Starting The System - Texas Instruments Php 1250 Handbuch

9. Having removed the termination packs !rom ali bui lhe lasl drive
(the one larthesl away !rom lhe Controller), connecl lhe drives in
seri es. The connectoron theendolthe second drive's cable plugs
inlo the adapler board in lhe middle ol lhe lirsl drive's cable. The
third drive is connecled lo lhe second drive in lhe same way.
Whelher you h ave two or lhree drive s. lhe drive larthesl away l rom
lhe conlroller should be the one lhal has noi been modilied.
The lirsl drive, the one connected directly lo lhe Conlroller Card. is
idenlilied as DSK1 by
n
BASIC. The second drive, connecled lo lhe
cable ol DSK
1,
is DSK2. The third drive is DSK3. The labels provi d ed
wilh your drive(s) can be used lo idenlily each drive.
CAUTI ON
Always disconnecl lhe Peripheral Expansion Syslem belore moving
the computer console. The cable connecting the console and peri-
pheral syslem is not designed lo suppor! the weighl ol the unils. T o
prevent damage, always disconnect ali devices before moving any
part of your Home Computer system. For long distance moves. remove
ali cards !rom the Peripheral Expansion System and repack lhe devi-
ces in their originai packing materia!.
STARTING THE SYSTEM
Alter lhe Controller has been inserted into lhe Peripheral Expansion
Syslem unii and the drives have been connecled, plug lhe power
cords into your eleclrical wall outlels. Next, turno n the power switches
o n the backs of your external disk drives (il any) and lhen the swilch o n
the front of the peripheral system unit. Note: When you turn on the
peripheral syslem, the internai disk drive is automalically turned o n.
WARNING
Each time you operate your computer/disk system, follow this
power-up sequence:
1. Turn on the external disk drives.
2. Turn on the Peripheral Expansion System unil
3. Then turn on the monitor and computer console.
For proper memory allocati o n by lhe computer, the Peripheral Expan-
sion System musi be ON when lhe computer console is switched o n.
Otherwise, l h e disk drives, Conlroller Card, an d Disk Manager module
wilt
not lunction correctly. The computer console musi be turned off
and lurned back on in order to resto re normal operalion.
When you turn on the console, lhe disk drives' working lighls may
come on brielly and then go oH. Il they slay on, the disk drive cable is
probably plugged in upside down. Turn oH ali units and make su re l hai
the disk drive cable connections h ave bee n m ade proper1y.
5
IN CASE OF DIFFICUL TY
<!ID
PHP 1250
PHP 1850
Il
the disk system does noi appear t o be working proper1y, check the
following:
1.
Power - Be sure ali devices are plugged in. Then turn on the
power lo the units in the proper sequence: disk drives and Peri-
pheral Expansion Syslem first, lollowed by the console and the
monitor.
2.
Card Position- Turn the powerOFF, wait two minutes, andremo-
ve the top. Verily lhat ali cards are inserted proper1y, and lhen
replace lhe top.
3. Cable Connection - Check lor proper connection between the
console and expansion unii.
4.
Cable- Check lhat lhe proper cables are being used. Check the
cables !or loose or broken leads. Check lo see that the cables are
proper1y connected, righi si de up.lf two drive lights come on al the
same lime. you need lo add an adapter board to lhe connector.
5. Peripheral Expansion System - Check !or proper connection
between the console and expansion unii.
6. Home Computer- Check lo see t hai the Home Computerworks
proper1y with ali accessori es disconnected.
7.
Il
none olthe above procedures correcls lhe difficulty, consull ·lf
You H ave Questions orNeed Assislance• or see l h e ·Maintenance
and Service lnlormalion• section of the User's Reference Guide.
CARING FOR DISKETIES
1. Handle lhe diskette by its protective cover.
Do
noi touch any part
of the diskette's surface; finger prints will destroy disk contents.
2. Be careful noi to bend the diskette.
3. Do not write on the diskette cover with a bali point pen or pencil;
only use a lelt tip pen.
4. Do no t scratch the surface of the diskette, any scratch, even il too
small to be seen, may destroy ali the information on a number of
sectors. This usually causes information to be lostfrom most ofthe
liles on the diskette.
5. Do noi expose diskettes lo magnetic fields or excessive heat or
col d.
6. Do noi piace !ape of any kind (masking or other) on the surface of a
diskette.
7. Do noi remove a diskette !rom a drive il the drive light is on.
IF YOU HAVE QUESTlONS OR NEED ASSISSANCE
Il you have questions concerning disk system repair or peripheral,
accessory, or software purchase, please cali your RETAILER.
Because of the number of suggestions which come to Texas lnslru-
ments !rom many sources containing both new and old ideas, Texas
lnstruments will consider such suggestions only il they are freely
given to Texas lnstruments.lt is lhe policyofTexas lnstruments to refu-
se to receive any suggestions in confidence. Therefore, il you wish to
share your suggestions with Texas lnstruments, or if you wish us lo
review any BASIC language program which you h ave developed, piea-
se include lhe lollowing stalemenl in your letter:
Ali ol the information forwarded herewith is presented lo Texas lnstru-
menls on a nonconfidenlial, nonobligatory basis; no relalionship,
confidential or olherwise, expressed or implied, is established with
Texas lnstruments by this presentation. Texas lnstruments may use,
copyright, distribute, publish, reproduce, or dispose of the informa-
tion in any way without compensation lo me.•