mirror of
https://github.com/RetroDECK/Supermodel.git
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125 lines
3.2 KiB
C++
125 lines
3.2 KiB
C++
/**
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** Supermodel
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** A Sega Model 3 Arcade Emulator.
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** Copyright 2011 Bart Trzynadlowski, Nik Henson
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**
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** This file is part of Supermodel.
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**
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** Supermodel is free software: you can redistribute it and/or modify it under
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** the terms of the GNU General Public License as published by the Free
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** Software Foundation, either version 3 of the License, or (at your option)
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** any later version.
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**
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** Supermodel is distributed in the hope that it will be useful, but WITHOUT
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** ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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** FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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** more details.
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**
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** You should have received a copy of the GNU General Public License along
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** with Supermodel. If not, see <http://www.gnu.org/licenses/>.
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**/
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/*
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* RTC72421.cpp
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*
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* Epson RTC-72421 implementation.
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*
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* TO-DO List:
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* -----------
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* - Rather than returning the host system time, should compute the "virtual"
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* time inside the Model 3, which could differ.
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* - Writes do nothing yet.
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*/
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#include "RTC72421.h"
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#include <ctime>
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#include "Supermodel.h"
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/******************************************************************************
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Emulation Functions
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******************************************************************************/
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UINT8 CRTC72421::ReadRegister(unsigned reg)
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{
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static time_t oldTime{0};
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time_t currentTime;
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static struct tm *Time;
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time(¤tTime);
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if (currentTime != oldTime)
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{
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Time = localtime(¤tTime);
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oldTime = currentTime;
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}
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switch (reg&0xF)
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{
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case 0: // 1-second digit
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return (Time->tm_sec % 10) & 0xF;
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case 1: // 10-seconds digit
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return (Time->tm_sec / 10) & 0x7;
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case 2: // 1-minute digit
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return (Time->tm_min % 10) & 0xF;
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case 3: // 10-minute digit
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return (Time->tm_min / 10) & 0x7;
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case 4: // 1-hour digit
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return (Time->tm_hour % 10) & 0xF;
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case 5: // 10-hours digit
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return (Time->tm_hour / 10) & 0x7;
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case 6: // 1-day digit (days in month)
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return (Time->tm_mday % 10) & 0xF;
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case 7: // 10-days digit
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return (Time->tm_mday / 10) & 0x3;
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case 8: // 1-month digit
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return ((Time->tm_mon + 1) % 10) & 0xF;
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case 9: // 10-months digit
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return ((Time->tm_mon + 1) / 10) & 0x1;
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case 10: // 1-year digit
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return (Time->tm_year % 10) & 0xF;
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case 11: // 10-years digit
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return ((Time->tm_year % 100) / 10) & 0xF;
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case 12: // day of the week
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return Time->tm_wday & 0x7;
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case 13:
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break;
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case 14:
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break;
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case 15:
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break;
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}
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return 0;
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}
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void CRTC72421::WriteRegister(unsigned reg, UINT8 data)
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{
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// TO-DO: emulate me!
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}
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void CRTC72421::Reset(void)
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{
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// nothing to do
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}
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/******************************************************************************
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Initialization and Shutdown
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******************************************************************************/
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void CRTC72421::Init(void)
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{
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// this function really only exists for consistency with other device classes
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}
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CRTC72421::CRTC72421(void)
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{
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DebugLog("Built RTC-72421\n");
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}
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CRTC72421::~CRTC72421(void)
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{
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DebugLog("Destroyed RTC-72421\n");
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}
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