will say file is full. You can use the S-CHORD, R command to
read the rest of the directory after you have made room.
Using the Serial Interface
You can control the disk drive accessory from any serial
device by using the optional serial cable available from
Freedom Scientific.
The disk drive accessory is set to operate at 9600 baud, 8
data bits, no parity and 1 stop bit. When you power on the disk
drive you will get a command prompt character `at `. To use
the diskette from a serial device simply replace the S-CHORD
in the commands above with a control-E character (ASCII
decimal 5 ENQ character), and end the command with a
carriage return instead of an E-CHORD. For example, to get a
directory of all files on the diskette send "control-ED-
RETURN." These are only 3 characters: one for control E, one
for the letter D and a carriage return. Getting a directory of all
files ending in .BRL would require the command "control-
ED*.BRL-RETURN." Whenever a command is completed
successfully a control Z character is sent from the disk drive. If
an error occurs, an error character is sent. This single
character can be interpreted using TABLE 3.1 to determine
the error.
IMPORTANT: When storing data to the diskette from the serial
interface use the command "control-ESFNAME-RETURN".
This command tells the diskette to create the file "FNAME" on
the disk and to wait for data to come in the serial port. As data
is received it is put onto the diskette sector by sector. The
diskette will continue waiting for data until it receives a
"control-Z" character. This is the end of file character and tells
the disk drive to write the last block onto the diskette and to
update the directory information. The disk drive uses
12 Part # 440057-001 Rev. A
