In MS-DOS, the command to copy all files from drive A: (typically a floppy disk) to the directory C:\TBASIC is:

COPY A:\*.* C:\TBASIC

Explanation:

• COPY — the file copy command.

• A:\*.* — selects all files (*.*) on the A: drive, regardless of name or extension.

• C:\TBASIC — the destination directory.

Notes:

1. The directory must exist on C: before running this. If it doesn’t, create it first:

   MD C:\TBASIC
   

2. If you want to include subdirectories, COPY alone won’t do that — it copies only files, not folders. To recursively copy directories (if your DOS version supports it), use:

   XCOPY A:\ C:\TBASIC /S /E
   

   • /S copies subdirectories except empty ones.

   • /E copies empty directories as well.

3. If your MS-DOS version doesn’t include XCOPY (some early ones didn’t), you’ll have to manually create subdirectories and run COPY for each.

Would you like me to show a version that also verifies each file after copying (for data integrity on floppy transfers)?