Disk BASIC

It was an extended version of SEGA BASIC for use with SF-7000 only. There were some  more commands and statements for use of floppy disk and memory.

 It was distributed in a Floppy Disk media with some demo programs. The floppy has  a full capacity of 160k but only 65 k was free for basic programs storage.  Almost 18 Kbytes are available for developing.