mirror of
https://github.com/zydeco/minivmac4ios.git
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1 line
11 KiB
C
Executable File
1 line
11 KiB
C
Executable File
/*
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RTCEMDEV.c
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Copyright (C) 2003 Philip Cummins, Paul C. Pratt
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You can redistribute this file and/or modify it under the terms
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of version 2 of the GNU General Public License as published by
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the Free Software Foundation. You should have received a copy
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of the license along with this file; see the file COPYING.
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This file 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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license for more details.
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*/
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/*
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Real Time Clock EMulated DEVice
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Emulates the RTC found in the Mac Plus.
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This code adapted from "RTC.c" in vMac by Philip Cummins.
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*/
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#ifndef AllFiles
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#include "SYSDEPNS.h"
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#include "MYOSGLUE.h"
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#include "ENDIANAC.h"
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#include "EMCONFIG.h"
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#include "GLOBGLUE.h"
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#endif
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/* define _RTC_Debug */
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#ifdef _RTC_Debug
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#include <stdio.h>
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#endif
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#include "RTCEMDEV.h"
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#define HaveXPRAM (CurEmMd >= kEmMd_Plus)
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/*
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ReportAbnormalID unused 0x0805 - 0x08FF
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*/
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#if HaveXPRAM
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#define PARAMRAMSize 256
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#else
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#define PARAMRAMSize 20
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#endif
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#if HaveXPRAM
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#define Group1Base 0x10
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#define Group2Base 0x08
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#else
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#define Group1Base 0x00
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#define Group2Base 0x10
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#endif
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typedef struct
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{
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/* RTC VIA Flags */
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ui3b WrProtect;
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ui3b DataOut;
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ui3b DataNextOut;
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/* RTC Data */
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ui3b ShiftData;
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ui3b Counter;
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ui3b Mode;
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ui3b SavedCmd;
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#if HaveXPRAM
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ui3b Sector;
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#endif
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/* RTC Registers */
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ui3b Seconds_1[4];
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ui3b PARAMRAM[PARAMRAMSize];
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} RTC_Ty;
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LOCALVAR RTC_Ty RTC;
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/* RTC Functions */
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LOCALVAR ui5b LastRealDate;
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#ifndef RTCinitPRAM
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#define RTCinitPRAM 1
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#endif
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#ifndef TrackSpeed /* in 0..4 */
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#define TrackSpeed 0
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#endif
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#ifndef AlarmOn /* in 0..1 */
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#define AlarmOn 0
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#endif
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#ifndef DiskCacheSz /* in 1,2,3,4,6,8,12 */
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/* actual cache size is DiskCacheSz * 32k */
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#if (CurEmMd == kEmMd_II) || (CurEmMd == kEmMd_IIx)
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#define DiskCacheSz 1
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#else
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#define DiskCacheSz 4
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#endif
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#endif
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#ifndef StartUpDisk /* in 0..1 */
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#define StartUpDisk 0
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#endif
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#ifndef DiskCacheOn /* in 0..1 */
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#define DiskCacheOn 0
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#endif
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#ifndef MouseScalingOn /* in 0..1 */
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#define MouseScalingOn 0
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#endif
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#define prb_fontHi 0
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#define prb_fontLo 2
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#define prb_kbdPrintHi (AutoKeyRate + (AutoKeyThresh << 4))
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#define prb_kbdPrintLo 0
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#define prb_volClickHi (SpeakerVol + (TrackSpeed << 3) + (AlarmOn << 7))
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#define prb_volClickLo (CaretBlinkTime + (DoubleClickTime << 4))
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#define prb_miscHi DiskCacheSz
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#define prb_miscLo \
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((MenuBlink << 2) + (StartUpDisk << 4) \
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+ (DiskCacheOn << 5) + (MouseScalingOn << 6))
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#if dbglog_HAVE && 0
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EXPORTPROC DumpRTC(void);
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GLOBALPROC DumpRTC(void)
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{
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int Counter;
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dbglog_writeln("RTC Parameter RAM");
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for (Counter = 0; Counter < PARAMRAMSize; Counter++) {
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dbglog_writeNum(Counter);
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dbglog_writeCStr(", ");
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dbglog_writeHex(RTC.PARAMRAM[Counter]);
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dbglog_writeReturn();
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}
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}
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#endif
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GLOBALFUNC blnr RTC_Init(void)
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{
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int Counter;
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ui5b secs;
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RTC.Mode = RTC.ShiftData = RTC.Counter = 0;
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RTC.DataOut = RTC.DataNextOut = 0;
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RTC.WrProtect = falseblnr;
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secs = CurMacDateInSeconds;
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LastRealDate = secs;
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RTC.Seconds_1[0] = secs & 0xFF;
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RTC.Seconds_1[1] = (secs & 0xFF00) >> 8;
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RTC.Seconds_1[2] = (secs & 0xFF0000) >> 16;
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RTC.Seconds_1[3] = (secs & 0xFF000000) >> 24;
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for (Counter = 0; Counter < PARAMRAMSize; Counter++) {
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RTC.PARAMRAM[Counter] = 0;
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}
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#if RTCinitPRAM
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RTC.PARAMRAM[0 + Group1Base] = 168; /* valid */
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#if (CurEmMd == kEmMd_II) || (CurEmMd == kEmMd_IIx)
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RTC.PARAMRAM[2 + Group1Base] = 1;
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/* node id hint for printer port (AppleTalk) */
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#endif
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RTC.PARAMRAM[3 + Group1Base] = 34;
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/*
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serial ports config bits: 4-7 A, 0-3 B
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useFree 0 Use undefined
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useATalk 1 AppleTalk
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useAsync 2 Async
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useExtClk 3 externally clocked
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*/
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RTC.PARAMRAM[4 + Group1Base] = 204; /* portA, high */
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RTC.PARAMRAM[5 + Group1Base] = 10; /* portA, low */
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RTC.PARAMRAM[6 + Group1Base] = 204; /* portB, high */
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RTC.PARAMRAM[7 + Group1Base] = 10; /* portB, low */
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RTC.PARAMRAM[13 + Group1Base] = prb_fontLo;
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RTC.PARAMRAM[14 + Group1Base] = prb_kbdPrintHi;
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#if (CurEmMd == kEmMd_II) || (CurEmMd == kEmMd_IIx)
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RTC.PARAMRAM[15 + Group1Base] = 1;
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/*
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printer, if any, connected to modem port
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because printer port used for appletalk.
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*/
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#endif
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#if prb_volClickHi != 0
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RTC.PARAMRAM[0 + Group2Base] = prb_volClickHi;
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#endif
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RTC.PARAMRAM[1 + Group2Base] = prb_volClickLo;
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RTC.PARAMRAM[2 + Group2Base] = prb_miscHi;
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RTC.PARAMRAM[3 + Group2Base] = prb_miscLo
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#if 0 != vMacScreenDepth
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| 0x80
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#endif
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;
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#if HaveXPRAM /* extended parameter ram initialized */
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#if (CurEmMd == kEmMd_II) || (CurEmMd == kEmMd_IIx)
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RTC.PARAMRAM[12] = 0x4e;
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RTC.PARAMRAM[13] = 0x75;
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RTC.PARAMRAM[14] = 0x4d;
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RTC.PARAMRAM[15] = 0x63;
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#else
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RTC.PARAMRAM[12] = 0x42;
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RTC.PARAMRAM[13] = 0x75;
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RTC.PARAMRAM[14] = 0x67;
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RTC.PARAMRAM[15] = 0x73;
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#endif
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#endif
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#if ((CurEmMd >= kEmMd_SE) && (CurEmMd <= kEmMd_Classic)) \
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|| (CurEmMd == kEmMd_II) || (CurEmMd == kEmMd_IIx)
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RTC.PARAMRAM[0x01] = 0x80;
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RTC.PARAMRAM[0x02] = 0x4F;
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#endif
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#if (CurEmMd == kEmMd_II) || (CurEmMd == kEmMd_IIx)
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RTC.PARAMRAM[0x03] = 0x48;
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/* video board id */
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RTC.PARAMRAM[0x46] = /* 0x42 */ 0x76; /* 'v' */
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RTC.PARAMRAM[0x47] = /* 0x32 */ 0x4D; /* 'M' */
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/* mode */
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#if (0 == vMacScreenDepth) || (vMacScreenDepth >= 4)
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RTC.PARAMRAM[0x48] = 0x80;
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#else
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RTC.PARAMRAM[0x48] = 0x81;
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/* 0x81 doesn't quite work right at boot */
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/* no, it seems to work now (?) */
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/* but only if depth <= 3 */
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#endif
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#endif
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#if (CurEmMd == kEmMd_II) || (CurEmMd == kEmMd_IIx)
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RTC.PARAMRAM[0x77] = 0x01;
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#endif
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#if ((CurEmMd >= kEmMd_SE) && (CurEmMd <= kEmMd_Classic)) \
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|| (CurEmMd == kEmMd_II) || (CurEmMd == kEmMd_IIx)
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/* start up disk (encoded how?) */
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RTC.PARAMRAM[0x78] = 0x00;
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RTC.PARAMRAM[0x79] = 0x01;
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RTC.PARAMRAM[0x7A] = 0xFF;
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RTC.PARAMRAM[0x7B] = 0xFE;
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#endif
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#if (CurEmMd == kEmMd_II) || (CurEmMd == kEmMd_IIx)
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RTC.PARAMRAM[0x80] = 0x09;
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RTC.PARAMRAM[0x81] = 0x80;
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#endif
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#if HaveXPRAM /* extended parameter ram initialized */
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do_put_mem_long(&RTC.PARAMRAM[0xE4], CurMacLatitude);
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do_put_mem_long(&RTC.PARAMRAM[0xE8], CurMacLongitude);
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do_put_mem_long(&RTC.PARAMRAM[0xEC], CurMacDelta);
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#endif
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#endif /* RTCinitPRAM */
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return trueblnr;
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}
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#ifdef RTC_OneSecond_PulseNtfy
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IMPORTPROC RTC_OneSecond_PulseNtfy(void);
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#endif
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GLOBALPROC RTC_Interrupt(void)
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{
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ui5b Seconds = 0;
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ui5b NewRealDate = CurMacDateInSeconds;
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ui5b DateDelta = NewRealDate - LastRealDate;
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if (DateDelta != 0) {
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Seconds = (RTC.Seconds_1[3] << 24) + (RTC.Seconds_1[2] << 16)
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+ (RTC.Seconds_1[1] << 8) + RTC.Seconds_1[0];
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Seconds += DateDelta;
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RTC.Seconds_1[0] = Seconds & 0xFF;
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RTC.Seconds_1[1] = (Seconds & 0xFF00) >> 8;
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RTC.Seconds_1[2] = (Seconds & 0xFF0000) >> 16;
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RTC.Seconds_1[3] = (Seconds & 0xFF000000) >> 24;
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LastRealDate = NewRealDate;
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#ifdef RTC_OneSecond_PulseNtfy
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RTC_OneSecond_PulseNtfy();
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#endif
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}
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}
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LOCALFUNC ui3b RTC_Access_PRAM_Reg(ui3b Data, blnr WriteReg, ui3b t)
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{
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if (WriteReg) {
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if (! RTC.WrProtect) {
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RTC.PARAMRAM[t] = Data;
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#ifdef _RTC_Debug
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printf("Writing Address %2x, Data %2x\n", t, Data);
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#endif
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}
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} else {
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Data = RTC.PARAMRAM[t];
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}
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return Data;
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}
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LOCALFUNC ui3b RTC_Access_Reg(ui3b Data, blnr WriteReg, ui3b TheCmd)
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{
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ui3b t = (TheCmd & 0x7C) >> 2;
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if (t < 8) {
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if (WriteReg) {
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if (! RTC.WrProtect) {
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RTC.Seconds_1[t & 0x03] = Data;
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}
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} else {
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Data = RTC.Seconds_1[t & 0x03];
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}
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} else if (t < 12) {
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Data = RTC_Access_PRAM_Reg(Data, WriteReg,
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(t & 0x03) + Group2Base);
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} else if (t < 16) {
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if (WriteReg) {
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switch (t) {
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case 12 :
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break; /* Test Write, do nothing */
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case 13 :
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RTC.WrProtect = (Data & 0x80) != 0;
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break; /* Write_Protect Register */
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default :
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ReportAbnormalID(0x0801, "Write RTC Reg unknown");
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break;
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}
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} else {
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ReportAbnormalID(0x0802, "Read RTC Reg unknown");
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}
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} else {
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Data = RTC_Access_PRAM_Reg(Data, WriteReg,
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(t & 0x0F) + Group1Base);
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}
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return Data;
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}
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LOCALPROC RTC_DoCmd(void)
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{
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switch (RTC.Mode) {
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case 0: /* This Byte is a RTC Command */
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#if HaveXPRAM
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if ((RTC.ShiftData & 0x78) == 0x38) { /* Extended Command */
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RTC.SavedCmd = RTC.ShiftData;
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RTC.Mode = 2;
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#ifdef _RTC_Debug
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printf("Extended command %2x\n", RTC.ShiftData);
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#endif
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} else
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#endif
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{
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if ((RTC.ShiftData & 0x80) != 0x00) { /* Read Command */
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RTC.ShiftData =
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RTC_Access_Reg(0, falseblnr, RTC.ShiftData);
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RTC.DataNextOut = 1;
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} else { /* Write Command */
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RTC.SavedCmd = RTC.ShiftData;
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RTC.Mode = 1;
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}
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}
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break;
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case 1: /* This Byte is data for RTC Write */
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(void) RTC_Access_Reg(RTC.ShiftData,
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trueblnr, RTC.SavedCmd);
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RTC.Mode = 0;
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break;
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#if HaveXPRAM
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case 2: /* This Byte is rest of Extended RTC command address */
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#ifdef _RTC_Debug
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printf("Mode 2 %2x\n", RTC.ShiftData);
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#endif
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RTC.Sector = ((RTC.SavedCmd & 0x07) << 5)
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| ((RTC.ShiftData & 0x7C) >> 2);
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if ((RTC.SavedCmd & 0x80) != 0x00) { /* Read Command */
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RTC.ShiftData = RTC.PARAMRAM[RTC.Sector];
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RTC.DataNextOut = 1;
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RTC.Mode = 0;
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#ifdef _RTC_Debug
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printf("Reading X Address %2x, Data %2x\n",
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RTC.Sector, RTC.ShiftData);
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#endif
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} else {
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RTC.Mode = 3;
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#ifdef _RTC_Debug
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printf("Writing X Address %2x\n", RTC.Sector);
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#endif
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}
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break;
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case 3: /* This Byte is data for an Extended RTC Write */
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(void) RTC_Access_PRAM_Reg(RTC.ShiftData,
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trueblnr, RTC.Sector);
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RTC.Mode = 0;
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break;
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#endif
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}
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}
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GLOBALPROC RTCunEnabled_ChangeNtfy(void)
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{
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if (RTCunEnabled) {
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/* abort anything going on */
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if (RTC.Counter != 0) {
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#ifdef _RTC_Debug
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printf("aborting, %2x\n", RTC.Counter);
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#endif
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ReportAbnormalID(0x0803, "RTC aborting");
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}
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RTC.Mode = 0;
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RTC.DataOut = 0;
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RTC.DataNextOut = 0;
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RTC.ShiftData = 0;
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RTC.Counter = 0;
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}
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}
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GLOBALPROC RTCclock_ChangeNtfy(void)
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{
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if (! RTCunEnabled) {
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if (RTCclock) {
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RTC.DataOut = RTC.DataNextOut;
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RTC.Counter = (RTC.Counter - 1) & 0x07;
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if (RTC.DataOut) {
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RTCdataLine = ((RTC.ShiftData >> RTC.Counter) & 0x01);
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/*
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should notify VIA if changed, so can check
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data direction
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*/
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if (RTC.Counter == 0) {
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RTC.DataNextOut = 0;
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}
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} else {
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RTC.ShiftData = (RTC.ShiftData << 1) | RTCdataLine;
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if (RTC.Counter == 0) {
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RTC_DoCmd();
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}
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}
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}
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}
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}
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GLOBALPROC RTCdataLine_ChangeNtfy(void)
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{
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#if dbglog_HAVE
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if (RTC.DataOut) {
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if (! RTC.DataNextOut) {
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/*
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ignore. The ROM doesn't read from the RTC the
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way described in the Hardware Reference.
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It reads the data after setting the clock to
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one instead of before, and then immediately
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changes the VIA direction. So the RTC
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has no way of knowing to stop driving the
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data line, which certainly can't really be
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correct.
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*/
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} else {
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ReportAbnormalID(0x0804,
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"write RTC Data unexpected direction");
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}
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}
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#endif
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}
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