| 1 | // |
| 2 | // Joystick handler |
| 3 | // |
| 4 | // by cal2 |
| 5 | // GCC/SDL port by Niels Wagenaar (Linux/WIN32) and Caz (BeOS) |
| 6 | // Extensive rewrite by James Hammons |
| 7 | // (C) 2013 Underground Software |
| 8 | // |
| 9 | // JLH = James Hammons <jlhamm@acm.org> |
| 10 | // JPM = Jean-Paul Mari <djipi.mari@gmail.com> |
| 11 | // |
| 12 | // Who When What |
| 13 | // --- ---------- ------------------------------------------------------------- |
| 14 | // JLH 01/16/2010 Created this log ;-) |
| 15 | // JPM 06/06/2016 Visual Studio support |
| 16 | // |
| 17 | |
| 18 | #include "joystick.h" |
| 19 | #include <string.h> // For memset() |
| 20 | #include "gpu.h" |
| 21 | #include "jaguar.h" |
| 22 | #include "log.h" |
| 23 | #include "settings.h" |
| 24 | |
| 25 | // Global vars |
| 26 | |
| 27 | static uint8_t joystick_ram[4]; |
| 28 | uint8_t joypad0Buttons[21]; |
| 29 | uint8_t joypad1Buttons[21]; |
| 30 | bool audioEnabled = false; |
| 31 | bool joysticksEnabled = false; |
| 32 | |
| 33 | |
| 34 | bool GUIKeyHeld = false; |
| 35 | extern int start_logging; |
| 36 | int gpu_start_log = 0; |
| 37 | int op_start_log = 0; |
| 38 | int blit_start_log = 0; |
| 39 | int effect_start = 0; |
| 40 | int effect_start2 = 0, effect_start3 = 0, effect_start4 = 0, effect_start5 = 0, effect_start6 = 0; |
| 41 | bool interactiveMode = false; |
| 42 | bool iLeft, iRight, iToggle = false; |
| 43 | bool keyHeld1 = false, keyHeld2 = false, keyHeld3 = false; |
| 44 | int objectPtr = 0; |
| 45 | bool startMemLog = false; |
| 46 | extern bool doDSPDis, doGPUDis; |
| 47 | |
| 48 | bool blitterSingleStep = false; |
| 49 | bool bssGo = false; |
| 50 | bool bssHeld = false; |
| 51 | |
| 52 | |
| 53 | void JoystickInit(void) |
| 54 | { |
| 55 | JoystickReset(); |
| 56 | } |
| 57 | |
| 58 | |
| 59 | void JoystickExec(void) |
| 60 | { |
| 61 | gpu_start_log = 0; // Only log while key down! |
| 62 | effect_start = 0; |
| 63 | effect_start2 = effect_start3 = effect_start4 = effect_start5 = effect_start6 = 0; |
| 64 | blit_start_log = 0; |
| 65 | iLeft = iRight = false; |
| 66 | } |
| 67 | |
| 68 | |
| 69 | void JoystickReset(void) |
| 70 | { |
| 71 | memset(joystick_ram, 0x00, 4); |
| 72 | memset(joypad0Buttons, 0, 21); |
| 73 | memset(joypad1Buttons, 0, 21); |
| 74 | } |
| 75 | |
| 76 | |
| 77 | void JoystickDone(void) |
| 78 | { |
| 79 | } |
| 80 | |
| 81 | |
| 82 | uint16_t JoystickReadWord(uint32_t offset) |
| 83 | { |
| 84 | // E, D, B, 7 |
| 85 | uint8_t joypad0Offset[16] = { |
| 86 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x0C, 0xFF, 0xFF, 0xFF, 0x08, 0xFF, 0x04, 0x00, 0xFF |
| 87 | }; |
| 88 | uint8_t joypad1Offset[16] = { |
| 89 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0xFF, 0xFF, 0xFF, 0x04, 0xFF, 0x08, 0x0C, 0xFF |
| 90 | }; |
| 91 | |
| 92 | #ifdef _MSC_VER |
| 93 | #pragma message("Warning: No bounds checking done in JoystickReadByte!") |
| 94 | #else |
| 95 | #warning "No bounds checking done in JoystickReadByte!" |
| 96 | #endif // _MSC_VER |
| 97 | offset &= 0x03; |
| 98 | |
| 99 | if (offset == 0) |
| 100 | { |
| 101 | if (!joysticksEnabled) |
| 102 | return 0xFFFF; |
| 103 | |
| 104 | // Joystick data returns active low for buttons pressed, high for non- |
| 105 | // pressed. |
| 106 | uint16_t data = 0xFFFF; |
| 107 | uint8_t offset0 = joypad0Offset[joystick_ram[1] & 0x0F]; |
| 108 | uint8_t offset1 = joypad1Offset[(joystick_ram[1] >> 4) & 0x0F]; |
| 109 | |
| 110 | if (offset0 != 0xFF) |
| 111 | { |
| 112 | uint16_t mask[4] = { 0xFEFF, 0xFDFF, 0xFBFF, 0xF7FF }; |
| 113 | uint16_t msk2[4] = { 0xFFFF, 0xFFFD, 0xFFFB, 0xFFF7 }; |
| 114 | |
| 115 | for(uint8_t i=0; i<4; i++) |
| 116 | data &= (joypad0Buttons[offset0 + i] ? mask[i] : 0xFFFF); |
| 117 | |
| 118 | data &= msk2[offset0 / 4]; |
| 119 | } |
| 120 | |
| 121 | if (offset1 != 0xFF) |
| 122 | { |
| 123 | uint16_t mask[4] = { 0xEFFF, 0xDFFF, 0xBFFF, 0x7FFF }; |
| 124 | uint16_t msk2[4] = { 0xFF7F, 0xFFBF, 0xFFDF, 0xFFEF }; |
| 125 | |
| 126 | for(uint8_t i=0; i<4; i++) |
| 127 | data &= (joypad1Buttons[offset1 + i] ? mask[i] : 0xFFFF); |
| 128 | |
| 129 | data &= msk2[offset1 / 4]; |
| 130 | } |
| 131 | |
| 132 | return data; |
| 133 | } |
| 134 | else if (offset == 2) |
| 135 | { |
| 136 | // Hardware ID returns NTSC/PAL identification bit here |
| 137 | // N.B.: On real H/W, bit 7 is *always* zero...! |
| 138 | uint16_t data = 0xFF6F | (vjs.hardwareTypeNTSC ? 0x10 : 0x00); |
| 139 | |
| 140 | if (!joysticksEnabled) |
| 141 | return data; |
| 142 | |
| 143 | // Joystick data returns active low for buttons pressed, high for non- |
| 144 | // pressed. |
| 145 | uint8_t offset0 = joypad0Offset[joystick_ram[1] & 0x0F]; |
| 146 | uint8_t offset1 = joypad1Offset[(joystick_ram[1] >> 4) & 0x0F]; |
| 147 | |
| 148 | if (offset0 != 0xFF) |
| 149 | { |
| 150 | offset0 /= 4; // Make index 0, 1, 2, 3 instead of 0, 4, 8, 12 |
| 151 | uint8_t mask[4][2] = { { BUTTON_A, BUTTON_PAUSE }, { BUTTON_B, 0xFF }, { BUTTON_C, 0xFF }, { BUTTON_OPTION, 0xFF } }; |
| 152 | data &= (joypad0Buttons[mask[offset0][0]] ? 0xFFFD : 0xFFFF); |
| 153 | |
| 154 | if (mask[offset0][1] != 0xFF) |
| 155 | data &= (joypad0Buttons[mask[offset0][1]] ? 0xFFFE : 0xFFFF); |
| 156 | } |
| 157 | |
| 158 | if (offset1 != 0xFF) |
| 159 | { |
| 160 | offset1 /= 4; // Make index 0, 1, 2, 3 instead of 0, 4, 8, 12 |
| 161 | uint8_t mask[4][2] = { { BUTTON_A, BUTTON_PAUSE }, { BUTTON_B, 0xFF }, { BUTTON_C, 0xFF }, { BUTTON_OPTION, 0xFF } }; |
| 162 | data &= (joypad1Buttons[mask[offset1][0]] ? 0xFFF7 : 0xFFFF); |
| 163 | |
| 164 | if (mask[offset1][1] != 0xFF) |
| 165 | data &= (joypad1Buttons[mask[offset1][1]] ? 0xFFFB : 0xFFFF); |
| 166 | } |
| 167 | |
| 168 | return data; |
| 169 | } |
| 170 | |
| 171 | return 0xFFFF; |
| 172 | } |
| 173 | |
| 174 | |
| 175 | void JoystickWriteWord(uint32_t offset, uint16_t data) |
| 176 | { |
| 177 | #ifdef _MSC_VER |
| 178 | #pragma message("Warning: No bounds checking done for JoystickWriteWord!") |
| 179 | #else |
| 180 | #warning "No bounds checking done for JoystickWriteWord!" |
| 181 | #endif // _MSC_VER |
| 182 | offset &= 0x03; |
| 183 | joystick_ram[offset + 0] = (data >> 8) & 0xFF; |
| 184 | joystick_ram[offset + 1] = data & 0xFF; |
| 185 | |
| 186 | if (offset == 0) |
| 187 | { |
| 188 | audioEnabled = (data & 0x0100 ? true : false); |
| 189 | joysticksEnabled = (data & 0x8000 ? true : false); |
| 190 | } |
| 191 | } |
| 192 | |