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cebix |
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/* |
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* adb.cpp - ADB emulation (mouse/keyboard) |
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* |
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* Basilisk II (C) 1997-1999 Christian Bauer |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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/* |
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* SEE ALSO |
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* Inside Macintosh: Devices, chapter 5 "ADB Manager" |
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* Technote HW 01: "ADB - The Untold Story: Space Aliens Ate My Mouse" |
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*/ |
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#include <stdlib.h> |
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#include "sysdeps.h" |
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#include "cpu_emulation.h" |
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#include "main.h" |
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#include "video.h" |
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#include "adb.h" |
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#define DEBUG 0 |
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#include "debug.h" |
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// Global variables |
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static int mouse_x = 0, mouse_y = 0; // Mouse position |
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static int old_mouse_x = 0, old_mouse_y = 0; |
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static bool mouse_button[3] = {false, false, false}; // Mouse button states |
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static bool old_mouse_button[3] = {false, false, false}; |
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static bool relative_mouse = false; |
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static uint8 key_states[16]; // Key states (Mac keycodes) |
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#define MATRIX(code) (key_states[code >> 3] & (1 << (~code & 7))) |
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// Keyboard event buffer (Mac keycodes with up/down flag) |
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const int KEY_BUFFER_SIZE = 16; |
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static uint8 key_buffer[KEY_BUFFER_SIZE]; |
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static unsigned int key_read_ptr = 0, key_write_ptr = 0; |
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static uint8 mouse_reg_3[2] = {0x63, 0x01}; // Mouse ADB register 3 |
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static uint8 key_reg_2[2] = {0xff, 0xff}; // Keyboard ADB register 2 |
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static uint8 key_reg_3[2] = {0x62, 0x05}; // Keyboard ADB register 3 |
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/* |
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* ADBOp() replacement |
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*/ |
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void ADBOp(uint8 op, uint8 *data) |
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{ |
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D(bug("ADBOp op %02x, data %02x %02x %02x\n", op, data[0], data[1], data[2])); |
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// ADB reset? |
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if ((op & 0x0f) == 0) { |
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mouse_reg_3[0] = 0x63; |
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mouse_reg_3[1] = 0x01; |
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key_reg_2[0] = 0xff; |
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key_reg_2[1] = 0xff; |
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key_reg_3[0] = 0x62; |
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key_reg_3[1] = 0x05; |
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return; |
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} |
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// Cut op into fields |
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uint8 adr = op >> 4; |
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uint8 cmd = (op >> 2) & 3; |
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uint8 reg = op & 3; |
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// Check which device was addressed and act accordingly |
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if (adr == (mouse_reg_3[0] & 0x0f)) { |
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// Mouse |
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if (cmd == 2) { |
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// Listen |
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switch (reg) { |
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case 3: // Address/HandlerID |
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if (data[2] == 0xfe) // Change address |
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mouse_reg_3[0] = (mouse_reg_3[0] & 0xf0) | (data[1] & 0x0f); |
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else if (data[2] == 1 || data[2] == 2 || data[2] == 4) // Change device handler ID |
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mouse_reg_3[1] = data[2]; |
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else if (data[2] == 0x00) // Change address and enable bit |
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mouse_reg_3[0] = (mouse_reg_3[0] & 0xd0) | (data[1] & 0x2f); |
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break; |
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} |
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} else if (cmd == 3) { |
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// Talk |
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switch (reg) { |
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case 1: // Extended mouse protocol |
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data[0] = 8; |
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data[1] = 'a'; // Identifier |
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data[2] = 'p'; |
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data[3] = 'p'; |
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data[4] = 'l'; |
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data[5] = 300 >> 8; // Resolution (dpi) |
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data[6] = 300 & 0xff; |
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data[7] = 1; // Class (mouse) |
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data[8] = 3; // Number of buttons |
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break; |
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case 3: // Address/HandlerID |
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data[0] = 2; |
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data[1] = mouse_reg_3[0] & 0xf0 | (rand() & 0x0f); |
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data[2] = mouse_reg_3[1]; |
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break; |
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default: |
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data[0] = 0; |
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break; |
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} |
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} |
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D(bug(" mouse reg 3 %02x%02x\n", mouse_reg_3[0], mouse_reg_3[1])); |
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} else if (adr == (key_reg_3[0] & 0x0f)) { |
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// Keyboard |
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if (cmd == 2) { |
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// Listen |
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switch (reg) { |
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case 2: // LEDs/Modifiers |
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key_reg_2[0] = data[1]; |
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key_reg_2[1] = data[2]; |
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break; |
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case 3: // Address/HandlerID |
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if (data[2] == 0xfe) // Change address |
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key_reg_3[0] = (key_reg_3[0] & 0xf0) | (data[1] & 0x0f); |
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else if (data[2] == 0x00) // Change address and enable bit |
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key_reg_3[0] = (key_reg_3[0] & 0xd0) | (data[1] & 0x2f); |
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break; |
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} |
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} else if (cmd == 3) { |
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// Talk |
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switch (reg) { |
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case 2: { // LEDs/Modifiers |
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uint8 reg2hi = 0xff; |
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uint8 reg2lo = key_reg_2[1] | 0xf8; |
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if (MATRIX(0x6b)) // Scroll Lock |
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reg2lo &= ~0x40; |
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if (MATRIX(0x47)) // Num Lock |
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reg2lo &= ~0x80; |
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if (MATRIX(0x37)) // Command |
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reg2hi &= ~0x01; |
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if (MATRIX(0x3a)) // Option |
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reg2hi &= ~0x02; |
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if (MATRIX(0x38)) // Shift |
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reg2hi &= ~0x04; |
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if (MATRIX(0x36)) // Control |
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reg2hi &= ~0x08; |
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if (MATRIX(0x39)) // Caps Lock |
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reg2hi &= ~0x20; |
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if (MATRIX(0x75)) // Delete |
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reg2hi &= ~0x40; |
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data[0] = 2; |
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data[1] = reg2hi; |
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data[2] = reg2lo; |
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break; |
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} |
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case 3: // Address/HandlerID |
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data[0] = 2; |
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data[1] = key_reg_3[0] & 0xf0 | (rand() & 0x0f); |
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data[2] = key_reg_3[1]; |
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break; |
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default: |
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data[0] = 0; |
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break; |
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} |
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} |
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D(bug(" keyboard reg 3 %02x%02x\n", key_reg_3[0], key_reg_3[1])); |
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} else // Unknown address |
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if (cmd == 3) |
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data[0] = 0; // Talk: 0 bytes of data |
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} |
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/* |
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* Mouse was moved (x/y are absolute or relative, depending on ADBSetMouseMode()) |
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*/ |
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void ADBMouseMoved(int x, int y) |
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{ |
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if (relative_mouse) { |
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mouse_x += x; mouse_y += y; |
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} else { |
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mouse_x = x; mouse_y = y; |
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} |
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} |
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/* |
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* Mouse button pressed |
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*/ |
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void ADBMouseDown(int button) |
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{ |
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mouse_button[button] = true; |
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} |
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/* |
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* First mouse button released |
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*/ |
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void ADBMouseUp(int button) |
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{ |
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mouse_button[button] = false; |
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} |
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/* |
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* Set mouse mode (absolute or relative) |
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*/ |
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void ADBSetRelMouseMode(bool relative) |
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{ |
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relative_mouse = relative; |
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} |
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/* |
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* Key pressed ("code" is the Mac key code) |
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*/ |
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void ADBKeyDown(int code) |
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{ |
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// Add keycode to buffer |
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key_buffer[key_write_ptr] = code; |
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key_write_ptr = (key_write_ptr + 1) % KEY_BUFFER_SIZE; |
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// Set key in matrix |
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key_states[code >> 3] |= (1 << (~code & 7)); |
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} |
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/* |
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* Key released ("code" is the Mac key code) |
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*/ |
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void ADBKeyUp(int code) |
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{ |
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// Add keycode to buffer |
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key_buffer[key_write_ptr] = code | 0x80; // Key-up flag |
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key_write_ptr = (key_write_ptr + 1) % KEY_BUFFER_SIZE; |
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// Clear key in matrix |
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key_states[code >> 3] &= ~(1 << (~code & 7)); |
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} |
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/* |
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* ADB interrupt function (executed as part of 60Hz interrupt) |
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*/ |
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void ADBInterrupt(void) |
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{ |
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M68kRegisters r; |
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// Return if ADB is not initialized |
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uint32 adb_base = ReadMacInt32(0xcf8); |
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if (!adb_base || adb_base == 0xffffffff) |
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return; |
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uint32 tmp_data = adb_base + 0x163; // Temporary storage for faked ADB data |
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// Get position so that it won't change during processing |
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int mx = mouse_x; |
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int my = mouse_y; |
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if (relative_mouse) { |
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// Mouse movement (relative) and buttons |
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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]) { |
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uint32 mouse_base = adb_base + 16; |
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uint8 *mouse_data = Mac2HostAddr(tmp_data); |
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// Call mouse ADB handler |
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if (mouse_reg_3[1] == 4) { |
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// Extended mouse protocol |
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mouse_data[0] = 3; |
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mouse_data[1] = (my & 0x7f) | (mouse_button[0] ? 0 : 0x80); |
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mouse_data[2] = (mx & 0x7f) | (mouse_button[1] ? 0 : 0x80); |
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mouse_data[3] = ((my >> 3) & 0x70) | ((mx >> 7) & 0x07) | (mouse_button[2] ? 0x08 : 0x88); |
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} else { |
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// 100/200 dpi mode |
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mouse_data[0] = 2; |
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mouse_data[1] = (my & 0x7f) | (mouse_button[0] ? 0 : 0x80); |
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mouse_data[2] = (mx & 0x7f) | (mouse_button[1] ? 0 : 0x80); |
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} |
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r.a[0] = tmp_data; |
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r.a[1] = ReadMacInt32(mouse_base); |
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r.a[2] = ReadMacInt32(mouse_base + 4); |
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r.a[3] = adb_base; |
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r.d[0] = (mouse_reg_3[0] << 4) | 0x0c; // Talk 0 |
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Execute68k(r.a[1], &r); |
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mouse_x = mouse_y = 0; |
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old_mouse_button[0] = mouse_button[0]; |
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old_mouse_button[1] = mouse_button[1]; |
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old_mouse_button[2] = mouse_button[2]; |
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} |
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} else { |
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// Update mouse position (absolute) |
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if (mx != old_mouse_x || my != old_mouse_y) { |
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WriteMacInt16(0x82a, mx); |
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WriteMacInt16(0x828, my); |
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WriteMacInt16(0x82e, mx); |
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WriteMacInt16(0x82c, my); |
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WriteMacInt8(0x8ce, ReadMacInt8(0x8cf)); // CrsrCouple -> CrsrNew |
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old_mouse_x = mx; |
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old_mouse_y = my; |
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} |
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// Send mouse button events |
| 333 |
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if (mouse_button[0] != old_mouse_button[0]) { |
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uint32 mouse_base = adb_base + 16; |
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uint8 *mouse_data = Mac2HostAddr(tmp_data); |
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// Call mouse ADB handler |
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if (mouse_reg_3[1] == 4) { |
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// Extended mouse protocol |
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mouse_data[0] = 3; |
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mouse_data[1] = mouse_button[0] ? 0 : 0x80; |
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mouse_data[2] = mouse_button[1] ? 0 : 0x80; |
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mouse_data[3] = mouse_button[2] ? 0x08 : 0x88; |
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} else { |
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// 100/200 dpi mode |
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mouse_data[0] = 2; |
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mouse_data[1] = mouse_button[0] ? 0 : 0x80; |
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mouse_data[2] = mouse_button[1] ? 0 : 0x80; |
| 349 |
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} |
| 350 |
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r.a[0] = tmp_data; |
| 351 |
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r.a[1] = ReadMacInt32(mouse_base); |
| 352 |
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r.a[2] = ReadMacInt32(mouse_base + 4); |
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r.a[3] = adb_base; |
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r.d[0] = (mouse_reg_3[0] << 4) | 0x0c; // Talk 0 |
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Execute68k(r.a[1], &r); |
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| 357 |
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old_mouse_button[0] = mouse_button[0]; |
| 358 |
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old_mouse_button[1] = mouse_button[1]; |
| 359 |
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|
old_mouse_button[2] = mouse_button[2]; |
| 360 |
|
|
} |
| 361 |
|
|
} |
| 362 |
|
|
|
| 363 |
|
|
// Process accumulated keyboard events |
| 364 |
|
|
uint32 key_base = adb_base + 4; |
| 365 |
|
|
uint8 *key_data = Mac2HostAddr(tmp_data); |
| 366 |
|
|
while (key_read_ptr != key_write_ptr) { |
| 367 |
|
|
|
| 368 |
|
|
// Read keyboard event |
| 369 |
|
|
uint8 mac_code = key_buffer[key_read_ptr]; |
| 370 |
|
|
key_read_ptr = (key_read_ptr + 1) % KEY_BUFFER_SIZE; |
| 371 |
|
|
|
| 372 |
|
|
// Call keyboard ADB handler |
| 373 |
|
|
key_data[0] = 2; |
| 374 |
|
|
key_data[1] = mac_code; |
| 375 |
|
|
key_data[2] = mac_code == 0x7f ? 0x7f : 0xff; // Power key is special |
| 376 |
|
|
r.a[0] = tmp_data; |
| 377 |
|
|
r.a[1] = ReadMacInt32(key_base); |
| 378 |
|
|
r.a[2] = ReadMacInt32(key_base + 4); |
| 379 |
|
|
r.a[3] = adb_base; |
| 380 |
|
|
r.d[0] = (key_reg_3[0] << 4) | 0x0c; // Talk 0 |
| 381 |
|
|
Execute68k(r.a[1], &r); |
| 382 |
|
|
} |
| 383 |
|
|
|
| 384 |
|
|
// Clear temporary data |
| 385 |
|
|
WriteMacInt32(tmp_data, 0); |
| 386 |
|
|
WriteMacInt32(tmp_data + 4, 0); |
| 387 |
|
|
} |
