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https://github.com/vonmillhausen/sf2000.git
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806444d2a9
This was just supposed to be a new feature for the generic image tool (dithering support), but while working on that things kind of snowballed 😅
* Added dithering support to the generic image tool and the boot logo changer, when converting images to RGB565 format. This uses a Bayer 8x8 matrix, and the overall "strength" of the dither can be controlled - it defaults to what I feel is a sane value. Dithering can help reduce banding effects due to the low colour depth in RGB565.
* Made "fix" scaling mode more flexible in the generic image tool - now there's checkboxes beside the width and height dimensions - if you un-check one, the other dimension will be calculated automatically to keep the input's aspect ratio intact
* Improved downscaling quality in the generic image tool. While working on the dithering feature, I discovered the previous "gaussian resampling" downscaling method I was using introduced distortion in certain situations. I had a lot of fun playing around with possible replacements (I tried 10 new downscaling functions!), and finally settled on a hybrid function that mixes powers-of-two downscaling (with some custom mipmap style cross-blending) with Hermite interpolation. This new method is reasonably quick, gives clean results with no great distortion, and works well with alpha channels (doesn't introduce any dark fringing)
* Generic image tool now shows the dimensions of the output image
* Added a max width on the main tool page bodies, so that they don't get so wide on full-screen desktop browsers
* Fixed a few edge-case logic bugs here and there (e.g., when upscaling only a single dimensions with the generic image tool, or places where I thought I was copying objects, but was only creating references to them, etc.)
* Switched from using "var" declarations across all tool codebases to "let" or "const" instead
* Switched out the SVG alert icons to just use emoji instead
* Various other nips and tucks (fixed up my arbitrary 80-column comment wrapping on the tools that had previously just been eye-balled, fixed a few comment typos, etc.)
113 lines
5.4 KiB
HTML
113 lines
5.4 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>Data Frog SF2000 Firmware Version Checker</title>
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<meta name="viewport" content="width=device-width">
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<link rel="stylesheet" href="tools.css">
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</head>
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<body>
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<h1>Data Frog SF2000 Firmware Version Checker</h1>
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<p>This simple tool will just check an SF2000 firmware/BIOS file against a list of known versions, and tell you which version it is. You can <a href="https://vonmillhausen.github.io/sf2000/#firmwarebios-bisrvasd">learn more about firmware revisions for the SF2000 here</a>.</p>
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<hr>
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<div id="steps">
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<section id="bisrvSection">
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<h2>Select Your <code>bisrv.asd</code></h2>
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<p>Select the <code>bisrv.asd</code> firmware file whose version you want to check. You can find the <code>bisrv.asd</code> file in the <code>bios</code> folder on your microSD card.</p>
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<div id="bisrvMessages"></div>
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<div class="controlContainer">
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<label class="control">Open <code>bisrv.asd</code>: <input id="bisrvSelector" type="file" accept=".asd" onchange="bisrvLoad(event.target.files[0])"></label>
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</div>
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</section>
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</div>
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<script src="tools.js"></script>
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<script type="text/javascript">
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// Global variables...
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let bisrvData; // Used to store the binary data from the bisrv.asd file
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// This function is triggered when the person selects a file...
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function bisrvLoad(file) {
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// Read in the contents of the selected file as array buffer...
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const frBisrv = new FileReader();
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frBisrv.readAsArrayBuffer(file);
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frBisrv.onload = function(event) {
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// Clear any old messages...
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document.getElementById("bisrvMessages").innerHTML = "";
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// Read the provided file's data into an array...
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bisrvData = new Uint8Array(event.target.result);
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// We'll do a hash-check against it...
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const hashResult = getFirmwareHash(bisrvData);
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// The result could be either a Promise if it had a bisrv.asd-like structure and we got
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// a hash, or false otherwise... let's check!
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if (hashResult instanceof Promise) {
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// We got a Promise! Wait for it to finish so we get our bisrv.asd hash...
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hashResult.then(function(dataHash) {
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// Check the hash against all the known good ones...
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switch (knownHash(dataHash)) {
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// Mid-March BIOS...
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case "03.15":
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setMessage("warning", "bisrvMessages", "Mid-March <code>bisrv.asd</code> detected. Newer firmware is available, see the link above for more information.");
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break;
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// April 20th BIOS...
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case "04.20":
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setMessage("warning", "bisrvMessages", "April 20th <code>bisrv.asd</code> detected. Newer firmware is available, see the link above for more information.");
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break;
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// May 15th BIOS...
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case "05.15":
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setMessage("warning", "bisrvMessages", "May 15th <code>bisrv.asd</code> detected. Newer firmware is available, see the link above for more information.");
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break;
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// May 22nd BIOS...
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case "05.22":
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setMessage("warning", "bisrvMessages", "Version 1.5 <code>bisrv.asd</code> detected. Newer firmware is available, see the link above for more information.");
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break;
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// August 3rd BIOS...
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case "08.03":
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setMessage("warning", "bisrvMessages", "Version 1.6 <code>bisrv.asd</code> detected. Newer firmware is available, see the link above for more information.");
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break;
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// October 7th BIOS...
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case "10.07":
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setMessage("error", "bisrvMessages", "Version 1.7 <code>bisrv.asd</code> detected. This firmware version has a critical issue with SNES save states, and is not recommended for use. See the link above for more information.");
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break;
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// October 13th BIOS...
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case "10.13":
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setMessage("info", "bisrvMessages", "Version 1.71 <code>bisrv.asd</code> detected. This is the latest known official firmware version.");
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break;
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default:
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// Huh... wasn't false so had bisrv.asd structure, but didn't return
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// a known hash... a new BIOS version? Unknown anyway!
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console.log(dataHash);
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setMessage("error", "bisrvMessages", "While the file you've selected does appear to be generally structured like the SF2000's <code>bisrv.asd</code> firmware file, the specifics of your file don't match any known SF2000 firmware version.");
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return;
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}
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});
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}
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else {
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// We got false, so whatever it was, it wasn't a bisrv.asd...
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setMessage("error", "bisrvMessages", "The file you've selected doesn't appear to have the same data structure as expected for a <code>bisrv.asd</code> file.");
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return;
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}
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};
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}
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</script>
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<hr>
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<p><a rel="license" href="https://creativecommons.org/publicdomain/zero/1.0/">CC0</a>: public domain. Version 1.3, 20240514.1</p>
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</body>
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</html>
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