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Handle prelude loading message in JS rather than Forth

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This commit is contained in:
Camden Dixie O'Brien
2026-03-20 12:53:33 +00:00
parent 36429bf8bc
commit 2c13ad4e1f
4 changed files with 52 additions and 46 deletions
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35
emu.js
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@@ -6,6 +6,7 @@ const RXHEAD = 0x108;
const RXTAIL = 0x10c;
const SYSREADY = 0x110;
const SYSINTER = 0x114;
const DOT_INTERVAL_MS = 120;
const PERIPHS_SIZE = 0x200;
@@ -50,14 +51,18 @@ class Emulator {
document.addEventListener('keydown', (e) => this.handle_keydown(e));
window.addEventListener('resize', () => this.handle_resize());
this.forth = new Worker('boot.js', { type: 'module' });
this.print("Assembling kernel ");
const dots = setInterval(() => this.print("."), DOT_INTERVAL_MS);
this.worker = new Worker('boot.js', { type: 'module' });
this.worker.postMessage({ type: "load", mem: this.mem });
this.worker.onmessage = (e) => {
clearInterval(dots);
this.dots = setInterval(() => this.print("."), DOT_INTERVAL_MS);
this.forth.postMessage({ type: "load", mem: this.mem });
this.forth.onmessage = (e) => {
clearInterval(this.dots);
this.print(" done\n");
this.worker.postMessage({ type: "boot" });
this.print("Loading prelude ");
this.forth.postMessage({ type: "boot" });
this.dots = setInterval(() => this.print("."), DOT_INTERVAL_MS);
};
fetch('prelude.f')
@@ -84,9 +89,15 @@ class Emulator {
if (!this.input_enable) {
const sysready = Atomics.load(this.mem_u8, SYSREADY);
if (sysready != 0) {
clearInterval(this.dots);
this.print(" done\n");
Atomics.store(this.mem_u8, SYSINTER, 1);
Atomics.notify(this.mem_i32, SYSINTER / 4);
this.input_enable = true;
this.blink = true;
this.flush_output();
document.getElementById('cursor').classList.add('blinking');
}
}
}
@@ -180,12 +191,14 @@ class Emulator {
}
e.preventDefault();
this.blink = false;
this.flush_output();
document.getElementById('cursor').classList.remove('blinking');
if (this.idle_timer)
clearTimeout(this.idle_timer);
this.idle_timer = setTimeout(() => {
this.blink = true;
document.getElementById('cursor').classList.add('blinking');
}, CURSOR_IDLE_TIME_MS);
}
@@ -272,10 +285,12 @@ class Emulator {
return row.map((c, x) => {
const ec = this.html_escape(c);
if (this.input_enable
&& x == this.cursor.x && y == this.cursor.y)
return '<span id="cursor">' + ec + '</span>';
else
&& x == this.cursor.x && y == this.cursor.y) {
const cl = this.blink ? 'class="blinking"' : '';
return `<span id="cursor" ${cl}>` + ec + '</span>';
} else {
return ec;
}
}).join('').trimEnd();
}).join('\n');
this.output.innerHTML = html;