Main Page - Revision history

Immibis at 14:09, 21 June 2025

2025-06-21T14:09:38Z

← Older revision		Revision as of 14:09, 21 June 2025
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	<p style="font-size: xx-large; margin: 0;">Homebrew CPU Wiki</p>		<p style="font-size: xx-large; margin: 0;">Homebrew CPU Wiki</p>
	This main page is mostly a placeholder for now.<br>		This main page is mostly a placeholder for now.<br>
	To get editing permission, create an account and ~~ping~~ immibis on IRC. irc.~~libera~~.~~chat #cpudev~~		To get editing permission, create an account and send a private message to immibis on IRC - irc.oftc.net
	\|}		\|}

Immibis: added external interfaces to try and balance it more

2021-07-06T17:43:32Z

added external interfaces to try and balance it more

← Older revision		Revision as of 17:43, 6 July 2021
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	<!-- Right side: various reference information, try to order by put most-widely-applicable stuff at the top -->		<!-- Right side: various reference information, try to order by put most-widely-applicable stuff at the top -->

	{{Box\|title=Logic ~~reference~~\|		{{Box\|title=Logic references\|
	* [[Relay logic]]		* [[Relay logic]]
	* [[Logic level reference]]		* [[Logic level reference]]
	* [[Logic chip reference]]		* [[Logic chip reference]]
	}} <!-- ~~Looking~~ pretty unbalanced! More stuff needed here -->		}}
			{{Box\|title=External interfaces\|
			* [[UART]]
			* [[I2C]] / [[SPI]]
			* [[VGA]]
			* [[PS/2]] (mouse and keyboard)
			* [[Ethernet]]
			* [[USB]]
			}} <!-- looking pretty unbalanced! More stuff needed here -->
	{{Box\|title=CPU projects\|		{{Box\|title=CPU projects\|
	* [https://www.bigmessowires.com/bmow1/ Big Mess of Wires]		* [https://www.bigmessowires.com/bmow1/ Big Mess of Wires]

Immibis: another revision

2021-07-05T21:18:51Z

another revision

← Older revision		Revision as of 21:18, 5 July 2021
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	\| style="vertical-align: top;" \|		\| style="vertical-align: top;" \|

	{{Box\|title=~~Major components~~ and ~~concepts~~\|		<!-- Left side: tutorials. Starting from the top (and skipping irrelevant ones) should get a new person going in a useful direction, kinda like a tutorial. More experienced people can go farther down the list. At some point it can split into branches -->
	* [[Instruction ~~Set Architecture~~]]
			{{Box\|title=Getting started\|
			Essential knowledge:
			* [[Introduction to digital logic]]
			* [[Binary arithmetic]]
			* [[How a computer works]]
			Designing and simulating a CPU:
			* [[Getting started - Logisim]]
			* [[Getting started - FPGAs]]
			Building a CPU in real life:
			* [[Electronics primer]]
			* [[Getting started - logic chips]]
			* [[Getting started - transistor circuits]]
			* [[Getting started - relay circuits]]
			}}
			{{Box\|title=Basic CPU design\|
			Important design considerations:
			* [[Programmer's model]]
			* [[Harvard vs Von Neumann]]
			* [[RISC vs CISC]]
			* [[Number of bits]]
			Hardware design:
			* [[Instruction encoding]]
			* [[Data path]]
			* [[ALU]]
	* [[Control unit]]		* [[Control unit]]
	** [[Instruction decoding]]
	** [[Microcode]]
	* [[ALU]]
	* [[Memory bus]]
	** [[RAM]]
	** [[Memory-mapped IO]]
	* [[External interfaces]]
	** [[UART console]]
	** [[GPIO]]
	** [[SD card storage]]
	** [[Character LCD]]
	** [[PS/2 keyboard]]
	** [[Audio output]]
	** [[VGA video]]
	** [[USB]]
	}}		}}

	{{Box\|title=Software\|		{{Box\|title=Software\|
	* [[~~Writing an assembler~~]]		* [[Emulator]]
	* [[~~Writing an emulator~~]]		* [[Assembly language]]
			* [[C language]]
			* [[Forth language]]
	}}		}}
			{{Box\|title=Advanced topics\|
	{{Box\|title=Advanced ~~instruction~~ set\|		Instruction set extensions:
	* [[~~Interrupts~~ and ~~exceptions~~]]		* [[Exceptions and interrupts]]
			* [[Floating-point unit]]
	* [[Virtual memory]]		* [[Virtual memory]]
	* [[~~Memory protection~~]]		Performance tricks:
	}}		* [[Instruction prefetching]]
			* [[Pipelining]]
	~~{{Box\|title=Performance optimizations\|~~
	* [[~~Prefetching~~]]
	* [[Branch prediction]]		* [[Branch prediction]]
	* [[Data cache]]		* [[Data cache]]
Line 50:		Line 59:

	\| style="vertical-align: top; padding-left: 10px;" \|		\| style="vertical-align: top; padding-left: 10px;" \|
	~~{{Box\|title=Implementation technology\|~~
	* [[Intro to binary logic]]
	** [[Logic simulators]]
	* [[FPGA development]]
	* [[Intro to electronics]]
	** [[Logic chips]]
	** [[Transistor logic]]
	** [[Relay logic]]
	* [[Exotic logic families]]
	}}

			<!-- Right side: various reference information, try to order by put most-widely-applicable stuff at the top -->

			{{Box\|title=Logic reference\|
			* [[Relay logic]]
			* [[Logic level reference]]
			* [[Logic chip reference]]
			}} <!-- Looking pretty unbalanced! More stuff needed here -->
	{{Box\|title=CPU projects\|		{{Box\|title=CPU projects\|
	* [https://www.bigmessowires.com/bmow1/ Big Mess of Wires]		* [https://www.bigmessowires.com/bmow1/ Big Mess of Wires]

Immibis: Use the new Box template

2021-07-05T18:56:18Z

Use the new Box template

← Older revision		Revision as of 18:56, 5 July 2021
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	{\| style="width: 100%;" \|		{\| style="width: 100%;" \|
	\| style="vertical-align: top;" \|		\| style="vertical-align: top;" \|
	~~<div style="background-color: #fff7f2; border: solid 1px #ffddc6; padding: 0.5em; margin-bottom: 13px;">~~
	~~<div style~~=~~"font-weight: bold; background-color: #ffe7d6; margin: 0; border: solid 1px #ffddc6; padding: 0 0.5em 0 0.5em;">~~Major components and concepts~~</div>~~		{{Box\|title=Major components and concepts\|
	* [[Instruction Set Architecture]]		* [[Instruction Set Architecture]]
	* [[Control unit]]		* [[Control unit]]
Line 28:		Line 28:
	** [[VGA video]]		** [[VGA video]]
	** [[USB]]		** [[USB]]
	~~</div>~~		}}

	~~<div style~~=~~"background-color: #fff7f2; border: solid 1px #ffddc6; padding: 0.5em; margin-bottom: 13px;">~~		{{Box\|title=Software\|
	~~<div style="font-weight: bold; background-color: #ffe7d6; margin: 0; border: solid 1px #ffddc6; padding: 0 0.5em 0 0.5em;">~~Software~~</div>~~
	* [[Writing an assembler]]		* [[Writing an assembler]]
	* [[Writing an emulator]]		* [[Writing an emulator]]
	~~</div>~~		}}

	~~<div style~~=~~"background-color: #fff7f2; border: solid 1px #ffddc6; padding: 0.5em; margin-bottom: 13px;">~~		{{Box\|title=Advanced instruction set\|
	~~<div style="font-weight: bold; background-color: #ffe7d6; margin: 0; border: solid 1px #ffddc6; padding: 0 0.5em 0 0.5em;">~~Advanced instruction set~~</div>~~
	* [[Interrupts and exceptions]]		* [[Interrupts and exceptions]]
	* [[Virtual memory]]		* [[Virtual memory]]
	* [[Memory protection]]		* [[Memory protection]]
	~~</div>~~		}}

	~~<div style~~=~~"background-color: #fff7f2; border: solid 1px #ffddc6; padding: 0.5em; margin-bottom: 13px;">~~		{{Box\|title=Performance optimizations\|
	~~<div style="font-weight: bold; background-color: #ffe7d6; margin: 0; border: solid 1px #ffddc6; padding: 0 0.5em 0 0.5em;">~~Performance optimizations~~</div>~~
	* [[Prefetching]]		* [[Prefetching]]
	* [[Branch prediction]]		* [[Branch prediction]]
Line 50:		Line 47:
	* [[Out-of-order execution]]		* [[Out-of-order execution]]
	* [[Register renaming]]		* [[Register renaming]]
	~~</div>~~		}}

	\| style="vertical-align: top; padding-left: 10px;" \|		\| style="vertical-align: top; padding-left: 10px;" \|
	~~<div style~~=~~"background-color: #fff7f2; border: solid 1px #ffddc6; padding: 0.5em; margin-bottom: 13px;">~~		{{Box\|title=Implementation technology\|
	~~<div style="font-weight: bold; background-color: #ffe7d6; margin: 0; border: solid 1px #ffddc6; padding: 0 0.5em 0 0.5em;">~~Implementation technology~~</div>~~
	* [[Intro to binary logic]]		* [[Intro to binary logic]]
	** [[Logic simulators]]		** [[Logic simulators]]
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	** [[Relay logic]]		** [[Relay logic]]
	* [[Exotic logic families]]		* [[Exotic logic families]]
	~~</div>~~		}}

	~~<div style~~=~~"background-color: #fff7f2; border: solid 1px #ffddc6; padding: 0.5em; margin-bottom: 13px;">~~		{{Box\|title=CPU projects\|
	~~<div style="font-weight: bold; background-color: #ffe7d6; margin: 0; border: solid 1px #ffddc6; padding: 0 0.5em 0 0.5em;">~~CPU projects~~</div>~~
	* [https://www.bigmessowires.com/bmow1/ Big Mess of Wires]		* [https://www.bigmessowires.com/bmow1/ Big Mess of Wires]
	* [http://www.homebrewcpu.com/ Magic-1]		* [http://www.homebrewcpu.com/ Magic-1]
Line 73:		Line 68:
	* [https://relaycomputer.co.uk/pages/overview.html Paul Law's relay computer]		* [https://relaycomputer.co.uk/pages/overview.html Paul Law's relay computer]
	* [http://zipcpu.com/about/zipcpu.html ZipCPU]		* [http://zipcpu.com/about/zipcpu.html ZipCPU]
	~~</div>~~		}}

	\|}		\|}

Immibis: add a bunch more placeholder links

2021-07-05T00:17:58Z

add a bunch more placeholder links

← Older revision		Revision as of 00:17, 5 July 2021
Line 11:		Line 11:
	<div style="background-color: #fff7f2; border: solid 1px #ffddc6; padding: 0.5em; margin-bottom: 13px;">		<div style="background-color: #fff7f2; border: solid 1px #ffddc6; padding: 0.5em; margin-bottom: 13px;">
	<div style="font-weight: bold; background-color: #ffe7d6; margin: 0; border: solid 1px #ffddc6; padding: 0 0.5em 0 0.5em;">Major components and concepts</div>		<div style="font-weight: bold; background-color: #ffe7d6; margin: 0; border: solid 1px #ffddc6; padding: 0 0.5em 0 0.5em;">Major components and concepts</div>
			* [[Instruction Set Architecture]]
	* [[Control unit]]		* [[Control unit]]
			** [[Instruction decoding]]
			** [[Microcode]]
	* [[ALU]]		* [[ALU]]
	* [[Memory bus]]		* [[Memory bus]]
			** [[RAM]]
			** [[Memory-mapped IO]]
			* [[External interfaces]]
			** [[UART console]]
			** [[GPIO]]
			** [[SD card storage]]
			** [[Character LCD]]
			** [[PS/2 keyboard]]
			** [[Audio output]]
			** [[VGA video]]
			** [[USB]]
			</div>

			<div style="background-color: #fff7f2; border: solid 1px #ffddc6; padding: 0.5em; margin-bottom: 13px;">
			<div style="font-weight: bold; background-color: #ffe7d6; margin: 0; border: solid 1px #ffddc6; padding: 0 0.5em 0 0.5em;">Software</div>
			* [[Writing an assembler]]
			* [[Writing an emulator]]
			</div>

			<div style="background-color: #fff7f2; border: solid 1px #ffddc6; padding: 0.5em; margin-bottom: 13px;">
			<div style="font-weight: bold; background-color: #ffe7d6; margin: 0; border: solid 1px #ffddc6; padding: 0 0.5em 0 0.5em;">Advanced instruction set</div>
			* [[Interrupts and exceptions]]
			* [[Virtual memory]]
			* [[Memory protection]]
	</div>		</div>

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	<div style="font-weight: bold; background-color: #ffe7d6; margin: 0; border: solid 1px #ffddc6; padding: 0 0.5em 0 0.5em;">Performance optimizations</div>		<div style="font-weight: bold; background-color: #ffe7d6; margin: 0; border: solid 1px #ffddc6; padding: 0 0.5em 0 0.5em;">Performance optimizations</div>
	* [[Prefetching]]		* [[Prefetching]]
			* [[Branch prediction]]
			* [[Data cache]]
	* [[Out-of-order execution]]		* [[Out-of-order execution]]
			* [[Register renaming]]
	</div>		</div>

Line 25:		Line 55:
	<div style="background-color: #fff7f2; border: solid 1px #ffddc6; padding: 0.5em; margin-bottom: 13px;">		<div style="background-color: #fff7f2; border: solid 1px #ffddc6; padding: 0.5em; margin-bottom: 13px;">
	<div style="font-weight: bold; background-color: #ffe7d6; margin: 0; border: solid 1px #ffddc6; padding: 0 0.5em 0 0.5em;">Implementation technology</div>		<div style="font-weight: bold; background-color: #ffe7d6; margin: 0; border: solid 1px #ffddc6; padding: 0 0.5em 0 0.5em;">Implementation technology</div>
	* [[Writing an emulator]]
	* [[Intro to binary logic]]		* [[Intro to binary logic]]
	** [[Logic simulators]]		** [[Logic simulators]]

Immibis at 00:10, 5 July 2021

2021-07-05T00:10:09Z

← Older revision		Revision as of 00:10, 5 July 2021
Line 25:		Line 25:
	<div style="background-color: #fff7f2; border: solid 1px #ffddc6; padding: 0.5em; margin-bottom: 13px;">		<div style="background-color: #fff7f2; border: solid 1px #ffddc6; padding: 0.5em; margin-bottom: 13px;">
	<div style="font-weight: bold; background-color: #ffe7d6; margin: 0; border: solid 1px #ffddc6; padding: 0 0.5em 0 0.5em;">Implementation technology</div>		<div style="font-weight: bold; background-color: #ffe7d6; margin: 0; border: solid 1px #ffddc6; padding: 0 0.5em 0 0.5em;">Implementation technology</div>
	* [[FPGA]]		* [[Writing an emulator]]
			* [[Intro to binary logic]]
			** [[Logic simulators]]
			* [[FPGA development]]
	* [[Intro to electronics]]		* [[Intro to electronics]]
	** [[Logic chips]]		** [[Logic chips]]

Immibis at 00:09, 5 July 2021

2021-07-05T00:09:09Z

← Older revision		Revision as of 00:09, 5 July 2021
Line 26:		Line 26:
	<div style="font-weight: bold; background-color: #ffe7d6; margin: 0; border: solid 1px #ffddc6; padding: 0 0.5em 0 0.5em;">Implementation technology</div>		<div style="font-weight: bold; background-color: #ffe7d6; margin: 0; border: solid 1px #ffddc6; padding: 0 0.5em 0 0.5em;">Implementation technology</div>
	* [[FPGA]]		* [[FPGA]]
	* [[~~7400 series logic~~]]		* [[Intro to electronics]]
	* [[~~Discrete transistor logic~~]]		** [[Logic chips]]
	** [[~~CMOS~~]]		** [[Transistor logic]]
	** [[TTL]]		** [[Relay logic]]
	* [[Relay logic]]
	* [[Exotic logic families]]		* [[Exotic logic families]]
	</div>		</div>

Immibis: add some external links

2021-07-05T00:06:28Z

add some external links

← Older revision		Revision as of 00:06, 5 July 2021
Line 15:		Line 15:
	* [[Memory bus]]		* [[Memory bus]]
	</div>		</div>

	<div style="background-color: #fff7f2; border: solid 1px #ffddc6; padding: 0.5em; margin-bottom: 13px;">		<div style="background-color: #fff7f2; border: solid 1px #ffddc6; padding: 0.5em; margin-bottom: 13px;">
	<div style="font-weight: bold; background-color: #ffe7d6; margin: 0; border: solid 1px #ffddc6; padding: 0 0.5em 0 0.5em;">Performance optimizations</div>		<div style="font-weight: bold; background-color: #ffe7d6; margin: 0; border: solid 1px #ffddc6; padding: 0 0.5em 0 0.5em;">Performance optimizations</div>
Line 31:		Line 32:
	* [[Relay logic]]		* [[Relay logic]]
	* [[Exotic logic families]]		* [[Exotic logic families]]
			</div>

			<div style="background-color: #fff7f2; border: solid 1px #ffddc6; padding: 0.5em; margin-bottom: 13px;">
			<div style="font-weight: bold; background-color: #ffe7d6; margin: 0; border: solid 1px #ffddc6; padding: 0 0.5em 0 0.5em;">CPU projects</div>
			* [https://www.bigmessowires.com/bmow1/ Big Mess of Wires]
			* [http://www.homebrewcpu.com/ Magic-1]
			* [http://megaprocessor.com/ Megaprocessor]
			* [https://monster6502.com/ Monster 6502]
			* [https://relaycomputer.co.uk/pages/overview.html Paul Law's relay computer]
			* [http://zipcpu.com/about/zipcpu.html ZipCPU]
	</div>		</div>

	\|}		\|}

Immibis: add contact info

2021-07-05T00:02:18Z

add contact info

← Older revision		Revision as of 00:02, 5 July 2021
Line 3:		Line 3:
	\|		\|
	<p style="font-size: xx-large; margin: 0;">Homebrew CPU Wiki</p>		<p style="font-size: xx-large; margin: 0;">Homebrew CPU Wiki</p>
	This main page is mostly a placeholder for now.		This main page is mostly a placeholder for now.<br>
			To get editing permission, create an account and ping immibis on IRC. irc.libera.chat #cpudev
	\|}		\|}

Immibis: Initial main page

2021-07-05T00:01:38Z

Initial main page

← Older revision		Revision as of 00:01, 5 July 2021
Line 1:		Line 1:
	<~~strong~~>~~MediaWiki has been installed.~~</~~strong~~>		<!-- Box concept copied from osdev wiki, which probably copied it from Wikipedia -->
			{\| style="width: 100%; text-align: center; background-color: #fff7f2; border: solid 1px #ffddc6; margin-bottom: 14px;" \|
			\|
			<p style="font-size: xx-large; margin: 0;">Homebrew CPU Wiki</p>
			This main page is mostly a placeholder for now.
			\|}

	~~Consult the [https~~:~~//www~~.~~mediawiki~~.~~org~~/~~wiki~~/~~Special~~:~~MyLanguage~~/~~Help:Contents User's Guide~~] ~~for information on using the wiki software.~~		{\| style="width: 100%;" \|
			\| style="vertical-align: top;" \|
			<div style="background-color: #fff7f2; border: solid 1px #ffddc6; padding: 0.5em; margin-bottom: 13px;">
			<div style="font-weight: bold; background-color: #ffe7d6; margin: 0; border: solid 1px #ffddc6; padding: 0 0.5em 0 0.5em;">Major components and concepts</div>
			* [[Control unit]]
			* [[ALU]]
			* [[Memory bus]]
			</div>
			<div style="background-color: #fff7f2; border: solid 1px #ffddc6; padding: 0.5em; margin-bottom: 13px;">
			<div style="font-weight: bold; background-color: #ffe7d6; margin: 0; border: solid 1px #ffddc6; padding: 0 0.5em 0 0.5em;">Performance optimizations</div>
			* [[Prefetching]]
			* [[Out-of-order execution]]
			</div>

	== ~~Getting started~~ ==		\| style="vertical-align: top; padding-left: 10px;" \|
	* [https:~~//www~~.~~mediawiki~~.~~org~~/~~wiki/Special:MyLanguage/Manual:Configuration_settings Configuration settings list~~]		<div style="background-color: #fff7f2; border: solid 1px #ffddc6; padding: 0.5em; margin-bottom: 13px;">
	* [~~https://www.mediawiki.org/wiki/Special:MyLanguage/Manual:FAQ MediaWiki FAQ~~]		<div style="font-weight: bold; background-color: #ffe7d6; margin: 0; border: solid 1px #ffddc6; padding: 0 0.5em 0 0.5em;">Implementation technology</div>
	* [~~https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce MediaWiki release mailing list~~]		* [[FPGA]]
	* [~~https://www.mediawiki.org/wiki/Special:MyLanguage/Localisation#Translation_resources Localise MediaWiki for your language~~]		* [[7400 series logic]]
	* [~~https:~~/~~/www.mediawiki.org/wiki/Special:MyLanguage/Manual:Combating_spam Learn how to combat spam on your wiki]~~		* [[Discrete transistor logic]]
			** [[CMOS]]
			** [[TTL]]
			* [[Relay logic]]
			* [[Exotic logic families]]
			</div>

			\|}