Linked by Thom Holwerda on Sat 22nd May 2010 21:33 UTC
Windows "The first truly successful Microsoft Windows operating system is twenty years old today; Windows 3.0 was launched on the 22nd of May 1990 and was the successor to Windows 2.1x. The Graphics User interface (technically it was not an operating system) sat on top of MS-DOS and could run applications for the operating system from within a Window and many might fondly remember that it was available on 5.25-inch high density floppy disks. More significantly, it proved to be the perfect partner for Intel's then-new range of 386 processor, which bought protected mode and extended memory capabilities to the market."
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RE[4]: Technical detail
by kedwards on Sun 23rd May 2010 09:03 UTC in reply to "RE[3]: Technical detail"
kedwards
Member since:
2009-04-25

By the time of Windows 3.1, it seems like the distinction is blurred. Windows 3.1 used DOS as a bootloader and for some file access operations (and could even bypass those). Otherwise, it handled interrupts, memory management, task management, etc. in 32-bit protected mode. It may not be the best architecture, but it really sounds like a real operating system not merely a graphical shell or operating environment.


Windows 3.1 still relied upon DOS very heavily. It wasn't until Windows For Workgroups 3.11 that brought over some of the 32bit features that were in Windows 95. WFW 3.11 still required DOS for a few DOS drivers like CD-ROM and SCSI support. It was considered just an operating environment because DOS was required to be installed(and booted) first before you could install(and boot) Windows 3.XX.

http://pclt.cis.yale.edu/pclt/OPSYS/WFWG311.HTM

Edited 2010-05-23 09:12 UTC

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RE[5]: Technical detail
by Laurence on Mon 24th May 2010 07:26 in reply to "RE[4]: Technical detail"
Laurence Member since:
2007-03-26



Windows 3.1 still relied upon DOS very heavily. It wasn't until Windows For Workgroups 3.11 that brought over some of the 32bit features that were in Windows 95. WFW 3.11 still required DOS for a few DOS drivers like CD-ROM and SCSI support. It was considered just an operating environment because DOS was required to be installed(and booted) first before you could install(and boot) Windows 3.XX.

http://pclt.cis.yale.edu/pclt/OPSYS/WFWG311.HTM

The same could be said for Win95

Reply Parent Score: 2

RE[6]: Technical detail
by kedwards on Mon 24th May 2010 09:03 in reply to "RE[5]: Technical detail"
kedwards Member since:
2009-04-25


The same could be said for Win95


Not really. The Windows 95 boot sequence may look the same as DOS, it is actually quite different. IO.SYS in Windows 95 is 32bit and has CONFIG.SYS and AUTOEXEC.BAT commands built-in. IO.SYS is in charge of loading MSDOS.SYS(a text file with boot option flags) and the Registry. CONFIG.SYS and AUTOEXEC.BAT are optional in Windows 95(because the commands are already built into IO.SYS) and can be used to load 16bit DOS drivers if a Windows 32bit driver doesn't exist. Lastly IO.SYS automatically loads(unless you tell it otherwise) WIN.COM.

http://technet.microsoft.com/en-us/library/cc751413.aspx

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