>fi 0<CR>  // Initialize logical drive 
>di 0<CR>  // Initialize disk
>fs<CR>    // Show logical drive status
>fl<CR>    // Directory listing


dx      /* disk */
'd' :	/* dd <phy_drv#> [<sector>] - Dump secrtor */
'i' :	/* di <phy_drv#> - Initialize disk */
's' :	/* ds <phy_drv#> - Show disk status */

bx      /* buffer */
'd' :	/* bd <addr> - Dump R/W buffer */
'e' :	/* be <addr> [<data>] ... - Edit R/W buffer */
'r' :	/* br <phy_drv#> <sector> [<n>] - Read disk into R/W buffer */
'w' :	/* bw <phy_drv#> <sector> [<n>] - Write R/W buffer into disk */
'f' :	/* bf <n> - Fill working buffer */

fx      /* file */
'i' :	/* fi <log drv#> - Initialize logical drive */
's' :	/* fs [<path>] - Show logical drive status */
'l' :	/* fl [<path>] - Directory listing */
'o' :	/* fo <mode> <name> - Open a file */
'c' :	/* fc - Close a file */
'e' :	/* fe - Seek file pointer */
'r' :	/* fr <len> - read file */
'd' :	/* fd <len> - read and dump file from current fp */
'w' :	/* fw <len> <val> - write file b/
'n' :	/* fn <old_name> <new_name> - Change file/dir name */
'u' :	/* fu <name> - Unlink a file or dir */
'k' :	/* fk <name> - Create a directory */
'a' :	/* fa <atrr> <mask> <name> - Change file/dir attribute */
't' :	/* ft <year> <month> <day> <hour> <min> <sec> <name> */
'x' :	/* fx <src_name> <dst_name> - Copy file */
'm' :	/* fm <logi drv#> <part type> <bytes/clust> - Create file system */
't' :	/* t [<year> <mon> <mday> <hour> <min> <sec>] */