DR DOS is an MS-DOS compatible operating system from Digital Research that evolved from their earlier CP/M-86 based products Concurrent DOS and DOS Plus.
Version "4" was skipped to avoid being associated with the disaster called IBM-PC DOS 4.0 and MS-DOS 4.0.
New features include ViewMAX, a GEM-based GUI file management shell, the BatteryMAX power management system, bundled disk-caching software, and HMA and UMB memory use that frees up conventional 640k.
Notice that this was released in May, 1990 well before MS-DOS 5.0. Microsoft was scrambling to get similar features in to MS-DOS 5.0, that they released in June 1991.
Download name | Version | Language | Architecture | File size | Downloads |
---|---|---|---|---|---|
Digital Research DR DOS 5.0 (12-13-1990) [Spanish] (5.25-360k) | 5.0 (12-13-1990) | Spanish | 438.35KB | 0 | |
Digital Research DR DOS 5.0 (2-1-1991) (Premier Innovations OEM) (3.5-1.44mb) | 5.0 (2-1-1991) (Premier Innovations OEM) | English | 774.87KB | 1 | |
Digital Research DR DOS 5.0 (6-15-1990) (5.25-360k) | 5.0 (6-15-1990) | English | 426.63KB | 0 | |
Digital Research DR DOS 5.0 (6-15-1990) (Highscreen OEM) [German] (5.25-360k) | 5.0 (6-15-1990) (Highscreen OEM) | German | 1.24MB | 1 | |
Digital Research DR DOS 5.0 (8-14-1990) (3.5-720k) | 5.0 (8-14-1990) | English | 429.04KB | 1 | |
Digital Research DR DOS 5.0 (8-14-1990) (5.25-360k) | 5.0 (8-14-1990) | English | 427.91KB | 0 | |
Digital Research DR DOS 5.0 (8-22-1990) (Highscreen OEM) [German] (5.25-360k) | 5.0 (8-22-1990) (Highscreen OEM) | German | 1.06MB | 1 |