Concurrent DOS 4.x

Originally an optional module for Concurrent CP/M-86 3.1, this version of Digital Research's CP/M provided basic compatibility with PC-DOS in 1983. Simple DOS applications that did not require hardware access can be ran on this. A stripped down single tasking version was released as DOS Plus and later DR-DOS.

Disk 1: Concurrent Startup Disk Disk 2: Concurrent Utilities Disk #1 Disk 3: Concurrent Utilities Disk #2 Disk 4: Concurrent Applications Disk Disk 5: Concurrent Hard-disk Maintenance Utility Disk

Note: Disks are serialized, so each copy will be unique. Note: Disk 1 is a 320K CP/M-86 formatted disk.

Installation instructions

This version is for the IBM PC/XT/AT computer.

Product type
OS
Vendor
Digital Research
Release date
1985
Minimum CPU
8088
User interface
GUI
Platform
CPM

Downloads

Download Name Version Language CPU File type File size
Digital Research Concurrent DOS 4.1 4.1 English x86 5¼ Floppy 406.88KB
Digital Research Concurrent DOS 4.1 (alt) 4.1 English x86 5¼ Floppy 406.96KB

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