mirror of
https://github.com/RetroDECK/Supermodel.git
synced 2024-11-26 07:35:40 +00:00
685 lines
18 KiB
C++
685 lines
18 KiB
C++
#include "Supermodel.h"
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#include <stdio.h>
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#include <math.h>
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bool CDriveBoard::IsAttached(void)
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{
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return m_attached;
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}
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bool CDriveBoard::IsSimulated(void)
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{
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return m_simulated;
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}
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void CDriveBoard::GetDIPSwitches(UINT8 &dip1, UINT8 &dip2)
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{
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dip1 = m_dip1;
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dip2 = m_dip2;
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}
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void CDriveBoard::SetDIPSwitches(UINT8 dip1, UINT8 dip2)
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{
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m_dip1 = dip1;
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m_dip2 = dip2;
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}
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unsigned CDriveBoard::GetSteeringStrength()
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{
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return ((~(m_dip1>>2))&7) + 1;
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}
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void CDriveBoard::SetSteeringStrength(unsigned steeringStrength)
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{
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m_dip1 = (m_dip1&0xE3) | (((~(steeringStrength - 1))&7)<<2);
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}
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void CDriveBoard::Get7SegDisplays(UINT8 &seg1Digit1, UINT8 &seg1Digit2, UINT8 &seg2Digit1, UINT8 &seg2Digit2)
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{
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seg1Digit1 = m_seg1Digit1;
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seg1Digit2 = m_seg1Digit2;
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seg2Digit1 = m_seg2Digit1;
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seg2Digit2 = m_seg2Digit2;
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}
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CZ80 *CDriveBoard::GetZ80(void)
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{
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return &m_z80;
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}
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void CDriveBoard::SaveState(CBlockFile *SaveState)
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{
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SaveState->NewBlock("DriveBoard", __FILE__);
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// Overall config
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SaveState->Write(&m_simulated, sizeof(m_simulated));
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// DIP switches and digit displays
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SaveState->Write(&m_dip1, sizeof(m_dip1));
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SaveState->Write(&m_dip2, sizeof(m_dip2));
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//SaveState->Write(&m_seg1Digit1, sizeof(m_seg1Digit1)); // No point in saving these
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//SaveState->Write(&m_seg1Digit2, sizeof(m_seg1Digit2));
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//SaveState->Write(&m_seg2Digit1, sizeof(m_seg2Digit1));
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//SaveState->Write(&m_seg2Digit2, sizeof(m_seg2Digit2));
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// RAM
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SaveState->Write(&m_ram, sizeof(m_ram));
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// Board emulation state
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SaveState->Write(&m_initialized, sizeof(m_initialized));
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SaveState->Write(&m_allowInterrupts, sizeof(m_allowInterrupts));
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SaveState->Write(&m_dataSent, sizeof(m_dataSent));
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SaveState->Write(&m_dataReceived, sizeof(m_dataReceived));
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SaveState->Write(&m_adcPortRead, sizeof(m_adcPortRead));
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SaveState->Write(&m_adcPortBit, sizeof(m_adcPortBit));
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SaveState->Write(&m_uncenterVal1, sizeof(m_uncenterVal1));
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SaveState->Write(&m_uncenterVal2, sizeof(m_uncenterVal2));
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// TODO - board simulation state
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// CPU
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m_z80.SaveState(SaveState, "DriveBoard Z80");
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}
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void CDriveBoard::LoadState(CBlockFile *SaveState)
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{
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if (SaveState->FindBlock("DriveBoard") != OKAY)
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{
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ErrorLog("Unable to load DriveBoard state. Save state file is corrupted.");
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return;
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}
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SaveState->Read(&m_simulated, sizeof(m_simulated));
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SaveState->Read(&m_dip1, sizeof(m_dip1));
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SaveState->Read(&m_dip2, sizeof(m_dip2));
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//SaveState->Read(&m_seg1Digit1, sizeof(m_seg1Digit1));
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//SaveState->Read(&m_seg1Digit2, sizeof(m_seg1Digit2));
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//SaveState->Read(&m_seg2Digit1, sizeof(m_seg2Digit1));
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//SaveState->Read(&m_seg2Digit2, sizeof(m_seg2Digit2));
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SaveState->Read(&m_ram, sizeof(m_ram));
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SaveState->Read(&m_initialized, sizeof(m_initialized));
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SaveState->Read(&m_allowInterrupts, sizeof(m_allowInterrupts));
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SaveState->Read(&m_dataSent, sizeof(m_dataSent));
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SaveState->Read(&m_dataReceived, sizeof(m_dataReceived));
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SaveState->Read(&m_adcPortRead, sizeof(m_adcPortRead));
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SaveState->Read(&m_adcPortBit, sizeof(m_adcPortBit));
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SaveState->Read(&m_uncenterVal1, sizeof(m_uncenterVal1));
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SaveState->Read(&m_uncenterVal2, sizeof(m_uncenterVal2));
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m_z80.LoadState(SaveState, "DriveBoard Z80");
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SendStopAll();
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}
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BOOL CDriveBoard::Init(const UINT8 *romPtr)
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{
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// Assign ROM
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m_rom = romPtr;
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// Check have a valid ROM and force feedback is enabled
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m_attached = m_rom && g_Config.enableFFeedback;
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if (!m_attached)
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return OKAY;
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// Allocate memory for RAM
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m_ram = new (std::nothrow) UINT8[RAM_SIZE];
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if (NULL == m_ram)
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{
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float ramSizeMB = (float)RAM_SIZE/(float)0x100000;
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return ErrorLog("Insufficient memoy for drive board (needs %1.1f MB).", ramSizeMB);
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}
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memset(m_ram, 0, RAM_SIZE);
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// Configure options
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m_simulated = g_Config.simulateDrvBoard;
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SetSteeringStrength(g_Config.steeringStrength);
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// Initialize Z80
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m_z80.Init(this, NULL);
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return OKAY;
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}
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void CDriveBoard::AttachInputs(CInputs *InputsPtr, unsigned gameInputFlags)
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{
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m_inputs = InputsPtr;
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m_inputFlags = gameInputFlags;
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DebugLog("DriveBoard attached inputs\n");
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}
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void CDriveBoard::Reset(void)
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{
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m_initialized = false;
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m_allowInterrupts = false;
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m_seg1Digit1 = 0xFF;
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m_seg1Digit2 = 0xFF;
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m_seg2Digit1 = 0xFF;
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m_seg2Digit2 = 0xFF;
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m_dataSent = 0;
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m_dataReceived = 0;
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m_adcPortRead = 0;
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m_adcPortBit = 0;
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m_port42Out = 0;
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m_port46Out = 0;
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m_prev42Out = 0;
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m_prev46Out = 0;
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m_initState = 0;
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m_boardMode = 0;
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m_readMode = 0;
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m_wheelCenter = 0x80;
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m_uncenterVal1 = 0;
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m_uncenterVal2 = 0;
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m_lastConstForce = 0;
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m_lastSelfCenter = 0;
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m_lastFriction = 0;
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m_lastVibrate = 0;
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if (!m_simulated)
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m_z80.Reset();
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}
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UINT8 CDriveBoard::Read(void)
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{
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// TODO - simulate initialization sequence even when emulating to get rid of long pause at boot up (drive board can
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// carry on booting whilst game starts)
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if (m_simulated)
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return SimulateRead();
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else
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return m_dataReceived;
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}
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void CDriveBoard::Write(UINT8 data)
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{
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if (data >= 0x01 && data <= 0x0F ||
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data >= 0x20 && data <= 0x2F ||
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data >= 0x30 && data <= 0x3F ||
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data >= 0x40 && data <= 0x4F ||
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data >= 0x70 && data <= 0x7F)
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printf("DriveBoard.Write(%02X)\n", data);
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if (m_simulated)
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SimulateWrite(data);
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else
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{
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m_dataSent = data;
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if (data == 0xCB)
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m_initialized = false;
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}
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}
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UINT8 CDriveBoard::SimulateRead(void)
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{
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if (m_initialized)
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{
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switch (m_readMode)
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{
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case 0x0: return m_statusFlags; // Status flags
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case 0x1: return m_dip1; // DIP switch 1 value
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case 0x2: return m_dip2; // DIP switch 2 value
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case 0x3: return m_wheelCenter; // Wheel center
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case 0x4: return 0x80; // Cockpit banking center
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case 0x5: return m_inputs->steering->value; // Wheel position
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case 0x6: return 0x80; // Cockpit banking position
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case 0x7: return m_echoVal; // Init status/echo test
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default: return 0xFF;
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}
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}
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else
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{
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switch (m_initState / 5)
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{
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case 0: return 0xCF; // Initiate start
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case 1: return 0xCE;
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case 2: return 0xCD;
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case 3: return 0xCC; // Centering wheel
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default:
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m_initialized = true;
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return 0x80;
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}
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}
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}
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void CDriveBoard::SimulateWrite(UINT8 cmd)
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{
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// Following are commands for Scud Race. Daytona 2 has a compatible command set while Sega Rally 2 is completely different
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// TODO - finish for Scud Race and Daytona 2
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// TODO - implement for Sega Rally 2
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UINT8 type = cmd>>4;
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UINT8 val = cmd&0xF;
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switch (type)
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{
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case 0: // 0x00-0F Play sequence
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/* TODO */
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break;
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case 1: // 0x10-1F Set centering strength
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if (val == 0)
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// Disable auto-centering
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// TODO - is 0x10 for disable?
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SendSelfCenter(0);
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else
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// Enable auto-centering (0x1 = weakest, 0xF = strongest)
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SendSelfCenter(val * 0x11);
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break;
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case 2: // 0x20-2F Friction strength
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if (val == 0)
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// Disable friction
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// TODO - is 0x20 for disable?
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SendFriction(0);
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else
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// Enable friction (0x1 = weakest, 0xF = strongest)
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SendFriction(val * 0x11);
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break;
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case 3: // 0x30-3F Uncentering (vibrate)
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if (val == 0)
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// Disable uncentering
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SendVibrate(0);
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else
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// Enable uncentering (0x1 = weakest, 0xF = strongest)
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SendVibrate(val * 0x11);
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break;
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case 4: // 0x40-4F Play power-slide sequence
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/* TODO */
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break;
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case 5: // 0x50-5F Rotate wheel right
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SendConstantForce((val + 1) * 0x5);
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break;
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case 6: // 0x60-6F Rotate wheel left
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SendConstantForce(-(val + 1) * 0x5);
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break;
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case 7: // 0x70-7F Set steering parameters
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/* TODO */
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break;
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case 8: // 0x80-8F Test Mode
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switch (val&0x7)
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{
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case 0: SendStopAll(); break; // 0x80 Stop motor
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case 1: SendConstantForce(20); break; // 0x81 Roll wheel right
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case 2: SendConstantForce(-20); break; // 0x82 Roll wheel left
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case 3: /* Ignore - no clutch */ break; // 0x83 Clutch on
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case 4: /* Ignore - no clutch */ break; // 0x84 Clutch off
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case 5: m_wheelCenter = m_inputs->steering->value; break; // 0x85 Set wheel center position
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case 6: /* Ignore */ break; // 0x86 Set cockpit banking position
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case 7: /* Ignore */ break; // 0x87 Lamp on/off
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}
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case 0x9: // 0x90-9F ??? Don't appear to have any effect with Scud Race ROM
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/* TODO */
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break;
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case 0xA: // 0xA0-AF ??? Don't appear to have any effect with Scud Race ROM
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/* TODO */
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break;
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case 0xB: // 0xB0-BF Invalid command (reserved for use by PPC to send cabinet type 0xB0 or 0xB1 during initialization)
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/* Ignore */
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break;
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case 0xC: // 0xC0-CF Set board mode (0xCB = reset board)
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SendStopAll();
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if (val >= 0xB)
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{
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// Reset board
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m_initialized = false;
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m_initState = 0;
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}
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else
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m_boardMode = val;
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break;
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case 0xD: // 0xD0-DF Set read mode
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m_readMode = val&0x7;
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break;
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case 0xE: // 0xE0-EF Invalid command
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/* Ignore */
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break;
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case 0xF: // 0xF0-FF Echo test
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m_echoVal = val;
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break;
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}
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}
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void CDriveBoard::RunFrame(void)
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{
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if (m_simulated)
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SimulateFrame();
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else
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EmulateFrame();
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}
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void CDriveBoard::SimulateFrame(void)
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{
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if (!m_initialized)
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m_initState++;
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// TODO - update m_statusFlags and play preset scripts according to board mode
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}
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void CDriveBoard::EmulateFrame(void)
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{
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// Assuming Z80 runs @ 4.0MHz and NMI triggers @ 60.0KHz
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// TODO - find out if Z80 frequency is correct and exact frequency of NMI interrupts (just guesswork at the moment!)
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int cycles = 4.0 * 1000000 / 60;
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int loopCycles = 10000;
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while (cycles > 0)
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{
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if (m_allowInterrupts)
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m_z80.TriggerNMI();
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cycles -= m_z80.Run(min<int>(loopCycles, cycles));
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}
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}
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UINT8 CDriveBoard::Read8(UINT32 addr)
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{
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if (addr < 0x9000) // ROM is 0x0000-0x8FFF
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return m_rom[addr];
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else if (addr >= 0xE000) // RAM is 0xE000-0xFFFF
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return m_ram[addr-0xE000];
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else
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{
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printf("Unhandled Z80 read of %08X (at PC = %04X)\n", addr, m_z80.GetPC());
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return 0xFF;
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}
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}
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void CDriveBoard::Write8(UINT32 addr, UINT8 data)
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{
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if (addr >= 0xE000) // ROM is 0x0000-0x8FFF
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m_ram[addr-0xE000] = data;
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else
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printf("Unhandled Z80 write to %08X (at PC = %04X)\n", addr, m_z80.GetPC());
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}
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UINT8 CDriveBoard::IORead8(UINT32 portNum)
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{
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UINT8 adcVal;
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switch (portNum)
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{
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case 32: // DIP 1 value
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return m_dip1;
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case 33: // DIP 2 value
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return m_dip2;
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case 36: // ADC channel 1 - not connected
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case 37: // ADC channel 2 - steering wheel position (0x00 = full left, 0x80 = center, 0xFF = full right)
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case 38: // ADC channel 3 - cockpit bank position (deluxe cabinets) (0x00 = full left, 0x80 = center, 0xFF = full right)
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case 39: // ADC channel 4 - not connected
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if (portNum == m_adcPortRead && m_adcPortBit-- > 0)
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{
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switch (portNum)
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{
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case 36: // Not connected
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adcVal = 0x00;
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break;
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case 37: // Steering wheel for twin racing cabinets - TODO - check actual range of steering, suspect it is not really 0x00-0xFF
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if (m_initialized)
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adcVal = (UINT8)m_inputs->steering->value;
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else
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adcVal = 0x80; // If not initialized, return 0x80 so that wheel centering test does not fail
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break;
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case 38: // Cockpit bank position for deluxe racing cabinets
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adcVal = 0x80;
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break;
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case 39: // Not connected
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adcVal = 0x00;
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break;
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default:
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printf("Unhandled Z80 input on ADC port %u (at PC = %04X)\n", portNum, m_z80.GetPC());
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return 0xFF;
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}
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return (adcVal>>m_adcPortBit)&0x01;
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}
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else
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{
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printf("Unhandled Z80 input on ADC port %u (at PC = %04X)\n", portNum, m_z80.GetPC());
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return 0xFF;
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}
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case 40: // PPC command
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return m_dataSent;
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case 44: // Encoder error reporting (kept at 0x00 for no error)
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// Bits 0 & 1 clear = no error
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// Bit 1 set =
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// Bit 2 set =
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// Bit 3 set =
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return 0x00;
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default:
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printf("Unhandled Z80 input on port %u (at PC = %04X)\n", portNum, m_z80.GetPC());
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return 0xFF;
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}
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}
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void CDriveBoard::IOWrite8(UINT32 portNum, UINT8 data)
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{
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switch (portNum)
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{
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case 16: // Unsure? - single byte 0x03 sent at initialization, then occasionally writes 0x07 & 0xFA to port
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return;
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case 17: // Interrupt control
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if (data == 0x57)
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m_allowInterrupts = true;
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else if (data == 0x53) // Strictly speaking 0x53 then 0x04
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m_allowInterrupts = false;
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return;
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case 28: // Unsure? - two bytes 0xFF, 0xFF sent at initialization only
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case 29: // Unsure? - two bytes 0x0F, 0x17 sent at initialization only
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case 30: // Unsure? - same as port 28
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case 31: // Unsure? - same as port 31
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return;
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case 32: // Left digit of 7-segment display 1
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m_seg1Digit1 = data;
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return;
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case 33: // Right digit of 7-segment display 1
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m_seg1Digit2 = data;
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return;
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case 34: // Left digit of 7-segment display 2
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m_seg2Digit1 = data;
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return;
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case 35: // Right digit of 7-segment display 2
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m_seg2Digit2 = data;
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return;
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case 36: // ADC channel 1 control
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case 37: // ADC channel 2 control
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case 38: // ADC channel 3 control
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case 39: // ADC channel 4 control
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m_adcPortRead = portNum;
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m_adcPortBit = 8;
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return;
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case 41: // Reply for PPC
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m_dataReceived = data;
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if (data == 0xCC)
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m_initialized = true;
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return;
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case 42: // Encoder motor data
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m_port42Out = data;
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ProcessEncoderCmd();
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return;
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case 45: // Clutch/lamp control (deluxe cabinets)
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return;
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case 46: // Encoder motor control
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m_port46Out = data;
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return;
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case 240: // Unsure? - single byte 0xBB sent at initialization only
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return;
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case 241: // Unsure? - single byte 0x4E sent regularly - some sort of watchdog?
|
|
return;
|
|
default:
|
|
printf("Unhandled Z80 output on port %u (at PC = %04X)\n", portNum, m_z80.GetPC());
|
|
return;
|
|
}
|
|
}
|
|
|
|
void CDriveBoard::ProcessEncoderCmd(void)
|
|
{
|
|
if (m_prev42Out != m_port42Out || m_prev46Out != m_port46Out)
|
|
{
|
|
printf("46 [%02X] / 42 [%02X]\n", m_port46Out, m_port42Out);
|
|
switch (m_port46Out)
|
|
{
|
|
case 0xFB:
|
|
// Friction? Sent during power slide
|
|
SendFriction(m_port42Out);
|
|
break;
|
|
|
|
case 0xFC:
|
|
// Centering / uncentering (vibrate)
|
|
// Bit 2 = on for centering, off for uncentering
|
|
if (m_port42Out&0x04)
|
|
{
|
|
// Centering
|
|
// Bit 7 = on for disable, off for enable
|
|
if (m_port42Out&0x80)
|
|
{
|
|
// Disable centering
|
|
SendSelfCenter(0);
|
|
}
|
|
else
|
|
{
|
|
// Bits 3-6 = centering strength 0x0-0xF. This is scaled to range 0x0F-0xFF
|
|
UINT8 strength = ((m_port42Out&0x78)>>3) * 0x10 + 0xF;
|
|
SendSelfCenter(strength);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// Uncentering
|
|
// Bits 0-1 = data sequence number 0-3
|
|
UINT8 seqNum = m_port42Out&0x03;
|
|
// Bits 4-7 = data values
|
|
UINT16 data = (m_port42Out&0xF0)>>4;
|
|
switch (seqNum)
|
|
{
|
|
case 0: m_uncenterVal1 = data<<4; break;
|
|
case 1: m_uncenterVal1 |= data; break;
|
|
case 2: m_uncenterVal2 = data<<4; break;
|
|
case 3: m_uncenterVal2 |= data; break;
|
|
}
|
|
if (seqNum == 3)
|
|
{
|
|
if (m_uncenterVal1 == 0)
|
|
{
|
|
// Disable uncentering
|
|
SendVibrate(0);
|
|
}
|
|
else
|
|
{
|
|
// Uncentering - unsure exactly how values sent map to strength or whether they specify some other attributes of effect
|
|
// For now just attempting to map them to a sensible value in range 0x00-0xFF
|
|
UINT8 strength = ((m_uncenterVal1>>1) - 7) * 0x50 + ((m_uncenterVal2>>1) - 5) * 0x10 + 0xF;
|
|
SendVibrate(strength);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 0xFD:
|
|
// Unsure? Sent as velocity changes, similar to self-centering
|
|
break;
|
|
|
|
case 0xFE:
|
|
// Apply constant force to wheel
|
|
// Value is: 0x80 = stop motor, 0x80-0xC0 = roll wheel left, 0x40-0x80 = roll wheel right, scale to range -0xFF-0xFF
|
|
SendConstantForce((0x80 - m_port42Out) * 4);
|
|
break;
|
|
|
|
case 0xFF:
|
|
// Stop all effects
|
|
if (m_port42Out == 0)
|
|
SendStopAll();
|
|
break;
|
|
|
|
default:
|
|
printf("Unknown = 46 [%02X] / 42 [%02X]\n", m_port46Out, m_port42Out);
|
|
break;
|
|
}
|
|
|
|
m_prev42Out = m_port42Out;
|
|
m_prev46Out = m_port46Out;
|
|
}
|
|
}
|
|
|
|
void CDriveBoard::SendStopAll(void)
|
|
{
|
|
printf(">> Stop All Effects\n");
|
|
|
|
ForceFeedbackCmd ffCmd;
|
|
ffCmd.id = FFStop;
|
|
m_inputs->steering->SendForceFeedbackCmd(ffCmd);
|
|
}
|
|
|
|
void CDriveBoard::SendConstantForce(INT8 val)
|
|
{
|
|
if (val == m_lastConstForce)
|
|
return;
|
|
if (val >= 0)
|
|
printf(">> Constant Force Right %02X\n", val);
|
|
else
|
|
printf(">> Constant Force Left %02X\n", -val);
|
|
|
|
ForceFeedbackCmd ffCmd;
|
|
ffCmd.id = FFConstantForce;
|
|
ffCmd.force = (float)val / (val >= 0 ? 127.0f : 128.0f);
|
|
m_inputs->steering->SendForceFeedbackCmd(ffCmd);
|
|
|
|
m_lastConstForce = val;
|
|
}
|
|
|
|
void CDriveBoard::SendSelfCenter(UINT8 val)
|
|
{
|
|
if (val == m_lastSelfCenter)
|
|
return;
|
|
printf(">> Self center %02X\n", val);
|
|
|
|
ForceFeedbackCmd ffCmd;
|
|
ffCmd.id = FFSelfCenter;
|
|
ffCmd.force = (float)val / 255.0f;
|
|
m_inputs->steering->SendForceFeedbackCmd(ffCmd);
|
|
|
|
m_lastSelfCenter = val;
|
|
}
|
|
|
|
void CDriveBoard::SendFriction(UINT8 val)
|
|
{
|
|
if (val == m_lastFriction)
|
|
return;
|
|
printf(">> Friction %02X\n", val);
|
|
|
|
ForceFeedbackCmd ffCmd;
|
|
ffCmd.id = FFFriction;
|
|
ffCmd.force = (float)val / 255.0f;
|
|
m_inputs->steering->SendForceFeedbackCmd(ffCmd);
|
|
|
|
m_lastFriction = val;
|
|
}
|
|
|
|
void CDriveBoard::SendVibrate(UINT8 val)
|
|
{
|
|
if (val == m_lastVibrate)
|
|
return;
|
|
printf(">> Vibrate %02X\n", val);
|
|
|
|
ForceFeedbackCmd ffCmd;
|
|
ffCmd.id = FFVibrate;
|
|
ffCmd.force = (float)val / 255.0f;
|
|
m_inputs->steering->SendForceFeedbackCmd(ffCmd);
|
|
|
|
m_lastVibrate = val;
|
|
}
|
|
|
|
CDriveBoard::CDriveBoard() : m_attached(false), m_simulated(false), m_rom(NULL), m_ram(NULL), m_inputs(NULL), m_dip1(0xCF), m_dip2(0xFF)
|
|
{
|
|
DebugLog("Built Drive Board\n");
|
|
}
|
|
|
|
CDriveBoard::~CDriveBoard(void)
|
|
{
|
|
if (m_ram != NULL)
|
|
{
|
|
delete[] m_ram;
|
|
m_ram = NULL;
|
|
}
|
|
m_rom = NULL;
|
|
m_inputs = NULL;
|
|
|
|
DebugLog("Destroyed Drive Board\n");
|
|
}
|