MC14500B (ICU) is well-suited to the implementation of ladder logic, and thus could be used to replace relay systems and programmable logic controllers, also intended for serial data manipulation.[2] The processor supports 16 commands, operating at a frequency of 1 MHz.[2] The MC14500B unit does not include a program counter (PC); instead, a clock signal drives a separate PC chip; therefore the size of supported memory is dependent on the implementation of that chip. It was still in production in 1995.[2]
The ICU architecture is similar to that of the DECPDP-14 computer.
Developers
The ICU was conceived by Vern Gregory in the mid-1970s while working as an engineer in a marketing / applications group of Motorola Semiconductor Products Sector in Phoenix, Arizona, USA; Brian Dellande originated circuit and sub-routine designs, and co-wrote the manual; Ray DiSilvestro was the bench technician; Terry Malarkey provided management support.[citation needed]
In the CMOS Logic Division in Austin, Texas, USA (where it was made) Phil Smith was the chip designer; Mike Hadley provided product applications support.[citation needed]
Derivatives
A form of the design served as an embedded controller in a custom automotive chip made for Nippon Denso by Motorola—Japan.
I.P.R.S. Băneasa manufactured a clone of the MC14500B with the designation βP14500 in IIL technology (rather than the original CMOS).[3]
Notable uses
One of the computers known to be based on this processor is the educational WDR 1-bit computer (512 bits of RAM, LED, I/O, keyboard).[4]
A modern take, in retro style, of a computer based on this processor is the PLC14500-Nano. It is certified as Open Source Hardware PL000011 so anyone can learn from its design and can freely build it.
^Gregory, Vernon "Vern" C.; Dellande, Brian; DiSilvestro, Ray; Malarkey, Terry; Smith, Phil; Hadley, Mike (1977). Motorola MC14500B Industrial Control Unit Handbook - Theory and Operation of a CMOS one-bit processor compatible with B series CMOS devices(PDF). Motorola Semiconductor Products Inc. 33-B78/8.0. (PDF) from the original on 2022-02-20. Retrieved 2017-05-20. (2+iii+106+1 pages) (NB. Also available in German language under the title "Motorola MC14500B Industrial Control Unit Handbuch - Theorie und Anwendung eines Ein-Bit-CMOS-Prozessors".)
^ abcIndustrial Control Unit MC14500B(PDF). Motorola CMOS Logic Data. Semiconductor Technical Data (revision 3 ed.). Motorola. 1995. pp. 306–313. (PDF) from the original on 2017-05-20. Retrieved 2012-08-01.
^Cracea, Dumitru; Raiu, Dan (1990). Full Line Condensed Catalog 1990(PDF). I.P.R.S. Băneasa. (PDF) from the original on 2022-05-11. Retrieved 2022-06-17.
^Ludwig, Volker; Paschenda, Klaus; Schepers, Heinz; Terglane, Hermann-Josef; Grannemann, Klaus; John, Burkhard; Komar, Hermann; Meinersen, Ludwig (1986). Written at Neuss & Recklinghausen, Germany. Fast alles über den WDR-1-Bit-Computer(PDF) (in German). Neuss, Germany: DATANorf. (PDF) from the original on 2017-05-20. Retrieved 2017-05-20.
Further reading
Gregory, Vernon "Vern" C. (1979-05-08) [1977-01-24]. "Industrial control processor" (PDF). Motorola, Inc. US patent 4153942A. (PDF) from the original on 2022-06-17. Retrieved 2022-06-17. [2] (also: US 05/761,738; DE2801853A1)
Ludwig, Volker; Paschenda, Klaus, Remmelmann, Alexander (ed.), Bit und Byte - Wir bauen einen Computer [Bit and Byte - We build a computer] (TV series (6 parts)) (in German), WDR-Schulfernsehen
Mueller, Dieter (2005) [2004]. "The famous/infamous MC14500". from the original on 2017-08-03. Retrieved 2018-07-18.
Mueller, Dieter (2008). "MC14500 and arithmetic". from the original on 2017-05-20. Retrieved 2018-07-18.
Mueller, Dieter (2008). "A MC14500 modification". from the original on 2017-03-20. Retrieved 2018-07-18.
External links
Schembri, Thierry; Bizoirre, Sylvain; Boisseau, Olivier; Chauvaud, Pierre-Emmanuel. . OLD-COMPUTERS.COM. Archived from the original on 2017-05-20. Retrieved 2017-05-20.
"MC14500 - Motorola". Wikichip. from the original on 2017-05-20. Retrieved 2017-05-20.
. Wikichip. Archived from the original on 2017-05-20. Retrieved 2017-05-20.
"MC14500 ISA - Motorola". Wikichip. from the original on 2017-05-20. Retrieved 2017-05-20.
Shirriff, Ken (February 2021). "A one-bit processor explained: reverse-engineering the vintage MC14500B". from the original on 2022-06-17. Retrieved 2022-06-17.
May 20, 2023
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The MC14500B Industrial Control Unit ICU is a CMOS one bit microprocessor designed by Motorola for simple control applications in 1977 1 1 bit microprocessor MC14500BCP Contents 1 Overview 2 Developers 3 Derivatives 4 Notable uses 5 See also 6 References 7 Further reading 8 External linksOverview EditMC14500B ICU is well suited to the implementation of ladder logic and thus could be used to replace relay systems and programmable logic controllers also intended for serial data manipulation 2 The processor supports 16 commands operating at a frequency of 1 MHz 2 The MC14500B unit does not include a program counter PC instead a clock signal drives a separate PC chip therefore the size of supported memory is dependent on the implementation of that chip It was still in production in 1995 2 The ICU architecture is similar to that of the DEC PDP 14 computer Developers EditThe ICU was conceived by Vern Gregory in the mid 1970s while working as an engineer in a marketing applications group of Motorola Semiconductor Products Sector in Phoenix Arizona USA Brian Dellande originated circuit and sub routine designs and co wrote the manual Ray DiSilvestro was the bench technician Terry Malarkey provided management support citation needed In the CMOS Logic Division in Austin Texas USA where it was made Phil Smith was the chip designer Mike Hadley provided product applications support citation needed Derivatives EditA form of the design served as an embedded controller in a custom automotive chip made for Nippon Denso by Motorola Japan I P R S Băneasa manufactured a clone of the MC14500B with the designation bP14500 in IIL technology rather than the original CMOS 3 Notable uses EditOne of the computers known to be based on this processor is the educational WDR 1 bit computer 512 bits of RAM LED I O keyboard 4 A modern take in retro style of a computer based on this processor is the PLC14500 Nano It is certified as Open Source Hardware PL000011 so anyone can learn from its design and can freely build it See also EditWDR paper computer WDR Computerclub NDR computerReferences Edit Gregory Vernon Vern C Dellande Brian DiSilvestro Ray Malarkey Terry Smith Phil Hadley Mike 1977 Motorola MC14500B Industrial Control Unit Handbook Theory and Operation of a CMOS one bit processor compatible with B series CMOS devices PDF Motorola Semiconductor Products Inc 33 B78 8 0 Archived PDF from the original on 2022 02 20 Retrieved 2017 05 20 1 2 iii 106 1 pages NB Also available in German language under the title Motorola MC14500B Industrial Control Unit Handbuch Theorie und Anwendung eines Ein Bit CMOS Prozessors a b c Industrial Control Unit MC14500B PDF Motorola CMOS Logic Data Semiconductor Technical Data revision 3 ed Motorola 1995 pp 306 313 Archived PDF from the original on 2017 05 20 Retrieved 2012 08 01 Cracea Dumitru Raiu Dan 1990 Full Line Condensed Catalog 1990 PDF I P R S Băneasa Archived PDF from the original on 2022 05 11 Retrieved 2022 06 17 Ludwig Volker Paschenda Klaus Schepers Heinz Terglane Hermann Josef Grannemann Klaus John Burkhard Komar Hermann Meinersen Ludwig 1986 Written at Neuss amp Recklinghausen Germany Fast alles uber den WDR 1 Bit Computer PDF in German Neuss Germany DATANorf Archived PDF from the original on 2017 05 20 Retrieved 2017 05 20 Further reading EditGregory Vernon Vern C 1979 05 08 1977 01 24 Industrial control processor PDF Motorola Inc US patent 4153942A Archived PDF from the original on 2022 06 17 Retrieved 2022 06 17 2 also US 05 761 738 DE2801853A1 Ludwig Volker Paschenda Klaus Remmelmann Alexander ed Bit und Byte Wir bauen einen Computer Bit and Byte We build a computer TV series 6 parts in German WDR Schulfernsehen Mueller Dieter 2005 2004 The famous infamous MC14500 Archived from the original on 2017 08 03 Retrieved 2018 07 18 Mueller Dieter 2008 MC14500 and arithmetic Archived from the original on 2017 05 20 Retrieved 2018 07 18 Mueller Dieter 2008 A MC14500 modification Archived from the original on 2017 03 20 Retrieved 2018 07 18 External links EditSchembri Thierry Bizoirre Sylvain Boisseau Olivier Chauvaud Pierre Emmanuel WDR 1 Bit Computer OLD COMPUTERS COM Archived from the original on 2017 05 20 Retrieved 2017 05 20 MC14500 Motorola Wikichip Archived from the original on 2017 05 20 Retrieved 2017 05 20 MC14500B Motorola Wikichip Archived from the original on 2017 05 20 Retrieved 2017 05 20 MC14500 ISA Motorola Wikichip Archived from the original on 2017 05 20 Retrieved 2017 05 20 Shirriff Ken February 2021 A one bit processor explained reverse engineering the vintage MC14500B Archived from the original on 2022 06 17 Retrieved 2022 06 17 Retrieved from https en wikipedia org w index php title Motorola MC14500B amp oldid 1150898581 WDR 1, wikipedia, wiki, book, books, library,
