title: Cromemco DOS
text: # Cromemco DOS
  
  Cromemco DOS or CDOS (an abbreviation for Cromemco Disk Operating System) is a CP/M-like operating system by Cromemco designed to allow users of Cromemco microcomputer systems to create and manipulate disk files using symbolic names.
  
  ## Overview
  
  CDOS was written in Zilog Z80 machine code. Due to the number of available programs available to run under Digital Research CP/M at that time, CDOS was designed to be upwards CP/M-compatible. Many programs written for CP/M versions up to and including version 1.33 run without modification under CDOS. However, programs written for CDOS generally do not run under CP/M.
  
  The Cromemco Z-2 had the ability to run Cromemco DOS. Besides CP/M 2.2 and Cromix, the Cromemco System One can also run Cromemco DOS. The Cromemco C-10 personal computer, introduced in 1982, also ran CDOS.
  
  An emulator for a Cromemco CDOS system exists.
  
  ## Commands
  
  The following list of commands are supported by Cromemco DOS.
  
  ### Intrinsic commands
  
  * BYE
  * DIR
  * ERA
  * REN
  * SAVE
  * TYPE
  
  Later versions also support the ATTR command.
  
  ### Extrinsic command programs
  
  * @ (Batch)
  * DUMP
  * EDIT
  * INIT (Initialize)
  * STAT (Disk Status)
  * WRTSYS (Write System)
  * XFER (Transfer)
  
  Later versions also support the MEMTEST command.
  
  