AMSDOS

AMSDOS

Infobox OS
name = AMSDOS



caption =
developer = Amstrad
source_model = Closed source
kernel_type =
supported_platforms =
ui = None, access through BASIC and firmware calls
family = Disk operating systems
released = 1984
latest_release_version =
latest_release_date =
latest_test_version =
latest_test_date =
marketing_target =
programmed_in =
prog_language = Locomotive BASIC
language =
updatemodel =
package_manager =
working_state = Discontinued
license =
website =

AMSDOS is a disk operating system for the 8-bit Amstrad CPC Computer (and various clones). The name is a contraction of Amstrad Disc Operating System.

AMSDOS first appeared in 1984 on the CPC 464, with added 3 inch disk drive, and then on the CPC 664 and CPC 6128. Relatively fast and efficient for its time, AMSDOS was quicker and more effective than most of its contemporaries.

AMSDOS was provided built-in to ROM (either supplied with the external disk drive or in the machine ROM, depending on model) and was accessible through the built-in Locomotive BASIC as well as through firmware routines. Its main function was to map the cassette access routines (which were built-in to every CPC model) through to a disk drive. This enabled the majority of cassette-based programs to work with a disk drive with no modification. AMSDOS was able to support up to two connected disk drives.

Alternatives

Other disk operating systems for the Amstrad range included CP/M (which was also bundled with an external disk drive, or built-in on ROM depending on model) and RAMDOS, which allowed the full (800K) capacity of single-density 3 ½" disks to be used providing a suitable drive was connected.


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