Editing 4-bit computing (section)

== References ==
{{reflist|refs=
<ref name="Mack_2005">{{cite web |title=The Microcomputer Revolution |author-first=Pamela E. |author-last=Mack |date=2005-11-30 |url=http://www.clemson.edu/caah/history/FacultyPages/PamMack/lec122/micro.htm |access-date=2009-12-23}}</ref>
<ref name="Hofstra_History">{{cite web |title=History in the Computing Curriculum |url=http://www.hofstra.edu/pdf/comphist_9812tla6.pdf |access-date=2017-06-22 |archive-url=https://web.archive.org/web/20110719211222/http://www.hofstra.edu/pdf/CompHist_9812tla6.PDF |archive-date=2011-07-19 |url-status=dead}}</ref>
<ref name="TI_1976_TMS1000">{{cite book |url=http://blog.kevtris.org/blogfiles/TMS_1000_Data_Manual.pdf |title=TMS 1000 Series Data Manual |date=December 1976 |publisher=[[Texas Instruments]] |access-date=2013-07-20}}</ref>
<ref name="UT_Forth">{{Cite web|url=http://www.ultratechnology.com/chips.htm|title=Forth Chips|website=www.ultratechnology.com}}</ref>
<ref name="ISOIEC9899_1999_1">{{cite book |title=ISO/IEC 9899:1999 specification |at=p. 20, §&nbsp;5.2.4.2.1 |url=https://c0x.shape-of-code.com/5.2.4.2.1.html |access-date=2023-07-24}}</ref>
<ref name="ISOIEC9899_1999_2">{{cite book |title=ISO/IEC 9899:1999 specification |at=p. 37, §&nbsp;6.2.6.1 (4) |url=https://c0x.shape-of-code.com/6.2.6.1.html |access-date=2023-07-24}}</ref>
<ref name="Cline">{{cite web |author-first=Marshall |author-last=Cline |url=http://www.parashift.com/c++-faq-lite/bytes-review.html |title=C++ FAQ: the rules about bytes, chars, and characters}}</ref>
<ref name="CPP">{{cite web |url=http://www.cplusplus.com/forum/general/51911/ |title=4-bit integer |publisher=cplusplus.com |access-date=2014-11-21}}</ref>
<ref name="Shima_Z80">{{cite web |author-first1=Masatoshi |author-last1=Shima |author-first2=Federico |author-last2=Faggin |author-first3=Ralph |author-last3=Ungermann |author-first4=Michael |author-last4=Slater |url=https://archive.computerhistory.org/resources/text/Oral_History/Zilog_Z80/102658073.05.01.pdf |title=Zilog Oral History Panel on the Founding of the Company and the Development of the Z80 Microprocessor |date=2007-04-27}}</ref>
<ref name="Shirriff_Z80">{{cite web |author-first=Ken |author-last=Shirriff |url=http://www.righto.com/2013/09/the-z-80-has-4-bit-alu-heres-how-it.html |title=The Z-80 has a 4-bit ALU}}</ref>
<ref name="HPM_Saturn">{{cite web |url=http://www.hpmuseum.org/saturn.htm |title=The Saturn Processor |access-date=2015-12-23}}</ref>
<ref name="Grack_Saturn">{{cite web |url=http://grack.com/writings/hp48/GuidetotheSaturnProcessor.html |title=Guide to the Saturn Processor |access-date=2014-01-14}}</ref>
<ref name="HPCalc_Saturn">{{cite web |url=http://www.hpcalc.org/details.php?id=1693 |title=Introduction to Saturn Assembly Language |access-date=2014-01-14}}</ref>
<ref name="Cateye">{{cite web |url=http://cateye.com/images/manual/CC-COM10W_ENG_v3.pdf |title=Cateye Commuter Manual |access-date=2014-02-11}}</ref>
<ref name="RenesasPD67">{{Cite web|url=http://documentation.renesas.com/doc/DocumentServer/U14935EJ2V1DS00.pdf|title=μPD67, 67A, 68, 68A, 69 4-bit single-chip microcontroller for infrared remote control transmission|website=documentation.renesas.com|archive-url=https://web.archive.org/web/20160106205219/http://documentation.renesas.com/doc/DocumentServer/U14935EJ2V1DS00.pdf|archive-date=2016-01-06}}</ref>
<ref name="Haskell_MC">{{cite web |url=http://cse.secs.oakland.edu/haskell/CSE171/Lectures/Fall2004/L12.2%20Microcontrollers.ppt |author-last=Haskell |author-first=Richard |title=Introduction to Digital Logic and Microprocessors (Lecture 12.2) |access-date=2014-02-11 |archive-url=https://web.archive.org/web/20140222063433/http://cse.secs.oakland.edu/haskell/CSE171/Lectures/Fall2004/L12.2%20Microcontrollers.ppt |archive-date=2014-02-22 |url-status=dead}}</ref>
<ref name="Atmel_MARC4_Image">{{cite web |url=http://www.atmel.com/Images/doc4747.pdf |archive-url=https://web.archive.org/web/20141215021454/http://www.atmel.com/Images/doc4747.pdf |archive-date=2014-12-15 |title=MARC4 4-bit Microcontrollers – Programmer's Guide |publisher=[[Atmel]] |access-date=2014-01-14 |url-status=dead}}</ref>
<ref name="Atmel_MARC4_Product">{{cite web |url=http://www.atmel.com/products/MARC4/ |title=MARC4 4-Bit Architecture |publisher=[[Atmel]] |archive-url=https://web.archive.org/web/20090531214448/http://atmel.com/products/MARC4/ |archive-date=2009-05-31 |url-status=dead}}</ref>
<ref name="Atmel_EOL">{{cite web |url=http://www.atmel.com/images/he140901.pdf |title=Product End-of-Life (EOL) Notification |date=2014-03-07 |publisher=[[Atmel]] |archive-url=https://web.archive.org/web/20160807174435/http://www.atmel.com/images/he140901.pdf |archive-date=2016-08-07 |url-status=dead}}</ref>
<ref name="Renesas_uPD6P9">{{Cite web|url=http://documentation.renesas.com/doc/DocumentServer/U15144EJ1V1DS00.pdf|title=μPD6P9 4-bit single-chip microcontroller for infrared remote control transmission|website=documentation.renesas.com|archive-url=https://web.archive.org/web/20160327192018/http://documentation.renesas.com/doc/DocumentServer/U15144EJ1V1DS00.pdf|archive-date=2016-03-27}}</ref>
<ref name="Renesas_uPD17240">{{Cite web|url=http://documentation.renesas.com/doc/DocumentServer/U15002EJ1V1DS00.pdf|title=μPD17240, 17241, 17242, 17243, 17244, 17245, 17246 4-bit single-chip microcontrollers for small general-purpose infrared remote control transmitters|website=documentation.renesas.com|archive-url=https://web.archive.org/web/20160327182841/http://documentation.renesas.com/doc/DocumentServer/U15002EJ1V1DS00.pdf|archive-date=2016-03-27}}</ref>
<ref name="Renesas_Remote">{{Cite web|url=http://documentation.renesas.com/doc/DocumentServer/U14372EJ5V0PF00.pdf|title=Microcontrollers for Remote Controllers|website=documentation.renesas.com|archive-url=https://web.archive.org/web/20131219191519/http://documentation.renesas.com/doc/DocumentServer/U14372EJ5V0PF00.pdf|archive-date=2013-12-19}}</ref>
<ref name="Necel_ROMless">{{cite web |url=http://www.necel.com/micro/en/product/mr_48_remocon.html |title=Mask ROM/ROMless Products 4/8bit Remote Control |url-status=dead |archive-url=https://web.archive.org/web/20081028181219/http://www.necel.com/micro/en/product/mr_48_remocon.html |archive-date=2008-10-28}}</ref>
<ref name="Cravotta">{{cite web |author-first=Robert |author-last=Cravotta |url=http://www.embeddedinsights.com/directory/epd-downloads.php |title=Embedded Processing Directory}}</ref>
<ref name="EM6580_1">{{cite web |url=http://www.emmarin.com/Products.asp?IdProduct=215 |title=EM6580 |access-date=2013-05-12 |archive-url=https://web.archive.org/web/20131219221418/http://www.emmarin.com/Products.asp?IdProduct=215 |archive-date=2013-12-19 |url-status=dead}}</ref>
<ref name="EM6580_2">{{Cite web|url=https://www.emmicroelectronic.com/product/multi-io/em6580|title=EM6580}}</ref>
<ref name="EM6682">{{Cite web|url=https://www.emmicroelectronic.com/product/multi-io/em6682|title=EM6682}}</ref>
<ref name="Sharp_1990">{{cite book |url=http://bitsavers.org/components/sharp/_dataBooks/1990_Sharp_Microcomputers_Data_Book.pdf |title=Sharp Microcomputers Data Book |date=September 1990 |access-date=2018-01-05}}</ref>
}}