examples/async_load.html

<!doctype html>
<title>Asynchronous loading of disk images</title>

<script src="../build/libv86.js"></script>
<script>
"use strict";

window.onload = function()
{
    // Async loading of the iso image
    // Note how the emulation starts without downloading the 50MB image

    // Support of the "Range: bytes=..." header is required on the server, CORS
    // is required if the server is on a different host

    var emulator = new V86({
        wasm_path: "../build/v86.wasm",
        memory_size: 64 * 1024 * 1024,
        vga_memory_size: 2 * 1024 * 1024,
        screen_container: document.getElementById("screen_container"),
        bios: {
            url: "../bios/seabios.bin",
        },
        vga_bios: {
            url: "../bios/vgabios.bin",
        },
        cdrom: {
            url: "../images/dsl-4.11.rc2.iso",
            async: true,

            // size can be determined automatically, but costs an extra request
            // and might not work reliably
            size: 52824064,
        },
        autostart: true,
    });
}
</script>

<div id="screen_container">
    <div style="white-space: pre; font: 14px monospace; line-height: 14px"></div>
    <canvas style="display: none"></canvas>
</div>