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| /* | ||
| Copyright (C) 2023 DeSmuME team | ||
| This file is free software: you can redistribute it and/or modify | ||
| it under the terms of the GNU General Public License as published by | ||
| the Free Software Foundation, either version 2 of the License, or | ||
| (at your option) any later version. | ||
| This file is distributed in the hope that it will be useful, | ||
| but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| GNU General Public License for more details. | ||
| You should have received a copy of the GNU General Public License | ||
| along with the this software. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
|
|
||
| //Absolute barebones implementation of the Slide Controller add-on. Rumble is not implemented. | ||
| //The game does a bunch of mystery reads of various sizes which have not been investigated at all. | ||
|
|
||
| #include "../slot2.h" | ||
| #include "../emufile.h" | ||
|
|
||
| #define SC_BITIN(X, Y) \ | ||
| do { \ | ||
| X = (X << 1) | (Y & 1); \ | ||
| bitsWritten++; \ | ||
| } while (0) | ||
|
|
||
| #define SC_BITOUT(X, Y) \ | ||
| do { \ | ||
| X = ((Y >> 7 - bitsRead) & 1); \ | ||
| bitsRead++; \ | ||
| } while(0) | ||
|
|
||
| u8 motionStatus; | ||
| u8 xMotion; | ||
| u8 yMotion; | ||
|
|
||
| class Slot2_SlideController : public ISlot2Interface | ||
| { | ||
| private: | ||
| u8 prevClock; | ||
| u8 bitsWritten; | ||
| u8 bitsRead; | ||
| u8 inByte; | ||
| u16 regSel; | ||
|
|
||
| u8 configBits; | ||
| u8 framePeriodLower; | ||
| u8 framePeriodUpper; | ||
| public: | ||
|
|
||
| virtual Slot2Info const* info() | ||
| { | ||
| static Slot2InfoSimple info("Slide Controller", "Slide Controller add-on", 0x0A); | ||
| return &info; | ||
| } | ||
|
|
||
| virtual void connect() | ||
| { | ||
| prevClock = 0; | ||
| bitsWritten = 0; | ||
| bitsRead = 0; | ||
| inByte = 0; | ||
| regSel = 0xFFFF; | ||
|
|
||
| motionStatus = 0; | ||
| xMotion = 0; | ||
| yMotion = 0; | ||
| configBits = 0; | ||
| framePeriodLower = 0x20; | ||
| framePeriodUpper = 0xD1; | ||
| } | ||
|
|
||
| virtual void writeWord(u8 PROCNUM, u32 addr, u16 val) | ||
| { | ||
| if (addr == 0x081E0000) | ||
| { | ||
| if ((prevClock == 0) && (val & 0x2) && (val & 0x8)) | ||
| { | ||
| SC_BITIN(inByte, val); | ||
| if (bitsWritten == 8) | ||
| { | ||
| bitsWritten = 0; | ||
| if (regSel == 0xFFFF) //First byte written | ||
| { | ||
| regSel = inByte; | ||
| } | ||
| else //Second byte written | ||
| { | ||
| //printf("WRITE TO REG: %02X = %02X\n", regSel & 0x7F , inByte); | ||
| switch (regSel & 0x7F) | ||
| { | ||
| case 0x0A: //Config bits | ||
| configBits = inByte; | ||
| break; | ||
| case 0x10: //Frame period (lower) | ||
| framePeriodLower = inByte; | ||
| break; | ||
| case 0x11: //Frame period(upper) | ||
| framePeriodUpper = inByte; | ||
| break; | ||
| } | ||
| regSel = 0xFFFF; | ||
| } | ||
| } | ||
| } | ||
| prevClock = (val & 0x2) >> 1; | ||
| } | ||
|
|
||
| if (configBits & 0x80) //Reset | ||
| { | ||
| motionStatus = 0; | ||
| xMotion = 0; | ||
| yMotion = 0; | ||
| configBits = 0; | ||
| framePeriodLower = 0x20; | ||
| framePeriodUpper = 0xD1; | ||
|
|
||
| prevClock = 0; | ||
| bitsWritten = 0; | ||
| bitsRead = 0; | ||
| inByte = 0; | ||
| regSel = 0xFFFF; | ||
| } | ||
| } | ||
|
|
||
| virtual u8 readByte(u8 PROCNUM, u32 addr) | ||
| { | ||
| if (addr == 0x080000B2) | ||
| { | ||
| return 0x96; | ||
| } | ||
| return 0xFF; | ||
| } | ||
|
|
||
| virtual u16 readWord(u8 PROCNUM, u32 addr) | ||
| { | ||
| u16 outWord = 0; | ||
|
|
||
| if (addr < 0x08000100) | ||
| { | ||
| outWord = 0xFEF0; | ||
| } | ||
|
|
||
| if (addr == 0x081E0000) | ||
| { | ||
| switch (regSel) | ||
| { | ||
| case 0x00: //Product ID | ||
| SC_BITOUT(outWord, 0x3); | ||
| break; | ||
| case 0x01: //Revision ID | ||
| SC_BITOUT(outWord, 0x20); //Is this correct? | ||
| break; | ||
| case 0x02: //Motion status | ||
| SC_BITOUT(outWord, motionStatus); | ||
| if (bitsRead == 8) motionStatus = 0; | ||
| break; | ||
| case 0x03: //X motion delta | ||
| SC_BITOUT(outWord, xMotion); | ||
| if (bitsRead == 8) xMotion = 0; | ||
| break; | ||
| case 0x04: //Y motion delta | ||
| SC_BITOUT(outWord, yMotion); | ||
| if (bitsRead == 8) yMotion = 0; | ||
| break; | ||
| case 0x05: //Surface quality | ||
| SC_BITOUT(outWord, 128); | ||
| break; | ||
| case 0x06: //Average pixel | ||
| SC_BITOUT(outWord, 32); | ||
| break; | ||
| case 0x07: //Maximum pixel | ||
| SC_BITOUT(outWord, 63); | ||
| break; | ||
| case 0x0A: //Configuration bits | ||
| SC_BITOUT(outWord, configBits); | ||
| break; | ||
| case 0x0C: //Data out (lower) | ||
| SC_BITOUT(outWord, 0); | ||
| break; | ||
| case 0x0D: //Data out (upper) | ||
| SC_BITOUT(outWord, 0); | ||
| break; | ||
| case 0x0E: //Shutter value (lower) | ||
| SC_BITOUT(outWord, 64); | ||
| break; | ||
| case 0x0F: //Shutter value (upper) | ||
| SC_BITOUT(outWord, 0); | ||
| break; | ||
| case 0x10: //Frame period (lower) | ||
| SC_BITOUT(outWord, framePeriodLower); | ||
| break; | ||
| case 0x11: //Frame period (upper) | ||
| SC_BITOUT(outWord, framePeriodUpper); | ||
| break; | ||
| } | ||
|
|
||
| if (bitsRead == 8) | ||
| { | ||
| bitsRead = 0; | ||
| //printf("READ FROM REG: %02X\n", regSel); | ||
| regSel = 0xFFFF; | ||
| } | ||
| } | ||
|
|
||
| return outWord; | ||
| } | ||
|
|
||
| virtual void savestate(EMUFILE& os) | ||
| { | ||
| s32 version = 0; | ||
| os.write_32LE(version); | ||
|
|
||
| os.write_u8(prevClock); | ||
| os.write_u8(bitsWritten); | ||
| os.write_u8(bitsRead); | ||
| os.write_u8(inByte); | ||
| os.write_16LE(regSel); | ||
|
|
||
| os.write_u8(configBits); | ||
| os.write_u8(framePeriodLower); | ||
| os.write_u8(framePeriodUpper); | ||
| os.write_u8(motionStatus); | ||
| os.write_u8(xMotion); | ||
| os.write_u8(yMotion); | ||
| } | ||
|
|
||
| virtual void loadstate(EMUFILE& is) | ||
| { | ||
| s32 version = is.read_s32LE(); | ||
|
|
||
| if (version == 0) | ||
| { | ||
| is.read_u8(prevClock); | ||
| is.read_u8(bitsWritten); | ||
| is.read_u8(bitsRead); | ||
| is.read_u8(inByte); | ||
| is.read_16LE(regSel); | ||
|
|
||
| is.read_u8(configBits); | ||
| is.read_u8(framePeriodLower); | ||
| is.read_u8(framePeriodUpper); | ||
| is.read_u8(motionStatus); | ||
| is.read_u8(xMotion); | ||
| is.read_u8(yMotion); | ||
| } | ||
| } | ||
| }; | ||
|
|
||
| ISlot2Interface* construct_Slot2_SlideController() { return new Slot2_SlideController(); } | ||
|
|
||
| void slideController_updateMotion(s8 x, s8 y) | ||
| { | ||
| xMotion = (u8)x; | ||
| yMotion = (u8)y; | ||
| if (xMotion || yMotion) | ||
| motionStatus = 0x80; | ||
| } | ||
|
|
||
| #undef SC_BITIN | ||
| #undef SC_BITOUT |
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