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- /*
- * 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
-
-
- /*
- * 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)
- {
- if (relative_mouse) {
- mouse_x += x; mouse_y += y;
- } else {
- mouse_x = x; mouse_y = y;
- }
- }
-
-
- /*
- * Mouse button pressed
- */
-
- void ADBMouseDown(int button)
- {
- mouse_button[button] = true;
- }
-
-
- /*
- * First mouse button released
- */
-
- void ADBMouseUp(int button)
- {
- mouse_button[button] = false;
- }
-
-
- /*
- * 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 position so that it won't change during processing
- int mx = mouse_x;
- int my = mouse_y;
-
- 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 || mouse_button[0] != old_mouse_button[0] || mouse_button[1] != old_mouse_button[1] || mouse_button[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) | (mouse_button[0] ? 0 : 0x80));
- WriteMacInt8(tmp_data + 2, (mx & 0x7f) | (mouse_button[1] ? 0 : 0x80));
- WriteMacInt8(tmp_data + 3, ((my >> 3) & 0x70) | ((mx >> 7) & 0x07) | (mouse_button[2] ? 0x08 : 0x88));
- } else {
- // 100/200 dpi mode
- WriteMacInt8(tmp_data, 2);
- WriteMacInt8(tmp_data + 1, (my & 0x7f) | (mouse_button[0] ? 0 : 0x80));
- WriteMacInt8(tmp_data + 2, (mx & 0x7f) | (mouse_button[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);
-
- mouse_x = mouse_y = 0;
- old_mouse_button[0] = mouse_button[0];
- old_mouse_button[1] = mouse_button[1];
- old_mouse_button[2] = mouse_button[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 (mouse_button[0] != old_mouse_button[0]) {
- 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, mouse_button[0] ? 0 : 0x80);
- WriteMacInt8(tmp_data + 2, mouse_button[1] ? 0 : 0x80);
- WriteMacInt8(tmp_data + 3, mouse_button[2] ? 0x08 : 0x88);
- } else {
- // 100/200 dpi mode
- WriteMacInt8(tmp_data, 2);
- WriteMacInt8(tmp_data + 1, mouse_button[0] ? 0 : 0x80);
- WriteMacInt8(tmp_data + 2, mouse_button[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] = mouse_button[0];
- old_mouse_button[1] = mouse_button[1];
- old_mouse_button[2] = mouse_button[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);
- }
-