You've already forked computing-box
Update to product roadmap
Signed-off-by: Alexander Lyall <alex@adcm.uk>
This commit is contained in:
55
README.md
55
README.md
@@ -1,50 +1,3 @@
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# Astro Starter Kit: Basics
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```sh
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npm create astro@latest -- --template basics
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```
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> 🧑🚀 **Seasoned astronaut?** Delete this file. Have fun!
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## 🚀 Project Structure
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Inside of your Astro project, you'll see the following folders and files:
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```text
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/
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├── public/
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│ └── favicon.svg
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├── src
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│ ├── assets
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│ │ └── astro.svg
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│ ├── components
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│ │ └── Welcome.astro
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│ ├── layouts
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│ │ └── Layout.astro
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│ └── pages
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│ └── index.astro
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└── package.json
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```
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To learn more about the folder structure of an Astro project, refer to [our guide on project structure](https://docs.astro.build/en/basics/project-structure/).
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## 🧞 Commands
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All commands are run from the root of the project, from a terminal:
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| Command | Action |
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| :------------------------ | :----------------------------------------------- |
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| `npm install` | Installs dependencies |
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| `npm run dev` | Starts local dev server at `localhost:4321` |
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| `npm run build` | Build your production site to `./dist/` |
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| `npm run preview` | Preview your build locally, before deploying |
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| `npm run astro ...` | Run CLI commands like `astro add`, `astro check` |
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| `npm run astro -- --help` | Get help using the Astro CLI |
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## 👀 Want to learn more?
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Feel free to check [our documentation](https://docs.astro.build) or jump into our [Discord server](https://astro.build/chat).
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# Computing:Box
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An evolution of Bit:Box & CS:Box to incorporate different elements of the UK Computing Curriculum
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@@ -68,9 +21,13 @@ An evolution of Bit:Box & CS:Box to incorporate different elements of the UK Com
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- [X] XOR Gate Simulator
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- [X] XNOR Gate Simulator
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### Wave 3 CS:Box Features (TBC)
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### Wave 3 CS:Box Features (Spring 2026)
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- [X] Two's Compliment Simulator
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- [ ] Extended Binary Simulator (Custom bit sizes)
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- [ ] Unified Binary Simulator (Unsigned & Two's Completment combined)
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- [ ] Enhanced Gate Simulator (Truth Table Creator)
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- [ ] Compound Gate Simulator
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- [ ] Two's Compliment Simulator
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- [ ] Computer Components Simulator
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## Version 1.0 Release Date: 1<sup>st</sup> September 2025
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## Version 2.0 Release Date (Goal): 1<sup>st</sup> February 2025
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@@ -1,17 +1,26 @@
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---
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const bitLabels = [128, 64, 32, 16, 8, 4, 2, 1];
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/**
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* src/pages/binary.astro
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* Single-file binary simulator (Unsigned + Two's complement)
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* Bit width: 4..64
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*
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* Requires:
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* public/fonts/DSEG7Classic-Regular.woff
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* public/fonts/DSEG7Classic-Regular.ttf
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*/
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---
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<html lang="en">
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<head>
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<meta charset="utf-8" />
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<meta name="viewport" content="width=device-width,initial-scale=1" />
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<title>Unsigned Binary | Computing:Box</title>
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<title>Binary | Computing:Box</title>
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<style>
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:root{
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--bg: #1f2027;
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--panel: #22242d;
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--panel2:#262833;
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--text: #e8e8ee;
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--muted: #a9acb8;
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--accent: #33ff7a;
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@@ -19,12 +28,11 @@ const bitLabels = [128, 64, 32, 16, 8, 4, 2, 1];
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--line: rgba(255,255,255,.12);
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}
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/* DSEG7ClassicRegular font */
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@font-face{
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font-family: "DSEG7ClassicRegular";
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src:
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url("/fonts/DSEG7Classic-Regular.ttf") format("truetype"),
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url("/fonts/DSEG7Classic-Regular.woff") format("woff");
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url("/fonts/DSEG7Classic-Regular.woff") format("woff"),
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url("/fonts/DSEG7Classic-Regular.ttf") format("truetype");
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font-weight: 400;
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font-style: normal;
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font-display: swap;
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@@ -43,15 +51,15 @@ const bitLabels = [128, 64, 32, 16, 8, 4, 2, 1];
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padding: 32px 20px 60px;
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}
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.top{
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/* Layout: readout left, settings panel right (like your screenshot) */
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.layout{
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display:grid;
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grid-template-columns: 1fr;
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grid-template-columns: 1fr 360px;
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gap: 22px;
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align-items:start;
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}
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.readout{
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background: transparent;
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text-align:center;
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padding: 10px 10px 0;
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}
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@@ -65,7 +73,6 @@ const bitLabels = [128, 64, 32, 16, 8, 4, 2, 1];
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margin-top: 8px;
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}
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/* All numbers use DSEG */
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.num{
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font-family: "DSEG7ClassicRegular", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
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font-weight: 400;
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@@ -74,17 +81,18 @@ const bitLabels = [128, 64, 32, 16, 8, 4, 2, 1];
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}
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.value{
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font-size: 64px;
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font-size: 70px;
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line-height: 1.0;
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margin: 6px 0 16px;
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}
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.binary{
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font-size: 44px;
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font-size: 54px;
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letter-spacing: .12em;
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word-break: break-all;
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}
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/* Buttons now UNDER the readout */
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/* Buttons under readout (as requested) */
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.controls{
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margin-top: 16px;
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display:flex;
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@@ -105,53 +113,42 @@ const bitLabels = [128, 64, 32, 16, 8, 4, 2, 1];
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}
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.btn:active{ transform: translateY(1px); }
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.bits{
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margin-top: 34px;
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padding-top: 26px;
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border-top: 1px solid var(--line);
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display:grid;
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grid-template-columns: repeat(8, 1fr);
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gap: 18px;
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align-items:end;
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text-align:center;
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/* Settings panel cards */
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.panel{
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background: rgba(255,255,255,.04);
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border: 1px solid rgba(255,255,255,.10);
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border-radius: 14px;
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padding: 16px 16px 14px;
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margin-bottom: 14px;
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}
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.bit{
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.panelTitle{
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font-size: 12px;
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letter-spacing: .16em;
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text-transform: uppercase;
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color: var(--muted);
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font-weight: 800;
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margin-bottom: 10px;
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}
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.panelRow{
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display:flex;
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flex-direction:column;
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align-items:center;
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gap: 10px;
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padding: 8px 4px;
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justify-content:space-between;
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gap: 12px;
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}
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.hint{
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color: var(--muted);
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font-size: 12px;
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margin-top: 10px;
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line-height: 1.35;
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}
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.bitVal{
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font-size: 34px;
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color: var(--text);
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opacity: .95;
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}
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/* Bulb */
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.bulb{
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width: 22px;
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height: 22px;
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border-radius: 50%;
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background: rgba(255,255,255,.08);
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border: 1px solid rgba(255,255,255,.12);
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box-shadow: none;
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margin-bottom: 6px;
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}
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.bulb.on{
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background: #ffd86b;
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border-color: rgba(255,216,107,.7);
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box-shadow: 0 0 18px rgba(255,216,107,.6);
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}
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/* Light switch */
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/* Reusable toggle switch (for MODE and for each BIT) */
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.switch{
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position: relative;
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width: 56px;
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height: 34px;
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display:inline-block;
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flex: 0 0 auto;
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}
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.switch input{
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opacity:0;
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@@ -186,141 +183,460 @@ const bitLabels = [128, 64, 32, 16, 8, 4, 2, 1];
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background: var(--accent);
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}
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/* Bit width controls */
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.bwControls{
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display:grid;
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grid-template-columns: 44px 1fr 44px;
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gap: 10px;
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align-items:center;
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margin-top: 8px;
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}
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.bwBtn{
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width: 44px;
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height: 44px;
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border-radius: 12px;
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border: 1px solid rgba(255,255,255,.14);
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background: rgba(255,255,255,.06);
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color: #fff;
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font-weight: 900;
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cursor: pointer;
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}
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.bwBtn:active{ transform: translateY(1px); }
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.bwInput{
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display:flex;
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align-items:center;
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justify-content:space-between;
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gap: 12px;
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background: rgba(255,255,255,.05);
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border: 1px solid rgba(255,255,255,.12);
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border-radius: 12px;
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padding: 10px 12px;
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}
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.bwLabel{
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color: var(--muted);
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font-size: 12px;
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letter-spacing: .14em;
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text-transform: uppercase;
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font-weight: 800;
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}
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.bwField{
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width: 100px;
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text-align:right;
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background: transparent;
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border: none;
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outline: none;
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color: var(--accent);
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font-family: "DSEG7ClassicRegular", ui-monospace, monospace;
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font-size: 26px;
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padding: 0;
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}
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.bwField::-webkit-outer-spin-button,
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.bwField::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
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.bwField[type=number] { -moz-appearance: textfield; }
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/* Bits grid */
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.bits{
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margin-top: 34px;
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padding-top: 26px;
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border-top: 1px solid var(--line);
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display:grid;
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gap: 18px;
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align-items:end;
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text-align:center;
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}
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.bit{
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display:flex;
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flex-direction:column;
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align-items:center;
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gap: 10px;
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padding: 8px 4px;
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}
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.bitVal{
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font-size: 34px;
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color: var(--text);
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opacity: .95;
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}
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/* Bulb (must come back!) */
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.bulb{
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width: 22px;
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height: 22px;
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border-radius: 50%;
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background: rgba(255,255,255,.08);
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border: 1px solid rgba(255,255,255,.12);
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box-shadow: none;
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margin-bottom: 6px;
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}
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.bulb.on{
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background: #ffd86b;
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border-color: rgba(255,216,107,.7);
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box-shadow: 0 0 18px rgba(255,216,107,.6);
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}
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/* Responsive */
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@media (max-width: 1000px){
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.layout{ grid-template-columns: 1fr; }
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.value{ font-size: 60px; }
|
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.binary{ font-size: 44px; }
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}
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@media (max-width: 900px){
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.bits{ grid-template-columns: repeat(4, 1fr); }
|
||||
.value{ font-size: 54px; }
|
||||
.binary{ font-size: 36px; }
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||||
.btn{ min-width: 140px; }
|
||||
}
|
||||
</style>
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</head>
|
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|
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<body>
|
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<main class="wrap">
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<section class="top">
|
||||
<div class="readout">
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||||
<div class="label">Denary</div>
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||||
<div id="denaryNumber" class="value num">0</div>
|
||||
<section class="layout">
|
||||
<!-- LEFT: readout + buttons -->
|
||||
<div>
|
||||
<div class="readout">
|
||||
<div class="label">Denary</div>
|
||||
<div id="denaryNumber" class="value num">0</div>
|
||||
|
||||
<div class="label">Binary</div>
|
||||
<div id="binaryNumber" class="value binary num">00000000</div>
|
||||
<div class="label">Binary</div>
|
||||
<div id="binaryNumber" class="value binary num">00000000</div>
|
||||
|
||||
<!-- Buttons moved HERE (underneath) -->
|
||||
<div class="controls">
|
||||
<button class="btn" id="btnCustomBinary" type="button">Custom Binary</button>
|
||||
<button class="btn" id="btnCustomDenary" type="button">Custom Denary</button>
|
||||
<button class="btn" id="btnShiftLeft" type="button">Left Shift</button>
|
||||
<button class="btn" id="btnShiftRight" type="button">Right Shift</button>
|
||||
<div class="controls">
|
||||
<button class="btn" id="btnCustomBinary" type="button">Custom Binary</button>
|
||||
<button class="btn" id="btnCustomDenary" type="button">Custom Denary</button>
|
||||
<button class="btn" id="btnShiftLeft" type="button">Left Shift</button>
|
||||
<button class="btn" id="btnShiftRight" type="button">Right Shift</button>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
<!-- Bits grid (built by JS so bit-width 4..64 works) -->
|
||||
<section id="bitsGrid" class="bits" aria-label="Bit switches"></section>
|
||||
</div>
|
||||
</section>
|
||||
|
||||
<section class="bits" aria-label="Bit switches">
|
||||
{bitLabels.map((v) => (
|
||||
<div class="bit">
|
||||
<div class="bulb" id={`bulb-${v}`} aria-hidden="true"></div>
|
||||
<!-- RIGHT: settings panel -->
|
||||
<aside>
|
||||
<div class="panel">
|
||||
<div class="panelTitle">Mode</div>
|
||||
<div class="panelRow">
|
||||
<span style="font-weight:800;">Unsigned</span>
|
||||
|
||||
<!-- bit place value is a number too -->
|
||||
<div class="bitVal num">{v}</div>
|
||||
<!-- MODE TOGGLE uses SAME switch style -->
|
||||
<label class="switch" aria-label="Toggle Two's complement mode">
|
||||
<input id="modeToggle" type="checkbox" />
|
||||
<span class="slider"></span>
|
||||
</label>
|
||||
|
||||
<label class="switch" aria-label={`Toggle bit ${v}`}>
|
||||
<input type="checkbox" data-bit={v} />
|
||||
<span class="slider"></span>
|
||||
</label>
|
||||
<span style="font-weight:800;">Two’s complement</span>
|
||||
</div>
|
||||
<div class="hint">
|
||||
Tip: In two’s complement, the left-most bit (MSB) represents a negative value.
|
||||
</div>
|
||||
</div>
|
||||
))}
|
||||
|
||||
<div class="panel">
|
||||
<div class="panelTitle">Bit width</div>
|
||||
|
||||
<div class="bwControls">
|
||||
<button class="bwBtn" id="btnBitsDown" type="button" aria-label="Decrease bits">−</button>
|
||||
|
||||
<div class="bwInput">
|
||||
<div class="bwLabel">Bits</div>
|
||||
<input
|
||||
id="bitsField"
|
||||
class="bwField"
|
||||
type="number"
|
||||
min="4"
|
||||
max="64"
|
||||
step="1"
|
||||
value="8"
|
||||
inputmode="numeric"
|
||||
/>
|
||||
</div>
|
||||
|
||||
<button class="bwBtn" id="btnBitsUp" type="button" aria-label="Increase bits">+</button>
|
||||
</div>
|
||||
|
||||
<div class="hint">
|
||||
Minimum 4 bits, maximum 64 bits.
|
||||
</div>
|
||||
</div>
|
||||
</aside>
|
||||
</section>
|
||||
</main>
|
||||
|
||||
<script type="module">
|
||||
const bitLabels = [128, 64, 32, 16, 8, 4, 2, 1];
|
||||
const bits = new Map(bitLabels.map(v => [v, false]));
|
||||
// ---------- State ----------
|
||||
let bitsCount = 8; // 4..64
|
||||
let isTwos = false; // false = unsigned
|
||||
let bitStates = []; // MSB -> LSB booleans
|
||||
|
||||
function updateReadout(){
|
||||
let denary = 0;
|
||||
let binary = "";
|
||||
// ---------- Helpers ----------
|
||||
function clamp(n, min, max){ return Math.min(max, Math.max(min, n)); }
|
||||
|
||||
for (const v of bitLabels){
|
||||
const on = bits.get(v);
|
||||
if (on) denary += v;
|
||||
binary += on ? "1" : "0";
|
||||
const bulb = document.getElementById(`bulb-${v}`);
|
||||
if (bulb) bulb.classList.toggle("on", on);
|
||||
}
|
||||
|
||||
document.getElementById("denaryNumber").innerText = denary.toString();
|
||||
document.getElementById("binaryNumber").innerText = binary;
|
||||
function pow2(n){
|
||||
// for up to 64 bits, Number is still OK for *visual simulator*.
|
||||
// if you later want exact 64-bit maths, swap to BigInt end-to-end.
|
||||
return 2 ** n;
|
||||
}
|
||||
|
||||
function getPlaceValues(){
|
||||
// MSB -> LSB
|
||||
// Unsigned: [2^(n-1), ..., 1]
|
||||
// Two's: [-2^(n-1), 2^(n-2), ..., 1]
|
||||
const vals = [];
|
||||
for (let i = 0; i < bitsCount; i++){
|
||||
const power = bitsCount - 1 - i;
|
||||
if (isTwos && i === 0){
|
||||
vals.push(-pow2(power));
|
||||
} else {
|
||||
vals.push(pow2(power));
|
||||
}
|
||||
}
|
||||
return vals;
|
||||
}
|
||||
|
||||
function binaryString(){
|
||||
return bitStates.map(b => (b ? "1" : "0")).join("");
|
||||
}
|
||||
|
||||
function denaryValue(){
|
||||
const values = getPlaceValues();
|
||||
let sum = 0;
|
||||
for (let i = 0; i < bitsCount; i++){
|
||||
if (bitStates[i]) sum += values[i];
|
||||
}
|
||||
return sum;
|
||||
}
|
||||
|
||||
function rangeForMode(){
|
||||
if (!isTwos){
|
||||
return { min: 0, max: pow2(bitsCount) - 1 };
|
||||
}
|
||||
return { min: -pow2(bitsCount - 1), max: pow2(bitsCount - 1) - 1 };
|
||||
}
|
||||
|
||||
function updateReadout(){
|
||||
document.getElementById("binaryNumber").innerText = binaryString();
|
||||
document.getElementById("denaryNumber").innerText = String(denaryValue());
|
||||
|
||||
// bulb on/off updates:
|
||||
for (let i = 0; i < bitsCount; i++){
|
||||
const bulb = document.getElementById(`bulb-${i}`);
|
||||
if (bulb) bulb.classList.toggle("on", !!bitStates[i]);
|
||||
}
|
||||
}
|
||||
|
||||
// ---------- DOM build for bits grid ----------
|
||||
function setBitsGridColumns(){
|
||||
const grid = document.getElementById("bitsGrid");
|
||||
// make it adapt (up to 16 per row max, then wraps)
|
||||
const cols = clamp(bitsCount, 4, 16);
|
||||
grid.style.gridTemplateColumns = `repeat(${cols}, 1fr)`;
|
||||
}
|
||||
|
||||
function buildBitsGrid(){
|
||||
const grid = document.getElementById("bitsGrid");
|
||||
grid.innerHTML = "";
|
||||
|
||||
setBitsGridColumns();
|
||||
|
||||
const values = getPlaceValues();
|
||||
|
||||
for (let i = 0; i < bitsCount; i++){
|
||||
const v = values[i];
|
||||
|
||||
const bit = document.createElement("div");
|
||||
bit.className = "bit";
|
||||
|
||||
const bulb = document.createElement("div");
|
||||
bulb.className = "bulb";
|
||||
bulb.id = `bulb-${i}`;
|
||||
bulb.setAttribute("aria-hidden", "true");
|
||||
|
||||
const val = document.createElement("div");
|
||||
val.className = "bitVal num";
|
||||
// show absolute label for MSB in twos? No — show the actual negative value (clear to students).
|
||||
val.textContent = String(v);
|
||||
|
||||
// IMPORTANT: bit switch must be the SAME style as MODE switch
|
||||
const label = document.createElement("label");
|
||||
label.className = "switch";
|
||||
label.setAttribute("aria-label", `Toggle bit ${v}`);
|
||||
|
||||
const input = document.createElement("input");
|
||||
input.type = "checkbox";
|
||||
input.dataset.index = String(i);
|
||||
input.checked = !!bitStates[i];
|
||||
|
||||
const slider = document.createElement("span");
|
||||
slider.className = "slider";
|
||||
|
||||
input.addEventListener("change", () => {
|
||||
bitStates[i] = input.checked;
|
||||
updateReadout();
|
||||
});
|
||||
|
||||
label.appendChild(input);
|
||||
label.appendChild(slider);
|
||||
|
||||
bit.appendChild(bulb);
|
||||
bit.appendChild(val);
|
||||
bit.appendChild(label);
|
||||
grid.appendChild(bit);
|
||||
}
|
||||
|
||||
updateReadout();
|
||||
}
|
||||
|
||||
// ---------- Set state from binary / denary ----------
|
||||
function setFromBinary(bin){
|
||||
const clean = bin.replace(/\s+/g, "");
|
||||
const clean = String(bin).replace(/\s+/g, "");
|
||||
if (!/^[01]+$/.test(clean)) return false;
|
||||
|
||||
const padded = clean.slice(-8).padStart(8, "0");
|
||||
[...padded].forEach((ch, i) => {
|
||||
const v = bitLabels[i];
|
||||
const on = ch === "1";
|
||||
bits.set(v, on);
|
||||
const input = document.querySelector(`input[data-bit="${v}"]`);
|
||||
if (input) input.checked = on;
|
||||
});
|
||||
const padded = clean.slice(-bitsCount).padStart(bitsCount, "0");
|
||||
bitStates = [...padded].map(ch => ch === "1");
|
||||
|
||||
// update toggles without rebuilding
|
||||
for (let i = 0; i < bitsCount; i++){
|
||||
const toggle = document.querySelector(`input[type="checkbox"][data-index="${i}"]`);
|
||||
if (toggle) toggle.checked = bitStates[i];
|
||||
}
|
||||
updateReadout();
|
||||
return true;
|
||||
}
|
||||
|
||||
function setFromDenary(n){
|
||||
n = Number(n);
|
||||
if (!Number.isInteger(n) || n < 0 || n > 255) return false;
|
||||
const num = Number(n);
|
||||
if (!Number.isInteger(num)) return false;
|
||||
|
||||
for (const v of bitLabels){
|
||||
const on = n >= v;
|
||||
bits.set(v, on);
|
||||
if (on) n -= v;
|
||||
const { min, max } = rangeForMode();
|
||||
if (num < min || num > max) return false;
|
||||
|
||||
const input = document.querySelector(`input[data-bit="${v}"]`);
|
||||
if (input) input.checked = on;
|
||||
// convert to bit pattern
|
||||
let unsignedVal;
|
||||
if (!isTwos){
|
||||
unsignedVal = num;
|
||||
} else {
|
||||
// two's complement representation
|
||||
unsignedVal = num < 0 ? (pow2(bitsCount) + num) : num;
|
||||
}
|
||||
|
||||
// build MSB->LSB bits from unsignedVal
|
||||
const newBits = [];
|
||||
for (let i = 0; i < bitsCount; i++){
|
||||
const power = bitsCount - 1 - i;
|
||||
const bit = Math.floor(unsignedVal / pow2(power)) % 2;
|
||||
newBits.push(bit === 1);
|
||||
}
|
||||
bitStates = newBits;
|
||||
|
||||
for (let i = 0; i < bitsCount; i++){
|
||||
const toggle = document.querySelector(`input[type="checkbox"][data-index="${i}"]`);
|
||||
if (toggle) toggle.checked = bitStates[i];
|
||||
}
|
||||
updateReadout();
|
||||
return true;
|
||||
}
|
||||
|
||||
// ---------- Shifts ----------
|
||||
function shiftLeft(){
|
||||
const bin = document.getElementById("binaryNumber").innerText;
|
||||
setFromBinary(bin.slice(1) + "0");
|
||||
// logical left shift: drop MSB, add 0 at LSB
|
||||
bitStates = bitStates.slice(1).concat(false);
|
||||
buildBitsGrid(); // rebuild keeps labels correct if mode changed (also updates bulbs)
|
||||
}
|
||||
|
||||
function shiftRight(){
|
||||
const bin = document.getElementById("binaryNumber").innerText;
|
||||
setFromBinary("0" + bin.slice(0, -1));
|
||||
if (!isTwos){
|
||||
// logical right shift
|
||||
bitStates = [false].concat(bitStates.slice(0, -1));
|
||||
} else {
|
||||
// arithmetic right shift (preserve MSB)
|
||||
const msb = bitStates[0];
|
||||
bitStates = [msb].concat(bitStates.slice(0, -1));
|
||||
}
|
||||
buildBitsGrid();
|
||||
}
|
||||
|
||||
// switches
|
||||
document.querySelectorAll('input[type="checkbox"][data-bit]').forEach(input => {
|
||||
input.addEventListener("change", () => {
|
||||
const v = Number(input.dataset.bit);
|
||||
bits.set(v, input.checked);
|
||||
updateReadout();
|
||||
// ---------- Bit width ----------
|
||||
function applyBitsCount(next){
|
||||
const wanted = clamp(Number(next) || 8, 4, 64);
|
||||
if (wanted === bitsCount) return;
|
||||
|
||||
// keep the right-most (LSB) bits when resizing (feels natural)
|
||||
const old = binaryString();
|
||||
bitsCount = wanted;
|
||||
|
||||
// rebuild state from old binary, keeping LSBs
|
||||
const padded = old.slice(-bitsCount).padStart(bitsCount, "0");
|
||||
bitStates = [...padded].map(ch => ch === "1");
|
||||
|
||||
document.getElementById("bitsField").value = String(bitsCount);
|
||||
buildBitsGrid();
|
||||
}
|
||||
|
||||
// ---------- Mode toggle ----------
|
||||
function applyMode(nextIsTwos){
|
||||
const prevDenary = denaryValue(); // keep the *value* if possible
|
||||
isTwos = !!nextIsTwos;
|
||||
|
||||
// Try to keep the denary value, but clamp if it becomes invalid in the new mode
|
||||
const { min, max } = rangeForMode();
|
||||
const kept = clamp(prevDenary, min, max);
|
||||
setFromDenary(kept);
|
||||
|
||||
buildBitsGrid();
|
||||
}
|
||||
|
||||
// ---------- Wire up UI ----------
|
||||
function wireUI(){
|
||||
document.getElementById("btnShiftLeft").addEventListener("click", shiftLeft);
|
||||
document.getElementById("btnShiftRight").addEventListener("click", shiftRight);
|
||||
|
||||
document.getElementById("btnCustomBinary").addEventListener("click", () => {
|
||||
const val = prompt(`Enter a binary number (up to ${bitsCount} bits):`);
|
||||
if (val === null) return;
|
||||
if (!setFromBinary(val)) alert("Invalid input. Use only 0 and 1.");
|
||||
});
|
||||
});
|
||||
|
||||
// buttons
|
||||
document.getElementById("btnShiftLeft").addEventListener("click", shiftLeft);
|
||||
document.getElementById("btnShiftRight").addEventListener("click", shiftRight);
|
||||
document.getElementById("btnCustomDenary").addEventListener("click", () => {
|
||||
const { min, max } = rangeForMode();
|
||||
const val = prompt(`Enter a denary number (${min} to ${max}):`);
|
||||
if (val === null) return;
|
||||
if (!setFromDenary(val)) alert(`Invalid input. Enter an integer from ${min} to ${max}.`);
|
||||
});
|
||||
|
||||
document.getElementById("btnCustomBinary").addEventListener("click", () => {
|
||||
const val = prompt("Enter an 8-bit binary number (e.g. 01011001):");
|
||||
if (val === null) return;
|
||||
if (!setFromBinary(val)) alert("Invalid input. Use only 0 and 1 (up to 8 digits).");
|
||||
});
|
||||
// Mode toggle
|
||||
const modeToggle = document.getElementById("modeToggle");
|
||||
modeToggle.addEventListener("change", () => applyMode(modeToggle.checked));
|
||||
|
||||
document.getElementById("btnCustomDenary").addEventListener("click", () => {
|
||||
const val = prompt("Enter a denary number (0 to 255):");
|
||||
if (val === null) return;
|
||||
if (!setFromDenary(val)) alert("Invalid input. Enter an integer from 0 to 255.");
|
||||
});
|
||||
// Bit width +/- and manual entry
|
||||
document.getElementById("btnBitsDown").addEventListener("click", () => applyBitsCount(bitsCount - 1));
|
||||
document.getElementById("btnBitsUp").addEventListener("click", () => applyBitsCount(bitsCount + 1));
|
||||
|
||||
updateReadout();
|
||||
const bitsField = document.getElementById("bitsField");
|
||||
bitsField.addEventListener("change", () => applyBitsCount(bitsField.value));
|
||||
bitsField.addEventListener("blur", () => applyBitsCount(bitsField.value));
|
||||
bitsField.addEventListener("keydown", (e) => {
|
||||
if (e.key === "Enter") applyBitsCount(bitsField.value);
|
||||
});
|
||||
}
|
||||
|
||||
// ---------- Init ----------
|
||||
function init(){
|
||||
// default: 8-bit unsigned
|
||||
bitsCount = 8;
|
||||
isTwos = false;
|
||||
bitStates = Array(bitsCount).fill(false);
|
||||
|
||||
document.getElementById("modeToggle").checked = false;
|
||||
document.getElementById("bitsField").value = String(bitsCount);
|
||||
|
||||
wireUI();
|
||||
buildBitsGrid();
|
||||
}
|
||||
|
||||
init();
|
||||
</script>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
Reference in New Issue
Block a user