160 lines
3.1 KiB
C++
160 lines
3.1 KiB
C++
// (C) 2018-2022 by Folkert van Heusden
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// Released under Apache License v2.0
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#include <FastLED.h>
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#include <string.h>
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#include <unistd.h>
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#include "memory.h"
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#include "cpu.h"
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#include "tty.h"
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#include "utils.h"
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#include "error.h"
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#define NEOPIXELS_PIN 27
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bus *b = nullptr;
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cpu *c = nullptr;
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tty *tty_ = nullptr;
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uint16_t exec_addr = 0;
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uint32_t start_ts = 0;
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void setBootLoader(bus *const b) {
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cpu *const c = b->getCpu();
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const uint16_t offset = 01000;
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constexpr uint16_t bootrom[] = {
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0012700,
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0177406,
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0012710,
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0177400,
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0012740,
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0000005,
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0105710,
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0100376,
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0005007
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};
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for(size_t i=0; i<sizeof bootrom / 2; i++)
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b->writeWord(offset + i * 2, bootrom[i]);
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c->setRegister(7, offset);
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}
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void panel(void *p) {
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bus *const b = reinterpret_cast<bus *>(p);
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cpu *const c = b->getCpu();
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CRGB leds[1]; // FIXME 1: aantal leds, zie ook v
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FastLED.addLeds<NEOPIXEL, NEOPIXELS_PIN>(leds, 1);
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for(;;) {
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vTaskDelay(100 / portTICK_RATE_MS);
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uint16_t current_pc = c->getPC();
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leds[0] = current_pc & (1 << 5) ? CRGB::Red : CRGB::Black;
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FastLED.show();
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}
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}
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void setup() {
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Serial.begin(115200);
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Serial.println(F("This PDP-11 emulator is called \"kek\" (reason for that is forgotten) and was written by Folkert van Heusden."));
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Serial.print(F("Size of int: "));
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Serial.println(sizeof(int));
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Serial.print(F("CPU clock frequency (MHz): "));
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Serial.println(getCpuFrequencyMhz());
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Serial.print(F("Free RAM before init (decimal bytes): "));
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Serial.println(ESP.getFreeHeap());
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Serial.println(F("Init bus"));
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b = new bus();
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Serial.println(F("Init CPU"));
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c = new cpu(b);
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Serial.println(F("Connect CPU to BUS"));
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b->add_cpu(c);
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c->setEmulateMFPT(true);
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Serial.println(F("Init TTY"));
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tty_ = new tty(false);
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Serial.println(F("Connect TTY to bus"));
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b->add_tty(tty_);
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Serial.println(F("Load RK05"));
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b->add_rk05(new rk05("", b));
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setBootLoader(b);
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Serial.print(F("Free RAM after init: "));
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Serial.println(ESP.getFreeHeap());
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pinMode(LED_BUILTIN, OUTPUT);
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Serial.flush();
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Serial.print(F("Starting panel (on CPU 0, main emulator runs on CPU "));
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Serial.print(xPortGetCoreID());
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Serial.println(F(")"));
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xTaskCreatePinnedToCore(&panel, "panel", 2048, b, 5, nullptr, 0);
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Serial.println(F("Press <enter> to start"));
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for(;;) {
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if (Serial.available()) {
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int c = Serial.read();
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if (c == 13 || c == 10)
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break;
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}
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delay(1);
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}
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Serial.println(F("Emulation starting!"));
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start_ts = millis();
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}
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uint32_t icount = 0;
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void loop() {
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icount++;
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if ((icount & 1023) == 0) {
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if (Serial.available()) {
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char c = Serial.read();
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if (c == 5) {
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Serial.print(F("Instructions per second: "));
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Serial.println(icount * 1000.0 / (millis() - start_ts));
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}
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else if (c > 0 && c < 127) {
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tty_->sendChar(c);
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}
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}
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}
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if (c->step()) {
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Serial.println(F(""));
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Serial.println(F(" *** EMULATION STOPPED *** "));
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Serial.print(F("Instructions per second: "));
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Serial.println(icount * 1000.0 / (millis() - start_ts));
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delay(3000);
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Serial.println(F(" *** EMULATION RESTARTING *** "));
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c->setRegister(7, exec_addr);
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c->resetHalt();
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start_ts = millis();
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icount = 0;
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}
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}
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