122 lines
3.2 KiB
C++
122 lines
3.2 KiB
C++
/*
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AppleWin : An Apple //e emulator for Windows
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Copyright (C) 2008, Michael Pohoreski
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AppleWin 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.
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AppleWin 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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You should have received a copy of the GNU General Public License
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along with AppleWin; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* Description: Generic No-Slot Clock
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*
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* Author: Michael Pohoreski
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*/
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#include "StdAfx.h"
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#pragma hdrstop
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#include "..\resource\resource.h"
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// #include "resource.h" // BUG -- wrong resource!!!
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#include <time.h>
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/*
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Old:
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File: PRODOS
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BLOAD PRODOS,TSYS,A$2000
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CALL-151
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2F76:60 5F 5E 5D 5C 5C 60
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File offset $0F76-$0F7C:
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ProDOS has a built-in clock driver that queries a clock/calendar card for the date and time.
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After the routine stores that information in the ProDOS Global Page ($BF90-$BF93),
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either ProDOS or your own application programs can use it. See Figure 6-1.
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Figure 6-1. ProDOS Date and Time Locations
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49041 ($BF91) 49040 ($BF90)
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7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
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+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+
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DATE: | year | month | day |
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+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+
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7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
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+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+
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TIME: | hour | | minute |
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+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+
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49043 ($BF93) 49042 ($BF92)
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ProDOS recognizes a clock card if the following bytes are present in
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the Cn00 ROM:
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$Cn00 = $08
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$Cn02 = $28
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$Cn04 = $58
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$Cn06 = $70
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The address is preceded by a $4C (JMP) if a clock card is recognized,
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or by a $60 (RTS) if not.
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The ProDOS clock driver uses the following addresses for its I/O to the
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clock:
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Cn08 - READ entry point
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Cn0B - WRITE entry point
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The accumulator is loaded with an #A3 before the JSR to the WRITE
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*/
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tm* Clock_Util_GetTime()
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{
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time_t tRawTime;
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time( &tRawTime );
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tm* pTime = localtime ( &tRawTime );
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if( pTime ) {
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mktime( pTime ); // get day of week: tm_wday
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}
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return pTime;
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}
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void Clock_Util_ConvertTimeToProdos( tm *pTime, unsigned char *pProDosBytes4_ )
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{
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if( pTime )
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{
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BYTE nMonth = pTime->tm_mon + 1;
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BYTE nDate1 = 0
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| ((pTime->tm_mday & 0x1F) << 0)
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| ((nMonth & 0x0F) << 5);
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BYTE nDate2 = 0
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| ((pTime->tm_year % 100) << 1)
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| (nMonth >> 3) & 1;
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BYTE nTime1 = (pTime->tm_min & 0x3F); // 60 = max(64) 0x3F
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BYTE nTime2 = (pTime->tm_hour & 0x1F); // 24 = max(32) 0x1F
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pProDosBytes4_[0] = nDate1;
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pProDosBytes4_[1] = nDate2;
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pProDosBytes4_[2] = nTime1;
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pProDosBytes4_[3] = nTime2;
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}
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}
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void Clock_Generic_UpdateProDos()
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{
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tm* pTime = Clock_Util_GetTime();
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Clock_Util_ConvertTimeToProdos( pTime, &mem[ 0xBF90 ] ); // ProDos date/time buffer
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}
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