MS-DOS 1.21
| Version of MS-DOS | |
 | |
| Version | 1.21 |
|---|---|
| Release date | 1982-01 |
| Replaces | |
| MS-DOS 1.20 | |
| Replaced by | |
| MS-DOS 1.22 | |
According to MS-DOS 2.11 source code, MS-DOS 1.21 is an unreleased internal version of MS-DOS.
Change log[edit | edit source]
1.21 01/06/82 HIGHMEM switch to run DOS in high memory