mirror of
https://github.com/ArthurFerreira2/reinette-II-plus.git
synced 2024-06-01 11:42:06 +00:00
728 lines
38 KiB
C
728 lines
38 KiB
C
/*
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reinette II plus, a french Apple II emulator, using SDL2
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and powered by puce6502 - a MOS 6502 cpu emulator by the same author
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Last modified 13th of August 2020
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Copyright (c) 2020 Arthur Ferreira (arthur.ferreira2gmail.com)
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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#include <stdio.h>
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#include <SDL2/SDL.h>
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#include "puce6502.h"
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//================================================================ SOFT SWITCHES
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uint8_t KBD = 0; // 0xC000, 0xC010 ascii value of keyboard input
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bool SPKR = false; // 0xC030 Speaker toggle
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bool TEXT = true; // 0xC050 CLRTEXT / 0xC051 SETTEXT
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bool MIXED = false; // 0xC052 CLRMIXED / 0xC053 SETMIXED
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uint8_t PAGE = 1; // 0xC054 PAGE1 / 0xC055 PAGE2
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bool HIRES = false; // 0xC056 GR / 0xC057 HGR
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uint8_t PB0 = 0; // 0xC061 Push Button 0 (bit 7) / Open Apple
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uint8_t PB1 = 0; // 0xC062 Push Button 1 (bit 7) / Solid Apple
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uint8_t PB2 = 0; // 0xC063 Push Button 2 (bit 7) / shift mod !!!
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uint8_t GC0 = 0; // 0xC064 Game Controller 0 (bit 7)
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uint8_t GC1 = 0; // 0xC065 Game Controller 1 (bit 7)
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float TGC0, TGC1; // Timers for GC0 and GC1
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float trimGC = .24; // Game Controller trim use F5 and F6 to adjust it
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//======================================================================== AUDIO
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#define audioBufferSize 512 // found to be large enought
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double rate = 23.19727891156463; // 1023000 Hz / 44100 Hz (the wavSpec.freq)
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bool muted = false; // press F9 to mute/unmute
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SDL_AudioDeviceID audioDevice;
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Sint8 audioBuffer[2][audioBufferSize] = {0}; // see main() for more details
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//====================================================================== DISK ][
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uint8_t slot6[256] = {0}; // P5A disk ][ PROM in slot 6
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struct drive{
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char filename[512]; // the full disk image path
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bool readOnly; // based on the image file attributes
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uint8_t data[232960]; // nibblelized disk image
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bool motorOn; // motor status
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bool writeMode; // writes to file are not implemented
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uint8_t track; // current track position
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uint16_t nibble; // ptr to nibble under head position
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} disk[2] = {0}; // two disk ][ drive units
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int curDrv = 0; // only one can be enabled at a time
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int insertFloppy(SDL_Window *wdo, char *filename, int drv){
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int i, a, b;
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char title[1024];
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FILE *f = fopen(filename, "rb"); // open it in read binary
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if (!f){
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printf("Could not open %s\n", filename);
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return(0);
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}
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if (fread(disk[drv].data, 1, 232960, f) != 232960){ // load it into memory and check size
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printf("Floppy image should be exactly 232960 Bytes long\n");
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return(0);
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}
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fclose(f);
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sprintf(disk[drv].filename,"%s", filename); // update disk filename
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f = fopen(filename, "ab"); // check if file is writeable
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if (f){
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disk[drv].readOnly = false; // f will be NULL if open in W failed
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fclose(f);
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}
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else disk[drv].readOnly = true;
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i = a = 0;
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while (disk[0].filename[i] != 0) // find start of filename for disk0
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if (disk[0].filename[i++] == '\\') a = i;
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i = b = 0;
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while (disk[1].filename[i] != 0) // find start of filename for disk1
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if (disk[1].filename[i++] == '\\') b = i;
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sprintf(title, "reinette II+ D1: %s D2: %s", disk[0].filename + a, \
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disk[1].filename + b);
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SDL_SetWindowTitle(wdo, title); // updates window title
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return(1);
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}
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void stepMotor(uint16_t address){
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static bool phases[2][4] = {0}; // phases states (for both drives)
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static bool phasesB[2][4] = {0}; // phases states Before
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static bool phasesBB[2][4] = {0}; // phases states Before Before
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static int pIdx[2] = {0}; // phase index (for both drives)
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static int pIdxB[2] = {0}; // phase index Before
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static int halfTrackPos[2] = {0};
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address &= 7;
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int phase = address >> 1;
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phasesBB[curDrv][pIdxB[curDrv]] = phasesB[curDrv][pIdxB[curDrv]];
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phasesB[curDrv][pIdx[curDrv]] = phases[curDrv][pIdx[curDrv]];
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pIdxB[curDrv] = pIdx[curDrv];
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pIdx[curDrv] = phase;
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if (!(address & 1)){ // head not moving (PHASE x OFF)
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phases[curDrv][phase] = false;
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return;
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}
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if ((phasesBB[curDrv][(phase + 1) & 3]) && (--halfTrackPos[curDrv] < 0)) // head is moving in
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halfTrackPos[curDrv] = 0;
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if ((phasesBB[curDrv][(phase - 1) & 3]) && (++halfTrackPos[curDrv] > 140)) // head is moving out
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halfTrackPos[curDrv] = 140;
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phases[curDrv][phase] = true; // update track#
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disk[curDrv].track = (halfTrackPos[curDrv] + 1) / 2;
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disk[curDrv].nibble = 0; // not sure this is necessary ?
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}
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//========================================== MEMORY MAPPED SOFT SWITCHES HANDLER
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// this function is called from readMem and writeMem in puce6502
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// it complements both functions when address is between 0xC000 and 0xCFFF
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uint8_t softSwitches(uint16_t address, uint8_t value){
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static uint8_t dLatch = 0; // disk ][ I/O reg
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static long long int lastTick = 0LL;
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if ((address >> 8) == 0xC6) return(slot6[address - 0xC600]); // disk ][ PROM
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switch (address){
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case 0xC000: return(KBD); // KEYBOARD
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case 0xC010: KBD &= 0x7F; return(KBD); // key STROBE
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case 0xC020: // TAPEOUT (shall we listen it ?)
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case 0xC030: // SPEAKER
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case 0xC033: // apple invader
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if (!muted){
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SPKR = !SPKR; // toggle speaker
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Uint32 length = (ticks - lastTick) / rate;
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lastTick = ticks;
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if (length > audioBufferSize) length = audioBufferSize;
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SDL_QueueAudio(audioDevice, audioBuffer[SPKR], length);
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}
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break;
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case 0xC050: TEXT = false; break; // Graphics
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case 0xC051: TEXT = true; break; // Text
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case 0xC052: MIXED = false; break; // Mixed off
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case 0xC053: MIXED = true; break; // Mixed on
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case 0xC054: PAGE = 1; break; // Page 1
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case 0xC055: PAGE = 2; break; // Page 2
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case 0xC056: HIRES = false; break; // HiRes off
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case 0xC057: HIRES = true; break; // HiRes on
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case 0xC061: return(PB0); // Push Button 0
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case 0xC062: return(PB1); // Push Button 1
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case 0xC063: return(PB2); // Push Button 2
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case 0xC064: return((TGC0-=trimGC) > 192? 0x80: 0x00); // Paddle 0
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case 0xC065: return((TGC1-=trimGC) > 192? 0x80: 0x00); // Paddle 1
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case 0xC070: TGC0 = GC0; TGC1 = GC1; break; // paddle timer RST
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case 0xC0E0: // PHASE0OFF
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case 0xC0E1: // PHASE0ON
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case 0xC0E2: // PHASE1OFF
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case 0xC0E3: // PHASE1ON
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case 0xC0E4: // PHASE2OFF
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case 0xC0E5: // PHASE2ON
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case 0xC0E6: // PHASE3OFF
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case 0xC0E7: stepMotor(address); break; // PHASE3ON
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case 0xC0E8: disk[curDrv].motorOn = false; break; // MOTOROFF
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case 0xC0E9: disk[curDrv].motorOn = true; break; // MOTORON
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case 0xC0EA: // DRIVE0EN
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disk[0].motorOn = disk[1].motorOn || disk[0].motorOn;
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disk[1].motorOn = false;
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curDrv = 0;
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break;
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case 0xC0EB: // DRIVE1EN
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disk[1].motorOn = disk[0].motorOn || disk[1].motorOn;
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disk[0].motorOn = false;
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curDrv = 1;
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break;
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case 0xC0EC: // Shift Data Latch
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if (disk[curDrv].writeMode) // writting
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disk[curDrv].data[disk[curDrv].track*0x1A00+disk[curDrv].nibble]=dLatch;
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else // reading
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dLatch=disk[curDrv].data[disk[curDrv].track*0x1A00+disk[curDrv].nibble];
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disk[curDrv].nibble = (disk[curDrv].nibble+1)%0x1A00; // turn floppy
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return(dLatch);
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case 0xC0ED: dLatch = value; break; // Load Data Latch
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case 0xC0EE: // latch for READ
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disk[curDrv].writeMode = false;
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return(disk[curDrv].readOnly ? 0x80 : 0); // check protection
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case 0xC0EF: disk[curDrv].writeMode = true; break; // latch for WRITE
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default: printf("Uncaught Soft Switch access at %04X\n", address);
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}
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return(0); // catch all
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}
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//========================================================== PROGRAM ENTRY POINT
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int main(int argc, char *argv[]){
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// SDL INITIALIZATION
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int zoom = 2;
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const float frameDelay = 1000/60; // targeting 60 FPS
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float fps = 60;
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Uint32 frameStart = 0, frameTime = 0, frame = 0, reftime = 0, blink = 0;
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SDL_Event event;
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bool paused = false, running = true, ctrl, shift, alt;
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if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) < 0) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "[DEBUG] > %s", SDL_GetError());
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return(10);
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}
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SDL_EventState(SDL_DROPFILE, SDL_ENABLE);
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SDL_Window *wdo = SDL_CreateWindow("reinette II+", SDL_WINDOWPOS_CENTERED, \
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SDL_WINDOWPOS_CENTERED, 280*zoom, 192*zoom, SDL_WINDOW_OPENGL);
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SDL_Surface *icon = SDL_LoadBMP("icon.bmp"); // add an icon to the window title bar
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SDL_SetColorKey(icon, SDL_TRUE, SDL_MapRGB(icon->format, 255, 255, 255));
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SDL_SetWindowIcon(wdo, icon);
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SDL_Renderer *rdr = SDL_CreateRenderer(wdo, -1, SDL_RENDERER_ACCELERATED); // | SDL_RENDERER_PRESENTVSYNC);
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SDL_SetRenderDrawBlendMode(rdr, SDL_BLENDMODE_NONE); // SDL_BLENDMODE_BLEND);
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SDL_RenderSetScale(rdr, zoom, zoom);
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// SDL AUDIO INITIALIZATION
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SDL_AudioSpec desired = {44100, AUDIO_S8, 1, 0, 4096, 0, 0, NULL, NULL};
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audioDevice = SDL_OpenAudioDevice(NULL, 0, &desired, NULL, SDL_FALSE);
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SDL_PauseAudioDevice(audioDevice, muted);
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for (int i=0; i<audioBufferSize; i++){ // two audio buffers, one when the speaker is 'on', the other when it's 'off'
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audioBuffer[true][i] = 127; // when SPKR==true : 1/2 of max amplitude
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audioBuffer[false][i] = 0; // when SPKR==false : silence
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}
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// LOAD NORMAL AND REVERSE CHARACTERS BITMAPS
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SDL_Surface *tmpSurface = SDL_LoadBMP("font-normal.bmp");
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SDL_Texture *normCharTexture = SDL_CreateTextureFromSurface(rdr, tmpSurface);
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SDL_FreeSurface(tmpSurface);
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tmpSurface = SDL_LoadBMP("font-reverse.bmp");
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SDL_Texture *revCharTexture = SDL_CreateTextureFromSurface(rdr, tmpSurface);
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SDL_FreeSurface(tmpSurface);
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// VARIABLES USED IN THE VIDEO PRODUCTION
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uint16_t previousDots[192][40] = {0}; // check which Hi-Res 7 dots needs redraw
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int previousBit[192][40] = {0}; // the last bit value of the byte before.
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uint8_t glyph; // a TEXT character, or 2 blocks in GR
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uint8_t colorIdx = 0; // to index the color arrays
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uint16_t vRamBase = 0x0400; // can be 0x0400, 0x0800, 0x2000 or 0x4000
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int lineLimit;
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enum characterAttribute {A_NORMAL, A_INVERSE, A_FLASH} glyphAttribute;
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bool monochrome = false;
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SDL_Rect drvRect[2] = { {272, 188, 4, 4}, {276, 188, 4, 4} }; // disk drive status squares
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SDL_Rect pixelGR = {0, 0, 7, 4}; // a block in LoRes
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SDL_Rect dstRect = {0, 0, 7, 8}; // the dst character in rdr
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SDL_Rect charRects[128]; // the src from the norm and rev textures
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for (int c=0; c<128; c++){ // index of the array = ascii code
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charRects[c].x = 7 * c;
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charRects[c].y = 0;
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charRects[c].w = 7;
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charRects[c].h = 8;
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}
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const int color[16][3] = { // the 16 low res colors
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{ 0, 0, 0}, {226, 57, 86}, { 28, 116,205}, {126, 110, 173},
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{ 31, 129, 128}, {137, 130, 122}, { 86, 168,228}, {144, 178, 223},
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{151, 88, 34}, {234, 108, 21}, {158, 151,143}, {255, 206, 240},
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{144, 192, 49}, {255, 253, 166}, {159, 210,213}, {255, 255, 255}};
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const int hcolor[16][3] = { // the high res colors (2 lights)
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{ 0, 0, 0}, {144, 192, 49}, {126, 110, 173}, {255, 255, 255},
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{ 0, 0, 0}, {234, 108, 21}, { 86, 168, 228}, {255, 255, 255},
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{ 0, 0, 0}, { 63, 55, 86}, { 72, 96, 25}, {255, 255, 255},
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{ 0, 0, 0}, { 43, 84, 114}, {117, 54, 10}, {255, 255, 255}};
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const int offsetGR[24] = { // helper for TEXT and GR video generation
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0x000, 0x080, 0x100, 0x180, 0x200, 0x280, 0x300, 0x380, // lines 0-7
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0x028, 0x0A8, 0x128, 0x1A8, 0x228, 0x2A8, 0x328, 0x3A8, // lines 8-15
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0x050, 0x0D0, 0x150, 0x1D0, 0x250, 0x2D0, 0x350, 0x3D0}; // lines 16-23
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const int offsetHGR[192] = { // helper for HGR video generation
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0x0000, 0x0400, 0x0800, 0x0C00, 0x1000, 0x1400, 0x1800, 0x1C00, // 0-7
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0x0080, 0x0480, 0x0880, 0x0C80, 0x1080, 0x1480, 0x1880, 0x1C80, // 8-15
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0x0100, 0x0500, 0x0900, 0x0D00, 0x1100, 0x1500, 0x1900, 0x1D00, // 16-23
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0x0180, 0x0580, 0x0980, 0x0D80, 0x1180, 0x1580, 0x1980, 0x1D80,
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0x0200, 0x0600, 0x0A00, 0x0E00, 0x1200, 0x1600, 0x1A00, 0x1E00,
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0x0280, 0x0680, 0x0A80, 0x0E80, 0x1280, 0x1680, 0x1A80, 0x1E80,
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0x0300, 0x0700, 0x0B00, 0x0F00, 0x1300, 0x1700, 0x1B00, 0x1F00,
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0x0380, 0x0780, 0x0B80, 0x0F80, 0x1380, 0x1780, 0x1B80, 0x1F80,
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0x0028, 0x0428, 0x0828, 0x0C28, 0x1028, 0x1428, 0x1828, 0x1C28,
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0x00A8, 0x04A8, 0x08A8, 0x0CA8, 0x10A8, 0x14A8, 0x18A8, 0x1CA8,
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0x0128, 0x0528, 0x0928, 0x0D28, 0x1128, 0x1528, 0x1928, 0x1D28,
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0x01A8, 0x05A8, 0x09A8, 0x0DA8, 0x11A8, 0x15A8, 0x19A8, 0x1DA8,
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0x0228, 0x0628, 0x0A28, 0x0E28, 0x1228, 0x1628, 0x1A28, 0x1E28,
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0x02A8, 0x06A8, 0x0AA8, 0x0EA8, 0x12A8, 0x16A8, 0x1AA8, 0x1EA8,
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0x0328, 0x0728, 0x0B28, 0x0F28, 0x1328, 0x1728, 0x1B28, 0x1F28,
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0x03A8, 0x07A8, 0x0BA8, 0x0FA8, 0x13A8, 0x17A8, 0x1BA8, 0x1FA8,
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0x0050, 0x0450, 0x0850, 0x0C50, 0x1050, 0x1450, 0x1850, 0x1C50,
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0x00D0, 0x04D0, 0x08D0, 0x0CD0, 0x10D0, 0x14D0, 0x18D0, 0x1CD0,
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0x0150, 0x0550, 0x0950, 0x0D50, 0x1150, 0x1550, 0x1950, 0x1D50,
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0x01D0, 0x05D0, 0x09D0, 0x0DD0, 0x11D0, 0x15D0, 0x19D0, 0x1DD0,
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0x0250, 0x0650, 0x0A50, 0x0E50, 0x1250, 0x1650, 0x1A50, 0x1E50,
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0x02D0, 0x06D0, 0x0AD0, 0x0ED0, 0x12D0, 0x16D0, 0x1AD0, 0x1ED0, // 168-183
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0x0350, 0x0750, 0x0B50, 0x0F50, 0x1350, 0x1750, 0x1B50, 0x1F50, // 176-183
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0x03D0, 0x07D0, 0x0BD0, 0x0FD0, 0x13D0, 0x17D0, 0x1BD0, 0x1FD0}; // 184-191
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// VM INITIALIZATION
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FILE *f = fopen("appleII+.rom", "rb"); // load the Apple II+ ROM
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if (!f){
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printf("Could not open appleII+.rom\n");
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return(1);
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}
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if (fread(rom, 1, ROMSIZE, f) != ROMSIZE){
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printf("appleII+.rom should be 12KB\n");
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return(1);
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}
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fclose(f);
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f = fopen("diskII.rom", "rb"); // load the P5A disk ][ PROM
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if (!f){
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printf("Could not open diskII.rom\n");
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return(1);
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}
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if (fread(slot6, 1, 256, f) != 256){
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printf("diskII.rom should be 256 Bytes\n");
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return(1);
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}
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fclose(f);
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if (argc > 1) insertFloppy(wdo, argv[1], 0); // load .nib in drive 0
|
|
|
|
puce6502Reset(); // reset the 6502
|
|
|
|
|
|
|
|
//================================================================== MAIN LOOP
|
|
|
|
reftime = SDL_GetTicks();
|
|
|
|
while (running){
|
|
|
|
frameStart = SDL_GetTicks(); // start of a new frame
|
|
|
|
if (!paused){
|
|
puce6502Exec((long long int)(1023000.0 / fps)); // adjusted ~1M/60 to the actual frame rate
|
|
int i;
|
|
i = 0;
|
|
while (disk[curDrv].motorOn && i < 50){ // until motor is off or i reaches 50
|
|
puce6502Exec(10000); // artificial drive speed up
|
|
i++;
|
|
}
|
|
}
|
|
|
|
//=============================================================== 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){
|
|
// if(event.window.event == SDL_WINDOWEVENT_FOCUS_LOST)
|
|
// paused = true;
|
|
// 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
|
|
insertFloppy(wdo, filename, alt); // if ALT : drv 1 else drv 0
|
|
SDL_free(filename); // free filename memory
|
|
paused = false; // might already be the case
|
|
if (!(alt || ctrl)) // unless ALT or CTRL were
|
|
puce6502Goto(0xC600); // pressed, force reboot
|
|
}
|
|
|
|
if (event.type == SDL_KEYDOWN) // a key has been pressed
|
|
|
|
switch (event.key.keysym.sym){
|
|
|
|
// EMULATOR CONTROL :
|
|
|
|
case SDLK_F1: // save disk 0 back to host
|
|
if (disk[0].filename[0] && !disk[0].readOnly){
|
|
f = fopen(disk[0].filename, "wb");
|
|
if (f){
|
|
if (fwrite(disk[0].data, 1, 232960, f) != 232960){
|
|
printf("Write failed\n");
|
|
}
|
|
fclose(f);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case SDLK_F2: // save disk 1 back to host
|
|
if (disk[1].filename[0] && !disk[1].readOnly){
|
|
f = fopen(disk[1].filename, "wb");
|
|
if (f){
|
|
if (fwrite(disk[1].data, 1, 232960, f) != 232960){
|
|
printf("Write failed\n");
|
|
}
|
|
fclose(f);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case SDLK_F3: paused = !paused; break; // pause / un-pause
|
|
|
|
case SDLK_F4: // paste txt 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; // Line Feed to Carriage Ret
|
|
puce6502Exec(400000); // to process each char
|
|
}
|
|
SDL_free(clipboardText);
|
|
}
|
|
break;
|
|
|
|
case SDLK_F5: if ((zoom-=2) < 0) zoom = 0; // zoom out
|
|
case SDLK_F6: if (++zoom > 8) zoom = 8; // zoom in
|
|
SDL_SetWindowSize(wdo, 280*zoom, 192*zoom);
|
|
SDL_RenderSetScale(rdr, zoom, zoom); break;
|
|
|
|
case SDLK_F7: trimGC -= .01; break; // PDL Trim
|
|
case SDLK_F8: trimGC += .01; break; // PDL Trim
|
|
|
|
case SDLK_F9: muted = !muted; break; // mute
|
|
case SDLK_F10: monochrome = !monochrome; break; // ...
|
|
|
|
case SDLK_F11: // reset
|
|
if (ctrl)
|
|
puce6502Break();
|
|
else {
|
|
puce6502Reset();
|
|
softSwitches(0xC0E9,0); // drive0En
|
|
softSwitches(0xC0E8,0); // motorOff
|
|
}
|
|
break;
|
|
|
|
case SDLK_F12: running = false; break; // goodbye
|
|
|
|
// EMULATED KEYS :
|
|
|
|
case SDLK_ESCAPE: KBD = 0x9B; break; // ESC
|
|
case SDLK_RETURN: KBD = 0x8D; break; // CR
|
|
case SDLK_DELETE: KBD = 0x80; break; // DEL->NUL
|
|
case SDLK_LEFT: KBD = 0x88; break; // BS
|
|
case SDLK_RIGHT: KBD = 0x95; break; // NAK
|
|
case SDLK_BACKSPACE: KBD = 0x88; break; // BS
|
|
case SDLK_SPACE: KBD = 0xA0; break;
|
|
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 ? 0x8D: 0xCD; break; // m CR
|
|
case SDLK_n: KBD = ctrl ? 0x8E: 0xCE; break; // n
|
|
case SDLK_o: KBD = ctrl ? 0x8F: 0xCF; break; // o
|
|
case SDLK_p: KBD = ctrl ? 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_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_LEFTBRACKET: KBD = shift? 0xFB: 0xDB; break; // [ {
|
|
case SDLK_BACKSLASH: KBD = shift? 0xFC: 0xDC; break; // \ |
|
|
case SDLK_RIGHTBRACKET: KBD = shift? 0xFD: 0xDD; break; // ] }
|
|
case SDLK_BACKQUOTE: KBD = shift? 0xFE: 0xE0; break; // ` ~
|
|
|
|
// EMULATED JOYSTICK
|
|
|
|
case SDLK_KP_1: GC0 = 192; break; // pdl0 <-
|
|
case SDLK_KP_3: GC0 = 255; break; // pdl0 ->
|
|
case SDLK_KP_5: GC1 = 192; break; // pdl1 <-
|
|
case SDLK_KP_2: GC1 = 255; break; // pdl1 ->
|
|
}
|
|
|
|
if (event.type == SDL_KEYUP)
|
|
switch (event.key.keysym.sym){
|
|
case SDLK_KP_1: GC0 = 224; break; // reset
|
|
case SDLK_KP_3: GC0 = 224; break; // the
|
|
case SDLK_KP_5: GC1 = 224; break; // paddles
|
|
case SDLK_KP_2: GC1 = 224; break; // to center
|
|
}
|
|
}
|
|
|
|
//============================================================= VIDEO OUTPUT
|
|
|
|
// HIGH RES GRAPHICS
|
|
|
|
if (!TEXT && HIRES){
|
|
int word, bits[16], bit, pbit, colorSet, even;
|
|
vRamBase = PAGE * 0x2000; // PAGE is 1 or 2
|
|
lineLimit = MIXED ? 160 : 192;
|
|
|
|
for (int line=0; line<lineLimit; 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; // put the two next bytes into one word (in reverse order)
|
|
word += ram[ vRamBase + offsetHGR[line] + col ];
|
|
// check if this group of 7 dots need a redraw (ie was modified)
|
|
if (previousDots[line][col] != word || !blink){ // or refresh the full screen every 1/2 second (everytime blink is reset to 0)
|
|
|
|
for (bit=0; bit<16; bit++) bits[bit] = (word >> bit) & 1; // store all bits of the word into the 'bits' array
|
|
|
|
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
|
|
}
|
|
|
|
if (monochrome)
|
|
colorIdx = bits[bit] * 3; // black if bit==0, white if bit==1
|
|
else
|
|
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
|
|
}
|
|
|
|
previousDots[line][col] = word; // update the video cache
|
|
if ((col < 37) && (previousBit[line][col + 2] != pbit)){ // check it this dot has a color franging effect on the next dot
|
|
previousBit[line][col + 2] = pbit; // set pbit and clear the
|
|
previousDots[line][col + 2] = -1; // video cache for next dot
|
|
}
|
|
|
|
} // if (previousDots[line][col] ...
|
|
}
|
|
}
|
|
}
|
|
|
|
// lOW RES GRAPHICS
|
|
|
|
else if (!TEXT){ // not in text
|
|
vRamBase = PAGE * 0x0400;
|
|
lineLimit = MIXED ? 20 : 24;
|
|
|
|
for (int col=0; col<40; col++){ // for each column
|
|
pixelGR.x = col * 7;
|
|
for (int line=0; line<lineLimit; line++){ // for each row
|
|
pixelGR.y = line * 8; // first block
|
|
|
|
glyph = ram[vRamBase + offsetGR[line] + col]; // read video memory
|
|
|
|
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){
|
|
vRamBase = PAGE * 0x0400;
|
|
lineLimit = TEXT ? 0 : 20;
|
|
|
|
for (int col=0; col<40; col++){ // for each column
|
|
dstRect.x = col * 7;
|
|
for (int line=lineLimit; line<24; line++){ // for each row
|
|
dstRect.y = line * 8;
|
|
|
|
glyph = ram[vRamBase + offsetGR[line] + col]; // read video memory
|
|
|
|
if (glyph > 0x7F) glyphAttribute = A_NORMAL; // is NORMAL ?
|
|
else if (glyph < 0x40) glyphAttribute = A_INVERSE; // is INVERSE ?
|
|
else glyphAttribute = A_FLASH; // it's FLASH !
|
|
|
|
glyph &= 0x7F; // unset bit 7
|
|
|
|
if (glyph > 0x5F) glyph &= 0x3F; // shifts to match
|
|
if (glyph < 0x20) glyph |= 0x40; // the ASCII codes
|
|
|
|
if (glyphAttribute == A_NORMAL || blink < 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
|
|
|
|
frameTime = SDL_GetTicks() - frameStart; // frame duration
|
|
if (frameDelay > frameTime) { // do we have time ?
|
|
SDL_Delay(frameDelay - frameTime); // wait 'vsync'
|
|
SDL_RenderPresent(rdr); // swap buffers
|
|
} // else, skip frame
|
|
|
|
frame++;
|
|
if (frameStart > reftime + 1000){
|
|
fps = (float)(frame * 1000.0) / (float)(frameStart - reftime);
|
|
// printf("TIME:%d FPS:%f FRAME:%d\n", frameStart - reftime, fps, frame);
|
|
frame = 0;
|
|
reftime = SDL_GetTicks();
|
|
}
|
|
|
|
if (++blink == 30) blink = 0;
|
|
|
|
} // while (running)
|
|
|
|
//================================================ RELEASE RESSOURSES AND EXIT
|
|
|
|
SDL_AudioQuit();
|
|
SDL_Quit();
|
|
return(0);
|
|
}
|