Page "Disk operating system" Paragraph 12

* MSX-DOS, for the MSX computer standard.

Initial version, released in 1984, was nothing but MS-DOS 1. 0 ported to Z80 ; but in 1988 it evolved to version 2, offering facilities such as subdirectories, memory management and environment strings.

The MSX-DOS kernel resided in ROM ( built-in on the disk controller ) so basic file access capacity was available even without the command interpreter, by using BASIC extended commands.