142 lines
3.4 KiB
C++
142 lines
3.4 KiB
C++
/******************************************************************************/
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/* Mednafen Sega Saturn Emulation Module */
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/******************************************************************************/
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/* wheel.cpp:
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** Copyright (C) 2017 Mednafen Team
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**
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** This program is free software; you can redistribute it and/or
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** modify it under the terms of the GNU General Public License
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** as published by the Free Software Foundation; either version 2
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** of the License, or (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 Foundation, Inc.,
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** 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "common.h"
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#include "wheel.h"
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namespace MDFN_IEN_SS
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{
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IODevice_Wheel::IODevice_Wheel() : dbuttons(0)
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{
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}
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IODevice_Wheel::~IODevice_Wheel()
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{
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}
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void IODevice_Wheel::Power(void)
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{
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phase = -1;
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tl = true;
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data_out = 0x01;
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}
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void IODevice_Wheel::UpdateInput(const uint8* data, const int32 time_elapsed)
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{
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dbuttons = (dbuttons & 0xC) | (MDFN_de16lsb(&data[0]) & 0x07F3);
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//
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{
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int32 tmp = 32767 + MDFN_de16lsb(&data[0x2 + 2]) - MDFN_de16lsb(&data[0x2 + 0]);
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wheel = 1 + tmp * 253 / 65534;
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if(wheel >= 0x6F)
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dbuttons &= ~0x4;
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else if(wheel <= 0x67)
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dbuttons |= 0x4;
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if(wheel <= 0x8F)
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dbuttons &= ~0x8;
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else if(wheel >= 0x97)
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dbuttons |= 0x8;
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}
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}
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uint8 IODevice_Wheel::UpdateBus(const uint8 smpc_out, const uint8 smpc_out_asserted)
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{
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uint8 tmp;
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if(smpc_out & 0x40)
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{
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phase = -1;
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tl = true;
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data_out = 0x01;
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}
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else
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{
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if((bool)(smpc_out & 0x20) != tl)
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{
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if(phase < 0)
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{
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buffer[ 0] = 0x1;
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buffer[ 1] = 0x3;
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buffer[ 2] = (((dbuttons >> 0) & 0xF) ^ 0xF);
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buffer[ 3] = (((dbuttons >> 4) & 0xF) ^ 0xF);
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buffer[ 4] = (((dbuttons >> 8) & 0xF) ^ 0xF);
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buffer[ 5] = (((dbuttons >> 12) & 0xF) ^ 0xF);
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buffer[ 6] = ((wheel >> 4) & 0xF);
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buffer[ 7] = ((wheel >> 0) & 0xF);
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buffer[ 8] = 0x0;
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buffer[ 9] = 0x1;
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buffer[10] = 0x1;
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buffer[11] = ((wheel >> 0) & 0xF);
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buffer[12] = 0x0;
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buffer[13] = 0x1;
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buffer[14] = 0x1;
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buffer[15] = 0x1;
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}
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phase = (phase + 1) & 0xF;
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data_out = buffer[phase];
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tl = !tl;
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}
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}
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tmp = (tl << 4) | data_out;
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return (smpc_out & (smpc_out_asserted | 0xE0)) | (tmp &~ smpc_out_asserted);
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}
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IDIISG IODevice_Wheel_IDII =
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{
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{ "up", "L Gear Shift(Equiv. UP ↑)", 2, IDIT_BUTTON, "down" },
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{ "down", "R Gear Shift(Equiv. DOWN ↓)", 3, IDIT_BUTTON, "up" },
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{ NULL, "empty", 0, IDIT_BUTTON }, // left
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{ NULL, "empty", 0, IDIT_BUTTON }, // right
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{ "b", "B (R Group)", 9, IDIT_BUTTON },
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{ "c", "C (R Group)", 10, IDIT_BUTTON },
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{ "a", "A (R Group)", 8, IDIT_BUTTON },
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{ "start", "START", 7, IDIT_BUTTON },
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{ "z", "Z (L Group)", 4, IDIT_BUTTON },
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{ "y", "Y (L Group)", 5, IDIT_BUTTON },
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{ "x", "X (L Group)", 6, IDIT_BUTTON },
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{ NULL, "empty", 0, IDIT_BUTTON },
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{ NULL, "empty", 0, IDIT_BUTTON },
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{ NULL, "empty", 0, IDIT_BUTTON },
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{ NULL, "empty", 0, IDIT_BUTTON },
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{ NULL, "empty", 0, IDIT_BUTTON },
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{ "analog_left", "Analog LEFT ←", 0, IDIT_BUTTON_ANALOG },
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{ "analog_right", "Analog RIGHT →", 1, IDIT_BUTTON_ANALOG },
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};
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}
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