mirror of https://github.com/JorjBauer/aiie.git
365 lines
9.1 KiB
C++
365 lines
9.1 KiB
C++
#include <stdio.h>
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#include <unistd.h>
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#include <curses.h>
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#include <termios.h>
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#include <pthread.h>
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#include "applevm.h"
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#include "sdl-display.h"
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#include "sdl-keyboard.h"
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#include "sdl-speaker.h"
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#include "sdl-paddles.h"
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#include "sdl-filemanager.h"
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#include "sdl-printer.h"
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#include "globals.h"
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#include "timeutil.h"
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#define SHOWFPS
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//#define SHOWPC
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//#define DEBUGCPU
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//#define SHOWMEMPAGE
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static struct timespec nextInstructionTime, startTime;
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uint64_t hitcount = 0;
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uint64_t misscount = 0;
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#define NB_ENABLE 1
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#define NB_DISABLE 0
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int send_rst = 0;
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pthread_t cpuThreadID;
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char disk1name[256] = "\0";
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char disk2name[256] = "\0";
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volatile bool wantSuspend = false;
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volatile bool wantResume = false;
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void sigint_handler(int n)
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{
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send_rst = 1;
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}
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void nonblock(int state)
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{
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struct termios ttystate;
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//get the terminal state
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tcgetattr(STDIN_FILENO, &ttystate);
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if (state==NB_ENABLE)
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{
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//turn off canonical mode
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ttystate.c_lflag &= ~ICANON;
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//minimum of number input read.
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ttystate.c_cc[VMIN] = 1;
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}
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else if (state==NB_DISABLE)
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{
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//turn on canonical mode
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ttystate.c_lflag |= ICANON;
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}
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//set the terminal attributes.
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tcsetattr(STDIN_FILENO, TCSANOW, &ttystate);
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}
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uint8_t read(void *arg, uint16_t address)
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{
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// no action; this is a dummy function until we've finished initializing...
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return 0x00;
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}
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void write(void *arg, uint16_t address, uint8_t v)
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{
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// no action; this is a dummy function until we've finished initializing...
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}
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static void *cpu_thread(void *dummyptr) {
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struct timespec currentTime;
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#if 0
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int policy;
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struct sched_param param;
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pthread_getschedparam(pthread_self(), &policy, ¶m);
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param.sched_priority = sched_get_priority_max(policy);
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pthread_setschedparam(pthread_self(), policy, ¶m);
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#endif
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_init_darwin_shim();
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do_gettime(&startTime);
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do_gettime(&nextInstructionTime);
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printf("free-running\n");
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while (1) {
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if (wantSuspend) {
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printf("CPU halted; suspending VM\n");
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g_vm->Suspend("suspend.vm");
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printf("... done; resuming CPU.\n");
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wantSuspend = false;
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}
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if (wantResume) {
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printf("CPU halted; resuming VM\n");
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g_vm->Resume("suspend.vm");
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printf("... done. resuming CPU.\n");
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wantResume = false;
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}
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// cycle down the CPU...
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do_gettime(¤tTime);
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struct timespec diff = tsSubtract(nextInstructionTime, currentTime);
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if (diff.tv_sec >= 0 && diff.tv_nsec >= 0) {
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hitcount++;
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nanosleep(&diff, NULL);
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} else {
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misscount++;
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}
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#ifdef DEBUGCPU
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uint8_t executed = g_cpu->Run(1);
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#else
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uint8_t executed = g_cpu->Run(24);
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#endif
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timespec_add_cycles(&startTime, g_cpu->cycles + executed, &nextInstructionTime);
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g_speaker->beginMixing();
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// The paddles need to be triggered in real-time on the CPU
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// clock. That happens from the VM's CPU maintenance poller.
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((AppleVM *)g_vm)->cpuMaintenance(g_cpu->cycles);
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// cpuMaintenance also maintained the sound card; update the speaker after
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g_speaker->maintainSpeaker(g_cpu->cycles);
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#ifdef DEBUGCPU
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{
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uint8_t p = g_cpu->flags;
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printf("OP: $%02x A: %02x X: %02x Y: %02x PC: $%04x SP: %02x Flags: %c%cx%c%c%c%c%c\n",
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g_vm->getMMU()->read(g_cpu->pc),
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g_cpu->a, g_cpu->x, g_cpu->y, g_cpu->pc, g_cpu->sp,
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p & (1<<7) ? 'N':' ',
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p & (1<<6) ? 'V':' ',
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p & (1<<4) ? 'B':' ',
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p & (1<<3) ? 'D':' ',
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p & (1<<2) ? 'I':' ',
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p & (1<<1) ? 'Z':' ',
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p & (1<<0) ? 'C':' '
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);
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}
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#endif
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if (send_rst) {
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#if 0
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printf("Scheduling suspend request...\n");
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wantSuspend = true;
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#endif
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#if 1
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printf("Scheduling resume resume request...\n");
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wantResume = true;
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#endif
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#if 0
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printf("Sending reset\n");
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g_cpu->Reset();
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// testing startup keyboard presses - perform Apple //e self-test
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//g_vm->getKeyboard()->keyDepressed(RA);
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//g_vm->Reset();
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//g_cpu->Reset();
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//((AppleVM *)g_vm)->insertDisk(0, "disks/DIAGS.DSK");
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#endif
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#if 0
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// Swap disks
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if (disk1name[0] && disk2name[0]) {
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printf("Swapping disks\n");
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printf("Inserting disk %s in drive 1\n", disk2name);
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((AppleVM *)g_vm)->insertDisk(0, disk2name);
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printf("Inserting disk %s in drive 2\n", disk1name);
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((AppleVM *)g_vm)->insertDisk(1, disk1name);
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}
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#endif
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#if 0
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MMU *mmu = g_vm->getMMU();
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printf("PC: 0x%X\n", g_cpu->pc);
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for (int i=g_cpu->pc; i<g_cpu->pc + 0x100; i++) {
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printf("0x%X ", mmu->read(i));
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}
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printf("\n");
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printf("Dropping to monitor\n");
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// drop directly to monitor.
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g_cpu->pc = 0xff69; // "call -151"
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mmu->read(0xC054); // make sure we're in page 1
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mmu->read(0xC056); // and that hires is off
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mmu->read(0xC051); // and text mode is on
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mmu->read(0xC08A); // and we have proper rom in place
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mmu->read(0xc008); // main zero-page
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mmu->read(0xc006); // rom from cards
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mmu->write(0xc002 + mmu->read(0xc014)? 1 : 0, 0xff); // make sure aux ram read and write match
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mmu->write(0x20, 0); // text window
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mmu->write(0x21, 40);
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mmu->write(0x22, 0);
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mmu->write(0x23, 24);
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mmu->write(0x33, '>');
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mmu->write(0x48, 0); // from 0xfb2f: part of text init
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*/
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#endif
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send_rst = 0;
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}
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}
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}
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int main(int argc, char *argv[])
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{
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SDL_Init(SDL_INIT_EVERYTHING);
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g_speaker = new SDLSpeaker();
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g_printer = new SDLPrinter();
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// create the filemanager - the interface to the host file system.
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g_filemanager = new SDLFileManager();
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g_display = new SDLDisplay();
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// g_displayType = m_blackAndWhite;
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// paddles have to be created after g_display created the window
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g_paddles = new SDLPaddles();
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// Next create the virtual CPU. This needs the VM's MMU in order to run, but we don't have that yet.
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g_cpu = new Cpu();
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// Create the virtual machine. This may read from g_filemanager to get ROMs if necessary.
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// (The actual Apple VM we've built has them compiled in, though.) It will create its virutal
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// hardware (MMU, video driver, floppy, paddles, whatever).
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g_vm = new AppleVM();
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g_keyboard = new SDLKeyboard(g_vm->getKeyboard());
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// Now that the VM exists and it has created an MMU, we tell the CPU how to access memory through the MMU.
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g_cpu->SetMMU(g_vm->getMMU());
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// Now that all the virtual hardware is glued together, reset the VM
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g_vm->Reset();
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g_cpu->rst();
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// g_display->blit();
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g_display->redraw();
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if (argc >= 2) {
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printf("Inserting disk %s\n", argv[1]);
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((AppleVM *)g_vm)->insertDisk(0, argv[1]);
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strcpy(disk1name, argv[1]);
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}
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if (argc == 3) {
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printf("Inserting disk %s\n", argv[2]);
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((AppleVM *)g_vm)->insertDisk(1, argv[2]);
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strcpy(disk2name, argv[2]);
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}
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// FIXME: fixed test disk...
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// ((AppleVM *)g_vm)->insertHD(0, "hd32.img");
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nonblock(NB_ENABLE);
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signal(SIGINT, sigint_handler);
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printf("creating CPU thread\n");
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if (!pthread_create(&cpuThreadID, NULL, &cpu_thread, (void *)NULL)) {
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printf("thread created\n");
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// pthread_setschedparam(cpuThreadID, SCHED_RR, PTHREAD_MAX_PRIORITY);
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}
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while (1) {
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static uint32_t usleepcycles = 16384; // step-down for display drawing. FIXME: this constant works well for *my* machine. Dynamically generate?
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static uint32_t ctr = 0;
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if (++ctr == 0) {
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printf("hit: %llu; miss: %llu; pct: %f\n", hitcount, misscount, (double)misscount / (double)(misscount + hitcount));
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}
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// fill disk buffer when needed
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((AppleVM*)g_vm)->disk6->fillDiskBuffer();
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// Make this a little friendlier, and the expense of some framerate?
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// usleep(10000);
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if (g_vm->vmdisplay->needsRedraw()) {
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AiieRect what = g_vm->vmdisplay->getDirtyRect();
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// make sure to clear the flag before drawing; there's no lock
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// on didRedraw, so the other thread might update it
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g_vm->vmdisplay->didRedraw();
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g_display->blit(what);
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}
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g_printer->update();
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g_keyboard->maintainKeyboard();
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g_display->drawBatteryStatus(100);
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// calculate FPS & dynamically step up/down as necessary
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static time_t startAt = time(NULL);
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static uint32_t loopCount = 0;
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loopCount++;
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uint32_t lenSecs = time(NULL) - startAt;
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if (lenSecs >= 5) {
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float fps = loopCount / lenSecs;
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#ifdef SHOWFPS
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char buf[25];
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sprintf(buf, "%f FPS [delay %u]", fps, usleepcycles);
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g_display->debugMsg(buf);
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#endif
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if (fps > 60) {
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usleepcycles *= 2;
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} else if (fps < 40) {
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usleepcycles /= 2;
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}
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// reset the counter & we'll adjust again in 5 seconds
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loopCount = 0;
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startAt = time(NULL);
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}
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if (usleepcycles >= 2) {
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usleep(usleepcycles);
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}
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#ifdef SHOWPC
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{
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char buf[25];
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sprintf(buf, "%X", g_cpu->pc);
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g_display->debugMsg(buf);
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}
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#endif
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#ifdef SHOWMEMPAGE
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{
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char buf[40];
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sprintf(buf, "AUX %c/%c BNK %d BSR %c/%c ZP %c 80 %c INT %c",
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g_vm->auxRamRead?'R':'_',
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g_vm->auxRamWrite?'W':'_',
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g_vm->bank1,
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g_vm->readbsr ? 'R':'_',
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g_vm->writebsr ? 'W':'_',
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g_vm->altzp ? 'Y':'_',
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g_vm->_80store ? 'Y' : '_',
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g_vm->intcxrom ? 'Y' : '_');
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g_display->debugMsg(buf);
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}
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#endif
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}
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}
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