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Create MOS Technology 6502 backend #6502

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Create MOS Technology 6502 backend#6502
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backend-self-hostedenhancementSolving this issue will likely involve adding new logic or components to the codebase.frontendTokenization, parsing, AstGen, Sema, and Liveness.
Milestone
post-1.0

Description

@ikskuh
ikskuh
opened on Oct 2, 2020

The MOS Technology 6502 is one of the most famous processors which was used in a lot of home computers in the 80ies.
Even today it is mostly programmed in assembly. There aren't many compilers available, most prominent one is cc65, a C compiler.

Zig would be in a unique position to be a modern compiler for the 6502 processor family.

The 6502 does not have a huge instruction set, but has a lot of restrictions which makes code generation and optimization hard, but i think it's still worth a try.

Imagine programming your C64 in Zig!

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      , 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
       blocks
(function() {
function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;
codeBlock.parentElement.setAttribute('data-copy-added', 'true');
var btn = document.createElement('button');
btn.textContent = 'Copy';
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;';
btn.onmouseover = function() { this.style.opacity = '1'; };
btn.onmouseout = function() { this.style.opacity = '0.7'; };
btn.onclick = function() {
navigator.clipboard.writeText(codeBlock.textContent).then(function() {
btn.textContent = 'Copied!';
setTimeout(function() { btn.textContent = 'Copy'; }, 1500);
});
};
codeBlock.parentElement.style.position = 'relative';
codeBlock.parentElement.appendChild(btn);
});
}
addCopyButtons();
// Re-run on dynamic content
var observer = new MutationObserver(addCopyButtons);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
Create MOS Technology 6502 backend · Issue #6502 · ziglang/zig · GitHub
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      Create MOS Technology 6502 backend #6502
      Open
      Open
      Create MOS Technology 6502 backend#6502
      Labels
      backend-self-hostedenhancementSolving this issue will likely involve adding new logic or components to the codebase.frontendTokenization, parsing, AstGen, Sema, and Liveness.
      Milestone
      post-1.0
      Description
      @ikskuh
      ikskuh
      opened on Oct 2, 2020
      The MOS Technology 6502 is one of the most famous processors which was used in a lot of home computers in the 80ies.
      
Even today it is mostly programmed in assembly. There aren't many compilers available, most prominent one is cc65, a C compiler.
      Zig would be in a unique position to be a modern compiler for the 6502 processor family.
      The 6502 does not have a huge instruction set, but has a lot of restrictions which makes code generation and optimization hard, but i think it's still worth a try.
      Imagine programming your C64 in Zig!
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        backend-self-hostedenhancementSolving this issue will likely involve adding new logic or components to the codebase.frontendTokenization, parsing, AstGen, Sema, and Liveness.
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Force GitHub README to respect dark mode
(function() {
var style = document.createElement('style');
style.textContent = '
.markdown-body {
color-scheme: dark light;
}
.markdown-body pre { background: #161b22 !important; }
.markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }
.markdown-body table th, .markdown-body table td { border-color: #30363d !important; }
.markdown-body img { background: #0d1117; }
.markdown-body blockquote { border-left-color: #8b949e; }
.markdown-body hr { border-color: #30363d; }
';
document.head.appendChild(style);
})();
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Create MOS Technology 6502 backend · Issue #6502 · ziglang/zig · GitHub
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          Create MOS Technology 6502 backend #6502
          Open
          Open
          Create MOS Technology 6502 backend#6502
          Labels
          backend-self-hostedenhancementSolving this issue will likely involve adding new logic or components to the codebase.frontendTokenization, parsing, AstGen, Sema, and Liveness.
          Milestone
          post-1.0
          Description
          @ikskuh
          ikskuh
          opened on Oct 2, 2020
          The MOS Technology 6502 is one of the most famous processors which was used in a lot of home computers in the 80ies.
          
Even today it is mostly programmed in assembly. There aren't many compilers available, most prominent one is cc65, a C compiler.
          Zig would be in a unique position to be a modern compiler for the 6502 processor family.
          The 6502 does not have a huge instruction set, but has a lot of restrictions which makes code generation and optimization hard, but i think it's still worth a try.
          Imagine programming your C64 in Zig!
          Metadata
          Metadata
          Assignees
          No one assigned
            Labels
            backend-self-hostedenhancementSolving this issue will likely involve adding new logic or components to the codebase.frontendTokenization, parsing, AstGen, Sema, and Liveness.
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
(function() {
var ref = document.referrer;
var terms = [];
if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {
var url = new URL(ref);
var q = url.searchParams.get('q') || url.searchParams.get('p');
if (q) {
terms = q.split(/\s+/).filter(function(t) { return t.length > 2; });
}
}
if (terms.length === 0) return;
var style = document.createElement('style');
style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';
document.head.appendChild(style);
function highlight(node) {
if (node.nodeType === 3) { // text node
var text = node.textContent;
var found = false;
terms.forEach(function(term) {
var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi');
if (regex.test(text)) {
found = true;
var frag = document.createDocumentFragment();
var parts = text.split(regex);
parts.forEach(function(part, i) {
if (i % 2 === 0) {
frag.appendChild(document.createTextNode(part));
} else {
var span = document.createElement('span');
span.className = 'userscript-highlight';
span.textContent = part;
frag.appendChild(span);
}
});
node.parentNode.replaceChild(frag, node);
}
});
} else if (node.nodeType === 1 && node.childNodes) { // element
var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];
if (!skipTags.includes(node.tagName)) {
Array.from(node.childNodes).forEach(highlight);
}
}
}
highlight(document.body);
// Re-highlight on dynamic content
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1 || node.nodeType === 3) highlight(node);
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Create MOS Technology 6502 backend · Issue #6502 · ziglang/zig · GitHub
              Skip to content
              Create MOS Technology 6502 backend #6502
              Open
              Open
              Create MOS Technology 6502 backend#6502
              Labels
              backend-self-hostedenhancementSolving this issue will likely involve adding new logic or components to the codebase.frontendTokenization, parsing, AstGen, Sema, and Liveness.
              Milestone
              post-1.0
              Description
              @ikskuh
              ikskuh
              opened on Oct 2, 2020
              The MOS Technology 6502 is one of the most famous processors which was used in a lot of home computers in the 80ies.
              
Even today it is mostly programmed in assembly. There aren't many compilers available, most prominent one is cc65, a C compiler.
              Zig would be in a unique position to be a modern compiler for the 6502 processor family.
              The 6502 does not have a huge instruction set, but has a lot of restrictions which makes code generation and optimization hard, but i think it's still worth a try.
              Imagine programming your C64 in Zig!
              Metadata
              Metadata
              Assignees
              No one assigned
                Labels
                backend-self-hostedenhancementSolving this issue will likely involve adding new logic or components to the codebase.frontendTokenization, parsing, AstGen, Sema, and Liveness.
                Type
                No type
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                No projects
                  Milestone
                  Relationships
                  None yet
                  Development
                  No branches or pull requests
                  Issue actions
                  
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
Create MOS Technology 6502 backend · Issue #6502 · ziglang/zig · GitHub
                  Skip to content
                  Create MOS Technology 6502 backend #6502
                  Open
                  Open
                  Create MOS Technology 6502 backend#6502
                  Labels
                  backend-self-hostedenhancementSolving this issue will likely involve adding new logic or components to the codebase.frontendTokenization, parsing, AstGen, Sema, and Liveness.
                  Milestone
                  post-1.0
                  Description
                  @ikskuh
                  ikskuh
                  opened on Oct 2, 2020
                  The MOS Technology 6502 is one of the most famous processors which was used in a lot of home computers in the 80ies.
                  
Even today it is mostly programmed in assembly. There aren't many compilers available, most prominent one is cc65, a C compiler.
                  Zig would be in a unique position to be a modern compiler for the 6502 processor family.
                  The 6502 does not have a huge instruction set, but has a lot of restrictions which makes code generation and optimization hard, but i think it's still worth a try.
                  Imagine programming your C64 in Zig!
                  Metadata
                  Metadata
                  Assignees
                  No one assigned
                    Labels
                    backend-self-hostedenhancementSolving this issue will likely involve adding new logic or components to the codebase.frontendTokenization, parsing, AstGen, Sema, and Liveness.
                    Type
                    No type
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                    No projects
                      Milestone
                      Relationships
                      None yet
                      Development
                      No branches or pull requests
                      Issue actions
                      
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Create MOS Technology 6502 backend · Issue #6502 · ziglang/zig · GitHub
                      Skip to content
                      Create MOS Technology 6502 backend #6502
                      Open
                      Open
                      Create MOS Technology 6502 backend#6502
                      Labels
                      backend-self-hostedenhancementSolving this issue will likely involve adding new logic or components to the codebase.frontendTokenization, parsing, AstGen, Sema, and Liveness.
                      Milestone
                      post-1.0
                      Description
                      @ikskuh
                      ikskuh
                      opened on Oct 2, 2020
                      The MOS Technology 6502 is one of the most famous processors which was used in a lot of home computers in the 80ies.
                      
Even today it is mostly programmed in assembly. There aren't many compilers available, most prominent one is cc65, a C compiler.
                      Zig would be in a unique position to be a modern compiler for the 6502 processor family.
                      The 6502 does not have a huge instruction set, but has a lot of restrictions which makes code generation and optimization hard, but i think it's still worth a try.
                      Imagine programming your C64 in Zig!
                      Metadata
                      Metadata
                      Assignees
                      No one assigned
                        Labels
                        backend-self-hostedenhancementSolving this issue will likely involve adding new logic or components to the codebase.frontendTokenization, parsing, AstGen, Sema, and Liveness.
                        Type
                        No type
                        Projects
                        No projects
                          Milestone
                          Relationships
                          None yet
                          Development
                          No branches or pull requests
                          Issue actions
                          
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
el.style.zIndex = 'auto';
}
});
}
unstick();
var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Create MOS Technology 6502 backend · Issue #6502 · ziglang/zig · GitHub
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                          Create MOS Technology 6502 backend #6502
                          Open
                          Open
                          Create MOS Technology 6502 backend#6502
                          Labels
                          backend-self-hostedenhancementSolving this issue will likely involve adding new logic or components to the codebase.frontendTokenization, parsing, AstGen, Sema, and Liveness.
                          Milestone
                          post-1.0
                          Description
                          @ikskuh
                          ikskuh
                          opened on Oct 2, 2020
                          The MOS Technology 6502 is one of the most famous processors which was used in a lot of home computers in the 80ies.
                          
Even today it is mostly programmed in assembly. There aren't many compilers available, most prominent one is cc65, a C compiler.
                          Zig would be in a unique position to be a modern compiler for the 6502 processor family.
                          The 6502 does not have a huge instruction set, but has a lot of restrictions which makes code generation and optimization hard, but i think it's still worth a try.
                          Imagine programming your C64 in Zig!
                          Metadata
                          Metadata
                          Assignees
                          No one assigned
                            Labels
                            backend-self-hostedenhancementSolving this issue will likely involve adding new logic or components to the codebase.frontendTokenization, parsing, AstGen, Sema, and Liveness.
                            Type
                            No type
                            Projects
                            No projects
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                              Relationships
                              None yet
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                              Issue actions
                              
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
// Toggle with Alt+Shift+D
document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
// Apply on load
applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();
Create MOS Technology 6502 backend · Issue #6502 · ziglang/zig · GitHub
                              Skip to content
                              Create MOS Technology 6502 backend #6502
                              Open
                              Open
                              Create MOS Technology 6502 backend#6502
                              Labels
                              backend-self-hostedenhancementSolving this issue will likely involve adding new logic or components to the codebase.frontendTokenization, parsing, AstGen, Sema, and Liveness.
                              Milestone
                              post-1.0
                              Description
                              @ikskuh
                              ikskuh
                              opened on Oct 2, 2020
                              The MOS Technology 6502 is one of the most famous processors which was used in a lot of home computers in the 80ies.
                              
Even today it is mostly programmed in assembly. There aren't many compilers available, most prominent one is cc65, a C compiler.
                              Zig would be in a unique position to be a modern compiler for the 6502 processor family.
                              The 6502 does not have a huge instruction set, but has a lot of restrictions which makes code generation and optimization hard, but i think it's still worth a try.
                              Imagine programming your C64 in Zig!
                              Metadata
                              Metadata
                              Assignees
                              No one assigned
                                Labels
                                backend-self-hostedenhancementSolving this issue will likely involve adding new logic or components to the codebase.frontendTokenization, parsing, AstGen, Sema, and Liveness.
                                Type
                                No type
                                Projects
                                No projects
                                  Milestone
                                  Relationships
                                  None yet
                                  Development
                                  No branches or pull requests
                                  Issue actions