MME U880

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CPU U880D.

The U880 is an 8-bit - microprocessor , which by VEB Microelectronics "Karl Marx" Erfurt (abbreviated MME ; operation in combine microelectronics Erfurt ) in the GDR was prepared. Production began in 1980 at VEB Funkwerk Erfurt (abbreviated to FWE ), which was then renamed VEB Mikroelektronik "Karl Marx" in 1983. The U880 is an unlicensed replica of the Zilog Z80 processor . The differences to the Zilog Z80 are limited to special details such as a non-set carry flag for the OUTI command.

Processor variants

The U880; Size 4513 µm × 4251 µm (first die-shrink 1984); Inscription on the lower edge: "U880 / 5 HL JH 84"
The U880; Size 3601 µm × 3409 µm (second die-shrink 1990); Inscription on the lower edge: "U880 / 6 HL MME 1990"

The U880 is manufactured using n-MOS technology and is in a DIL 40 plastic housing with a pin grid of 2.5 mm (export versions have the pin grid of 2.54 mm that is common in the West; the Russian versions were also available in ceramic housing used).

Temperature range Max. Clock frequency Designations
−00 ° C to +40 ° C 1.0 MHz UD880D, (a) UB880D S1 (a)
−00 ° C to +70 ° C 2.5 MHz U880D, (b) UB880D, 80-CPU (c)
4.0 MHz UA880D, (d) 80A-CPU (c)
8.0 MHz U880DC08, (e) Thesys Z80H (f)
−25 ° C to +85 ° C 2.5 MHz VB880D (d)
(a) Seizure type for hobbyists (the measurement data of the circuit did not meet the standard)
(b)original name; the measure class B was often indicated by a cross-printed 00B (as in the title picture above)
(c) Export version with a pin grid of 2.54 mm
(d) Production from 1984
(e)1992 ERMIC made
(f)manufactured by Thesys after 1992

The military version of the U880 is marked with an additional MEK 4 stamp.

  • UA880D (1986)

  • UB880D S1 - hobbyist type (1989)

  • UB880D - military version with MEK 4 stamp (1989)

  • VB880D - extended temperature range (1990)

  • 80A-CPU - export version

  • U880DC08 (1992)

Peripheral modules

Floppy disk controller U8272D04 (1989)
Graphics controller U82720DC03 (1989)

In the VEB Microelectronics “Karl Marx” a number of peripheral components for the U880 were also manufactured. The designations UA, UB, VB, 80 and 80A correspond to the temperature ranges and clock frequencies as above for the processor variants . Seizure types are also marked with S1 .

designation Start of production International comparison type description
U855D, (f) UA855D, UB855D, UD855D, (g) VB855D, UB855D S1, (g) 80-PIO, (h) 80A-PIO (h) 1980 Zilog Z80 PIO parallel interface
U8560D, (f) UA8560D, UB8560D, VB8560D, UB8560D S1, (g) 80-SIO / 0, (h) 80A-SIO / 0 (h) 1980 Zilog Z80 SIO / 0 serial interface
U857D, (f) UA857D, UB857D, VB857D, UB857D S1, (g) 80-CTC, (h) 80A-CTC (h) 1980 Zilog Z80 CTC Counter / timer
UA858D, UB858D, UB857D S1, (g) 80-DMA, (h) 80A-DMA (h) 1984 Zilog Z80 DMA DMA controller
U8561D, (f) UB8561D 1980 Zilog Z80 SIO / 1 serial interface
UA8563D, UB8563D, VB8563D, UB8563D S1, (g) 80-DART, (h) 80A-DART (h) 1984 Zilog Z80 DART asynchronous serial interface
U8272D04, U8272D08 1987 Intel 8272 Floppy disk controller
U82530DC04, U82530DC06 1988 Zilog SCC serial interface
U82536DC04 1988 Zilog CIO Counter / timer and parallel interface
U82720DC02, U82720DC03, U82720DC04 1987 Intel 82720 Graphics controller
(f)original name; the measure class B was often indicated by a cross-printed 00B (as in the title picture above)
(G) Seizure type for hobbyists (the measurement data of the circuit did not meet the standard)
(H) Export version with a pin grid of 2.54 mm

use

80A CPU on the mainboard of a self-made PC from the GDR

The U880 was the general-purpose processor in the GDR and there was hardly any application for which it was not used. Examples are:

Before 1990, the U880 was the only Z80-compatible microprocessor in the Comecon countries (Poland, Czechoslovakia, Hungary, Romania and the Soviet Union only made replicas of the Intel 8080 ). Examples of using the U880 in devices outside the GDR are:

  • Poland: Home computer Mera-Elzab Meritum, Elwro 700, Elwro 800 Junior
  • Czechoslovakia: TESLA Ondra home computer
  • Hungary: Microkey Primo A-64
  • Romania: Electromagnetica JET home computer
  • Bulgaria: Office computer ISOT-1031C

Further development

Microprocessor T34WM1 (Angstrem Selenograd, 1991)

Just as Zilog developed the 16-bit processors Z8001 / Z8002 as the successor to the Z80 , VEB Mikroelektronik "Karl Marx" Erfurt produced replicas of these processors with the designations U8001 / U8002. Just like their counterparts, the U8001 / U8002 were not used as often as the U880.

When MS-DOS began to establish itself as the standard operating system, only the Soviet K1810WM86 was available as a replica of the Intel 8086 in the Comecon countries . VEB Mikroelektronik "Karl Marx" then developed the U80601 as a replica of the Intel 80286 . In addition, a power-saving CMOS version of the U880 with the designation U 84C00 DC including the corresponding peripheral modules ( U 84C20 DC - PIO , U 84C30 DC - CTC, U 84C40 DC - SIO) has been developed. Due to the upheaval caused by German reunification , these projects did not go beyond pre-series production. VEB Mikroelektronik "Karl Marx" (MME) was privatized in 1990 under the name ERMIC GmbH . A large part of ERMIC was again merged into Thesys Gesellschaft für Mikroelektronik mbH in 1992 . ERMIC and Thesys continued the production of the NMOS version of the U880, whereby ERMIC continued to use the MME imprint or the Funkwerk Erfurt logo on its products. A die-shrink with the internal designation U880 / 6 was completed in 1990 and then went into production. The smaller chip structures enabled a higher clock frequency of up to 8 MHz for the U880DC08, which was later sold as the Thesys Z80H.

In the period from around 1991 to 1993, unmasked U880 chips were delivered to Russia and the Ukraine and capped there. Initially, circuits were labeled with the chip version U880 / 5 as 80A CPU and T34WM1 ( Russian Т34ВМ1 ). Later circuits with the chip version U880 / 6 received the official designation KR1858WM1 ( Russian КР1858ВМ1 ) for the plastic housing and KM1858WM1 ( Russian КМ1858ВМ1 ) for the ceramic housing. Manufacturers of these circuits have included Angstrem Zelenograd , Kwasar Kiev and WSPP Voronezh .

See also

literature

  • Heiko Kieser, Michael Meder: Microprocessor technology. Structure and use of the U880 microprocessor system . Verlag Technik Berlin, 1986, ISBN 3-341-00153-0 (with extensive description and programming instructions for the circuit family).

Individual evidence

  1. ↑ Jörg Berkner: The semiconductor industry in the GDR . Hüthig GmbH. April 12, 2016. Retrieved November 7, 2017.
  2. ↑ a b c d e W. E. Schlegel: Leipzig Spring Fair 1980 - construction elements . In: VEB Verlag Technik (Hrsg.): Radio television electronics . 29, No. 6, 1980, ISSN  0033-7900 , p. 344.
  3. ^ Honorary name "Karl Marx" for the Erfurt company . In: Neues Deutschland , October 6, 1983. Retrieved November 3, 2017. 
  4. ↑ a b c d e RFT semiconductor components 1981 . elektronik export-import, 1981, pp. 20–21, 28–33 (accessed on January 16, 2018).
  5. ↑ a b c d e f g h i j k l m n o p q r s t u RFT Active electronic components 1988 . VEB Kombinat Mikroelektronik, July 1987, pp. 243-258, 310-313, 326-328 (accessed January 16, 2018).
  6. ↑ a b UD 880 and UD 855 . In: VEB Verlag Technik (Hrsg.): Radio television electronics . 35, No. 2, 1986, ISSN  0033-7900 , p. 70.
  7. ↑ a b c d Unipolar amateur IS (overview) . In: Military Publishing House of the GDR (ed.): Funkamateur . No. 1, 1989, ISSN  0016-2833 , pp. 27-28. Retrieved January 16, 2018.
  8. ↑ a b Re: identification of IS . In: VEB Verlag Technik (Hrsg.): Radio television electronics . 33, No. 12, 1984, ISSN  0033-7900 , p. 750.
  9. ↑ a b c W. E. Schlegel: Leipzig Spring Fair 1984 - construction elements . In: VEB Verlag Technik (Hrsg.): Radio television electronics . 33, No. 6, 1984, ISSN  0033-7900 , pp. 345-346.
  10. ↑ a b c d e f g Peripheral circuits . Robotrontechnik.de. January 3, 2018. Accessed February 23, 2018.
  11. ↑ Manfred Kramer: Practical microcomputer technology . Military Publishing House of the GDR , February 15, 1986, ISBN 3-327-00361-0 , p. 214.
  12. ^ A b W. E. Schlegel: Leipziger spring fair 1987 - construction elements . In: VEB Verlag Technik (Hrsg.): Radio television electronics . 36, No. 6, 1987, ISSN  0033-7900 , pp. 345-346.
  13. ↑ a b c d e Microelectronics complete overview . Application Center Electronics Berlin, 1990 (accessed January 17, 2018).
  14. ↑ a b W. E. Schlegel: Leipzig Spring Fair 1988 - construction elements . In: VEB Verlag Technik (Hrsg.): Radio television electronics . 37, No. 6, 1988, ISSN  0033-7900 , p. 345.
  15. ↑ Mera Elzab: Meritum . HCM. Retrieved January 13, 2018.
  16. ^ WE Schlegel: 57th Poznań International Fair 1985 . In: VEB Verlag Technik (Hrsg.): Radio television electronics . 34, No. 10, 1985, ISSN  0033-7900 , pp. 661-662.
  17. ↑ Elwro 800 Junior . MCbx Old Computer Collection. Retrieved February 2, 2018.
  18. ↑ 28th Brno International Engineering Fair . In: VEB Verlag Technik (Hrsg.): MP microprocessor technology . 1, No. 1, 1987, ISSN  0233-2892 , p. 29. Accessed February 1, 2018.
  19. ^ WE Schlegel: 26th International Machine Fair in Brno 1984 . In: VEB Verlag Technik (Hrsg.): Radio television electronics . 34, No. 1, 1985, ISSN  0033-7900 , pp. 57-58.
  20. ^ Electro Magnetica: Jet . HCM. Retrieved January 13, 2018.
  21. ^ B. Kasper, V. Löschner: Leipziger spring fair 1985 . In: VEB Verlag Technik (Hrsg.): Radio television electronics . 34, No. 6, 1985, ISSN  0033-7900 , p. 350.
  22. ↑ U84C00 . March 27, 2013. Retrieved January 17, 2018.
  23. ↑ MME U84C00 . June 22, 2008. Retrieved January 17, 2018.
  24. ↑ a b Kombinat Mikroelektronik, Erfurt-Enzyklopädie, Wiki ( Memento from September 27, 2007 in the Internet Archive )
  25. ↑ 80A-CPU MME ( ru ) Музей электронных раритетов. Retrieved October 29, 2019.
  26. ↑ Т34ВМ1 ( ru ) Музей электронных раритетов. Retrieved October 29, 2019.
  27. ↑ a b 1858ая серия ( ru ) Музей электронных раритетов. Retrieved October 29, 2019.

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