71 lines
1.8 KiB
C++
71 lines
1.8 KiB
C++
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//---------------------------------------------------------------------------
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// NEOPOP : Emulator as in Dreamland
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//
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// Copyright (c) 2001-2002 by neopop_uk
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//---------------------------------------------------------------------------
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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. See also the license.txt file for
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// additional informations.
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//---------------------------------------------------------------------------
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#include "neopop.h"
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#include <ctime>
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namespace MDFN_IEN_NGP
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{
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extern time_t frontend_time;
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static uint8 rtc_latch[7];
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static void update_rtc_latch(void)
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{
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uint8 low, high;
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//Get the system time
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const struct tm* localTime = gmtime(&frontend_time);
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low = localTime->tm_year - 100;
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high = low; //Years
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rtc_latch[0x00] = ((high / 10) << 4) | (low % 10);
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low = localTime->tm_mon + 1;
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high = low; //Months
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rtc_latch[0x01] = ((high / 10) << 4) | (low % 10);
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low = localTime->tm_mday;
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high = low; //Days
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rtc_latch[0x02] = ((high / 10) << 4) | (low % 10);
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low = localTime->tm_hour;
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high = low; //Hours
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rtc_latch[0x03] = ((high / 10) << 4) | (low % 10);
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low = localTime->tm_min;
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high = low; //Minutes
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rtc_latch[0x04] = ((high / 10) << 4) | (low % 10);
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low = localTime->tm_sec;
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high = low; //Seconds
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rtc_latch[0x05] = ((high / 10) << 4) | (low % 10);
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rtc_latch[0x06] = ((rtc_latch[0x00] % 4) << 4) | (localTime->tm_wday & 0x0F);
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}
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uint8 rtc_read8(uint32 address)
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{
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if (address >= 0x0091 && address <= 0x0097)
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{
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if (address == 0x0091)
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update_rtc_latch();
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return (rtc_latch[address - 0x0091]);
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}
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return (0);
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}
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}
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