This page was last modified 12:25, 1 June 2020 by Gdx. Based on work by Mars2000you and NYYRIKKI and others.



Returns to MSX-BASIC / Disk BASIC environment and can optionally start a BASIC program.


  • if a MSX-DOS 2 / Nextor RAM Disk has been set up with RAMDISK, then it can still be used from BASIC
  • MSX-DOS 2 environment variables are usable from BASIC using standard BDOS calls.


Under MSX-DOS 1

BASIC <BasicProgram>

The parameter is optional

Under MSX-DOS 2 / Nextor

BASIC <Device>:\<Path>\<BasicProgram>

All parameters are optional.


  • Character backslash (\) serves as a separator between the folders and the file name in MSX-DOS2. You don't have to put it after the colon of the device name. Backslash is replaced by the character yen (¥) on Japanese MSX or the character won (₩) on Korean MSX.


<Device> is the name for used device. This parameter is only available under MSX-DOS 2 / Nextor and It can only be a disk drive.

If you don't specify the drive, the computer will use the currently active drive (by default, it's drive A:)

Device type Device name Remark
Disk drive A, B, C, D, E, F, G, H A floppy disk interface can control until 2 drives.

<Path> is used to specify the location in folders of the BASIC program you want to start. Each folder name in path are separate by a backslash (\). This parameter is only available under MSX-DOS 2 / Nextor.

<BasicProgram> is the complete name of the BASIC program that you want to start. It must include the extension (.BAS, .LDR, etc...) when this extension is present. If you don't specify a BASIC program, you will simply go to the MSX-BASIC screen.


Under MSX-DOS 1 and higher


Under MSX-DOS 2 / Nextor


Related to



MSX-DOS 1 with COMMAND.COM, MSX-DOS 2 / Nextor with COMMAND2.COM v2.20 and higher