Disk Commands - Texas Instruments Php 1240 Bedienungsanleitung

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TEXAS INSTRUMENTS
lf you h ave chosen to be selective, each file o n the diskette is pre-
sented by name, and you choose whether or not to delete it by ans-
wering the prompt DELETE (Y/N)? lf a file is protected, and you
choose to delete it, the prompt OVERRIDE PROTECTION (Y/N)?
appears. lf you want to delete the file even though it is marked as
protected, enter V. lf you do not wish t o delete i t, enter N. The Com-
puter will return an error message, but you can go on without any
difficulty by pressing (PROC'D).
MODIFY FILE PROTECTION - The Command Module enables you
to mark a file so that it cannot be written on. This means that a TI
BASIC program or data cannot be changed without removing its
protection with the Command Module. When you choose this op-
tion, the following screen appears.
MODIFY FILE PROTECTION
MASTER DISK (1-3)? 1
Your response indicates which disk drive contains the file you
want to modify. When you answer the prompt, the DISKNAME is fil-
led in. Then, enterthe name of the file you wish to alter. The answer
to the prompt PROTECT (Y/N)? determines if the file is to be pro-
tected from being written on. lf you answer Y,it is protected. lf you
answer N, it is not protected.
lf a file is protected, you cannot copy another file over it or rename
it with the Command Module. Attempts to perform these opera-
tions will cause an error message to appear. In TI BASIC, a protec-
ted data file may only be opened for input; in cannot be written to.
DISK COMMANDS
The second option on the mai n selection list of the Disk Manager
module is DISK COMMANDS. Choosing this option gives you ac-
cess to the commands that involve the entire disk.
DISK COMMANDS
1 CATALOG DISK
2 BACKUP DISK
3 MODIFY DISK NAME
4
INITIALIZE NEW DISK
YOUR CHOICE? 1
CATALOGUE DISK- Choose this option to get a catalogue of ali the
programs and data fil es o n the disk. When you choose it, the follo-
wing screen appears.
CATALOG DISK
MASTER DISK (1-3) 1
Choose the disk drive containing the diskette that you want catalo-
gued. As soon as you enter the disk drive number, the diskette's
name is filled in, and the following appears.
WHERE DO YOU WANT LISTING?
1 SCREEN
2 SOLID STATE PRINTER
3 RS232 INTERFACE
4 OTHER
YOUR CHOICE? 1
lf you choose 1, SCREEN, the listing appears o n the monitor sc-
reen. lf there are too many lines to fit on the screen, press and hold
te Space Bar unti l the lines stop scrolling. (Press and hold the Spa-
ce Bar once more to start scrolling again.)
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PHP 1240
lf you choose 2. SOLID STATE PRINTER, the entire catalogue is
printed on the Thermal Printer connected to the computer.
lf you choose 3, RS232 INTERFACE, the enti re catalogue is trans-
ferred to the RS 232 lnterface with default parameters. From t h ere
it may goto a li ne printer, through a modem, orto whatever device
is connected to RS2321nterface. See the RS2321nterface Manual
for more information on its use.
lf you choose 4, OTHER, the prompt DEVICE NAME appears. You
may then choose any device and file that you could choose if you
were using the
n
BASIC command OPEN. For example, you could
enter DISK1.CATLIST, and the catalogue would be put on the dis-
kette in Disk Drive One under the file name CATLIST.
The catalogue list has the following from.
DSK1 - DISKNAME = diskname
AVAILABLE = nnn USED = nnn
FILENAME SIZE TYPE P
AAAAAAAAAA
BBBBBBBBBB
cccccccccc
DDDDDDDDDDD
EEEEEEEEEE
nnn PROGRAM
nnn DISIVARnnn Y
nnn DIS/FIXnnn
nnn INTIVARnnn Y
nnn INT/FIXnnn
The chatacters after DISKNAME are the name you gave the disket-
te. The number shown after AVAILABLE is the number of sectors
that are available for use. The number shown after USED is the
number of sectors that are being used tosto re data and programs
plus the number of sectors that are not usable. The used and avai-
lable sectors total 358 (or 313) fora singlesided diskette and 718
(or 628) of a double-sided diskette.
The FILENAME is the name of the file, and SIZE is the number of
sectors used for the file. TYPE gives the parameters of the file. lf a
file type is PROGRAM, the file is probably a BASIC program. DIS/
VARnnn indicates a DISPLAY format file of VARIABLE length re-
cords, with a maximum record length of nnn characters. A file li-
sted as DIS/FIXnnn is a DISPLAY format file of FIXED length re-
cords, with a maximum record length of nnn characters. INT/
VARnnn designates an INTERNAL format file of VARIABLE length
record s. wirh an maximum record length of n nn characters, while a
file listed as INT/FIXnnn is an INTERNAL format file of FIXED length
records, with a record length of n nn characters. (Sec file Proces-
sing in the next section of this manual for an explanation of DIS-
PLAY versus INTERNAL formats and VARIABLE versus FIXED
length files.) The "P" column indicates whether or not the file is
protected,. lf a "Y" is present, the file cannot be written on.
BACKUP DISK- You choose this option when you want to make a
copy of a diskette. This is usually done so that you h ave a spare co-
PY of data and programs in case something happens to the origi-
nai. lt is also used to put files in order on a disk. Making a backup
copy compresses the information on the diskette to take as little
space as possible. (T o copy disks if you are using a single disk dri-
ve, follow the instructions given on the screen.)
Note: How long the backup takes depends o n two things: the num-
ber of fil es on the master diskette and the length of each file. Al so,
if the copy diskette has not previously been initialised, the initiali-
sing process will require approximately one additional minute. As
a generai rule,it takes about 20 seconds to copy 11.5K bytes of da-
ta.