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词条 86-DOS
释义

  1. History

     Origins  IBM interest  Creation of PC DOS  Intellectual property dispute  {{anchor|0.10|0.11|0.20|0.30|0.33|0.34}}{{anchor|0.42|0.56|0.60|0.74|0.75|0.76|0.80|1.00|1.01|1.10}}Versions 

  2. Features

     Commands  Internal commands  External commands  EDLIN  Supported disk formats{{anchor|Formats}} 

  3. See also

  4. Notes

  5. References

  6. External links

{{Infobox OS
|name=86-DOS
|logo=86-DOS logo.svg
|screenshot=86-DOS running assembler and HEX2BIN (screenshot).png
|caption=A sample 86-DOS session (simulated).
|developer=Seattle Computer Products / Tim Paterson
|source_model=Closed source
|kernel_type=Monolithic kernel
|supported_platforms=x86
|ui=Command line interface
|family=DOS
|released={{Start date and age|1980}}
|latest_release_version=86-DOS 1.10
|latest_release_date={{Start date and age|1981|07}}
|marketing_target=S-100-based micro-computers with 8086 processor
|programmed_in=8086-Assembly language
|prog_language=8086-Assembly language
|language=English
|updatemodel=
|package_manager=N/A
|working_state=Historic, Unsupported
|license=Proprietary
|website=
}}

86-DOS is a discontinued operating system developed and marketed by Seattle Computer Products (SCP) for its Intel 8086-based computer kit. Initially known as QDOS (Quick and Dirty Operating System), the name was changed to 86-DOS once SCP started licensing the operating system in 1980.

86-DOS had a command structure and application programming interface that imitated that of Digital Research's CP/M operating system, which made it easy to port programs from the latter. The system was licensed and then purchased by Microsoft and developed further as MS-DOS and PC DOS.[1]

History

Origins

86-DOS was created because sales of the Seattle Computer Products 8086 computer kit, demonstrated in June 1979 and shipped in November,[2] were languishing due to the absence of an operating system. The only software which SCP could sell with the board was Microsoft's Standalone Disk BASIC-86, which Microsoft had developed on a prototype of SCP's hardware.[2] SCP wanted to offer the 8086-version of CP/M that Digital Research had announced, but its release date was uncertain.{{r|paterson198306}} This was not the first time Digital Research had lagged behind hardware developments; two years earlier it had been slow to adapt CP/M for new floppy disk formats and hard disks. In April 1980 SCP assigned 24-year-old Tim Paterson to develop a substitute for CP/M-86.[2]

Using a CP/M-80 manual as reference[5] Paterson modeled 86-DOS after its architecture and interfaces, but adapted to meet the requirements of Intel's 8086 16-bit processor, for easy (and partially automated) source-level translatability of the many existing 8-bit CP/M programs;[6] porting them to either DOS or CP/M-86 was about equally difficult,[7] and eased by the fact that Intel had already published a method that could be used to automatically translate software from the Intel 8080 processor that CP/M was designed for to the new 8086 instruction set.{{r|paterson198306}} At the same time he made a number of changes and enhancements to address what he saw as CP/M's shortcomings. CP/M cached file system information in memory for speed, but this required a user to force an update to a disk before removing it; if the user forgot, the disk would become corrupt. Paterson took the safer but slower approach of updating the disk with each operation. CP/M's PIP command, which copied files, supported several special file names that referred to hardware devices such as printers and communication ports. Paterson built these names into the operating system as device files so that any program could use them. He gave his copying program the more intuitive name COPY. Rather than implementing CP/M's file system, he drew on Microsoft Standalone Disk BASIC-86's FAT filesystem.[1]

By mid-1980 SCP advertised 86-DOS, priced at $95 for owners of its $1290 8086 board and $195 for others. It touted the software's ability to read Z80 source code from a CP/M disk and translate it to 8086 source code, and promised that only "minor hand correction and optimization" was needed to produce 8086 binaries.{{r|BYTE_1980_86-DOS}}

IBM interest

In October 1980, IBM was developing what would become the original IBM Personal Computer. CP/M was by far the most popular operating system in use at the time, and IBM felt it needed CP/M in order to compete. IBM's representatives visited Digital Research and discussed licensing with Digital Research's licensing representative, Dorothy Kildall (née McEwen), who hesitated to sign IBM's non-disclosure agreement. Although the NDA was later accepted, Digital Research would not accept IBM's proposal of $250,000 in exchange for as many copies as IBM could sell, insisting on the usual royalty-based plan.[9] In later discussions between IBM and Bill Gates, Gates mentioned the existence of 86-DOS and IBM representative Jack Sams told him to get a license for it.{{citation needed|date=July 2011}}

Creation of PC DOS

Microsoft purchased a non-exclusive license for 86-DOS from Seattle Computer Products[10] in December 1980 for $25,000.{{citation needed|date=April 2013}} In May 1981, it hired Tim Paterson to port the system to the IBM PC,[2] which used the slower and less expensive Intel 8088 processor and had its own specific family of peripherals. IBM watched the developments daily,[2] submitting over 300 change requests before it accepted the product and wrote the user manual for it.

In July 1981, a month before the PC's release, Microsoft purchased all rights to 86-DOS from SCP for $50,000.[2][14][15] It met IBM's main criteria: it looked like CP/M,[1] and it was easy to adapt existing 8-bit CP/M programs to run under it, notably thanks to the TRANS command which would translate source files from 8080 to 8086 machine instructions. Microsoft licensed 86-DOS to IBM, and it became PC DOS 1.0. This license also permitted Microsoft to sell DOS to other companies, which it did. The deal was spectacularly successful, and SCP later claimed in court that Microsoft had concealed its relationship with IBM in order to purchase the operating system cheaply. SCP ultimately received a 1 million dollar settlement payment.

Intellectual property dispute

When Digital Research founder Gary Kildall examined PC DOS and found that it duplicated CP/M's programming interface, he wanted to sue IBM, which at the time claimed that PC DOS was its own product. However, Digital Research's attorney did not believe that the relevant law was clear enough to sue. Nonetheless, Kildall confronted IBM and persuaded them to offer CP/M-86 with the PC in exchange for a release of liability.

Controversy has continued to surround the similarity between the two systems. Perhaps the most sensational claim comes from Jerry Pournelle, who claims that Kildall personally demonstrated to him that DOS contained CP/M code by entering a command in DOS that displayed Kildall's name;[17] {{as of|2006|lc=y}} Pournelle has not revealed the command and nobody has come forward to corroborate his story. A 2004 book about Kildall says that he used such an encrypted message to demonstrate that other manufacturers had copied CP/M, but does not say that he found the message in DOS;[19] instead Kildall's memoir (a source for the book) pointed to the well-known interface similarity. Paterson insists that the 86-DOS software was his original work, and has denied referring to or otherwise using CP/M code while writing it.[20] After the 2004 book appeared, he sued the authors and publishers for defamation.[21] The court ruled in summary judgement that no defamation had occurred, as the book's claims were opinions based on research or were not provably false.[22]

{{anchor|0.10|0.11|0.20|0.30|0.33|0.34}}{{anchor|0.42|0.56|0.60|0.74|0.75|0.76|0.80|1.00|1.01|1.10}}Versions

QDOS 0.101980-07|none}} Roughly half completed version of the OS.[2] It implemented the original form of Paterson's derivation of Microsoft's FAT filesystem. In contrast to the earlier 8-bit FAT filesystem found in Standalone Disk BASIC-86, this variant already supported 12-bit table elements,[24] reduced the number of FATs from 3[25] to 2, redefined the semantics of some of the reserved cluster values, and modified the disk layout, so that the root directory was now located between the FAT and the data area. Paterson also increased the previous 9-character length limit to 11 characters in order to support CP/M-style 8.3 filenames and File Control Blocks. This variant, however, still used 16-bytes directory entries and therefore is not compatible with what became later known as FAT12 in MS-DOS/PC DOS. Possibly shipped already.[26]
QDOS 0.111980-08|none}} Bug fix[2] shipment.[2]
QDOS/86-DOS 0.21980-08|none}} EDLIN added. Renamed to 86-DOS by August 1980.[29]
86-DOS 0.31980-11-15}} First version licensed by SCP to Microsoft.[10]
86-DOS 0.331980-12|none}} First version distributed by SCP to OEMs and Microsoft as 86-DOS.[2][10]
86-DOS 0.34[33]1980-12-29}}[33] Cleaned up release for SCP OEMs including Microsoft.
86-DOS 0.42[33]1981-02-25}}[33] At the indirect request of IBM (through Microsoft[14]) size of directory entries changed from 16 to 32 bytes (similar to MDOS/MIDAS) in order to add support for a last-modified date stamp (2 bytes) and theoretical file sizes larger than 16 MB (4 bytes),[38] thereby implementing the earliest form of the 12-bit FAT file system logically fully compatible with what became known as FAT12 in MS-DOS/PC DOS later on. 86-DOS retained the capability to read volumes written under older versions of 86-DOS up to MS-DOS 1.14 at the least, whereas generic MS-DOS 1.20 / PC DOS 1.1 and higher no longer supported it.
86-DOS 0.56[33]1981-03-23}}[33] Support for disk blocking/deblocking as requested since 1981-01-15.[14]
86-DOS 0.60[33]1981-03-27}}[33] The file DOSIO.ASM found in 86-DOS 1.00 mentions that it is the "I/O System for 86-DOS version 0.60 and later".[44]
86-DOS 0.74[33]1981-04-15}}[33] Added device files.
86-DOS 0.75[33]1981-04-17}}[33] Bug fix.
86-DOS 0.76[33]1981-04-23}}[33] Bug fix.
86-DOS 0.80[33]1981-04-27}}[33] Added system calls.
86-DOS 1.00[26][33]1981-04-28}}[33] Modified system calls.[2][26][44][59]
86-DOS 1.01[33]1981-05-12}}[33] Bug fix.
86-DOS 1.10[33]1981-07-21}}[33] Purchased by Microsoft and renamed to MS-DOS on 1981-07-27,[14][26] therefore the last version with genuinely matching 86-DOS and MS-DOS version numbers. First version known to implement the 'hidden' attribute.
86-DOS 1.14[26]1981-10/11}} According to Tim Paterson PC DOS 1.0 basically reflects 86-DOS 1.14,[26] other sources find a match of PC DOS 1.0 with MS-DOS/86-DOS 1.10 as of 1981-07-21 more likely.

Features

Commands

The following list of commands is supported by 86-DOS.[1]

Internal commands

{{div col|colwidth=9em}}
  • CLEAR
  • COPY
  • DIR
  • ERASE
  • RENAME
  • TYPE
{{div col end}}

External commands

{{div col|colwidth=9em}}
  • ASM
  • CHKDSK
  • DEBUG
  • EDLIN
  • HEX2BIN
  • MAKRDCPM
  • RDCPM
  • SYS
  • TRANS
{{div col end}}
EDLIN
{{Main|EDLIN}}

By 1982, when IBM asked Microsoft to release a version of DOS that was compatible with a hard disk, PC DOS 2.0 was an almost complete rewrite of DOS, so by March 1983, very little of 86-DOS remained. The most enduring element of 86-DOS was its primitive line editor, EDLIN, which remained the only editor supplied with Microsoft versions of DOS until the June 1991 release of MS-DOS 5.0, which included a TUI-based editor, MS-DOS Editor based on QBasic. EDLIN can still be used on contemporary machines, since there is an emulated DOS environment up to Windows 10 (32 bit).

Supported disk formats{{anchor|Formats}}

Seattle Computer Products' 86-DOS supported the FAT12 filesystem on a range of 8.0" and 5.25" floppy disk drives on S-100 floppy disk controller hardware manufactured by Cromemco, Tarbell Electronics and North Star Computers. The Western Digital FD1771-based Cromemco and Tarbell boards supported one-sided single-density soft-sectored drives. A Tarbell double-density board utilizing the FD1791 was supported as well. At a later stage, SCP offered advanced floppy disk controllers like the Disk Master series themselves.

86-DOS itself did not take advantage of a FAT ID byte or BPB (as later DOS issues do) to distinguish between different media formats; instead different drive letters were hard-coded (at time of compilation) to be associated with different physical floppy drives, sides and densities, that is, depending on its type, a disk had to be addressed under a certain drive letter to be recognized correctly (a concept later emulated with more flexibility by DRIVER.SYS under DOS 3.x and higher).

Two logical format variants of the 86-DOS 12-bit FAT format existed, the original format with 16-byte directory entries and the later format (since 86-DOS 0.42) with 32-byte directory entries. Only the second one is logically compatible with the FAT12 format known since the release of MS-DOS and PC DOS. MS-DOS still cannot mount such volumes as in absence of a BPB it falls back to retrieve the FAT ID in the FAT entry for cluster 0 to choose among hard-coded disk geometry profiles. In all formats of a volume formatted under MS-DOS which would otherwise be supported by both systems (and typically also in all other formats), this ID is located in the first byte of logical sector 1 (that is, the volume's second sector with physical CHS address 0/0/2 or LBA address 1), since MS-DOS assumes a single reserved sector (for the boot sector). Under 86-DOS, the reserved sectors area is significantly larger (whole tracks), and therefore the prototypical FAT ID 0xFE (and 0xFF) is located elsewhere on disk making it impossible for MS-DOS to retrieve it, and even if it would, the hard-coded disk profile associated with it would not take this larger reserved sectors region under 86-DOS into account.

CP/M 2 floppy media were readable through RDCPM.

86-DOS did not offer any specific support for fixed disks by itself, but third-party solutions in form of hard disk controllers and corresponding I/O system extensions for 86-DOS were available from companies like Tallgrass, making hard disks accessible similar to superfloppies within the size limits of the FAT12 file system.

ar | Size 8" 8" 8" 5.25" 5.25"
ar | Density SD DD DD SD SD
ar | Modulation FM MFM MFM FM FM
ar | Formatted capacity (KB) 250.25[44]616[44]1232[44]90[44]87.5[44]
ar | Cylinders (CHS) 77 77 77 40 35
ar | Physical sectors / track 26 8 8 18 10
ar | Number of heads 1 1 2 1 1
ar | Byte payload / physical sector 128 1024 1024 128 256
ar | Bytes / logical sector 128 1024 1024 128 256
ar | Logical sectors / cluster 4 1 1 2 1
ar | Reserved logical sectors 52 (2 tracks) 1 1 54 (3 tracks) 30 (3 tracks)
ar | Number of FATs 2 2 2 2 2
ar | Root directory entries
(á 32 bytes,
86-DOS 0.42 and higher only)		 64 (16 sectors) 96 (3 sectors) 128 (4 sectors) 64 (16 sectors) 64 (8 sectors)
ar | Root directory entries
(á 16 bytes)		 64 ? ? 64 N/A
ar | Total logical sectors 2002 616 1232 720 350
ar | Logical sectors / FAT 6? ? ? ? ?
ar | Hidden sectors 0 0 0 0 0
ar | Logical sector order ? ? ? ? ?
ar | Sector mapping sector+/ track+ sector+/ track+ sector+/ head+/ track+ sector+/ track+ sector+/ track+
ar | First physical sector 1 1 1 1 0
ar | Sector index Soft Soft Soft Soft Hard (10+1)
ar | Controller type Cromemco/Tarbell FD1771 Tarbell FD1791 Tarbell FD1791 Cromemco FD1771 NorthStar
ar | FAT ID No (FEh) No (FEh) No (FEh) No (FEh) No (FEh)
ar | BPB Presence No No No No No

Various OEM versions of MS-DOS 1.2x and 2.x supported a number of similar 8.0" FAT12 floppy disk formats as well, although not identical to those supported by 86-DOS.

Disk formats supported by one of the last versions developed by Tim Paterson at Microsoft, MS-DOS 1.25[33][83][84][85] (March 1982) for the SCP Gazelle computer with SCP controller or Cromemco 16FDC controller (by default, this version only supported the MS-DOS-compatible variants of the 8.0" formats with a single reserved sector but it could be built to provide two extra drive letters to read and write floppies in the previous SCP 86-DOS 8.0" disk formats since 0.42 as well):

ar | Size 8" 8" 8" 8" 8" 5.25" 5.25" 5.25"
ar | Density SD SD DD DD DD SD DD DD
ar | Modulation FM FM MFM MFM MFM FM MFM MFM
ar | Formatted capacity (KB)250.25 (SCP) 250.25 (MS) 616 1232 (SCP) 1232 (MS) 90 160 320
ar | Cylinders (CHS) 77 77 77 77 77 40 40 40
ar | Physical sectors / track 26 26 8 8 8 18 8 8
ar | Number of heads 1 1 1 2 2 1 1 2
ar | Byte payload / physical sector 128 128 1024 1024 1024 128 512 512
ar | Bytes / logical sector 128 128 1024 1024 1024 128 512 512
ar | Logical sectors / cluster 4 4 1 1 1 2 1 2
ar | Reserved logical sectors52 (2 tracks) 1 1 1 1 54 (3 tracks) 1 1
ar | Number of FATs 2 2 2 2 2 2 2 2
ar | Root directory entries
(á 32 bytes)		64 (16 sectors) 68 (17 sectors) 96 (3 sectors) 128 (4 sectors) 192 (6 sectors) 64 (16 sectors) 64 (4 sectors) 112 (7 sectors)
ar | Total logical sectors 2002 2002 616 1232 1232 720 320 640
ar | Logical sectors / FAT6? 6 1 ? 2 4 1 1
ar | Hidden sectors 0 0 0 0 0 0 0 0
ar | Total number of clusters ? 497 ? ? 1227 ? 313 315
ar | Logical sector order ? ? ? ? ? ? ? ?
ar | Sector mapping sector+/ track+ sector+/ track+ sector+/ track+ sector+/ head+/ track+ sector+/ head+/ track+ sector+/ track+ sector+/ track+ sector+/ head+/ track+
ar | First physical sector 1 1 1 1 1 1 1 1
ar | Sector index Soft Soft Soft Soft Soft Soft Soft Soft
ar | Controller type Cromemco / Tarbell FD1771 Cromemco / Tarbell FD1771 Tarbell FD1791 / FD1793 Tarbell FD1791 / FD1793 Tarbell FD1791 / FD1793 Cromemco 4FDC FD1771 SCP / Cromemco 16FDC SCP / Cromemco 16FDC
ar | FAT ID FEh FEh FEh FEh FEh FEh FEh FFh
ar | BPB Presence No No No No No No No No

In 1984 Seattle Computer Products released an OEM version of MS-DOS 2.0 for the SCP S-100 computer with SCP-500 Disk Master Floppy controller. It added support for 5.25" DD/1S (180 KB) and DD/2S (360 KB) FAT12 formats and supported the older formats as well, although possibly with some of the parameters modified compared to MS-DOS 1.25.[99]

See also

  • MIDAS
  • MSX-DOS

Notes

1. ^86-DOS User's Manual - Version 0.3
2. ^1 {{cite book|title=Fire in the Valley: The Making of the Personal Computer|author-last1=Freiberger|author-first1=Paul|author-link1=Paul Freiberger|author-first2=Michael|author-last2=Swaine|author-link2=Michael Swaine (technical author)|orig-year=1984|edition=2nd|date=2000|publisher=McGraw-Hill|location=New York|isbn=0-07-135892-7|pages=332–333|url=http://www.fireinthevalley.com/|deadurl=yes|archiveurl=https://web.archive.org/web/20060831122510/http://www.fireinthevalley.com/|archivedate=2006-08-31|df=}}
3. ^1 2 3 {{Cite book |editor-first1=Jim |editor-last1=Beley |editor-first2=Barry |editor-last2=Preppernau |editor-first3=Pam |editor-last3=Beason |editor-first4=Andrea |editor-last4=Lewis |editor-first5=David |editor-last5=Rygmyr |author-first1=Howard |author-last1=Bornstein |author-first2=Lawrence |author-last2=Bredehoeft |author-first3=Ray |author-last3=Duncan |author-first4=Carol |author-last4=Morris |author-first5=David |author-last5=Rose |author-first6=John |author-last6=Socha |author-link6=John Socha |author-first7=Jim |author-last7=Tomlin |author-first8=Kathleen |author-last8=Vian |author-first9=Van |author-last9=Wolverton |title=MS-DOS (Versions 1.0-3.2) Technical Reference Encyclopedia |contribution=Technical advisors |contributor-first1=Paul |contributor-last1=Allen |contributor-link1=Paul Allen |contributor-first2=Bill |contributor-last2=Gates |contributor-link2=Bill Gates |contributor-first3=Adrian |contributor-last3=King |contributor-first4=Chris |contributor-last4=Larson |contributor-first5=Gordon |contributor-last5=Letwin |contributor-link5=Gordon Letwin |contributor-first6=Bob |contributor-last6=O'Rear |contributor-link6=Bob O'Rear |contributor-first7=Tim |contributor-last7=Paterson |contributor-link7=Tim Paterson |contributor-first8=Chris |contributor-last8=Peters |contributor-first9=Bruce |contributor-last9=Phillips |contributor-first10=Aaron |contributor-last10=Reynolds |contributor-link10=Aaron R. Reynolds |contributor-first11=Betty |contributor-last11=Stillmaker |contributor-first12=Mark |contributor-last12=Zbikowski |contributor-link12=Mark Zbikowski |date=1986 |edition=Original withdrawn |publisher=Microsoft Press |series=Microsoft Reference Library |volume=1 |location=Redmond, Washington, USA |isbn=0-914845-69-1 |lccn=86-8640 |oclc=635600205}} (xvii+1053 pages; 29 cm) (NB. This original edition contains flowcharts of the internal workings of the system. It was withdrawn by Microsoft before mass-distribution in 1986 because it contained many factual errors as well as some classified information which should not have been published. Few printed copies survived. It was replaced by a completely reworked edition in 1988. [https://blogs.msdn.microsoft.com/larryosterman/2004/06/14/does-anyone-remember-the-original-ms-dos-encyclopedia/])
4. ^1 {{Cite book |title=The MS-DOS Encyclopedia: versions 1.0 through 3.2 |author-first1=Ray |author-last1=Duncan |author-first2=Steve |author-last2=Bostwick |author-first3=Keith |author-last3=Burgoyne |author-first4=Robert A. |author-last4=Byers |author-first5=Thom |author-last5=Hogan |author-first6=Jim |author-last6=Kyle |author-first7=Gordon |author-last7=Letwin |author-link7=Gordon Letwin |author-first8=Charles |author-last8=Petzold |author-link8=Charles Petzold |author-first9=Chip |author-last9=Rabinowitz |author-first10=Jim |author-last10=Tomlin |author-first11=Richard |author-last11=Wilton |author-first12=Van |author-last12=Wolverton |author-first13=William |author-last13=Wong |author-first14=JoAnne |author-last14=Woodcock |contribution=Technical advisors |contributor-first1=Mark |contributor-last1=Zbikowski |contributor-link1=Mark Zbikowski |contributor-first2=Paul |contributor-last2=Allen |contributor-link2=Paul Allen |contributor-first3=Steve |contributor-last3=Ballmer |contributor-link3=Steve Ballmer |contributor-first4=Reuben |contributor-last4=Borman |contributor-first5=Rob |contributor-last5=Borman |contributor-first6=John |contributor-last6=Butler |contributor-first7=Chuck |contributor-last7=Carroll |contributor-first8=Mark |contributor-last8=Chamberlain |contributor-first9=David |contributor-last9=Chell |contributor-first10=Mike |contributor-last10=Colee |contributor-first11=Mike |contributor-last11=Courtney |contributor-first12=Mike |contributor-last12=Dryfoos |contributor-first13=Rachel |contributor-last13=Duncan |contributor-first14=Kurt |contributor-last14=Eckhardt |contributor-first15=Eric |contributor-last15=Evans |contributor-first16=Rick |contributor-last16=Farmer |contributor-first17=Bill |contributor-last17=Gates |contributor-link17=Bill Gates |contributor-first18=Michael |contributor-last18=Geary |contributor-first19=Bob |contributor-last19=Griffin |contributor-first20=Doug |contributor-last20=Hogarth |contributor-first21=James W. |contributor-last21=Johnson |contributor-first22=Kaamel |contributor-last22=Kermaani |contributor-first23=Adrian |contributor-last23=King |contributor-first24=Reed |contributor-last24=Koch |contributor-first25=James |contributor-last25=Landowski |contributor-first26=Chris |contributor-last26=Larson |contributor-first27=Thomas |contributor-last27=Lennon |contributor-first28=Dan |contributor-last28=Lipkie |contributor-first29=Marc |contributor-last29=McDonald |contributor-link29=Marc McDonald |contributor-first30=Bruce |contributor-last30=McKinney |contributor-first31=Pascal |contributor-last31=Martin |contributor-first32=Estelle |contributor-last32=Mathers |contributor-first33=Bob |contributor-last33=Matthews |contributor-first34=David |contributor-last34=Melin |contributor-first35=Charles |contributor-last35=Mergentime |contributor-first36=Randy |contributor-last36=Nevin |contributor-first37=Dan |contributor-last37=Newell |contributor-first38=Tani |contributor-last38=Newell |contributor-first39=David |contributor-last39=Norris |contributor-first40=Mike |contributor-last40=O'Leary |contributor-first41=Bob |contributor-last41=O'Rear |contributor-link41=Bob O'Rear |contributor-first42=Mike |contributor-last42=Olsson |contributor-first43=Larry |contributor-last43=Osterman |contributor-first44=Ridge |contributor-last44=Ostling |contributor-first45=Sunil |contributor-last45=Pai |contributor-first46=Tim |contributor-last46=Paterson |contributor-link46=Tim Paterson |contributor-first47=Gary |contributor-last47=Perez |contributor-first48=Chris |contributor-last48=Peters |contributor-first49=Charles |contributor-last49=Petzold |contributor-link49=Charles Petzold |contributor-first50=John |contributor-last50=Pollock |contributor-first51=Aaron |contributor-last51=Reynolds |contributor-link51=Aaron R. Reynolds |contributor-first52=Darryl |contributor-last52=Rubin |contributor-first53=Ralph |contributor-last53=Ryan |contributor-first54=Karl |contributor-last54=Schulmeisters |contributor-first55=Rajen |contributor-last55=Shah |contributor-first56=Barry |contributor-last56=Shaw |contributor-first57=Anthony |contributor-last57=Short |contributor-first58=Ben |contributor-last58=Slivka |contributor-first59=Jon |contributor-last59=Smirl |contributor-first60=Betty |contributor-last60=Stillmaker |contributor-first61=John |contributor-last61=Stoddard |contributor-first62=Dennis |contributor-last62=Tillman |contributor-first63=Greg |contributor-last63=Whitten |contributor-first64=Natalie |contributor-last64=Yount |contributor-first65=Steve |contributor-last65=Zeck |date=1988 |edition=Completely reworked |publisher=Microsoft Press |location=Redmond, Washington, USA |isbn=1-55615-049-0 |lccn=87-21452 |oclc=16581341 |page=20}} (xix+1570 pages; 26 cm) (NB. This edition was published in 1988 after extensive rework of the withdrawn 1986 first edition by a different team of authors. [https://www.pcjs.org/pubs/pc/reference/microsoft/mspl13/msdos/encyclopedia/])
5. ^1 {{cite podcast |url = http://www.twit.tv/73 |title = this WEEK in TECH |website = The TWiT Netcast Network |date = 2006-10-16 |access-date = 2006-11-28 |archiveurl = https://archive.is/20130418203921/http://www.twit.tv/73 |archivedate = 2013-04-18 |deadurl = yes |df = }}
6. ^1 {{cite book |author-first1=Harold |author-last1=Evans |author-link1=Harold Evans |author-first2=Gail |author-last2=Buckland |author-first3=David |author-last3=Lefer |author-link3=David Lefer |date=2004 |title=They Made America: From the Steam Engine to the Search Engine: Two Centuries of Innovators |publisher=Little, Brown and Co. |isbn=0-316-27766-5}}
7. ^1 {{cite journal|title=The Origins of DOS: DOS Creator Gives His View of Relationship Between CP/M, MS-DOS|author-last=Paterson|author-first=Tim|author-link=Tim Paterson|journal=Microprocessor Report|publisher=MicroDesign Resources (MDR)|volume=8|issue=13|date=1994-10-03|issn=0899-9341|url=http://www.ece.umd.edu/courses/enee759m.S2000/papers/paterson1994-kildall.pdf|archive-url=https://web.archive.org/web/20120531090452/http://www.ece.umd.edu/courses/enee759m.S2000/papers/paterson1994-kildall.pdf|archive-date=2012-05-31}}
8. ^1 {{cite news|title=Programmer sues author over role in Microsoft history|agency=Associated Press|date=2005-02-03|work=USA Today|url=https://www.usatoday.com/tech/news/2005-03-02-ms-coding-dis_x.htm|access-date=2006-11-28}}
9. ^1 {{cite web|title=Design of DOS|author-first=Tim|author-last=Paterson|author-link=Tim Paterson|work=DosMan Drivel|date=2007-09-30|url=http://dosmandrivel.blogspot.com/2007/09/design-of-dos.html|access-date=2011-07-04|archive-url=https://web.archive.org/web/20130120075653/http://dosmandrivel.blogspot.com/2007/09/design-of-dos.html|archive-date=2013-01-20}}
10. ^1 2 3 4 5 6 7 8 9 10 11 {{cite web|title=The Roots of DOS: Tim Paterson|author-first=David|author-last=Hunter|publisher=Softalk|date=March 1983|url=http://www.patersontech.com/dos/softalk.aspx|access-date=2013-08-18}}
11. ^1 {{cite web|title=SCP 86-DOS 1.0 Addendum|author=Seattle Computer Products|author-link=Seattle Computer Products|date=1981|url=http://bitsavers.informatik.uni-stuttgart.de/pdf/seattleComputer/86-DOS_1.0_Addendum.pdf|accessdate=2013-04-02}}
12. ^1 2 3 4 5 6 {{cite journal|title=A Short History of MS-DOS|author-last=Paterson|author-first=Tim|author-link=Tim Paterson|date=June 1983|journal=Byte|issn=0360-5280|volume=8|edition=6|url=http://www.patersontech.com/dos/byte%E2%80%93history.aspx|access-date=2013-08-18}} (NB. This source mentions the 1981-07-27 as the date of purchase.)
13. ^1 {{cite episode |title=Part II |url=https://www.pbs.org/nerds/part2.html |series=Triumph of the Nerds: The Rise of Accidental Empires |credits=Cringely, Robert X. |network=PBS |airdate=June 1996 |season=1}}
14. ^1 {{cite web|title=86-DOS - 8086 OPERATING SYSTEM - $95|author=Seattle Computer Products|author-link=Seattle Computer Products|journal=Byte|volume=5|series=8|page=174|date=August 1980|url=https://archive.org/stream/byte-magazine-1980-08/1980_08_BYTE_05-08_The_Forth_Language#page/n173/mode/2up|access-date=2013-08-18}} (NB. The SCP advertisement already calls the product 86-DOS, but does not mention a specific version number. Version 0.3 is known to be called 86-DOS already, so the name change must have taken place either for version 0.2 or immediately afterwards in August 1980.)
15. ^1 {{cite book|author-first1=Andrew|author-last1=Schulman|author-first2=Ralf D.|author-last2=Brown|author-link2=Ralf D. Brown|author-first3=David|author-last3=Maxey|author-first4=Raymond J.|author-last4=Michels|author-first5=Jim|author-last5=Kyle|title=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|publisher=Addison Wesley|edition=2|date=1994|isbn=0-201-63287-X|id={{ISBN|978-0-201-63287-3}}}}
16. ^1 {{cite journal|author-last=Paterson|author-first=Tim|author-link=Tim Paterson|title=An Inside Look at MS-DOS - The design decisions behind the popular operating system|journal=Byte|publisher=Byte Publications Inc.|volume=8|series=6|date=June 1983|url=https://archive.org/stream/byte-magazine-1983-06/1983_06_BYTE_08-06_16-Bit_Designs#page/n229/mode/2up|access-date=2013-10-19|pages=230}} (NB. The article often uses "MS-DOS" to refer to both 86-DOS and MS-DOS, but mentions QDOS and 86-DOS in a sidebar article, "A Short History of MS-DOS".)
17. ^1 {{cite journal|author-first=Jim|author-last=Edlin|title=CP/M Arrives - IBM releases a tailed-for-the-PC version of CP/M-86 that profits from the learning curve|journal=PC Magazine|date=1982-06-07|url=https://books.google.com/books?id=w_OhaFDePS4C&lpg=RA2-PA18&pg=RA2-PA43#v=onepage&q&f=true|access-date=2013-10-21|pages=43}}
18. ^1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 {{cite web|author-first=Tim|author-last=Paterson|author-link=Tim Paterson|title=Microsoft DOS V1.1 and V2.0: /msdos/v11source/MSDOS.ASM|url=http://www.computerhistory.org/atchm/microsoft-research-license-agreement-msdos-v1-1-v2-0/|publisher=Computer History Museum, Microsoft|date=2013-12-19|orig-year=1983|access-date=2014-03-25}} (NB. While the publishers claim this would be MS-DOS 1.1 and 2.0, it actually is SCP MS-DOS 1.25 and a mixture of Altos MS-DOS 2.11 and TeleVideo PC DOS 2.11.)
19. ^1 {{Cite web|url=http://www.computerhistory.org/atchm/microsoft-ms-dos-early-source-code/|title=Microsoft MS-DOS early source code|series=Software Gems: The Computer History Museum Historical Source Code Series|author-first=Len|author-last=Shustek|date=2014-03-24|access-date=2014-03-29}} (NB. While the author claims this would be MS-DOS 1.1 and 2.0, it actually is SCP MS-DOS 1.25 and a mixture of Altos MS-DOS 2.11 and TeleVideo PC DOS 2.11.)
20. ^1 {{cite web|url=http://blogs.technet.com/b/microsoft_blog/archive/2014/03/25/microsoft-makes-source-code-for-ms-dos-and-word-for-windows-available-to-public.aspx|title=Microsoft makes source code for MS-DOS and Word for Windows available to public|date=2014-03-25|author-first=Roy|author-last=Levin|work=Official Microsoft Blog|access-date=2014-03-29}} (NB. While the author claims this would be MS-DOS 1.1 and 2.0, it actually is SCP MS-DOS 1.25 and a mixture of Altos MS-DOS 2.11 and TeleVideo PC DOS 2.11.)
21. ^1 {{cite web |url=http://bartosh.us/s-100/ |archive-url=https://web.archive.org/web/20130904203728/http://bartosh.us/s-100/ |title=Seattle Computer Products 8086 S-100 Bus Microcomputer - Picture of 8.0" DD/1S distribution floppy disks for SCP MS-DOS 2.0 |date=2009-11-22 |archive-date=2013-09-04 |access-date=2014-05-06}}
22. ^1 2 3 86-DOS version 0.3 (1980-11-15) License Agreement between Seattle Computer Products and Microsoft{{dead link |date=June 2017 |bot=InternetArchiveBot |fix-attempted=yes}}, signed 1981-01-06, published as part of the Comes v. Microsoft case as exhibit #1, retrieved 2013-04-01.
23. ^1 2 3 4 86-DOS Sales Agreement between Seattle Computer Products and Microsoft{{dead link |date=June 2017 |bot=InternetArchiveBot |fix-attempted=yes }}, dated 1981-07-27, published as part of the Comes v. Microsoft case as exhibit #2, retrieved 2013-04-01. (NB. The document also carries a typed date stamp as of 1981-07-22.)
24. ^1 Order (2007-07-25). Paterson v. Little, Brown, and Co., et al. W. D. Wash.. Retrieved on 2007-08-03.
25. ^1 2 3 4 5 6 7 http://www.86dos.org/downloads/86DOS_FILES.ZIP, A ZIP file containing most of the files from 86-DOS 0.75 (1981-04-17/1981-04-18) to 1.00/1.10 (1981-07-21)
26. ^1 86-DOS 1.00 disk images for SIMH simulator
27. ^1 MS-DOS 1.25 disk images for SIMH simulator

}}

References

{{reflist|refs=[2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]
}}

External links

  • 86-DOS documentation from Paterson Technology
  • Run SCP 86-DOS 1.0 in the Altair 8800 SIMH simulator by Howard M. Harte
{{DEFAULTSORT:86-Dos}}

8 : Microcomputer software|Disk operating systems|DOS issues|Floppy disk-based operating systems|Discontinued operating systems|Proprietary operating systems|1979 software|Software written primarily in assembly language
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