DR DOS 5.x
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.
Release notes
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.
Downloads
| 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 |