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fixup some links to archives

BigEd 2021-10-29 17:34:31 +01:00
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Home.md

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# Main Page
Welcome to the visualchips wiki. Please see also [the visual6502.org site](https://web.archive.org/web/20210519010648/http://visual6502.org/) which contains the backstory, [useful links](https://web.archive.org/web/20210519010648/http://visual6502.org/links.html), [a FAQ](https://web.archive.org/web/20210519010648/http://visual6502.org/faq.html), and a link to [the project blog](https://web.archive.org/web/20210519010648/http://blog.visual6502.org/).
Welcome to the visualchips wiki. Please see also [the visual6502.org site](/ttp://visual6502.org/) which contains the backstory, [useful links](http://visual6502.org/links.html), [a FAQ](http://visual6502.org/faq.html), and a link to [the project blog](http://blog.visual6502.org/).
We're all about [reverse-engineering](/web/20210519010648/http://visual6502.org/wiki/index.php?title=The_reverse_engineering_process) popular chips from the 70's and 80's - initially the 6502 but others too. This wiki is for documenting our findings and recording our sources, and is of course a work in progress.
The [online help for our JavaScript simulator](/web/20210519010648/http://visual6502.org/wiki/index.php?title=JssimUserHelp) is also here, to help you get the most from that. (Note that it's only a switch-level simulator - our data also supports more accurate models. For most purposes, there's no difference.) For help on reading the layout, interpreting transistor circuits, and more about digital design, please see the [Visual Circuit Tutorial](https://web.archive.org/web/20210519010648/http://wiki.nesdev.com/w/index.php/Visual_circuit_tutorial) over at NESdev.
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# Projects and status
Here's the state of play of the chips we're most actively working on. (See also the [wiki index](/web/20210519010648/http://visual6502.org/wiki/index.php?title=Special:AllPages) for exploration.)
* <a href="/web/20210519010648/http://visual6502.org/wiki/index.php?title=Motorola_6800" title="Motorola 6800">Motorola 6800</a> CPU: Breaking news! The <a href="https://web.archive.org/web/20210519010648/http://visual6502.org/JSSim/expert-6800.html" class="external text" rel="nofollow">Visual 6800 JavaScript simulator is now live</a>. See <a href="/web/20210519010648/http://visual6502.org/wiki/index.php?title=Motorola_6800" title="Motorola 6800">Motorola 6800</a> for notes on the implementation of this chip, and the relationship to 6502.
* <a href="/web/20210519010648/http://visual6502.org/wiki/index.php?title=Motorola_6800" title="Motorola 6800">Motorola 6800</a> CPU: Breaking news! The <a href="http://visual6502.org/JSSim/expert-6800.html" class="external text" rel="nofollow">Visual 6800 JavaScript simulator is now live</a>. See <a href="/web/20210519010648/http://visual6502.org/wiki/index.php?title=Motorola_6800" title="Motorola 6800">Motorola 6800</a> for notes on the implementation of this chip, and the relationship to 6502.
* <a href="/web/20210519010648/http://visual6502.org/wiki/index.php?title=MOS_6502" title="MOS 6502">MOS 6502</a> CPU: Our flagship project: we have several pages of findings and many pointers to other resources. We started from <a href="/web/20210519010648/http://visual6502.org/wiki/index.php?title=Photos_of_MOS_6502D" title="Photos of MOS 6502D">photos</a> and now have a full transistor level netlist with transistor sizes, and of course <a href="https://web.archive.org/web/20210519010648/http://visual6502.org/JSSim/expert.html?nosim=t&amp;label=PLA,100,1169,2328,8393,934&amp;label=Datapath,100,2143,8820,7676,5689&amp;label=Control,100,3333,4083" class="external text" rel="nofollow">our in-browser simulator</a>.
* <a href="/web/20210519010648/http://visual6502.org/wiki/index.php?title=MOS_6502" title="MOS 6502">MOS 6502</a> CPU: Our flagship project: we have several pages of findings and many pointers to other resources. We started from <a href="/web/20210519010648/http://visual6502.org/wiki/index.php?title=Photos_of_MOS_6502D" title="Photos of MOS 6502D">photos</a> and now have a full transistor level netlist with transistor sizes, and of course <a href="http://visual6502.org/JSSim/expert.html?nosim=t&amp;label=PLA,100,1169,2328,8393,934&amp;label=Datapath,100,2143,8820,7676,5689&amp;label=Control,100,3333,4083" class="external text" rel="nofollow">our in-browser simulator</a>.
* Atari 10444D TIA (Television Interface Adaptor): fully extracted and simulated, no data yet published.
* <a href="https://web.archive.org/web/20210519010648/http://visual6502.org/images/pages/Atari_10444D_TIA.html" class="external text" rel="nofollow">Pictures and story</a> on our main site.
* <a href="http://visual6502.org/images/pages/Atari_10444D_TIA.html" class="external text" rel="nofollow">Pictures and story</a> on our main site.
* Atari ANTIC: layout is in the process of polygon capture or netlist extraction.<br/>Primary data not yet published, but see <a href="https://web.archive.org/web/20210519010648/http://www.atariage.com/forums/topic/172580-antic-decap-and-reverse-engineering/" class="external text" rel="nofollow">these</a> <a href="https://web.archive.org/web/20210519010648/http://www.atariage.com/forums/topic/136706-internal-antic-and-gtia-schematics/" class="external text" rel="nofollow">threads</a>.
* <a href="/web/20210519010648/http://visual6502.org/wiki/index.php?title=Z8400" title="Z8400">Zilog Z80 CPU</a>: We have photographs of the metal layer, and have started capturing the polygons. No public information yet.
* <a href="/web/20210519010648/http://visual6502.org/wiki/index.php?title=Motorola_68000" title="Motorola 68000">Motorola 68000</a>: We have <a href="https://web.archive.org/web/20210519010648/http://visual6502.org/images/pages/Motorola_68000.html" class="external text" rel="nofollow">photographs</a> of the metal layer, and have started capturing the polygons.<br/>The project page contains die photo and shows areas being captured. This chip will need further deprocessing and photography for the lower layers.
* <a href="/web/20210519010648/http://visual6502.org/wiki/index.php?title=Motorola_68000" title="Motorola 68000">Motorola 68000</a>: We have <a href="http://visual6502.org/images/pages/Motorola_68000.html" class="external text" rel="nofollow">photographs</a> of the metal layer, and have started capturing the polygons.<br/>The project page contains die photo and shows areas being captured. This chip will need further deprocessing and photography for the lower layers.
* <a href="/web/20210519010648/http://visual6502.org/wiki/index.php?title=RCA_1802E" title="RCA 1802E">RCA 1802E</a> space-faring radiation-hard CPU: <a href="https://web.archive.org/web/20210519010648/http://visual6502.org/images/pages/RCA_1802.html" class="external text" rel="nofollow">pictures and story</a> on our main site.
* <a href="/web/20210519010648/http://visual6502.org/wiki/index.php?title=RCA_1802E" title="RCA 1802E">RCA 1802E</a> space-faring radiation-hard CPU: <a href="http://visual6502.org/images/pages/RCA_1802.html" class="external text" rel="nofollow">pictures and story</a> on our main site.
* MOS 6522 VIA: <a href="https://web.archive.org/web/20210519010648/http://visual6502.org/images/pages/MOS_6522.html" class="external text" rel="nofollow">pictures and story</a> on our main site.
* MOS 6522 VIA: <a href="http://visual6502.org/images/pages/MOS_6522.html" class="external text" rel="nofollow">pictures and story</a> on our main site.
* Nintendo 3193A support chip <a href="http://visual6502.org/images/pages/Nintendo_3193A.html" class="external text" rel="nofollow">pictures and story</a> on our main site.