG_ADB);
247	TriggerInterrupt();
248	}
249
250
251	/*
252	* Mouse button released
253	*/
254
255	void ADBMouseUp(int button)
256	{
257	mouse_button[button] = false;
258	SetInterruptFlag(INTFLAG_ADB);
259	TriggerInterrupt();
260	}
261
262
263	/*
264	* Set mouse mode (absolute or relative)
265	*/
266
267	void ADBSetRelMouseMode(bool relative)
268	{
269	if (relative_mouse != relative) {
270	relative_mouse = relative;
271	mouse_x = mouse_y = 0;
272	}
273	}
274
275
276	/*
277	* Key pressed ("code" is the Mac key code)
278	*/
279
280	void ADBKeyDown(int code)
281	{
282	// Add keycode to buffer
283	key_buffer[key_write_ptr] = code;
284	key_write_ptr = (key_write_ptr + 1) % KEY_BUFFER_SIZE;
285
286	// Set key in matrix
287	key_states[code >> 3] \|= (1 << (~code & 7));
288
289	// Trigger interrupt
290	SetInterruptFlag(INTFLAG_ADB);
291	TriggerInterrupt();
292	}
293
294
295	/*
296	* Key released ("code" is the Mac key code)
297	*/
298
299	void ADBKeyUp(int code)
300	{
301	// Add keycode to buffer
302	key_buffer[key_write_ptr] = code \| 0x80; // Key-up flag
303	key_write_ptr = (key_write_ptr + 1) % KEY_BUFFER_SIZE;
304
305	// Clear key in matrix
306	key_states[code >> 3] &= ~(1 << (~code & 7));
307
308	// Trigger interrupt
309	SetInterruptFlag(INTFLAG_ADB);
310	TriggerInterrupt();
311	}
312
313
314	/*
315	* ADB interrupt function (executed as part of 60Hz interrupt)
316	*/
317
318	void ADBInterrupt(void)
319	{
320	M68kRegisters r;
321
322	// Return if ADB is not initialized
323	uint32 adb_base = ReadMacInt32(0xcf8);
324	if (!adb_base \|\| adb_base == 0xffffffff)
325	return;
326	uint32 tmp_data = adb_base + 0x163; // Temporary storage for faked ADB data
327
328	// Get mouse state
329	B2_lock_mutex(mouse_lock);
330	int mx = mouse_x;
331	int my = mouse_y;
332	if (relative_mouse)
333	mouse_x = mouse_y = 0;
334	int mb[3] = {mouse_button[0], mouse_button[1], mouse_button[2]};
335	B2_unlock_mutex(mouse_lock);
336
337	uint32 key_base = adb_base + 4;
338	uint32 mouse_base = adb_base + 16;
339
340	if (relative_mouse) {
341
342	// Mouse movement (relative) and buttons
343	if (mx != 0 \|\| my != 0 \|\| mb[0] != old_mouse_button[0] \|\| mb[1] != old_mouse_button[1] \|\| mb[2] != old_mouse_button[2]) {
344
345	// Call mouse ADB handler
346	if (mouse_reg_3[1] == 4) {
347	// Extended mouse protocol
348	WriteMacInt8(tmp_data, 3);
349	WriteMacInt8(tmp_data + 1, (my & 0x7f) \| (mb[0] ? 0 : 0x80));
350	WriteMacInt8(tmp_data + 2, (mx & 0x7f) \| (mb[1] ? 0 : 0x80));
351	WriteMacInt8(tmp_data + 3, ((my >> 3) & 0x70) \| ((mx >> 7) & 0x07) \| (mb[2] ? 0x08 : 0x88));
352	} else {
353	// 100/200 dpi mode
354	WriteMacInt8(tmp_data, 2);
355	WriteMacInt8(tmp_data + 1, (my & 0x7f) \| (mb[0] ? 0 : 0x80));
356	WriteMacInt8(tmp_data + 2, (mx & 0x7f) \| (mb[1] ? 0 : 0x80));
357	}
358	r.a[0] = tmp_data;
359	r.a[1] = ReadMacInt32(mouse_base);
360	r.a[2] = ReadMacInt32(mouse_base + 4);
361	r.a[3] = adb_base;
362	r.d[0] = (mouse_reg_3[0] << 4) \| 0x0c; // Talk 0
363	Execute68k(r.a[1], &r);
364
365	old_mouse_button[0] = mb[0];
366	old_mouse_button[1] = mb[1];
367	old_mouse_button[2] = mb[2];
368	}
369
370	} else {
371
372	// Update mouse position (absolute)
373	if (mx != old_mouse_x \|\| my != old_mouse_y) {
374	#ifdef POWERPC_ROM
375	static const uint16 proc[] = {
376	0x2f08, // move.l a0,-(sp)
377	0x2f00, // move.l d0,-(sp)
378	0x2f01, // move.l d1,-(sp)
379	0x7001, // moveq #1,d0 (MoveTo)
380	0xaadb, // CursorDeviceDispatch
381	M68K_RTS
382	};
383	r.a[0] = ReadMacInt32(mouse_base + 4);
384	r.d[0] = mx;
385	r.d[1] = my;
386	Execute68k((uint32)proc, &r);
387	#else
388	WriteMacInt16(0x82a, mx);
389	WriteMacInt16(0x828, my);
390	WriteMacInt16(0x82e, mx);
391	WriteMacInt16(0x82c, my);
392	WriteMacInt8(0x8ce, ReadMacInt8(0x8cf)); // CrsrCouple -> CrsrNew
393	#endif
394	old_mouse_x = mx;
395	old_mouse_y = my;
396	}
397
398	// Send mouse button events
399	if (mb[0] != old_mouse_button[0] \|\| mb[1] != old_mouse_button[1] \|\| mb[2] != old_mouse_button[2]) {
400	uint32 mouse_base = adb_base + 16;
401
402	// Call mouse ADB handler
403	if (mouse_reg_3[1] == 4) {
404	// Extended mouse protocol
405	WriteMacInt8(tmp_data, 3);
406	WriteMacInt8(tmp_data + 1, mb[0] ? 0 : 0x80);
407	WriteMacInt8(tmp_data + 2, mb[1] ? 0 : 0x80);
408	WriteMacInt8(tmp_data + 3, mb[2] ? 0x08 : 0x88);
409	} else {
410	// 100/200 dpi mode
411	WriteMacInt8(tmp_data, 2);
412	WriteMacInt8(tmp_data + 1, mb[0] ? 0 : 0x80);
413	WriteMacInt8(tmp_data + 2, mb[1] ? 0 : 0x80);
414	}
415	r.a[0] = tmp_data;
416	r.a[1] = ReadMacInt32(mouse_base);
417	r.a[2] = ReadMacInt32(mouse_base + 4);
418	r.a[3] = adb_base;
419	r.d[0] = (mouse_reg_3[0] << 4) \| 0x0c; // Talk 0
420	Execute68k(r.a[1], &r);
421
422	old_mouse_button[0] = mb[0];
423	old_mouse_button[1] = mb[1];
424	old_mouse_button[2] = mb[2];
425	}
426	}
427
428	// Process accumulated keyboard events
429	while (key_read_ptr != key_write_ptr) {
430
431	// Read keyboard event
432	uint8 mac_code = key_buffer[key_read_ptr];
433	key_read_ptr = (key_read_ptr + 1) % KEY_BUFFER_SIZE;
434
435	// Call keyboard ADB handler
436	WriteMacInt8(tmp_data, 2);
437	WriteMacInt8(tmp_data + 1, mac_code);
438	WriteMacInt8(tmp_data + 2, mac_code == 0x7f ? 0x7f : 0xff); // Power key is special
439	r.a[0] = tmp_data;
440	r.a[1] = ReadMacInt32(key_base);
441	r.a[2] = ReadMacInt32(key_base + 4);
442	r.a[3] = adb_base;
443	r.d[0] = (key_reg_3[0] << 4) \| 0x0c; // Talk 0
444	Execute68k(r.a[1], &r);
445	}
446
447	// Clear temporary data
448	WriteMacInt32(tmp_data, 0);
449	WriteMacInt32(tmp_data + 4, 0);
450	}