/* * Reinette II plus, a french Apple II emulator, using SDL2 * and powered by puce6502 - a MOS 6502 cpu emulator by the same author * Last modified 21st of June 2021 * Copyright (c) 2020 Arthur Ferreira * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include #include #include #include "puce6502.h" // memory layout #define RAMSIZE 0xC000 #define ROMSTART 0xD000 #define ROMSIZE 0x3000 uint8_t ram[RAMSIZE]; // 48K of ram in $000-$BFFF uint8_t rom[ROMSIZE]; // 12K of rom in $D000-$FFFF // language card #define LGCSTART 0xD000 #define LGCSIZE 0x3000 #define BK2START 0xD000 #define BK2SIZE 0x1000 uint8_t lgc[LGCSIZE]; // Language Card 12K in $D000-$FFFF uint8_t bk2[BK2SIZE]; // bank 2 of Language Card 4K in $D000-$DFFF // disk ][ prom #define SL6START 0xC600 #define SL6SIZE 0x0100 uint8_t sl6[SL6SIZE]; // P5A disk ][ prom in slot 6 //================================================================ SOFT SWITCHES uint8_t KBD = 0; // $C000, $C010 ascii value of keyboard input bool TEXT = true; // $C050 CLRTEXT / $C051 SETTEXT bool MIXED = false; // $C052 CLRMIXED / $C053 SETMIXED bool PAGE2 = false; // $C054 PAGE2 off / $C055 PAGE2 on bool HIRES = false; // $C056 GR / $C057 HGR bool LCWR = true; // Language Card writable bool LCRD = false; // Language Card readable bool LCBK2 = true; // Language Card bank 2 enabled bool LCWFF = false; // Language Card pre-write flip flop //====================================================================== PADDLES uint8_t PB0 = 0; // $C061 Push Button 0 (bit 7) / Open Apple uint8_t PB1 = 0; // $C062 Push Button 1 (bit 7) / Solid Apple uint8_t PB2 = 0; // $C063 Push Button 2 (bit 7) / shift mod !!! float GCP[2] = { 127.0f, 127.0f }; // GC Position ranging from 0 (left) to 255 right float GCC[2] = { 0.0f }; // $C064 (GC0) and $C065 (GC1) Countdowns int GCD[2] = { 0 }; // GC0 and GC1 Directions (left/down or right/up) int GCA[2] = { 0 }; // GC0 and GC1 Action (push or release) uint8_t GCActionSpeed = 8; // Game Controller speed at which it goes to the edges uint8_t GCReleaseSpeed = 8; // Game Controller speed at which it returns to center long long int GCCrigger; // $C070 the tick at which the GCs were reseted inline static void resetPaddles() { GCC[0] = GCP[0] * GCP[0]; // initialize the countdown for both paddles GCC[1] = GCP[1] * GCP[1]; // to the square of their actuall values (positions) GCCrigger = ticks; // records the time this was done } inline static uint8_t readPaddle(int pdl) { const float GCFreq = 6.6; // the speed at which the GC values decrease GCC[pdl] -= (ticks - GCCrigger) / GCFreq; // decreases the countdown if (GCC[pdl] <= 0) // timeout return GCC[pdl] = 0; // returns 0 return 0x80; // not timeout, return something with the MSB set } //====================================================================== SPEAKER #define audioBufferSize 4096 // found to be large enought Sint8 audioBuffer[2][audioBufferSize] = { 0 }; // see in main() for more details SDL_AudioDeviceID audioDevice; bool muted = false; // mute/unmute switch static void playSound() { static long long int lastTick = 0LL; static bool SPKR = false; // $C030 Speaker toggle if (!muted) { SPKR = !SPKR; // toggle speaker state Uint32 length = (int)((double)(ticks - lastTick) / 10.65625f); // 1023000Hz / 96000Hz = 10.65625 lastTick = ticks; if (length > audioBufferSize) length = audioBufferSize; SDL_QueueAudio(audioDevice, audioBuffer[SPKR], length | 1); // | 1 TO HEAR HIGH FREQ SOUNDS } } //====================================================================== DISK ][ int curDrv = 0; // Current Drive - only one can be enabled at a time struct drive { char filename[400]; // the full disk image pathname bool readOnly; // based on the image file attributes uint8_t data[232960]; // nibblelized disk image bool motorOn; // motor status bool writeMode; // writes to file are not implemented uint8_t track; // current track position uint16_t nibble; // ptr to nibble under head position } disk[2] = { 0 }; // two disk ][ drive units int insertFloppy(SDL_Window *wdo, char *filename, int drv) { FILE *f = fopen(filename, "rb"); // open file in read binary mode if (!f || fread(disk[drv].data, 1, 232960, f) != 232960) // load it into memory and check size return 0; fclose(f); sprintf(disk[drv].filename, "%s", filename); // update disk filename record f = fopen(filename, "ab"); // try to open the file in append binary mode if (f) { // success, file is writable disk[drv].readOnly = false; // update the readOnly flag fclose(f); // and close it untouched } else { disk[drv].readOnly = true; // f is NULL, no writable, no need to close it } char title[1000]; // UPDATE WINDOW TITLE int i, a, b; i = a = 0; while (disk[0].filename[i] != 0) // find start of filename for disk0 if (disk[0].filename[i++] == '\\') a = i; i = b = 0; while (disk[1].filename[i] != 0) // find start of filename for disk1 if (disk[1].filename[i++] == '\\') b = i; sprintf(title, "Reinette ][+ D1: %s D2: %s", disk[0].filename + a, disk[1].filename + b); SDL_SetWindowTitle(wdo, title); // updates window title return 1; } int saveFloppy(int drive) { if (!disk[drive].filename[0]) return 0; // no file loaded into drive if (disk[drive].readOnly) return 0; // file is read only write no aptempted FILE *f = fopen(disk[drive].filename, "wb"); if (!f) return 0; // could not open the file in write overide binary if (fwrite(disk[drive].data, 1, 232960, f) != 232960) { // failed to write the full file (disk full ?) fclose(f); // release the ressource return 0; } fclose(f); // success, release the ressource return 1; } void stepMotor(uint16_t address) { static bool phases[2][4] = { 0 }; // phases states (for both drives) static bool phasesB[2][4] = { 0 }; // phases states Before static bool phasesBB[2][4] = { 0 }; // phases states Before Before static int pIdx[2] = { 0 }; // phase index (for both drives) static int pIdxB[2] = { 0 }; // phase index Before static int halfTrackPos[2] = { 0 }; address &= 7; int phase = address >> 1; phasesBB[curDrv][pIdxB[curDrv]] = phasesB[curDrv][pIdxB[curDrv]]; phasesB[curDrv][pIdx[curDrv]] = phases[curDrv][pIdx[curDrv]]; pIdxB[curDrv] = pIdx[curDrv]; pIdx[curDrv] = phase; if (!(address & 1)) { // head not moving (PHASE x OFF) phases[curDrv][phase] = false; return; } if ((phasesBB[curDrv][(phase + 1) & 3]) && (--halfTrackPos[curDrv] < 0)) // head is moving in halfTrackPos[curDrv] = 0; if ((phasesBB[curDrv][(phase - 1) & 3]) && (++halfTrackPos[curDrv] > 140)) // head is moving out halfTrackPos[curDrv] = 140; phases[curDrv][phase] = true; // update track# disk[curDrv].track = (halfTrackPos[curDrv] + 1) / 2; } inline void setDrv(int drv) { disk[drv].motorOn = disk[!drv].motorOn || disk[drv].motorOn; // if any of the motors were ON disk[!drv].motorOn = false; // motor of the other drive is set to OFF curDrv = drv; // set the current drive } //========================================== MEMORY MAPPED SOFT SWITCHES HANDLER // this function is called from readMem and writeMem // it complements both functions when address is in page $C0 uint8_t softSwitches(uint16_t address, uint8_t value, bool WRT) { static uint8_t dLatch = 0; // disk ][ I/O register switch (address) { case 0xC000: return KBD; // KEYBOARD case 0xC010: KBD &= 0x7F; return KBD; // KBDSTROBE case 0xC020: // TAPEOUT (shall we listen it ? - try SAVE from applesoft) case 0xC030: // SPEAKER case 0xC033: playSound(); break; // apple invader uses $C033 to output sound ! case 0xC050: TEXT = false; break; // Graphics case 0xC051: TEXT = true; break; // Text case 0xC052: MIXED = false; break; // Mixed off case 0xC053: MIXED = true; break; // Mixed on case 0xC054: PAGE2 = false; break; // PAGE2 off case 0xC055: PAGE2 = true; break; // PAGE2 on case 0xC056: HIRES = false; break; // HiRes off case 0xC057: HIRES = true; break; // HiRes on case 0xC061: return PB0; // Push Button 0 case 0xC062: return PB1; // Push Button 1 case 0xC063: return PB2; // Push Button 2 case 0xC064: return readPaddle(0); // Paddle 0 case 0xC065: return readPaddle(1); // Paddle 1 case 0xC070: resetPaddles(); break; // paddle timer RST case 0xC080: // LANGUAGE CARD : case 0xC084: LCBK2 = 1; LCRD = 1; LCWR = 0; LCWFF = 0; break; // LC2RD case 0xC081: case 0xC085: LCBK2 = 1; LCRD = 0; LCWR |= LCWFF; LCWFF = !WRT; break; // LC2WR case 0xC082: case 0xC086: LCBK2 = 1; LCRD = 0; LCWR = 0; LCWFF = 0; break; // ROMONLY2 case 0xC083: case 0xC087: LCBK2 = 1; LCRD = 1; LCWR |= LCWFF; LCWFF = !WRT; break; // LC2RW case 0xC088: case 0xC08C: LCBK2 = 0; LCRD = 1; LCWR = 0; LCWFF = 0; break; // LC1RD case 0xC089: case 0xC08D: LCBK2 = 0; LCRD = 0; LCWR |= LCWFF; LCWFF = !WRT; break; // LC1WR case 0xC08A: case 0xC08E: LCBK2 = 0; LCRD = 0; LCWR = 0; LCWFF = 0; break; // ROMONLY1 case 0xC08B: case 0xC08F: LCBK2 = 0; LCRD = 1; LCWR |= LCWFF; LCWFF = !WRT; break; // LC1RW case 0xC0E0: case 0xC0E1: case 0xC0E2: case 0xC0E3: case 0xC0E4: case 0xC0E5: case 0xC0E6: case 0xC0E7: stepMotor(address); break; // MOVE DRIVE HEAD case 0xCFFF: case 0xC0E8: disk[curDrv].motorOn = false; break; // MOTOROFF case 0xC0E9: disk[curDrv].motorOn = true; break; // MOTORON case 0xC0EA: setDrv(0); break; // DRIVE0EN case 0xC0EB: setDrv(1); break; // DRIVE1EN case 0xC0EC: // Shift Data Latch if (disk[curDrv].writeMode) // writting disk[curDrv].data[disk[curDrv].track*0x1A00+disk[curDrv].nibble]=dLatch;// good luck gcc else // reading dLatch=disk[curDrv].data[disk[curDrv].track*0x1A00+disk[curDrv].nibble];// easy peasy disk[curDrv].nibble = (disk[curDrv].nibble + 1) % 0x1A00; // turn floppy of 1 nibble return dLatch; case 0xC0ED: dLatch = value; break; // Load Data Latch case 0xC0EE: // latch for READ disk[curDrv].writeMode = false; return disk[curDrv].readOnly ? 0x80 : 0; // check protection case 0xC0EF: disk[curDrv].writeMode = true; break; // latch for WRITE } return ticks % 0xFF; // catch all, gives a 'floating' value } //======================================================================= MEMORY // these two functions are imported into puce6502.c uint8_t readMem(uint16_t address) { if (address < RAMSIZE) return ram[address]; // RAM if (address >= ROMSTART) { if (!LCRD) return rom[address - ROMSTART]; // ROM if (LCBK2 && (address < 0xE000)) return bk2[address - BK2START]; // BK2 return lgc[address - LGCSTART]; // LC } if ((address & 0xFF00) == SL6START) return sl6[address - SL6START]; // disk][ if ((address & 0xF000) == 0xC000) return softSwitches(address, 0, false); // Soft Switches return ticks & 0xFF; // catch all, gives a 'floating' value } void writeMem(uint16_t address, uint8_t value) { if (address < RAMSIZE) { ram[address] = value; // RAM return; } if (LCWR && (address >= ROMSTART)) { if (LCBK2 && (address < 0xE000)) { bk2[address - BK2START] = value; // BK2 return; } lgc[address - LGCSTART] = value; // LC return; } if ((address & 0xF000) == 0xC000) { softSwitches(address, value, true); // Soft Switches return; } } //========================================================== PROGRAM ENTRY POINT int main(int argc, char *argv[]) { //========================================================= SDL INITIALIZATION int zoom = 2; uint8_t tries = 0; // for disk ][ speed-up access SDL_Event event; SDL_bool running = true, paused = false, ctrl = false, shift = false, alt = false; if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) < 0) { printf("failed to initialize SDL2 : %s", SDL_GetError()); return -1; } SDL_Window *wdo = SDL_CreateWindow("Reinette ][+", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 280 * zoom, 192 * zoom, SDL_WINDOW_OPENGL); SDL_Renderer *rdr = SDL_CreateRenderer(wdo, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC); SDL_SetRenderDrawBlendMode(rdr, SDL_BLENDMODE_NONE); // SDL_BLENDMODE_BLEND); SDL_EventState(SDL_DROPFILE, SDL_ENABLE); // ask SDL2 to read dropfile events SDL_RenderSetScale(rdr, zoom, zoom); SDL_Surface *sshot; // used later for the screenshots //=================================================== SDL AUDIO INITIALIZATION SDL_AudioSpec desired = { 96000, AUDIO_S8, 1, 0, 4096, 0, 0, NULL, NULL }; audioDevice = SDL_OpenAudioDevice(NULL, 0, &desired, NULL, SDL_FALSE); // get the audio device ID SDL_PauseAudioDevice(audioDevice, muted); // unmute it (muted is false) uint8_t volume = 4; for (int i = 0; i < audioBufferSize; i++) { // two audio buffers, audioBuffer[true][i] = volume; // one used when SPKR is true audioBuffer[false][i] = -volume; // the other when SPKR is false } //===================================== VARIABLES USED IN THE VIDEO PRODUCTION int TextCache[24][40] = { 0 }; int LoResCache[24][40] = { 0 }; int HiResCache[192][40] = { 0 }; // check which Hi-Res 7 dots needs redraw uint8_t previousBit[192][40] = { 0 }; // the last bit value of the byte before. enum characterAttribute { A_NORMAL, A_INVERSE, A_FLASH } glyphAttr; // character attribute in TEXT uint8_t flashCycle = 0; // TEXT cursor flashes at 2Hz SDL_Rect drvRect[2] = { { 272, 188, 4, 4 }, { 276, 188, 4, 4 } }; // disk drive status squares SDL_Rect pixelGR = { 0, 0, 7, 4 }; // a block in LoRes SDL_Rect dstRect = { 0, 0, 7, 8 }; // the dst character in rdr SDL_Rect charRects[128]; // the src from the norm and rev textures for (int c = 0; c < 128; c++) { // index of the array = ascii code charRects[c].x = 7 * c; charRects[c].y = 0; charRects[c].w = 7; charRects[c].h = 8; } const int color[16][3] = { // the 16 low res colors { 0, 0, 0 }, { 226, 57, 86 }, { 28, 116, 205 }, { 126, 110, 173 }, { 31, 129, 128 }, { 137, 130, 122 }, { 86, 168, 228 }, { 144, 178, 223 }, { 151, 88, 34 }, { 234, 108, 21 }, { 158, 151, 143 }, { 255, 206, 240 }, { 144, 192, 49 }, { 255, 253, 166 }, { 159, 210, 213 }, { 255, 255, 255 } }; const int hcolor[16][3] = { // the high res colors (2 light levels) { 0, 0, 0 }, { 144, 192, 49 }, { 126, 110, 173 }, { 255, 255, 255 }, { 0, 0, 0 }, { 234, 108, 21 }, { 86, 168, 228 }, { 255, 255, 255 }, { 0, 0, 0 }, { 63, 55, 86 }, { 72, 96, 25 }, { 255, 255, 255 }, { 0, 0, 0 }, { 43, 84, 114 }, { 117, 54, 10 }, { 255, 255, 255 } }; const int offsetGR[24] = { // helper for TEXT and GR video generation 0x0000, 0x0080, 0x0100, 0x0180, 0x0200, 0x0280, 0x0300, 0x0380, // lines 0-7 0x0028, 0x00A8, 0x0128, 0x01A8, 0x0228, 0x02A8, 0x0328, 0x03A8, // lines 8-15 0x0050, 0x00D0, 0x0150, 0x01D0, 0x0250, 0x02D0, 0x0350, 0x03D0 // lines 16-23 }; const int offsetHGR[192] = { // helper for HGR video generation 0x0000, 0x0400, 0x0800, 0x0C00, 0x1000, 0x1400, 0x1800, 0x1C00, // lines 0-7 0x0080, 0x0480, 0x0880, 0x0C80, 0x1080, 0x1480, 0x1880, 0x1C80, // lines 8-15 0x0100, 0x0500, 0x0900, 0x0D00, 0x1100, 0x1500, 0x1900, 0x1D00, // lines 16-23 0x0180, 0x0580, 0x0980, 0x0D80, 0x1180, 0x1580, 0x1980, 0x1D80, 0x0200, 0x0600, 0x0A00, 0x0E00, 0x1200, 0x1600, 0x1A00, 0x1E00, 0x0280, 0x0680, 0x0A80, 0x0E80, 0x1280, 0x1680, 0x1A80, 0x1E80, 0x0300, 0x0700, 0x0B00, 0x0F00, 0x1300, 0x1700, 0x1B00, 0x1F00, 0x0380, 0x0780, 0x0B80, 0x0F80, 0x1380, 0x1780, 0x1B80, 0x1F80, 0x0028, 0x0428, 0x0828, 0x0C28, 0x1028, 0x1428, 0x1828, 0x1C28, 0x00A8, 0x04A8, 0x08A8, 0x0CA8, 0x10A8, 0x14A8, 0x18A8, 0x1CA8, 0x0128, 0x0528, 0x0928, 0x0D28, 0x1128, 0x1528, 0x1928, 0x1D28, 0x01A8, 0x05A8, 0x09A8, 0x0DA8, 0x11A8, 0x15A8, 0x19A8, 0x1DA8, 0x0228, 0x0628, 0x0A28, 0x0E28, 0x1228, 0x1628, 0x1A28, 0x1E28, 0x02A8, 0x06A8, 0x0AA8, 0x0EA8, 0x12A8, 0x16A8, 0x1AA8, 0x1EA8, 0x0328, 0x0728, 0x0B28, 0x0F28, 0x1328, 0x1728, 0x1B28, 0x1F28, 0x03A8, 0x07A8, 0x0BA8, 0x0FA8, 0x13A8, 0x17A8, 0x1BA8, 0x1FA8, 0x0050, 0x0450, 0x0850, 0x0C50, 0x1050, 0x1450, 0x1850, 0x1C50, 0x00D0, 0x04D0, 0x08D0, 0x0CD0, 0x10D0, 0x14D0, 0x18D0, 0x1CD0, 0x0150, 0x0550, 0x0950, 0x0D50, 0x1150, 0x1550, 0x1950, 0x1D50, 0x01D0, 0x05D0, 0x09D0, 0x0DD0, 0x11D0, 0x15D0, 0x19D0, 0x1DD0, 0x0250, 0x0650, 0x0A50, 0x0E50, 0x1250, 0x1650, 0x1A50, 0x1E50, 0x02D0, 0x06D0, 0x0AD0, 0x0ED0, 0x12D0, 0x16D0, 0x1AD0, 0x1ED0, // lines 168-183 0x0350, 0x0750, 0x0B50, 0x0F50, 0x1350, 0x1750, 0x1B50, 0x1F50, // lines 176-183 0x03D0, 0x07D0, 0x0BD0, 0x0FD0, 0x13D0, 0x17D0, 0x1BD0, 0x1FD0 // lines 184-191 }; //================================= LOAD NORMAL AND REVERSE CHARACTERS BITMAPS char workDir[1000]; // find the working directory int workDirSize = 0, i = 0; while (argv[0][i] != '\0') { workDir[i] = argv[0][i]; if (argv[0][++i] == '\\') workDirSize = i + 1; // find the last '/' if any } SDL_Surface *tmpSurface; workDir[workDirSize] = 0; tmpSurface = SDL_LoadBMP(strncat(workDir, "assets/font-normal.bmp", 23)); // load the normal font SDL_Texture *normCharTexture = SDL_CreateTextureFromSurface(rdr, tmpSurface); SDL_FreeSurface(tmpSurface); workDir[workDirSize] = 0; tmpSurface = SDL_LoadBMP(strncat(workDir, "assets/font-reverse.bmp", 24)); // load the reverse font SDL_Texture *revCharTexture = SDL_CreateTextureFromSurface(rdr, tmpSurface); SDL_FreeSurface(tmpSurface); //================================================================== LOAD ROMS workDir[workDirSize] = 0; FILE *f = fopen(strncat(workDir, "rom/appleII+.rom", 17), "rb"); // load the Apple II+ ROM if (!f) { SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Fatal error", "Could not locate appleII+.rom in the rom folder", NULL); return 1; // exit } if (fread(rom, 1, ROMSIZE, f) != ROMSIZE) { // the file is too small SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Fatal error", "appleII+.rom should be exactly 12 KB", NULL); return 1; // exit } fclose(f); workDir[workDirSize] = 0; f = fopen(strncat(workDir, "rom/diskII.rom", 15), "rb"); // load the P5A disk ][ PROM if (!f) { SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Fatal error", "Could not locate diskII.rom in the rom folder", NULL); return 1; // exit } if (fread(sl6, 1, 256, f) != 256) { // file too small SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Fatal error", "diskII.rom should be exactly 256 bytes", NULL); return 1; // exit } fclose(f); //========================================================== VM INITIALIZATION if (argc > 1) insertFloppy(wdo, argv[1], 0); // load floppy if provided at command line // reset the CPU puce6502RST(); // reset the 6502 // dirty hack, fix soon... if I understand why ram[0x4D] = 0xAA; // Joust crashes if this memory location equals zero ram[0xD0] = 0xAA; // Planetoids won't work if this memory location equals zero //================================================================== MAIN LOOP while (running) { if (!paused) { // the apple II is clocked at 1023000.0 Hhz puce6502Exec(17050); // execute instructions for 1/60 of a second while (disk[curDrv].motorOn && ++tries) // until motor is off or i reaches 255+1=0 puce6502Exec(5000); // speed up drive access artificially } //=============================================================== USER INPUT while (SDL_PollEvent(&event)) { alt = SDL_GetModState() & KMOD_ALT ? true : false; ctrl = SDL_GetModState() & KMOD_CTRL ? true : false; shift = SDL_GetModState() & KMOD_SHIFT ? true : false; PB0 = alt ? 0xFF : 0x00; // update push button 0 PB1 = ctrl ? 0xFF : 0x00; // update push button 1 PB2 = shift ? 0xFF : 0x00; // update push button 2 if (event.type == SDL_QUIT) running = false; // WM sent TERM signal // if (event.type == SDL_WINDOWEVENT) { // pause if the window loses focus // if (event.window.event == SDL_WINDOWEVENT_FOCUS_LOST) // paused = true; // else if (event.window.event == SDL_WINDOWEVENT_FOCUS_GAINED) // paused = false; // } if (event.type == SDL_DROPFILE) { // user dropped a file char *filename = event.drop.file; // get full pathname if (!insertFloppy(wdo, filename, alt)) // if ALT is pressed : drv 1 else drv 0 SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Load", "Not a valid nib file", NULL); SDL_free(filename); // free filename memory paused = false; // might already be the case if (!(alt || ctrl)) { // if ALT or CTRL were not pressed ram[0x3F4] = 0; // unset the Power-UP byte puce6502RST(); // do a cold reset memset(ram, 0, sizeof(ram)); } } if (event.type == SDL_KEYDOWN) { // a key has been pressed switch (event.key.keysym.sym) { // EMULATOR CONTROLS : case SDLK_F1: // SAVES if (ctrl) { if (saveFloppy(0)) SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_INFORMATION, "Save", "\nDisk 1 saved back to file\n", NULL); else SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Save", "\nTError while saving Disk 1\n", NULL); } else if (alt) { if (saveFloppy(1)) SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_INFORMATION, "Save", "\nDisk 2 saved back to file\n", NULL); else SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Save", "\nError while saving Disk 2\n", NULL); } else { SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_WARNING, "Save", "CTRL-F1 to save D1\nALT-F1 to save D2\n", NULL); } break; case SDLK_F2: { // SCREENSHOTS sshot = SDL_GetWindowSurface(wdo); SDL_RenderReadPixels(rdr, NULL, SDL_GetWindowPixelFormat(wdo), sshot->pixels, sshot->pitch); workDir[workDirSize] = 0; int i = -1, a = 0, b = 0; while (disk[0].filename[++i] != '\0') { if (disk[0].filename[i] == '\\') a = i; if (disk[0].filename[i] == '.') b = i; } strncat(workDir, "screenshots\\", 14); if (a != b) strncat(workDir, disk[0].filename + a, b - a); else strncat(workDir, "no disk", 10); strncat(workDir, ".bmp", 5); SDL_SaveBMP(sshot, workDir); SDL_FreeSurface(sshot); } break; case SDLK_F3: // PASTE text from clipboard if (SDL_HasClipboardText()) { char *clipboardText = SDL_GetClipboardText(); int c = 0; while (clipboardText[c]) { // all chars until ascii NUL KBD = clipboardText[c++] | 0x80; // set bit7 if (KBD == 0x8A) KBD = 0x8D; // translate Line Feed to Carriage Ret puce6502Exec(400000); // give cpu (and applesoft) some cycles to process each char } SDL_free(clipboardText); // release the ressource } break; case SDLK_F4: // VOLUME if (shift && (volume < 120)) volume++; // increase volume if (ctrl && (volume > 0)) volume--; // decrease volume if (!ctrl && !shift) muted = !muted; // toggle mute / unmute for (int i = 0; i < audioBufferSize; i++) { // update the audio buffers, audioBuffer[true][i] = volume; // one used when SPKR is true audioBuffer[false][i] = -volume; // the other when SPKR is false } break; case SDLK_F5: // JOYSTICK Release Speed if (shift && (GCReleaseSpeed < 127)) GCReleaseSpeed += 2; // increase Release Speed if (ctrl && (GCReleaseSpeed > 1)) GCReleaseSpeed -= 2; // decrease Release Speed if (!ctrl && !shift) GCReleaseSpeed = 8; // reset Release Speed to 8 break; case SDLK_F6: // JOYSTICK Action Speed if (shift && (GCActionSpeed < 127)) GCActionSpeed += 2; // increase Action Speed if (ctrl && (GCActionSpeed > 1)) GCActionSpeed -= 2; // decrease Action Speed if (!ctrl && !shift) GCActionSpeed = 8; // reset Action Speed to 8 break; case SDLK_F7: // ZOOM if (shift && (zoom < 8)) zoom++; // zoom in if (ctrl && (zoom > 1)) zoom--; // zoom out if (!ctrl && !shift) zoom = 2; // reset zoom to 2 SDL_SetWindowSize(wdo, 280 * zoom, 192 * zoom); // update window size SDL_RenderSetScale(rdr, zoom, zoom); // update renderer size break; case SDLK_F10: paused = !paused; break; // toggle pause case SDLK_F11: puce6502RST(); break; // simulate a reset case SDLK_F12: // help box SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_INFORMATION, "Help", "\tReinette ][ plus v0.4.8\n" "\n" "ctrl F1\twrites the changes of the floppy in drive 0\n" "alt F1\twrites the changes of the floppy in drive 1\n" "\n" "F2\tsave a screenshot into the screenshots directory\n" "F3\tpaste text from clipboard\n" "\n" "F4\tmute / un-mute sound\n" "shift F4\tincrease volume\n" "ctrl F4\tdecrease volume\n" "\n" "F5\treset joystick release speed\n" "shift F5\tincrease joystick release speed\n" "crtl F5\tdecrease joystick release speed\n" "\n" "F6\treset joystick action speed\n" "shift F6\tincrease joystick action speed\n" "crtl F6\tdecrease joystick action speed\n" "\n" "F7\treset zoom to 2:1\n" "shift F7\tincrease zoom up to 8:1\n" "ctrl F7\tdecrease zoom down to 1:1\n" "\n" "F10\tpause / un-pause the emulator\n" "F11\treset\n" "\n" "F12\tthis help\n" "\n" "More information at github.com/ArthurFerreira2\n", NULL); break; // EMULATED KEYS : case SDLK_a: KBD = ctrl ? 0x81: 0xC1; break; // a case SDLK_b: KBD = ctrl ? 0x82: 0xC2; break; // b STX case SDLK_c: KBD = ctrl ? 0x83: 0xC3; break; // c ETX case SDLK_d: KBD = ctrl ? 0x84: 0xC4; break; // d EOT case SDLK_e: KBD = ctrl ? 0x85: 0xC5; break; // e case SDLK_f: KBD = ctrl ? 0x86: 0xC6; break; // f ACK case SDLK_g: KBD = ctrl ? 0x87: 0xC7; break; // g BELL case SDLK_h: KBD = ctrl ? 0x88: 0xC8; break; // h BS case SDLK_i: KBD = ctrl ? 0x89: 0xC9; break; // i HTAB case SDLK_j: KBD = ctrl ? 0x8A: 0xCA; break; // j LF case SDLK_k: KBD = ctrl ? 0x8B: 0xCB; break; // k VTAB case SDLK_l: KBD = ctrl ? 0x8C: 0xCC; break; // l FF case SDLK_m: KBD = ctrl ? shift ? 0x9D: 0x8D: 0xCD; break; // m CR ] case SDLK_n: KBD = ctrl ? shift ? 0x9E: 0x8E: 0xCE; break; // n ^ case SDLK_o: KBD = ctrl ? 0x8F: 0xCF; break; // o case SDLK_p: KBD = ctrl ? shift ? 0x80: 0x90: 0xD0; break; // p @ case SDLK_q: KBD = ctrl ? 0x91: 0xD1; break; // q case SDLK_r: KBD = ctrl ? 0x92: 0xD2; break; // r case SDLK_s: KBD = ctrl ? 0x93: 0xD3; break; // s ESC case SDLK_t: KBD = ctrl ? 0x94: 0xD4; break; // t case SDLK_u: KBD = ctrl ? 0x95: 0xD5; break; // u NAK case SDLK_v: KBD = ctrl ? 0x96: 0xD6; break; // v case SDLK_w: KBD = ctrl ? 0x97: 0xD7; break; // w case SDLK_x: KBD = ctrl ? 0x98: 0xD8; break; // x CANCEL case SDLK_y: KBD = ctrl ? 0x99: 0xD9; break; // y case SDLK_z: KBD = ctrl ? 0x9A: 0xDA; break; // z case SDLK_LEFTBRACKET: KBD = ctrl ? 0x9B: 0xDB; break; // [ { case SDLK_BACKSLASH: KBD = ctrl ? 0x9C: 0xDC; break; // \ | case SDLK_RIGHTBRACKET: KBD = ctrl ? 0x9D: 0xDD; break; // ] } case SDLK_BACKSPACE: KBD = ctrl ? 0xDF: 0x88; break; // BS case SDLK_0: KBD = shift? 0xA9: 0xB0; break; // 0 ) case SDLK_1: KBD = shift? 0xA1: 0xB1; break; // 1 ! case SDLK_2: KBD = shift? 0xC0: 0xB2; break; // 2 case SDLK_3: KBD = shift? 0xA3: 0xB3; break; // 3 # case SDLK_4: KBD = shift? 0xA4: 0xB4; break; // 4 $ case SDLK_5: KBD = shift? 0xA5: 0xB5; break; // 5 % case SDLK_6: KBD = shift? 0xDE: 0xB6; break; // 6 ^ case SDLK_7: KBD = shift? 0xA6: 0xB7; break; // 7 & case SDLK_8: KBD = shift? 0xAA: 0xB8; break; // 8 * case SDLK_9: KBD = shift? 0xA8: 0xB9; break; // 9 ( case SDLK_QUOTE: KBD = shift? 0xA2: 0xA7; break; // ' " case SDLK_EQUALS: KBD = shift? 0xAB: 0xBD; break; // = + case SDLK_SEMICOLON: KBD = shift? 0xBA: 0xBB; break; // ; : case SDLK_COMMA: KBD = shift? 0xBC: 0xAC; break; // , < case SDLK_PERIOD: KBD = shift? 0xBE: 0xAE; break; // . > case SDLK_SLASH: KBD = shift? 0xBF: 0xAF; break; // / ? case SDLK_MINUS: KBD = shift? 0xDF: 0xAD; break; // - _ case SDLK_BACKQUOTE: KBD = shift? 0xFE: 0xE0; break; // ` ~ case SDLK_LEFT: KBD = 0x88; break; // BS case SDLK_RIGHT: KBD = 0x95; break; // NAK case SDLK_SPACE: KBD = 0xA0; break; case SDLK_ESCAPE: KBD = 0x9B; break; // ESC case SDLK_RETURN: KBD = 0x8D; break; // CR // EMULATED JOYSTICK : case SDLK_KP_1: GCD[0] = -1; GCA[0] = 1; break; // pdl0 <- case SDLK_KP_3: GCD[0] = 1; GCA[0] = 1; break; // pdl0 -> case SDLK_KP_5: GCD[1] = -1; GCA[1] = 1; break; // pdl1 <- case SDLK_KP_2: GCD[1] = 1; GCA[1] = 1; break; // pdl1 -> } } if (event.type == SDL_KEYUP) { switch (event.key.keysym.sym) { case SDLK_KP_1: GCD[0] = 1; GCA[0] = 0; break; // pdl0 -> case SDLK_KP_3: GCD[0] = -1; GCA[0] = 0; break; // pdl0 <- case SDLK_KP_5: GCD[1] = 1; GCA[1] = 0; break; // pdl1 -> case SDLK_KP_2: GCD[1] = -1; GCA[1] = 0; break; // pdl1 <- } } } for (int pdl = 0; pdl < 2; pdl++) { // update the two paddles positions if (GCA[pdl]) { // actively pushing the stick GCP[pdl] += GCD[pdl] * GCActionSpeed; if (GCP[pdl] > 255) GCP[pdl] = 255; if (GCP[pdl] < 0) GCP[pdl] = 0; } else { // the stick is return back to center GCP[pdl] += GCD[pdl] * GCReleaseSpeed; if (GCD[pdl] == 1 && GCP[pdl] > 127) GCP[pdl] = 127; if (GCD[pdl] == -1 && GCP[pdl] < 127) GCP[pdl] = 127; } } //============================================================= VIDEO OUTPUT // HIGH RES GRAPHICS if (!TEXT && HIRES) { uint16_t word; uint8_t bits[16], bit, pbit, colorSet, even; uint16_t vRamBase = 0x2000 + PAGE2 * 0x2000; uint8_t lastLine = MIXED ? 160 : 192; uint8_t colorIdx = 0; // to index the color arrays for (int line = 0; line < lastLine; line++) { // for every line for (int col = 0; col < 40; col += 2) { // for every 7 horizontal dots int x = col * 7; even = 0; word = (uint16_t)(ram[vRamBase + offsetHGR[line] + col + 1]) << 8; // store the two next bytes into 'word' word += ram[vRamBase + offsetHGR[line] + col]; // in reverse order if (HiResCache[line][col] != word || !flashCycle) { // check if this group of 7 dots need a redraw for (bit=0; bit < 16; bit++) // store all bits 'word' into 'bits' bits[bit] = (word >> bit) & 1; colorSet = bits[7] * 4; // select the right color set pbit = previousBit[line][col]; // the bit value of the left dot bit = 0; // starting at 1st bit of 1st byte while (bit < 15) { // until we reach bit7 of 2nd byte if (bit == 7) { // moving into the second byte colorSet = bits[15] * 4; // update the color set bit++; // skip bit 7 } colorIdx = even + colorSet + (bits[bit] << 1) + (pbit); SDL_SetRenderDrawColor(rdr, hcolor[colorIdx][0], hcolor[colorIdx][1], hcolor[colorIdx][2], SDL_ALPHA_OPAQUE); SDL_RenderDrawPoint(rdr, x++, line); pbit = bits[bit++]; // proceed to the next pixel even = even ? 0 : 8; // one pixel every two is darker } HiResCache[line][col] = word; // update the video cache if ((col < 37) && (previousBit[line][col + 2] != pbit)) { // check color franging effect on the dot after previousBit[line][col + 2] = pbit; // set pbit and clear the HiResCache[line][col + 2] = -1; // video cache for next dot } } // if (HiResCache[line][col] ... } } } // lOW RES GRAPHICS else if (!TEXT) { // and not in HIRES uint16_t vRamBase = 0x400 + PAGE2 * 0x0400; uint8_t lastLine = MIXED ? 20 : 24; uint8_t glyph; // 2 blocks in GR uint8_t colorIdx = 0; // to index the color arrays for (int col = 0; col < 40; col++) { // for each column pixelGR.x = col * 7; for (int line = 0; line < lastLine; line++) { // for each row pixelGR.y = line * 8; // first block glyph = ram[vRamBase + offsetGR[line] + col]; // read video memory if (LoResCache[line][col] != glyph || !flashCycle) { LoResCache[line][col] = glyph; colorIdx = glyph & 0x0F; // first nibble SDL_SetRenderDrawColor(rdr, color[colorIdx][0], color[colorIdx][1], color[colorIdx][2], SDL_ALPHA_OPAQUE); SDL_RenderFillRect(rdr, &pixelGR); pixelGR.y += 4; // second block colorIdx = (glyph & 0xF0) >> 4; // second nibble SDL_SetRenderDrawColor(rdr, color[colorIdx][0], color[colorIdx][1], color[colorIdx][2], SDL_ALPHA_OPAQUE); SDL_RenderFillRect(rdr, &pixelGR); } } } } // TEXT 40 COLUMNS if (TEXT || MIXED) { // not Full Graphics uint16_t vRamBase = 0x400 +PAGE2 * 0x0400; uint8_t firstLine = TEXT ? 0 : 20; uint8_t glyph; // a TEXT character for (int col = 0; col < 40; col++) { // for each column dstRect.x = col * 7; for (int line = firstLine; line < 24; line++) { // for each row dstRect.y = line * 8; glyph = ram[vRamBase + offsetGR[line] + col]; // read video memory if (glyph > 0x7F) glyphAttr = A_NORMAL; // is NORMAL ? else if (glyph < 0x40) glyphAttr = A_INVERSE; // is INVERSE ? else glyphAttr = A_FLASH; // it's FLASH ! if (glyphAttr==A_FLASH || TextCache[line][col]!=glyph || !flashCycle){ TextCache[line][col] = glyph; glyph &= 0x7F; // unset bit 7 if (glyph > 0x5F) glyph &= 0x3F; // shifts to match if (glyph < 0x20) glyph |= 0x40; // the ASCII codes if (glyphAttr==A_NORMAL || (glyphAttr==A_FLASH && flashCycle<15)) SDL_RenderCopy(rdr, normCharTexture, &charRects[glyph], &dstRect); else SDL_RenderCopy(rdr, revCharTexture, &charRects[glyph], &dstRect); } } } } //====================================================== DISPLAY DISK STATUS if (disk[curDrv].motorOn) { // drive is active if (disk[curDrv].writeMode) SDL_SetRenderDrawColor(rdr, 255, 0, 0, 85); // red for writes else SDL_SetRenderDrawColor(rdr, 0, 255, 0, 85); // green for reads SDL_RenderFillRect(rdr, &drvRect[curDrv]); // square actually } //========================================================= SDL RENDER FRAME if (++flashCycle == 30) // increase cursor flash cycle flashCycle = 0; // reset to zero every half second SDL_RenderPresent(rdr); // swap buffers } // while (running) //================================================ RELEASE RESSOURSES AND EXIT SDL_AudioQuit(); SDL_Quit(); return 0; }