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FlexOS

December 16, 2023

Not to be confused with FLEX (operating system).

FlexOS is a discontinued modular real-time multiuser multitasking operating system (RTOS) designed for computer-integrated manufacturing, laboratory, retail and financial markets. Developed by Digital Research's Flexible Automation Business Unit in Monterey, California, in 1985,[2][3] the system was considered to become a successor of Digital Research's earlier Concurrent DOS, but with a new, modular, and considerably different system architecture and portability across several processor families.[4] Still named Concurrent DOS 68K and Concurrent DOS 286, it was renamed into FlexOS on 1 October 1986 to better differentiate the target audiences. FlexOS was licensed by several OEMs who selected it as the basis for their own operating systems like 4680 OS, 4690 OS, S5-DOS/MT and others. Unrelated to FlexOS, the original Concurrent DOS system architecture found a continuation in successors like Concurrent DOS XM and Concurrent DOS 386 as well.

FlexOS
DeveloperDigital Research
Written inC
Working stateDiscontinued
Source modelClosed source
Initial release1986; 37 years ago (1986)
Latest release2.33 / May 1998; 25 years ago (1998-05)
Latest preview2.34 / 1999; 24 years ago (1999)
Marketing targetIndustrial, PoS
Available inEnglish
PlatformsIntel 80186, Intel 80286, Intel 80386, Motorola 68000, V60, V70
Kernel typemodular
Default
user interface		various frontends, X/GEM
LicenseProprietary
Preceded byConcurrent DOS 286, Concurrent DOS 68K, Concurrent DOS V60[1]
Succeeded byS5-DOS/MT, 4680 OS, 4690 OS

Overview edit

Concurrent DOS 286, Concurrent DOS 68K and FlexOS were designed by Francis "Frank" R. Holsworth (using siglum FRH).[5][6] Like Portable CP/M, Concurrent DOS 286, Concurrent DOS 68K and Concurrent DOS V60,[1][7] FlexOS was written in C for higher portability across hardware platforms, and it featured very low interrupt latency and fast context switching.[8]

The original protected mode FlexOS 286 version 1.3[9] was designed for host machines equipped with 286 CPUs, and with adaptations for NEC V60, NEC V70 and Motorola 68000 processors planned.[4][1][7] FlexOS 286 executables using the system's native INT DCh (INT 220) application program interface had the filename extension .286. A CP/M API front-end (FE) was available as well,[10] using the extension .CMD for executables. (A filename extension of .68K was reserved for FlexOS 68K, a file extension derived from Concurrent DOS 68K as of 1986.[11][7][12][10])

In May 1987, FlexOS version 1.31 was released for 80286 machines.[13] The developer version required an IBM PC/AT-compatible machine with 640 KB of conventional and 512 KB of extended memory, and either a (monochrome) CGA or an EGA graphics adapter.

FlexOS supported a concept of dynamically loadable and unloadable subdrivers, and it came with driver prototypes for floppies, hard disks, printers, serial interfaces, RAM disks, mice and console drivers.

During boot, the FLEX286.SYS kernel would load the resource managers and device drivers specified in the CONFIG.SYS binary file (not to be mixed up with the similarly named CONFIG.SYS configuration file under DOS), and its shell (COMMAND.286) would execute a CONFIG.BAT startup batch job instead of the common AUTOEXEC.BAT.

FlexOS's optional DOS emulator provided limited PC DOS 2.1 compatibility for DOS .COM and .EXE programs.[9] Certain restrictions applied in "8086 emulation mode" since these programs were executed in the processor's protected mode. Due to bugs in earlier steppings of the Intel 80286, the FlexOS 286 DOS front-end required at least the 80286 E2 stepping to function properly (see LOADALL).[9] These problems had already caused delays in the delivery of Concurrent DOS 286 earlier.[14][15]

The system optionally supported a multitasking GEM VDI for graphical applications.[9][16]

FlexOS 1.31 could be linked with none, either or both of these two modules. FlexOS 1.31 also supported FlexNet.

By June 1987 there were also versions 1.0 of FlexOS 386 (for hosts) and FlexOS 186 (for remote cell controllers).[8] FlexOS 386 provided a windowing feature, and offered PC DOS 3.2 and GEM compatibility.[8]

FlexOS 286 and FlexOS 386 versions 2.0 were registered on 3 July 1989.

Among the major FlexOS customers in 1990/1991 were FANUC, IBM, ICL, Nixdorf, Siemens, TEC, Thorn EMI Software and Micrologic.[3][17]

Novell bought Digital Research for US$80 million[18] in July 1991.[19][3][20][18]

X/GEM for FlexOS release 1.0 (a.k.a. X/GEM FlexOS 286 and 386) and FlexNet were registered on 21 December 1992.

FlexOS was used as the primary test platform for the new Novell Embedded Systems Technology (NEST).[21]

When Novell decided to abandon further development of the various Digital Research operating systems such as Multiuser DOS (a successor to Concurrent DOS) and Novell DOS (a successor to DR DOS), they sold FlexOS off to the Santa Clara, California-based Integrated Systems Inc. (ISI) for US$3 million in July 1994.[22] The deal comprised a direct payment of half this sum as well as shares representing 2% of the company. The company already had pSOS+, another modular real-time multitasking operating system for embedded systems, but they continued to maintain FlexOS as well.[22] FlexOS version 2.33 was current as of May 1998 and with FlexOS 2.34 to be released soon after with added support for faster CPUs, 64 MB of memory, EIDE and ATAPI CDROM drives.

Integrated Systems was bought by their competitor Wind River Systems in February 2000.

Commands edit

The following list of commands is supported by FlexOS:[23]

Versions edit

Known FlexOS versions include:

Motorola 68000 / Freescale/NXP ColdFire MCF5251[24] platform:

Intel 80286 platform:

  • MP/M-286 (1982)[28]
  • Concurrent CP/M-286 (1985)[29]
  • Concurrent DOS 286 preview (1985-01)[30][14]
  • Concurrent DOS 286 1.0 (1985-08-06)[7]
    • Concurrent DOS 286 1.0.01 (1985-08-18/1985-08-21)
    • Concurrent DOS 286 1.0.02 (1985-08-22/1985-09-12)
    • Concurrent DOS 286 1.0.03 (1985-09-10/1985-09-12)
    • Concurrent DOS 286 1.0.04 (1985-09-17)
    • Concurrent DOS 286 1.0.05 (1985-11-01)
    • Concurrent DOS 286 1.0.06 (1985-12-10)
  • Concurrent DOS 286 1.1 (1986-01-07)[7]
  • Concurrent DOS 286 1.2 (1986)[31]
    • Concurrent DOS 286 1.2.00 (1986-04-10/1986-04-24)
    • Concurrent DOS 286 1.2.01 (1986-04-16/1986-05-19)
    • Concurrent DOS 286 1.2.02 (1986-08-18)
  • FlexOS 286 1.3 (November 1986)[9][27]
  • FlexOS 286 1.31 (May 1987)[13]
  • FlexOS 286 1.5 (1988-02-29)
  • FlexOS 286 2.0.00 (1988-03-31)
  • FlexOS 286 2.0 (July 1989)
  • FlexOS 286 2.32 (July 1993)

Intel 80186/NEC V20/V30 platform:

  • FlexOS 186 (1986-09-04 forked)
  • FlexOS 186 1.0 (June 1987)

Intel 80386 platform:

  • FlexOS 386 1.0 (June 1987)
  • FlexOS 386 2.0 (July 1989)
  • FlexOS 386 2.30?
  • FlexOS 386 2.31?
  • FlexOS 386 2.32 (July 1993)
  • FlexOS 386 2.33 (May 1998)
  • FlexOS 386 2.34 (planned for 1999)

NEC V60 platform:

Adaptations edit

IBM 4680 OS edit

Named IBM 4680 OS Version 1, IBM originally chose DR Concurrent DOS 286 as the basis of their IBM 4680 computer for IBM Plant System products and Point-of-Sale terminals in 1986.[32][10][4][33] The last release of the IBM 4680 OS has been Version 4, before it was replaced by IBM 4690 Version 1.[34]

Versions:

  • IBM 4680 Operating System Version 1 Release 1
  • IBM 4680 Operating System Version 1 Release 2
  • IBM 4680 Operating System Version 1 Release 3
  • IBM 4680 Operating System Version 2 Release 1
  • IBM 4680 Operating System Version 3 Release 1
  • IBM 4680 Operating System Version 4 Release 1

IBM and Toshiba 4690 OS edit

Main article: 4690 Operating System

In July 1993, IBM announced the adoption of FlexOS version 2.32 as the basis of their IBM 4690 OS Version 1, to be pre-released on 24 September 1993[33] and generally made available from 25 March 1994.[34][35] FlexOS 2.32 supported 286 and 386 modes, had more efficient memory management, better console and pipe systems, and brought overall quality and performance improvements compared to the version that came with IBM 4680 OS Version 4.[34] Further, it removed limits on the number of applications running concurrently due to its more efficient use of KOSPOOL.[34]

To support Java, IBM 4690 OS Version 2 added support for long filenames by means of a virtual filesystem (VFS) architecture and it introduced FAT32 volumes.

According to "The Year of the Store?", IHL Consulting Group/RIS News, IBM 4690 OS still had a market share of 12% in the POS register/client market in June 2005, when IBM was starting to phase it out in favour to IBM Retail Environment for SUSE (IRES).[33]

IBM continued to maintain 4690 OS up to April 2015, with the most recent version released by IBM in May 2012 being IBM 4690 OS Version 6 Release 3.

Toshiba released Toshiba 4690 OS Version 6 Release 4 in January 2014 and Version 6 Release 5 in January 2016.

Siemens S5-DOS/MT edit

Siemens used and still maintains FlexOS in their factory automation equipment as well. For example, their Simatic S5 STEP-5 operating system S5-DOS/MT is based on FlexOS 386 with X/GEM, FlexNet and Btrieve, whereas the smaller S5-DOS system, also present on these systems, is a variant of Digital Research's Personal CP/M-86.

Siemens industrial systems like COROS LS-B/FlexOS, COROS OS-B/FlexOS, GRACIS/FlexOS, Teleperm M [de] OS-525 were FlexOS and X/GEM-based.

Computers such as the Sicomp [de] PC 16-20 and the PC 32 series were available with FlexOS as well.

CTM edit

The Japanese post office shared terminals CTM [ja] III and CTM IV were based on FlexOS.

See also edit

References edit

  1. ^ a b c d Glass, Brett (1991-05-06). "Answer Line". InfoWorld: 72. ISSN 0199-6649.
  2. ^ Watt, Peggy (1986-10-27). "Digital Research tighens belt with layoffs, reorganization - Realign business units, product lines". Computerworld - The Newsweekly for the Computer Community. Computer Industry. Vol. XX, no. 43. Monterey, California, USA: CW Communications, Inc. p. 95. ISSN 0010-4841. from the original on 2020-02-16. Retrieved 2020-02-16.
  3. ^ a b c "Novell and Digital Research sign definitive merger agreement". Business Wire. 1991-07-17. from the original on 2018-08-18. Retrieved 2017-01-24.
  4. ^ a b c CBR, ed. (1987-01-15). "Digital Research launches FlexOS 286 Real-Time Manufacturing Operating System". Computer Business Review. Archived from the original on 2013-01-18. Retrieved 2018-09-15.
  5. ^ Wein, Josef "Joe" (2002). "Gary Kildall in England". from the original on 2019-04-03. Retrieved 2019-04-03.
  6. ^ Holsworth, Francis "Frank" R. (2006-02-01). "Video: Frank Holsworth, developer" (interview). Information Technology Corporate Histories Collection. Computer History Museum. CHM Catalog Number 102770341. ITCHP 44403c1a3fd53. Lot Number X7847.2017. from the original on 2019-04-03. Retrieved 2019-04-04.
  7. ^ a b c d e f g h i j "Concurrent DOS 68K 1.2 - Developer Kit for Motorola VME/10 - Disk 2". 1986-08-06 [1986-04-08]. Retrieved 2018-09-13. (NB. Also contains header files from Concurrent DOS 286, and some hints on the existence of a Concurrent DOS V60. STRUCT.H mentions LOADALL for "8086 emulation".)
  8. ^ a b c CBR, ed. (1987-06-03). "Digital Research shows off Real-Time FlexOS 386". Computer Business Review. Archived from the original on 2013-06-28. Retrieved 2011-09-06.
  9. ^ a b c d e FlexOS Supplement for Intel iAPX 286-based Computers (PDF). 1.3 (1 ed.). Digital Research, Inc. November 1986. (PDF) from the original on 2021-09-03. Retrieved 2018-08-14.
  10. ^ a b c "IBM selects Concurrent DOS-286 for PC AT retail system" (PDF). European Review. Digital Research (18): 1. March 1986. Retrieved 2018-09-15.
  11. ^ a b c "Concurrent DOS 68K 1.2 - Developer Kit for Motorola VME/10 - Disk 1". 1986-08-06 [1986-04-08]. Retrieved 2018-09-13.
  12. ^ a b c "Concurrent DOS 68K 1.2 - Developer Kit for Motorola VME/10 - Disk 3". 1986-08-06 [1986-04-08]. Retrieved 2018-09-13.
  13. ^ a b FlexOS 286 Version 1.31 - Release Note 01 (PDF). 1.31 (1 ed.). Digital Research, Inc. May 1987. 1073-1001-002. Retrieved 2018-09-14.
  14. ^ a b Foster, Edward (1985-05-13). "Super DOS awaits new 80286 – Concurrent DOS 286 – delayed until Intel upgrades chip – offers Xenix's power and IBM PC compatibility". InfoWorld. InfoWorld Media Group. 7 (19): 17–18. ISSN 0199-6649.
  15. ^ Foster, Edward (1985-08-26). "Intel shows new 80286 chip – Future of DRI's Concurrent DOS 286 still unclear after processor fixed". InfoWorld. InfoWorld Media Group. 7 (34): 21. ISSN 0199-6649.
  16. ^ CBR, ed. (1988-04-05). "Digital Research, profitable for fiscal 1987, comes out of the closet". Computer Business Review.
  17. ^ Digital Research (1990-06-04). "Sold on FlexOS". Computerworld (Advertisement). XXIV (23). Retrieved 2017-01-24.
  18. ^ a b Schulman, Andrew; Brown, Ralf D.; Maxey, David; Michels, Raymond J.; Kyle, Jim (1994) [November 1993]. Undocumented DOS: A programmer's guide to reserved MS-DOS functions and data structures - expanded to include MS-DOS 6, Novell DOS and Windows 3.1 (2 ed.). Addison Wesley. p. 182. ISBN 0-201-63287-X. (xviii+856+vi pages, 3.5-inch floppy) Errata:
  19. ^ Scott, Karyl (1991-07-29). "Novell/DRI merger to reap better client management". InfoWorld. Networking. Vol. 13, no. 30. InfoWorld Publishing Co. p. 33. ISSN 0199-6649. from the original on 2020-02-09. Retrieved 2017-01-21.
  20. ^ Allchin, Jim (1992-05-27) [1991-07-17]. "Novell/Digital Research reach definitive agreement…" (PDF) (Court document). Plaintiff's exhibit 828, Comes v. Microsoft. (PDF) from the original on 2016-11-19. Retrieved 2017-01-21.
  21. ^ "Novell Announces RTOS Vendor Program Which Brings Integrated Networking Solutions to the Embedded Systems Marketplace" (Press Release). Novell. 1995-05-23. Because Novell used Integrated Systems' FlexOS during the development and testing of NEST, we are in the unique position of supporting it through both our real-time product lines pSOSystem for deeply embedded markets, and FlexOS for point of sale," said Moses Joseph, vice president of marketing for Integrated Systems. "Developers using the FlexOS development kit and the expanded pSOSystem/NEST package for everything from home security and entertainment to office automation and global communications applications, now have quick and easy access to the widest variety of standard networking protocols.
  22. ^ a b (White paper). Integrated Systems, Inc. (ISI). 1998. Archived from the original on 1998-02-19.
  23. ^ FlexOS User's Guide Version 1.3 (PDF). 1.3 (1 ed.). Digital Research. November 1986. 1073-2003-001. (PDF) from the original on 2019-03-30. Retrieved 2019-04-23.
  24. ^ a b "MCF5251 Product Brief - ColdFire 32-Bit Processor" (PDF) (Product flyer) (Revision 0 ed.). Freescale Semiconductor, Inc. June 2006. MCF5251PB. Archived (PDF) from the original on 2018-09-15. Retrieved 2018-09-15.
  25. ^ Gallant, John (1984-01-23). "Digital Research, Monterey ink Unix-centered pact". Computerworld. XVIII (3): 6. Retrieved 2019-02-03.
  26. ^ Knox, James M. (1986-06-22). "Re: DRI Concurrent DOS for 68K". Newsgroup: mod.computers.68k. Archived from the original on 2018-09-13. Retrieved 2018-09-13.
  27. ^ a b Heller, Robert; Taetsch, Tom (1987-01-29) [1987-01-26, 1987-01-27]. "Concurrent DOS 68K: The word from DRI". Newsgroup: mod.computers.68k. from the original on 2020-01-03. Retrieved 2010-01-03. […] it is possible to purchase an implementation of CDOS-68K for the Motorola VME-10. The media it comes on is Motorola VME-10 5.25" floppies. […] CDOS-68K is the 68K version of CDOS-286 (which has now been updated and renamed to FlexOS 286). This CDOS-286/68K operating system was designed specifically to provide easy addition and deletion of I/O drivers and sub-drivers. Drivers can either be linked in to the O/S or kept external and dynamically loaded at boot time. […] CDOS-68K is at revision level 1.2, while CDOS-286 was upgraded to rev level 1.3 (at which point it became FlexOS 286). The significance of this to you is that no enhancements or maintenance of the 68K version is planned in the near future (unless a "major" OEM contract should happen). So the 68K O/S is pretty much being sold only on an "as is" basis. […]
  28. ^ Swaine, Michael (1982-04-05). "Homebrew Computer Club views Intel's superchip". InfoWorld. Palo Alto, CA, USA. 4 (13): 4. from the original on 2020-01-07. Retrieved 2020-01-07. […] Digital Research is producing an operating system for the 286. MP/M-286 will take advantage of the processor's memory management and protection and virtual memory support. Digital Research is promising "complete" compatibility with its MP/M-86 and CP/M-86 for the 8086 processor. Intel is supplying Digital Research with the hardware to develop and test MP/M-286. […]
  29. ^ Bidmead, Christopher H. (2006-05-09) [1985-03-25]. "Surviving Big Blue". Doctor Who. Which Computer?. from the original on 2020-01-07. Retrieved 2020-01-07. […] Paul Bailey of Digital Research keenly promotes this approach; it is his company that is supplying ICL and others with Concurrent Dos-286. This chameleon operating system allows ICL and other 80286 manufacturers to build machines that will be able to cope with all the existing body of IBM-PC software -- and at the same time promise multi-tasking, windowing and true concurrency, three features that together allow a single micro to do several things at once. […] Although no firm announcements have been made, it seems certain that by the end of the year ACT will be offering a Concurrent CP/M 286 machine to fuel its drive into the corporate market. But by this time it will have to contend with IBM's own 80286 office micro, the PC/AT. […] IBM also have a software product in the offing that could pull the rug out from under the Concurrent contenders. Some 180K in size, TopView is a program for IBM PC's and AT's that beefs up the operating system to provide windowing facilities for existing 'well behaved' standard packages. […]
  30. ^ "Concurrent DOS-286 Challenges Unix". BYTE Magazine. 10 (5): 375-377. May 1985. Archived from the original on 2018-09-14. Retrieved 2017-01-23. [3]
  31. ^ High C Programmer's Guide - Version 1.2 for Concurrent DOS (PDF) (1 ed.). Santa Cruz, CA, USA: MetaWare Incorporated. 1986 [1985-09-15]. Retrieved 2018-08-14. This is a guide to the operation of the High C compiler as implemented for the Concurrent DOS 286 1.2 or later operating system - hereafter abbreviated to just "Concurrent" per Digital Research custom - running on the Intel 80286 microprocessor and using the Intel Object-Module Format (OMF). The compiler generates code for any of the Intel 8086/88/186/188/286 family of microprocessors.
  32. ^ Calvo, Melissa; Forbes, Jim (1986-02-10). "IBM to use a DRI operating system". InfoWorld . Retrieved 2011-09-06.
  33. ^ a b c "How to choose the best OS for your point-of-sale" (PDF). Novell. 2005 – via 360Commerce. (NB. This PDF has a short history of POS operating systems, also mentioning IBM 4680 and IBM 4690.)
  34. ^ a b c d IBM, ed. (June 1993). "IBM 4690 OPERATING SYSTEM VERSION 1 - Announcement Letter Number 293-281 dated 1 June 1993 - Brief description of announcement, charges, and availability". Retrieved 2011-09-06.
  35. ^ IBM (ed.). . Archived from the original on 2011-09-30. Retrieved 2011-09-06.

Further reading edit

  • FlexOS Programmer's Guide Version 1.3 (PDF). 1.3 (1 ed.). Digital Research, Inc. November 1986. 1073-2023-001. (PDF) from the original on 2019-03-24. Retrieved 2018-09-14.
  • FlexOS 286 Programmer's Utilities Guide (PDF). Digital Research, Inc. 1986. 1073-2043-001. (PDF) from the original on 2019-03-24. Retrieved 2018-09-14.
  • FlexNet Network Operating System User's Guide (PDF). 1.3 (1 ed.). Digital Research, Inc. November 1986. 1082-2003-001. (PDF) from the original on 2019-03-24. Retrieved 2018-09-14.
  • Concurrent DOS 286, FlexOS, IBM 4690
  • TELEPERM M - Bedien- und Beobachtungssystem OS 525 -Handbuch (PDF) (in German), Gerätewerk Karlsruhe, Germany: Siemens Aktiengesellschaft, 1997, C79000-G8000-C522-04, (PDF) from the original on 2018-09-15, retrieved 2019-04-23

December 16, 2023
flexos, confused, with, flex, operating, system, discontinued, modular, real, time, multiuser, multitasking, operating, system, rtos, designed, computer, integrated, manufacturing, laboratory, retail, financial, markets, developed, digital, research, flexible,. Not to be confused with FLEX operating system FlexOS is a discontinued modular real time multiuser multitasking operating system RTOS designed for computer integrated manufacturing laboratory retail and financial markets Developed by Digital Research s Flexible Automation Business Unit in Monterey California in 1985 2 3 the system was considered to become a successor of Digital Research s earlier Concurrent DOS but with a new modular and considerably different system architecture and portability across several processor families 4 Still named Concurrent DOS 68K and Concurrent DOS 286 it was renamed into FlexOS on 1 October 1986 to better differentiate the target audiences FlexOS was licensed by several OEMs who selected it as the basis for their own operating systems like 4680 OS 4690 OS S5 DOS MT and others Unrelated to FlexOS the original Concurrent DOS system architecture found a continuation in successors like Concurrent DOS XM and Concurrent DOS 386 as well FlexOSDeveloperDigital ResearchWritten inCWorking stateDiscontinuedSource modelClosed sourceInitial release1986 37 years ago 1986 Latest release2 33 May 1998 25 years ago 1998 05 Latest preview2 34 1999 24 years ago 1999 Marketing targetIndustrial PoSAvailable inEnglishPlatformsIntel 80186 Intel 80286 Intel 80386 Motorola 68000 V60 V70Kernel typemodularDefaultuser interfacevarious frontends X GEMLicenseProprietaryPreceded byConcurrent DOS 286 Concurrent DOS 68K Concurrent DOS V60 1 Succeeded byS5 DOS MT 4680 OS 4690 OS Contents 1 Overview 2 Commands 3 Versions 4 Adaptations 4 1 IBM 4680 OS 4 2 IBM and Toshiba 4690 OS 4 3 Siemens S5 DOS MT 4 4 CTM 5 See also 6 References 7 Further readingOverview editConcurrent DOS 286 Concurrent DOS 68K and FlexOS were designed by Francis Frank R Holsworth using siglum FRH 5 6 Like Portable CP M Concurrent DOS 286 Concurrent DOS 68K and Concurrent DOS V60 1 7 FlexOS was written in C for higher portability across hardware platforms and it featured very low interrupt latency and fast context switching 8 The original protected mode FlexOS 286 version 1 3 9 was designed for host machines equipped with 286 CPUs and with adaptations for NEC V60 NEC V70 and Motorola 68000 processors planned 4 1 7 FlexOS 286 executables using the system s native INT DCh INT 220 application program interface had the filename extension 286 A CP M API front end FE was available as well 10 using the extension CMD for executables A filename extension of 68K was reserved for FlexOS 68K a file extension derived from Concurrent DOS 68K as of 1986 11 7 12 10 In May 1987 FlexOS version 1 31 was released for 80286 machines 13 The developer version required an IBM PC AT compatible machine with 640 KB of conventional and 512 KB of extended memory and either a monochrome CGA or an EGA graphics adapter FlexOS supported a concept of dynamically loadable and unloadable subdrivers and it came with driver prototypes for floppies hard disks printers serial interfaces RAM disks mice and console drivers During boot the FLEX286 SYS kernel would load the resource managers and device drivers specified in the CONFIG SYS binary file not to be mixed up with the similarly named CONFIG SYS configuration file under DOS and its shell COMMAND 286 would execute a CONFIG BAT startup batch job instead of the common AUTOEXEC BAT FlexOS s optional DOS emulator provided limited PC DOS 2 1 compatibility for DOS COM and EXE programs 9 Certain restrictions applied in 8086 emulation mode since these programs were executed in the processor s protected mode Due to bugs in earlier steppings of the Intel 80286 the FlexOS 286 DOS front end required at least the 80286 E2 stepping to function properly see LOADALL 9 These problems had already caused delays in the delivery of Concurrent DOS 286 earlier 14 15 The system optionally supported a multitasking GEM VDI for graphical applications 9 16 FlexOS 1 31 could be linked with none either or both of these two modules FlexOS 1 31 also supported FlexNet By June 1987 there were also versions 1 0 of FlexOS 386 for hosts and FlexOS 186 for remote cell controllers 8 FlexOS 386 provided a windowing feature and offered PC DOS 3 2 and GEM compatibility 8 FlexOS 286 and FlexOS 386 versions 2 0 were registered on 3 July 1989 Among the major FlexOS customers in 1990 1991 were FANUC IBM ICL Nixdorf Siemens TEC Thorn EMI Software and Micrologic 3 17 Novell bought Digital Research for US 80 million 18 in July 1991 19 3 20 18 X GEM for FlexOS release 1 0 a k a X GEM FlexOS 286 and 386 and FlexNet were registered on 21 December 1992 FlexOS was used as the primary test platform for the new Novell Embedded Systems Technology NEST 21 When Novell decided to abandon further development of the various Digital Research operating systems such as Multiuser DOS a successor to Concurrent DOS and Novell DOS a successor to DR DOS they sold FlexOS off to the Santa Clara California based Integrated Systems Inc ISI for US 3 million in July 1994 22 The deal comprised a direct payment of half this sum as well as shares representing 2 of the company The company already had pSOS another modular real time multitasking operating system for embedded systems but they continued to maintain FlexOS as well 22 FlexOS version 2 33 was current as of May 1998 and with FlexOS 2 34 to be released soon after with added support for faster CPUs 64 MB of memory EIDE and ATAPI CDROM drives Integrated Systems was bought by their competitor Wind River Systems in February 2000 Commands editThe following list of commands is supported by FlexOS 23 ASSIGN BACK BACKUP BREAK CANCEL CHDIR CHKDSK COMMAND COMP CONFIG COPY CTTY DATE DEFINE DIR DISKCOMP DISKCOPY DISKSET ERASE EXIT FDISK FIND FORMAT FSET LIST LOGOFF LOGON MKDIR MORE ORDER PASSWORD PATH PRINT PROCESS PROMPT RECDIR RECFILE RENAME RESTORE RMDIR SECURITY SORT SYS TIME TREE TYPE VER VOLVersions editKnown FlexOS versions include Motorola 68000 Freescale NXP ColdFire MCF5251 24 platform Concurrent DOS 68K 1 0 1985 25 26 Concurrent DOS 68K 1 1 7 Concurrent DOS 68K 1 20 April 1986 11 7 12 1986 05 27 7 Concurrent DOS 68K 1 21 1986 11 7 12 27 FlexOS 68K 24 1 x Intel 80286 platform MP M 286 1982 28 Concurrent CP M 286 1985 29 Concurrent DOS 286 preview 1985 01 30 14 Concurrent DOS 286 1 0 1985 08 06 7 Concurrent DOS 286 1 0 01 1985 08 18 1985 08 21 Concurrent DOS 286 1 0 02 1985 08 22 1985 09 12 Concurrent DOS 286 1 0 03 1985 09 10 1985 09 12 Concurrent DOS 286 1 0 04 1985 09 17 Concurrent DOS 286 1 0 05 1985 11 01 Concurrent DOS 286 1 0 06 1985 12 10 Concurrent DOS 286 1 1 1986 01 07 7 Concurrent DOS 286 1 2 1986 31 Concurrent DOS 286 1 2 00 1986 04 10 1986 04 24 Concurrent DOS 286 1 2 01 1986 04 16 1986 05 19 Concurrent DOS 286 1 2 02 1986 08 18 FlexOS 286 1 3 November 1986 9 27 FlexOS 286 1 31 May 1987 13 FlexOS 286 1 5 1988 02 29 FlexOS 286 2 0 00 1988 03 31 FlexOS 286 2 0 July 1989 FlexOS 286 2 32 July 1993 Intel 80186 NEC V20 V30 platform FlexOS 186 1986 09 04 forked FlexOS 186 1 0 June 1987 Intel 80386 platform FlexOS 386 1 0 June 1987 FlexOS 386 2 0 July 1989 FlexOS 386 2 30 FlexOS 386 2 31 FlexOS 386 2 32 July 1993 FlexOS 386 2 33 May 1998 FlexOS 386 2 34 planned for 1999 NEC V60 platform Concurrent DOS V60 1 7 Adaptations editIBM 4680 OS edit Named IBM 4680 OS Version 1 IBM originally chose DR Concurrent DOS 286 as the basis of their IBM 4680 computer for IBM Plant System products and Point of Sale terminals in 1986 32 10 4 33 The last release of the IBM 4680 OS has been Version 4 before it was replaced by IBM 4690 Version 1 34 Versions IBM 4680 Operating System Version 1 Release 1 IBM 4680 Operating System Version 1 Release 2 IBM 4680 Operating System Version 1 Release 3 IBM 4680 Operating System Version 2 Release 1 IBM 4680 Operating System Version 3 Release 1 IBM 4680 Operating System Version 4 Release 1IBM and Toshiba 4690 OS edit Main article 4690 Operating System In July 1993 IBM announced the adoption of FlexOS version 2 32 as the basis of their IBM 4690 OS Version 1 to be pre released on 24 September 1993 33 and generally made available from 25 March 1994 34 35 FlexOS 2 32 supported 286 and 386 modes had more efficient memory management better console and pipe systems and brought overall quality and performance improvements compared to the version that came with IBM 4680 OS Version 4 34 Further it removed limits on the number of applications running concurrently due to its more efficient use of KOSPOOL 34 To support Java IBM 4690 OS Version 2 added support for long filenames by means of a virtual filesystem VFS architecture and it introduced FAT32 volumes According to The Year of the Store IHL Consulting Group RIS News IBM 4690 OS still had a market share of 12 in the POS register client market in June 2005 when IBM was starting to phase it out in favour to IBM Retail Environment for SUSE IRES 33 IBM continued to maintain 4690 OS up to April 2015 with the most recent version released by IBM in May 2012 being IBM 4690 OS Version 6 Release 3 Toshiba released Toshiba 4690 OS Version 6 Release 4 in January 2014 and Version 6 Release 5 in January 2016 Siemens S5 DOS MT edit Siemens used and still maintains FlexOS in their factory automation equipment as well For example their Simatic S5 STEP 5 operating system S5 DOS MT is based on FlexOS 386 with X GEM FlexNet and Btrieve whereas the smaller S5 DOS system also present on these systems is a variant of Digital Research s Personal CP M 86 Siemens industrial systems like COROS LS B FlexOS COROS OS B FlexOS GRACIS FlexOS Teleperm M de OS 525 were FlexOS and X GEM based Computers such as the Sicomp de PC 16 20 and the PC 32 series were available with FlexOS as well CTM edit The Japanese post office shared terminals CTM ja III and CTM IV were based on FlexOS See also editConcurrent DOS 286 GEM IBM 4683 IBM 4690 OS IBM 4694 pSOS Distributed Data Management Architecture DDM Electronic point of sale EPOS References edit a b c d Glass Brett 1991 05 06 Answer Line InfoWorld 72 ISSN 0199 6649 Watt Peggy 1986 10 27 Digital Research tighens belt with layoffs reorganization Realign business units product lines Computerworld The Newsweekly for the Computer Community Computer Industry Vol XX no 43 Monterey California USA CW Communications Inc p 95 ISSN 0010 4841 Archived from the original on 2020 02 16 Retrieved 2020 02 16 a b c Novell and Digital Research sign definitive merger agreement Business Wire 1991 07 17 Archived from the original on 2018 08 18 Retrieved 2017 01 24 a b c CBR ed 1987 01 15 Digital Research launches FlexOS 286 Real Time Manufacturing Operating System Computer Business Review Archived from the original on 2013 01 18 Retrieved 2018 09 15 Wein Josef Joe 2002 Gary Kildall in England Archived from the original on 2019 04 03 Retrieved 2019 04 03 Holsworth Francis Frank R 2006 02 01 Video Frank Holsworth developer interview Information Technology Corporate Histories Collection Computer History Museum CHM Catalog Number 102770341 ITCHP 44403c1a3fd53 Lot Number X7847 2017 Archived from the original on 2019 04 03 Retrieved 2019 04 04 a b c d e f g h i j Concurrent DOS 68K 1 2 Developer Kit for Motorola VME 10 Disk 2 1986 08 06 1986 04 08 Retrieved 2018 09 13 NB Also contains header files from Concurrent DOS 286 and some hints on the existence of a Concurrent DOS V60 STRUCT H mentions LOADALL for 8086 emulation a b c CBR ed 1987 06 03 Digital Research shows off Real Time FlexOS 386 Computer Business Review Archived from the original on 2013 06 28 Retrieved 2011 09 06 a b c d e FlexOS Supplement for Intel iAPX 286 based Computers PDF 1 3 1 ed Digital Research Inc November 1986 Archived PDF from the original on 2021 09 03 Retrieved 2018 08 14 a b c IBM selects Concurrent DOS 286 for PC AT retail system PDF European Review Digital Research 18 1 March 1986 Retrieved 2018 09 15 a b c Concurrent DOS 68K 1 2 Developer Kit for Motorola VME 10 Disk 1 1986 08 06 1986 04 08 Retrieved 2018 09 13 a b c Concurrent DOS 68K 1 2 Developer Kit for Motorola VME 10 Disk 3 1986 08 06 1986 04 08 Retrieved 2018 09 13 a b FlexOS 286 Version 1 31 Release Note 01 PDF 1 31 1 ed Digital Research Inc May 1987 1073 1001 002 Retrieved 2018 09 14 a b Foster Edward 1985 05 13 Super DOS awaits new 80286 Concurrent DOS 286 delayed until Intel upgrades chip offers Xenix s power and IBM PC compatibility InfoWorld InfoWorld Media Group 7 19 17 18 ISSN 0199 6649 Foster Edward 1985 08 26 Intel shows new 80286 chip Future of DRI s Concurrent DOS 286 still unclear after processor fixed InfoWorld InfoWorld Media Group 7 34 21 ISSN 0199 6649 CBR ed 1988 04 05 Digital Research profitable for fiscal 1987 comes out of the closet Computer Business Review Digital Research 1990 06 04 Sold on FlexOS Computerworld Advertisement XXIV 23 Retrieved 2017 01 24 a b Schulman Andrew Brown Ralf D Maxey David Michels Raymond J Kyle Jim 1994 November 1993 Undocumented DOS A programmer s guide to reserved MS DOS functions and data structures expanded to include MS DOS 6 Novell DOS and Windows 3 1 2 ed Addison Wesley p 182 ISBN 0 201 63287 X xviii 856 vi pages 3 5 inch floppy Errata 1 2 Scott Karyl 1991 07 29 Novell DRI merger to reap better client management InfoWorld Networking Vol 13 no 30 InfoWorld Publishing Co p 33 ISSN 0199 6649 Archived from the original on 2020 02 09 Retrieved 2017 01 21 Allchin Jim 1992 05 27 1991 07 17 Novell Digital Research reach definitive agreement PDF Court document Plaintiff s exhibit 828 Comes v Microsoft Archived PDF from the original on 2016 11 19 Retrieved 2017 01 21 Novell Announces RTOS Vendor Program Which Brings Integrated Networking Solutions to the Embedded Systems Marketplace Press Release Novell 1995 05 23 Because Novell used Integrated Systems FlexOS during the development and testing of NEST we are in the unique position of supporting it through both our real time product lines pSOSystem for deeply embedded markets and FlexOS for point of sale said Moses Joseph vice president of marketing for Integrated Systems Developers using the FlexOS development kit and the expanded pSOSystem NEST package for everything from home security and entertainment to office automation and global communications applications now have quick and easy access to the widest variety of standard networking protocols a b pSOSystem and the NEST Development Environment Designing Embedded Applications with NetWare Connectivity White paper Integrated Systems Inc ISI 1998 Archived from the original on 1998 02 19 FlexOS User s Guide Version 1 3 PDF 1 3 1 ed Digital Research November 1986 1073 2003 001 Archived PDF from the original on 2019 03 30 Retrieved 2019 04 23 a b MCF5251 Product Brief ColdFire 32 Bit Processor PDF Product flyer Revision 0 ed Freescale Semiconductor Inc June 2006 MCF5251PB Archived PDF from the original on 2018 09 15 Retrieved 2018 09 15 Gallant John 1984 01 23 Digital Research Monterey ink Unix centered pact Computerworld XVIII 3 6 Retrieved 2019 02 03 Knox James M 1986 06 22 Re DRI Concurrent DOS for 68K Newsgroup mod computers 68k Archived from the original on 2018 09 13 Retrieved 2018 09 13 a b Heller Robert Taetsch Tom 1987 01 29 1987 01 26 1987 01 27 Concurrent DOS 68K The word from DRI Newsgroup mod computers 68k Archived from the original on 2020 01 03 Retrieved 2010 01 03 it is possible to purchase an implementation of CDOS 68K for the Motorola VME 10 The media it comes on is Motorola VME 10 5 25 floppies CDOS 68K is the 68K version of CDOS 286 which has now been updated and renamed to FlexOS 286 This CDOS 286 68K operating system was designed specifically to provide easy addition and deletion of I O drivers and sub drivers Drivers can either be linked in to the O S or kept external and dynamically loaded at boot time CDOS 68K is at revision level 1 2 while CDOS 286 was upgraded to rev level 1 3 at which point it became FlexOS 286 The significance of this to you is that no enhancements or maintenance of the 68K version is planned in the near future unless a major OEM contract should happen So the 68K O S is pretty much being sold only on an as is basis Swaine Michael 1982 04 05 Homebrew Computer Club views Intel s superchip InfoWorld Palo Alto CA USA 4 13 4 Archived from the original on 2020 01 07 Retrieved 2020 01 07 Digital Research is producing an operating system for the 286 MP M 286 will take advantage of the processor s memory management and protection and virtual memory support Digital Research is promising complete compatibility with its MP M 86 and CP M 86 for the 8086 processor Intel is supplying Digital Research with the hardware to develop and test MP M 286 Bidmead Christopher H 2006 05 09 1985 03 25 Surviving Big Blue Doctor Who Which Computer Archived from the original on 2020 01 07 Retrieved 2020 01 07 Paul Bailey of Digital Research keenly promotes this approach it is his company that is supplying ICL and others with Concurrent Dos 286 This chameleon operating system allows ICL and other 80286 manufacturers to build machines that will be able to cope with all the existing body of IBM PC software and at the same time promise multi tasking windowing and true concurrency three features that together allow a single micro to do several things at once Although no firm announcements have been made it seems certain that by the end of the year ACT will be offering a Concurrent CP M 286 machine to fuel its drive into the corporate market But by this time it will have to contend with IBM s own 80286 office micro the PC AT IBM also have a software product in the offing that could pull the rug out from under the Concurrent contenders Some 180K in size TopView is a program for IBM PC s and AT s that beefs up the operating system to provide windowing facilities for existing well behaved standard packages Concurrent DOS 286 Challenges Unix BYTE Magazine 10 5 375 377 May 1985 Archived from the original on 2018 09 14 Retrieved 2017 01 23 3 High C Programmer s Guide Version 1 2 for Concurrent DOS PDF 1 ed Santa Cruz CA USA MetaWare Incorporated 1986 1985 09 15 Retrieved 2018 08 14 This is a guide to the operation of the High C compiler as implemented for the Concurrent DOS 286 1 2 or later operating system hereafter abbreviated to just Concurrent per Digital Research custom running on the Intel 80286 microprocessor and using the Intel Object Module Format OMF The compiler generates code for any of the Intel 8086 88 186 188 286 family of microprocessors Calvo Melissa Forbes Jim 1986 02 10 IBM to use a DRI operating system InfoWorld Retrieved 2011 09 06 a b c How to choose the best OS for your point of sale PDF Novell 2005 via 360Commerce NB This PDF has a short history of POS operating systems also mentioning IBM 4680 and IBM 4690 a b c d IBM ed June 1993 IBM 4690 OPERATING SYSTEM VERSION 1 Announcement Letter Number 293 281 dated 1 June 1993 Brief description of announcement charges and availability Retrieved 2011 09 06 IBM ed IBM 4690 Operating System Archived from the original on 2011 09 30 Retrieved 2011 09 06 Further reading editFlexOS Programmer s Guide Version 1 3 PDF 1 3 1 ed Digital Research Inc November 1986 1073 2023 001 Archived PDF from the original on 2019 03 24 Retrieved 2018 09 14 FlexOS 286 Programmer s Utilities Guide PDF Digital Research Inc 1986 1073 2043 001 Archived PDF from the original on 2019 03 24 Retrieved 2018 09 14 FlexNet Network Operating System User s Guide PDF 1 3 1 ed Digital Research Inc November 1986 1082 2003 001 Archived PDF from the original on 2019 03 24 Retrieved 2018 09 14 Concurrent DOS 286 FlexOS IBM 4690 TELEPERM M Bedien und Beobachtungssystem OS 525 Handbuch PDF in German Geratewerk Karlsruhe Germany Siemens Aktiengesellschaft 1997 C79000 G8000 C522 04 archived PDF from the original on 2018 09 15 retrieved 2019 04 23 Retrieved from https en wikipedia org w index php title FlexOS amp oldid 1147265610 4680 OS, wikipedia, wiki, book, books, library,

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