269 lines
8.0 KiB
C++
269 lines
8.0 KiB
C++
/*
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AppleWin : An Apple //e emulator for Windows
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Copyright (C) 1994-1996, Michael O'Brien
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Copyright (C) 1999-2001, Oliver Schmidt
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Copyright (C) 2002-2005, Tom Charlesworth
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Copyright (C) 2006-2023, Tom Charlesworth, 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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/*
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CopyProtectionDongles.cpp
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Emulate hardware copy protection dongles for Apple II
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Currently supported:
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- Southwestern Data Systems' datakey for SpeedStar Applesoft Compiler (Matthew D'Asaro Dec 2022)
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- Dynatech Microsoftware / Cortechs Corp's protection key for "CodeWriter"
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- Robocom Ltd's Interface Module for Robo Graphics 500/1000/1500 & RoboCAD 1/2 (BitStik joystick plugs in on top)
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*/
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#include "StdAfx.h"
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#include <sstream>
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#include "CopyProtectionDongles.h"
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#include "Memory.h"
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#include "YamlHelper.h"
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static DONGLETYPE copyProtectionDongleType = DT_EMPTY;
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static const BYTE codewriterInitialLFSR = 0x6B; // %1101011 (7-bit LFSR)
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static BYTE codewriterLFSR = codewriterInitialLFSR;
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static void CodeWriterResetLFSR()
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{
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codewriterLFSR = codewriterInitialLFSR;
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}
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static void CodeWriterClockLFSR()
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{
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BYTE bit = ((codewriterLFSR >> 1) ^ (codewriterLFSR >> 0)) & 1;
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codewriterLFSR = (codewriterLFSR >> 1) | (bit << 6);
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}
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void SetCopyProtectionDongleType(DONGLETYPE type)
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{
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copyProtectionDongleType = type;
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}
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DONGLETYPE GetCopyProtectionDongleType(void)
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{
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return copyProtectionDongleType;
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}
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void DongleControl(WORD address)
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{
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UINT AN = ((address - 8) >> 1) & 7;
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bool state = address & 1; // ie. C058 = AN0_off; C059 = AN0_on
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if (copyProtectionDongleType == DT_EMPTY || copyProtectionDongleType == DT_SDSSPEEDSTAR)
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return;
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if (copyProtectionDongleType == DT_CODEWRITER)
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{
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if ((AN == 3 && state == true) || MemGetAnnunciator(3)) // reset or was already reset? (ie. takes precedent over AN2)
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CodeWriterResetLFSR();
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else if (AN == 2 && state == false && MemGetAnnunciator(2) == true) // AN2 true->false edge?
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CodeWriterClockLFSR();
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}
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}
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// This protection dongle consists of a NAND gate connected with AN1 and AN2 on the inputs
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// PB2 on the output, and AN0 connected to power it.
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static bool SdsSpeedStar(void)
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{
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return !MemGetAnnunciator(0) || !(MemGetAnnunciator(1) && MemGetAnnunciator(2));
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}
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// Returns the copy protection dongle state of PB0. A return value of -1 means not used by copy protection dongle
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int CopyProtectionDonglePB0(void)
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{
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return -1;
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}
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// Returns the copy protection dongle state of PB1. A return value of -1 means not used by copy protection dongle
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int CopyProtectionDonglePB1(void)
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{
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return -1;
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}
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// Returns the copy protection dongle state of PB2. A return value of -1 means not used by copy protection dongle
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int CopyProtectionDonglePB2(void)
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{
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switch (copyProtectionDongleType)
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{
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case DT_SDSSPEEDSTAR:
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return SdsSpeedStar();
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case DT_CODEWRITER:
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return codewriterLFSR & 1;
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default:
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return -1;
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}
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}
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// Returns the copy protection dongle state of PDL(n). A return value of -1 means not used by copy protection dongle
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int CopyProtectionDonglePDL(UINT pdl)
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{
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if (copyProtectionDongleType != DT_ROBOCOM500 && copyProtectionDongleType != DT_ROBOCOM1000 && copyProtectionDongleType != DT_ROBOCOM1500)
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return -1;
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bool roboComInterfaceModulePower = !MemGetAnnunciator(3);
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if (!roboComInterfaceModulePower || pdl != 3)
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return -1;
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UINT roboComInterfaceModuleMode = ((UINT)MemGetAnnunciator(2) << 2) | ((UINT)MemGetAnnunciator(1) << 1) | (UINT)MemGetAnnunciator(0);
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switch (copyProtectionDongleType)
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{
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case DT_ROBOCOM500:
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{
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static BYTE robo500_lo[8] = { 0x3F,0x2E,0x54,0x54,0x2E,0x22,0x72,0x17 }; // PDL3 lower bound - see GH#1247
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static BYTE robo500_hi[8] = { 0x6F,0x54,0x94,0x94,0x54,0x40,0xC4,0x2E }; // PDL3 upper bound - see GH#1247
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// This mean value gives values that are very close to the actual 1000 & 1500 Module Interfaces - so assume it's similar for the 500 series.
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return (robo500_lo[roboComInterfaceModuleMode] + robo500_hi[roboComInterfaceModuleMode] - 1) / 2;
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}
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case DT_ROBOCOM1000:
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{
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static BYTE robo1000[8] = { 34,151,48,64,113,113,64,85 }; // Actual Module Interface values for PDL3
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return robo1000[roboComInterfaceModuleMode];
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}
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case DT_ROBOCOM1500:
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{
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static BYTE robo1500[8] = { 153,34,64,34,48,86,114,48 }; // Actual Module Interface values for PDL3
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return robo1500[roboComInterfaceModuleMode];
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}
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default:
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return -1;
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}
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}
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//===========================================================================
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#define SS_YAML_KEY_CODEWRITER_INDEX "LFSR"
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// Unit version history:
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// 1: Add SDS SpeedStar dongle
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// 2: Add Cortechs Corp CodeWriter protection key
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// Add Robocom Ltd - Robo 500/1000/1500 Interface Modules
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static const UINT kUNIT_VERSION = 2;
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static const std::string& GetSnapshotStructName_SDSSpeedStar(void)
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{
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static const std::string name("SDS SpeedStar dongle");
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return name;
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}
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static const std::string& GetSnapshotStructName_CodeWriter(void)
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{
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static const std::string name("Cortechs Corp - CodeWriter protection key");
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return name;
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}
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static const std::string& GetSnapshotStructName_Robocom500(void)
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{
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static const std::string name("Robocom Ltd - Robo 500 Interface Module");
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return name;
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}
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static const std::string& GetSnapshotStructName_Robocom1000(void)
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{
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static const std::string name("Robocom Ltd - Robo 1000 Interface Module");
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return name;
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}
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static const std::string& GetSnapshotStructName_Robocom1500(void)
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{
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static const std::string name("Robocom Ltd - Robo 1500 Interface Module");
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return name;
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}
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void CopyProtectionDongleSaveSnapshot(YamlSaveHelper& yamlSaveHelper)
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{
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if (copyProtectionDongleType == DT_SDSSPEEDSTAR)
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{
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yamlSaveHelper.SaveString(SS_YAML_KEY_DEVICE, GetSnapshotStructName_SDSSpeedStar());
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// NB. No state for this dongle
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}
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else if (copyProtectionDongleType == DT_CODEWRITER)
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{
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yamlSaveHelper.SaveString(SS_YAML_KEY_DEVICE, GetSnapshotStructName_CodeWriter());
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yamlSaveHelper.SaveHexUint8(SS_YAML_KEY_CODEWRITER_INDEX, codewriterLFSR);
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}
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else if (copyProtectionDongleType == DT_ROBOCOM500)
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{
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yamlSaveHelper.SaveString(SS_YAML_KEY_DEVICE, GetSnapshotStructName_Robocom500());
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// NB. No state for this dongle
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}
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else if (copyProtectionDongleType == DT_ROBOCOM1000)
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{
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yamlSaveHelper.SaveString(SS_YAML_KEY_DEVICE, GetSnapshotStructName_Robocom1000());
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// NB. No state for this dongle
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}
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else if (copyProtectionDongleType == DT_ROBOCOM1500)
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{
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yamlSaveHelper.SaveString(SS_YAML_KEY_DEVICE, GetSnapshotStructName_Robocom1500());
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// NB. No state for this dongle
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}
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else
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{
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_ASSERT(0);
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}
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}
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void CopyProtectionDongleLoadSnapshot(YamlLoadHelper& yamlLoadHelper, UINT version)
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{
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if (version < 1 || version > kUNIT_VERSION)
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{
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std::ostringstream msg;
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msg << "Version " << version;
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msg << " is not supported for game I/O device.";
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throw std::runtime_error(msg.str());
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}
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std::string device = yamlLoadHelper.LoadString(SS_YAML_KEY_DEVICE);
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if (device == GetSnapshotStructName_SDSSpeedStar())
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{
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copyProtectionDongleType = DT_SDSSPEEDSTAR;
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}
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else if (device == GetSnapshotStructName_CodeWriter())
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{
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copyProtectionDongleType = DT_CODEWRITER;
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codewriterLFSR = yamlLoadHelper.LoadUint(SS_YAML_KEY_CODEWRITER_INDEX);
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}
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else if (device == GetSnapshotStructName_Robocom500())
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{
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copyProtectionDongleType = DT_ROBOCOM500;
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}
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else if (device == GetSnapshotStructName_Robocom1000())
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{
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copyProtectionDongleType = DT_ROBOCOM1000;
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}
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else if (device == GetSnapshotStructName_Robocom1500())
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{
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copyProtectionDongleType = DT_ROBOCOM1500;
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}
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else
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{
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_ASSERT(0);
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}
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}
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