3 ms·
No, you are thinking of 4.01 this is 4.0. Those are very different operating systems, this is DOS 3.2 + later abandoned very crude multitasking features. Rough
by chx 2y ago
No, you are thinking of 4.01 this is 4.0.
Those are very different operating systems, this is DOS 3.2 + later abandoned very crude multitasking features. Roughly.
And this matters because DOS 3.3 was a milestone.
4.01 comes from 4.00 which has nothing to do with 4.0 (yay for versions).
- geoelectric 2y agoIt’s stuff like this that sent me over to DR-DOS back in the day.
- snvzz 2y agoDR-DOS also open source now.
- roytam87 2y agoBut only OpenDOS 7.01, not older(DR DOS 3.30-7.00) or newer(7.02-8.0/8.1) versions.
- rnd0 2y agoThe whole opendos thing is pretty questionable, too. CPM is open source as is its' derivatives. Cool so far. But is DR-DOS a derivative of it? Or is it bound by the 'non commercial' license of the 90's which a) was revoked b)isn't exactly open source (limits distribution) in the first place. Microsofts' releases have the benefit of being unambiguous.
- davidgnz 2y agoOpenDOS isn't open-source, its source-available. The license reads more like trial software: "Caldera grants you a non-exclusive license to use the Software in source or binary form free of charge if your use of the Software is for the purpose of evaluating whether to purchase an ongoing license to the Software. The evaluation period for use by or on behalf of a commercial entity is limited to 90 days; evaluation use by others is not subject to this 90 day limit but is still limited to a reasonable period"
- rnd0 2y ago>And this matters because DOS 3.3 was a milestone DOS 3.3 couldn't understand large partitions -except for Compaq dos 3.31. But regular dos 3.3 couldn't. I don't think dos 3.2 could even understand extended partitions/logical drives -much less large disks. Still -pretty neat!
- tssva 2y ago“DOS 3.3 couldn't understand large partitions -except for Compaq dos 3.31.” This is not accurate. Several OEMs added proprietary variations of FAT which supported larger partitions. For instance I run Zenith MS-DOS 3.30+ which has this ability on a Zenith Z-161 XT compatible luggable. Compaq’s 3.31 added FAT16B support which allowed larger partitions and was the standard for larger partition support going forward in standard MS-DOS.
- happycube 2y agoThe source released is for the IBM-started version of DOS 4.0, but most of the talk here is about the Multitasking DOS 4 files (a binary copy of the first beta)
- cout 2y agoThanks for pointing that out. I was wondering why I couldn't find the source for dosshell!
- ComputerGuru 2y agoThis 4.0 code contains references to 4.00, though: https://github.com/microsoft/MS-DOS/blob/main/v4.0/src/BOOT/MSBOOT.ASM https://github.com/microsoft/MS-DOS/blob/main/v4.0/src/BOOT/...
- Lightkey 2y agoLike ComputerGuru said, even the README of the repository mentions both 4.0 and 4.00 as if they are the same.