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CSTroN

CSTN was once popular among low-end laptops and cellphones, and its predecessor, STN was almost the only viable option for laptop before TFT LCD was invented. Thanks to the advance of technology, they are fully replaced with TFT LCD. But just for fun, how would software and games today look like on a 90s CSTN LCD?

Basically, this project aims to build an LCD monitor based around a CSTN screen (specifically SX21V004, but once done, it is easy to adapt other panels).

This task would be easy for normal TFT LCDs, one would just need to buy the screen, the driver board, and optionally a case, assemble them together, done. Though one may build driver board and/or case yourself, but given they are easy to find and very affordable, there is not many reasons to build by oneself.

But the story is quite different for CSTN. Most of the large (>3") CSTNs use a very different interface than TFT LCD, making it impossible to connect them to normal driver board designed for TFT LCDs. CSTN driver boards are just no longer available. (But I do confirm that they once existed) Currently, the only solution is to use an FPGA to build a driver board.

This project, once again, utilize my Xilinx ML505 Virtex-5 development board. The on-board VGA decoder is used for capturing incoming VGA video signal, and the CSTN screen is connected to the XGI expansion port. (By the way, Xilinx ditched both ports on their 6 series development boards, making ML505 the last development board with lots of on-board peripherals and a 2.54mm expansion port.)

Currently, the project is almost done. It could capture the VGA signal and display the image on the screen at 60Hz Vsync. STN LCD runs at 120Hz or 240Hz to improve color depth. Demo video is coming.

License

OHDL

About

FPGA-based CSTN monitor

Resources

Readme
Activity

Stars

16 stars

Watchers

1 watching

Forks

2 forks
Report repository

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Packages

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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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CSTroN
CSTN was once popular among low-end laptops and cellphones, and its predecessor, STN was almost the only viable option for laptop before TFT LCD was invented. Thanks to the advance of technology, they are fully replaced with TFT LCD. But just for fun, how would software and games today look like on a 90s CSTN LCD?
Basically, this project aims to build an LCD monitor based around a CSTN screen (specifically SX21V004, but once done, it is easy to adapt other panels).
This task would be easy for normal TFT LCDs, one would just need to buy the screen, the driver board, and optionally a case, assemble them together, done. Though one may build driver board and/or case yourself, but given they are easy to find and very affordable, there is not many reasons to build by oneself.
But the story is quite different for CSTN. Most of the large (>3") CSTNs use a very different interface than TFT LCD, making it impossible to connect them to normal driver board designed for TFT LCDs. CSTN driver boards are just no longer available. (But I do confirm that they once existed) Currently, the only solution is to use an FPGA to build a driver board.
This project, once again, utilize my Xilinx ML505 Virtex-5 development board. The on-board VGA decoder is used for capturing incoming VGA video signal, and the CSTN screen is connected to the XGI expansion port. (By the way, Xilinx ditched both ports on their 6 series development boards, making ML505 the last development board with lots of on-board peripherals and a 2.54mm expansion port.)
Currently, the project is almost done. It could capture the VGA signal and display the image on the screen at 60Hz Vsync. STN LCD runs at 120Hz or 240Hz to improve color depth. Demo video is coming.
License
OHDL
About
FPGA-based CSTN monitor
Resources
Readme
Activity
Stars
16 stars
Watchers
1 watching
Forks
2 forks
Report repository
Releases
Packages
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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CSTroN
CSTN was once popular among low-end laptops and cellphones, and its predecessor, STN was almost the only viable option for laptop before TFT LCD was invented. Thanks to the advance of technology, they are fully replaced with TFT LCD. But just for fun, how would software and games today look like on a 90s CSTN LCD?
Basically, this project aims to build an LCD monitor based around a CSTN screen (specifically SX21V004, but once done, it is easy to adapt other panels).
This task would be easy for normal TFT LCDs, one would just need to buy the screen, the driver board, and optionally a case, assemble them together, done. Though one may build driver board and/or case yourself, but given they are easy to find and very affordable, there is not many reasons to build by oneself.
But the story is quite different for CSTN. Most of the large (>3") CSTNs use a very different interface than TFT LCD, making it impossible to connect them to normal driver board designed for TFT LCDs. CSTN driver boards are just no longer available. (But I do confirm that they once existed) Currently, the only solution is to use an FPGA to build a driver board.
This project, once again, utilize my Xilinx ML505 Virtex-5 development board. The on-board VGA decoder is used for capturing incoming VGA video signal, and the CSTN screen is connected to the XGI expansion port. (By the way, Xilinx ditched both ports on their 6 series development boards, making ML505 the last development board with lots of on-board peripherals and a 2.54mm expansion port.)
Currently, the project is almost done. It could capture the VGA signal and display the image on the screen at 60Hz Vsync. STN LCD runs at 120Hz or 240Hz to improve color depth. Demo video is coming.
License
OHDL
About
FPGA-based CSTN monitor
Resources
Readme
Activity
Stars
16 stars
Watchers
1 watching
Forks
2 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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CSTroN
CSTN was once popular among low-end laptops and cellphones, and its predecessor, STN was almost the only viable option for laptop before TFT LCD was invented. Thanks to the advance of technology, they are fully replaced with TFT LCD. But just for fun, how would software and games today look like on a 90s CSTN LCD?
Basically, this project aims to build an LCD monitor based around a CSTN screen (specifically SX21V004, but once done, it is easy to adapt other panels).
This task would be easy for normal TFT LCDs, one would just need to buy the screen, the driver board, and optionally a case, assemble them together, done. Though one may build driver board and/or case yourself, but given they are easy to find and very affordable, there is not many reasons to build by oneself.
But the story is quite different for CSTN. Most of the large (>3") CSTNs use a very different interface than TFT LCD, making it impossible to connect them to normal driver board designed for TFT LCDs. CSTN driver boards are just no longer available. (But I do confirm that they once existed) Currently, the only solution is to use an FPGA to build a driver board.
This project, once again, utilize my Xilinx ML505 Virtex-5 development board. The on-board VGA decoder is used for capturing incoming VGA video signal, and the CSTN screen is connected to the XGI expansion port. (By the way, Xilinx ditched both ports on their 6 series development boards, making ML505 the last development board with lots of on-board peripherals and a 2.54mm expansion port.)
Currently, the project is almost done. It could capture the VGA signal and display the image on the screen at 60Hz Vsync. STN LCD runs at 120Hz or 240Hz to improve color depth. Demo video is coming.
License
OHDL
About
FPGA-based CSTN monitor
Resources
Readme
Activity
Stars
16 stars
Watchers
1 watching
Forks
2 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

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CSTroN
CSTN was once popular among low-end laptops and cellphones, and its predecessor, STN was almost the only viable option for laptop before TFT LCD was invented. Thanks to the advance of technology, they are fully replaced with TFT LCD. But just for fun, how would software and games today look like on a 90s CSTN LCD?
Basically, this project aims to build an LCD monitor based around a CSTN screen (specifically SX21V004, but once done, it is easy to adapt other panels).
This task would be easy for normal TFT LCDs, one would just need to buy the screen, the driver board, and optionally a case, assemble them together, done. Though one may build driver board and/or case yourself, but given they are easy to find and very affordable, there is not many reasons to build by oneself.
But the story is quite different for CSTN. Most of the large (>3") CSTNs use a very different interface than TFT LCD, making it impossible to connect them to normal driver board designed for TFT LCDs. CSTN driver boards are just no longer available. (But I do confirm that they once existed) Currently, the only solution is to use an FPGA to build a driver board.
This project, once again, utilize my Xilinx ML505 Virtex-5 development board. The on-board VGA decoder is used for capturing incoming VGA video signal, and the CSTN screen is connected to the XGI expansion port. (By the way, Xilinx ditched both ports on their 6 series development boards, making ML505 the last development board with lots of on-board peripherals and a 2.54mm expansion port.)
Currently, the project is almost done. It could capture the VGA signal and display the image on the screen at 60Hz Vsync. STN LCD runs at 120Hz or 240Hz to improve color depth. Demo video is coming.
License
OHDL
About
FPGA-based CSTN monitor
Resources
Readme
Activity
Stars
16 stars
Watchers
1 watching
Forks
2 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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CSTroN
CSTN was once popular among low-end laptops and cellphones, and its predecessor, STN was almost the only viable option for laptop before TFT LCD was invented. Thanks to the advance of technology, they are fully replaced with TFT LCD. But just for fun, how would software and games today look like on a 90s CSTN LCD?
Basically, this project aims to build an LCD monitor based around a CSTN screen (specifically SX21V004, but once done, it is easy to adapt other panels).
This task would be easy for normal TFT LCDs, one would just need to buy the screen, the driver board, and optionally a case, assemble them together, done. Though one may build driver board and/or case yourself, but given they are easy to find and very affordable, there is not many reasons to build by oneself.
But the story is quite different for CSTN. Most of the large (>3") CSTNs use a very different interface than TFT LCD, making it impossible to connect them to normal driver board designed for TFT LCDs. CSTN driver boards are just no longer available. (But I do confirm that they once existed) Currently, the only solution is to use an FPGA to build a driver board.
This project, once again, utilize my Xilinx ML505 Virtex-5 development board. The on-board VGA decoder is used for capturing incoming VGA video signal, and the CSTN screen is connected to the XGI expansion port. (By the way, Xilinx ditched both ports on their 6 series development boards, making ML505 the last development board with lots of on-board peripherals and a 2.54mm expansion port.)
Currently, the project is almost done. It could capture the VGA signal and display the image on the screen at 60Hz Vsync. STN LCD runs at 120Hz or 240Hz to improve color depth. Demo video is coming.
License
OHDL
About
FPGA-based CSTN monitor
Resources
Readme
Activity
Stars
16 stars
Watchers
1 watching
Forks
2 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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CSTroN
CSTN was once popular among low-end laptops and cellphones, and its predecessor, STN was almost the only viable option for laptop before TFT LCD was invented. Thanks to the advance of technology, they are fully replaced with TFT LCD. But just for fun, how would software and games today look like on a 90s CSTN LCD?
Basically, this project aims to build an LCD monitor based around a CSTN screen (specifically SX21V004, but once done, it is easy to adapt other panels).
This task would be easy for normal TFT LCDs, one would just need to buy the screen, the driver board, and optionally a case, assemble them together, done. Though one may build driver board and/or case yourself, but given they are easy to find and very affordable, there is not many reasons to build by oneself.
But the story is quite different for CSTN. Most of the large (>3") CSTNs use a very different interface than TFT LCD, making it impossible to connect them to normal driver board designed for TFT LCDs. CSTN driver boards are just no longer available. (But I do confirm that they once existed) Currently, the only solution is to use an FPGA to build a driver board.
This project, once again, utilize my Xilinx ML505 Virtex-5 development board. The on-board VGA decoder is used for capturing incoming VGA video signal, and the CSTN screen is connected to the XGI expansion port. (By the way, Xilinx ditched both ports on their 6 series development boards, making ML505 the last development board with lots of on-board peripherals and a 2.54mm expansion port.)
Currently, the project is almost done. It could capture the VGA signal and display the image on the screen at 60Hz Vsync. STN LCD runs at 120Hz or 240Hz to improve color depth. Demo video is coming.
License
OHDL
About
FPGA-based CSTN monitor
Resources
Readme
Activity
Stars
16 stars
Watchers
1 watching
Forks
2 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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CSTroN
CSTN was once popular among low-end laptops and cellphones, and its predecessor, STN was almost the only viable option for laptop before TFT LCD was invented. Thanks to the advance of technology, they are fully replaced with TFT LCD. But just for fun, how would software and games today look like on a 90s CSTN LCD?
Basically, this project aims to build an LCD monitor based around a CSTN screen (specifically SX21V004, but once done, it is easy to adapt other panels).
This task would be easy for normal TFT LCDs, one would just need to buy the screen, the driver board, and optionally a case, assemble them together, done. Though one may build driver board and/or case yourself, but given they are easy to find and very affordable, there is not many reasons to build by oneself.
But the story is quite different for CSTN. Most of the large (>3") CSTNs use a very different interface than TFT LCD, making it impossible to connect them to normal driver board designed for TFT LCDs. CSTN driver boards are just no longer available. (But I do confirm that they once existed) Currently, the only solution is to use an FPGA to build a driver board.
This project, once again, utilize my Xilinx ML505 Virtex-5 development board. The on-board VGA decoder is used for capturing incoming VGA video signal, and the CSTN screen is connected to the XGI expansion port. (By the way, Xilinx ditched both ports on their 6 series development boards, making ML505 the last development board with lots of on-board peripherals and a 2.54mm expansion port.)
Currently, the project is almost done. It could capture the VGA signal and display the image on the screen at 60Hz Vsync. STN LCD runs at 120Hz or 240Hz to improve color depth. Demo video is coming.
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FPGA-based CSTN monitor
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