69 lines
2.0 KiB
JavaScript
69 lines
2.0 KiB
JavaScript
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import * as Emulator from './moa-genesis.js';
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function initialize_emulator() {
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let host = Emulator.new_host();
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let system = Emulator.load_system(host, Emulator.get_load_system_fn());
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let last_update = performance.now();
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setTimeout(function refreshFrame() {
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let current = performance.now();
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let diff = current - last_update;
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//let remaining = Math.max((16 * Emulator.get_speed()) - diff, 0);
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last_update = current;
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let runtime = Emulator.run_system_for(system, diff * 1_000_000);
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if (Emulator.is_running()) {
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let remaining = Math.max(diff - runtime - (diff * 0.1), 1);
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setTimeout(refreshFrame, remaining);
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}
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}, 0);
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Emulator.host_run_loop(host);
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}
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window.addEventListener("load", () => {
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Emulator.default();
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});
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// Load a new ROM file
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var reader = new FileReader();
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reader.onloadend = function (e) {
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var data = new Uint8Array(reader.result);
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// If the SMD file magic number is present, then convert it before loading
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if (data[8] == 0xAA && data[9] == 0xBB)
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data = Emulator.smd_to_bin(data);
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Emulator.set_rom_data(data);
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};
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var file_input = document.getElementById("rom-file");
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file_input.addEventListener("change", e => {
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document.getElementById("video").focus();
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reader.readAsArrayBuffer(file_input.files[0])
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});
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document.getElementById("reset").addEventListener("click", () => {
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document.getElementById("video").focus();
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Emulator.request_stop();
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});
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document.getElementById("power").addEventListener("click", () => {
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document.getElementById("video").focus();
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if (Emulator.is_running())
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Emulator.request_stop();
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else
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initialize_emulator();
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});
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document.getElementById("speed").addEventListener("change", (e) => {
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document.getElementById("video").focus();
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Emulator.set_speed(e.target.value);
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});
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// Update the frame rate display
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var frame_rate_el = document.getElementById("frame-rate");
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var frame_rate = setInterval(function () {
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frame_rate_el.value = Emulator.get_frames_since();
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}, 1000);
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