Radio Shack TRS-80 Model 16B User manual

eTRS-80®
Model 16B Built-in Hard Disk
SYSTEM MANUAL
e
CUSTOM MANUFACTURED IN U.S.A. BY RADIO SHACK, ADIVISION OF TANDY CORPORATION

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TERMS 'ND CGNDllIO" 0' SALE '" L1W'" OF "010 SHACK COMPUTER EOJIPME" ""
SOFTW~" PU"'H"," FRO" A IADIO SIV\C, CO',lPANY-OWNEO 'O,,"ITFR com,. R'''.IL STO"
0" "0" ~ AADID SH'CK "AN'H"" OR D""" I<T "6 ,\l~Hag,/[u LO'CA-IDN
LIMITED WARRANTY
I. tUSTIlM'R "'L1GA"~"S
'. CUSTOMEH '""''''' f'.11 ,,,,,,,I,iIi" ,~iIt 'hIS "',' &k" "mp"' h' 1w,,,, ,"re""d I"" "",,m,ot , "0""' """ ,I "'d"
,""k "f.-,re 'nclU'ec ·.,th "" Eq""m"", 01 ",,"'" '''''''''''1 :t" SlI'''''' ""M' 'h, """""0"' e",,'~ "'p,",,, '"'
,",,"ility, ,no ","" "q",,"IT'ok ,f C·JST1MER
o CUSTO" E' .""m" fu, '""nslO'.! 'or '''' '"''' ,L ',., ,-,d "f~"'",,'5 of -h. ,O"r"ln, ,,,,,',,nm,,,l '" "hiM '" E"i,rrent "d So'l''''"
'" In '",lior, and lOr IS Ins"",L ".,
II. MOlD 'H"" L1MITEO WOJl~AIlTIES AHO C,"","ON" OF SALE
~ For , W" " ,",,~ '-90! ,"",J"d,;, I,,~ "" ,~" " 'J~ •. "'" Sh"" ,j" ""me~. re",',," "po, P"'''''' of·,h. E,,,,me~ .. R~D·O
s"-'" w"",rrts to t~, ,,,gin" eJST' M" lh" th' F,,,,,n,,, an, the moe ," ml pon "hI'" t" &J""'''' ,sto'" " 'tOO 'ton. m,,,"'"'' ""'
defe-::ts 'HIS WARR'NT'" ONlY ,oPll8Ir£1LE T'j 'URC",eEO OF R'D'D SH'OK FQUIPMENT ~y lHE ORIG'N'·_ CII"OM,R F~O"
RAD,O SHAC< CQWpANY-OWNED GO'-'PU"lk ",NrER' '''''l STO"ES '.NJ FR~" RAD,e '"-'OK FR'NCH'SEES A~D D,ALE,S At IlS
A, THal'IED ~aCA"8N. r" · .. ·-"nl,' i' 'i' j ill~' E"iPITm', "''' or "h"'" n" "'" OD""'d. or ilTtt' EOHM"I '" 80ft.·,,, n" \"0
so",,," " 'mp"p" ,., ,,' """,, ".. If , m"u"cu, II,g ." "" I, " "",'", duri" ,h. _, . "''''nL, ,,,,,,. ,", dele',," E,", pmen'
",,,' l><. rBiume<! to , '-,d" S,," ~'MO"L" G"',, ,, R,'" ,":k '<ta,1 <10'" plt",o""" R.,,, Oh,,, I""h"" or ',a1" ""k 'J.,','
'or re,,". ''OJ w"' ,cap, 0"'"'''' ""ne" or lea'faG"""'ot. Th' "";,,,, cUSTOMER'S "" ." ,,""','" reTI", '" ,", "e'tol
,"""" .. ,,,lie<! "the oorrW"n ,I co, """ by "p' ,. ""'_"10"', ""Iu,d of ", W'"", """ "' RADI" S~ACK Sc'"",, '''d ,,',
"''''"'5. "-'0'0 S~ACK ,,, 10 '""'d'"'''' 10 rep"," or ",,,ir '-'P'nd'DIe '"n
, l~DIO SHACK If'k,""" .... '""~" 10 ", ,J.",gn .. "p", ~'. """",. ",,·",."'I~' 10' use 0' tho Sd'L"'.~ "",pt" ''''i''d io thi'
P'"G''''' Sr·h"_,, ",:ense' [,r on '.,g IS' ""'", """':'" ""~,,iv. n. Ol1gll1' CUSTO"", ""","" ",me<!y, In to, ""','L ,,1,
&J1M"
TIanul,~uti,g "'"t ,", ~"''' """,emert ,'''''"'"110, f3[': "'''d''d." olt", "" " "" RCO" 'h<ok ,,'''' do.~,~,,"
reo","" u"n "''''>0 "r tho S'~"'re h de!EeL'" S,,,",,,,, ,'''" b' ,"tcm,' to • R"" S~," C,m~·", c.""", ' R"" Slack rete.!1 "",
p'rl',''''' "'J R" I, sod fru:hi'eo ot "" " Sh<ok d"',, ""., '''i," 'h, "." "cun "nt
C F,,"pt,, "ov,d,d hereIn r; CotO""'". "'"'- ''''''h "e, ""er ",thor oer",,, ""ho"e<!" 'ilB ''''' .. 'rtanti" ",")' ",,,., :; om f
01 RAD,O '"'.OK
o EX"F'T AS "OI"JEO ~ERE'N. ,Au'O 'HAC' WAKOS '0 "o",SS W.\RR~' liES. AND AN' 'M". 'Q WARRA~lY 0, '''''H~'TA''L1-'
0" FlnESS FOR A "Rl leJ·_", 'URPOSE IS U~'IlED " ITS DU","ON ra mE DUAA'18N OF THE 'NH"m _'MITW WARRA~ TIES S[l
FURTH HE",,"
E'orr, """ do not ,1I0w Iiml~L",,,, '" ho" '" '" Im"'" ,'"rr.,~ ·,m, '" ,,, ,bov. "m'"lon((, m" not 'M' ,,, 'JST8~FR
'I' UMrrA"~" ~F UIJIILITY
AEX"'T AS PRov,nED HE"EIN, RIr.U·O 'HACK SHAle HM' NO 1I.'B'UlY OR R,W(JNS"'L1lY '0 CUSTO"ER a~ A~' O-HER PER'ON
OR ENTllY W,TH ""PE'- TO 'NY L1"'lIlY. L80S OR O"-'-"GE CAU'''' 0'''' [;;,0 TO ~E CAU"D D'R,orLY OR 'NDIRECTLY 3Y
,EOUIP"'"1" OR "SGFT'N~RE SOLD ""'ED. LICE"'" OR FURN'SHED BY R'J;O SHACK, '"', 'In'NG, BUT NOT U'J'Eu 10, ".,
INTFRRUPTION OF SERVIC>, LUSS OF ""'''SS Q' I,NrG'PATORY PHOF-rS"' CO"FQUE~T1AL ~A"AGES RESULT'NG FRO" TH,
USE OR 8PlfLA, fUN "F T" "O'.lI"'-',"T' on 'SOFT\\ARt """ EVENT S"-,L' RADIO SHACK" LIABLE FOR lOS, OF PROFTS. OR
ANV INDIRECT, 'PFC'A', ~R CONS[OUENfiAL D'MAG" 'RIO"G aliT OF A~Y ~HEACH OF THIS WARRANTV 8R I·, .,"' '''"",R
AR''''G OUT OF on CQN'I[ClEo W'"H THE SAL F, '''SF. L1CENSl, us, u, ""01'."m USE OF T~E "EO",,",,"T" 0' "SOFTWAeF'
ND"'WHSTANOING T~E ABOVE UMIlAl'ONS AW WARR'WIFS R~O'O SfLACK'S LIABILITY HFRFU'OER FOR ~A"AGtS INCL'RRED BY
CUSTO"m 0, O'~'"S SHALL NOT EXCFF" THE ~MOU~T P~'D UY 'USTO"" ~" '~E PARTI~UL-," EOU'PMENT" 0' ' S,]FfI'IA"E"
IWOLVED
" RAD'O. ,H'CK ,h,II'ot be i"" tar ,n, d"""" """ 0, j"3\' io "'i,,rlng or '","',hl"O E''''TIen' end,'" Soltv,'""
C No ,enon "'''9 ,,' " an, ""m" b~"h ,I thIS W,'"n~' or L"""d·,,, ,.,;" chiS W"r"", ma, b. ",,,,hF m,,,, -han -,,,, f2! ,',""
""', 'h" "_,,," ,f ,,:too h" ,,,rue<! or more 'h", ,.", ':'1 """ '''er ,~, "te ot ,,, R,'ro Shoe' sa,,, ,,,,me,, lOrt1O Equpn,'Ii"
Softw,re, "l1i",.,,,, tit" dCO'"
[> S,~, """ "'''" ,110" 'h, IiTIITI" or '" "i" ot I",,,,,,, " """"""';' "m,o". 10 'M "," lim'" :;,:s:' "'" usio,,\, m"
It"~ '''''' to ;USTO"m
Ii. Mo,~ "'''C' SOFTW"RE L1e'OSE
RADI~ SHAC' l"n~ 11 CUSTO"" ,non-mlus,,", P" "' ""n" '" '"" .. , RADIO SHACK SOl""" "" ,,, "~,,",,. '",i'~ 10 '10 ""d','I,,"
~''',',,"'
A ,,,.pt " ,the·.i" prol"eo In Lh S,t"·,,, """", "'Ii"'" CO",'II," '''''' 'h,II ."" " '''' So"",,,,,
B II,,, ''''" ~,", '" ","'h"'h toe s,t.,,,, 'He,,,"" ': ",\Set, ,,,,,,,, di""" ,,,tore' '"OM: ,"'" ·"1",,, to CUSTO" [H, bU' not ,;", Ii'
'"" Sot,,,,,,
CUSTOMER .TI'y use "'".". 'I' '" h", com,,",, an" ""'''' ,roL ,,,,,,,,,. "10"," ""' (,r If.',' ",,,,,,,,, I' 'h, S,t","" p"rr'~ "",
'enct,,,
o CUSTOME" ,~,II ,0' 'J". ""',, ~a"""""re,,, ",roduCE cop',,, C1 SOl',,,,," ","oJ lor 'J" or ,no comp""', '"'" ,,,,,l1icalll
pro","" 'OS &In.''' """,,. C"tomer·s "P""'~ Jroh,";'", '"m' """m~ m, th' SO;, ..".
, CUSTOME" I, ,,"ni"'; to m,ke "0 'n "pi" of h' Sot"·,,. "" for b"<L~ at ,"h", pUlP"" or i' 'dO',", """" ,~ "quire-:! io
,~, op,,,,,,n 0' '" romp"'" •• 1h 'h' Sot"", ," only to 'h' ""nLt,,. ,,",,"~ ,110\1' -' oaek,,, mpy" b. m'de. H""O\Bt. ,,,
'kSDOS SO"""" CUSTGME" " P,""itte:I to ma<' , ""!oJ "'ml><' O' add""'" roOios 'or CUSTO"ER'S own use
F CUSTOMER m" ""II ",'''rlbLte u","dilied mpl",' toe &J"",,,,, ~r,,"" 'USTO"'R '" purcha,e<! 0"' "Pi 'Ii h' S'~"'aI' to, ,"en
ons sold or ""","",. TO. pro, '''"' of "" So",,',re L"n" "'" a", l. ,,,Ii,,,·, to '"'' P"'" """''''' "'"" "'h, So"",,-, rIO'"~
C",T"~ER
G ""Piri,h' not',", 'hoi b' '<ta'nod on a' mpl", oft" So"",'''
~" APPLICM'L1TY ~F WAR",,"TY
~ Th' terms and ,,,,,,,,,,, ""hi' W,_,~"" ai, ,ppli"bl. " """ee, ".DlO '"'CK ", CUSTOMER" 'iih", ",, 0' th' [qulpmcoJ .,d,'oJ
SOFL·.,,,, l',,""" " CUSTOMER or " , '''''''''100 '."',,">. "DlO 'HACK ee', " ron"", '""' '""m'nt " , "'''d 1''''1' '" "'''' "
CUSTOMER,
B The 11m·""", or ,,,,i1" '"" W""'"W ,ro"'ions h'reio """ 100"" Ih' o"e1' of ,~D'O SHItG' 'h, oct1O[, ow,,, ",",'d ,,,,,,",,' toe
""",re an, '·w menulaetJrer 01 '" EqLipm"", ~,'d h, "'DIG S~~8K
~I STATE LAW H'G"~
,'~ ,"mot", ,'""to; h,,," oi" 'he '~il"l CU,~""" 'poe'"~ ,,,, "'hts. ,nc co, ",I!;", C%TO"ER m"1 "'" o'h" "0"" "'h 'h ,"w
f"n ,late to stat,

The FCC wan\$ you 10 kn<>W • '
Worn ng: This 00"1",,,",-[ gene'otcs "'d .,',j ce" ",oj ele
radio ire'l"cnc'1 ",'erg,. and if not nC>!o I~d 0,,,1 Lisee -n
"'k! accordonc0 w:'h Ihe h:'ue: ons eranLl"', l'"\' Co'J,e
intwl~r""ce 10 moiG C""'""J"icalions. It ho' he"'" ',,,,,.,,,
and res "ee" toune to c0",pl)' wiltl :"e ,'mi', iO' 0 Cia" A
some"t;"') "evice p"rsuon' ,,, 3"",,,'.'1 J"I Part'5 _of ,CC
R'Jles. whi',h Are ,'"signed to pro'. "" '"""-'00 e1"'0
le,-,iQn again," ,,,er, "I~·terercc '""en "P""I~c i'- "
c-0m,y'"'c-i," "nVTOn",on'. Ope,di0r- 01 tris oq .. irC1en' ,-"
[cs;OonUal "rea, likel'I'0 Gause ·"lerler8nce i' \01 ell CO,""
the Uffir al h Sown expense '0'1,1 ~e re~u reo to take wea'_
ever m~aSLr"S "'a)' l'" requiroo to oo'reollhe intertcrcocc
TRS·XENIX Operating Sj'$1em:
Copyright 1982 Mic",..,II,
All Rights R ..... rved. llcenoed!<l Tandy Corpor.llon,
TRSOOS 2,Ob Oper.tlng Syll1em:
Copyright
19811 Tandy CO,porotion.
All Rights R ..... rved.
TRSOOS-II Oper.ling Syatem:
Copyright 1982 Tandy Corporation.
All RlgMa Reser.od.
BASIC Software:
Copyright
19BO Mlcro.oII.
All Right. R ....... d.
L1c.nsed to TondY Corporation
TRs-&iI 15--Meg Buill_In Hard DISk Sys1em _Road Mo
Firs! Manu."
Copyrlghl198J Tandy Corpor.tlon,
All RighI. Ro •• rved,
Rt'fJr'Oductior or
,,'c, ",I",-ou' express wri'W r,e,o-,,,.o,,
-'om
landy Corpcratio,' 'Or or,), porticn of 'l1i,' en"n"8 ,
pronNe~. Wei ereosorabl" efiorlS I,a-,e been 'a,on r, '11.
pmoaraliu" 01 'h' marcol '''' aSSur" ito accu'acy. Tandy
(orpo-a'ior 88$J'ne, no I,ability '."ul:·ng I'um any error>
or omissioo' ·n 1119 manual, or fm'11 tho "S" 0'· '.he lei,,,,,,,,,
tio" obt.i"ea h","ir,
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INTRODUCTION
About Your System
Congrafu'a:,ons 011 your purchase of the TRS-80" i5-Meg Buil:-in
Hard Disk System This <9 a computer system With a buil-in rra5S
storage device You 'I' find it to be ava:uable tool which gives you
more information storage and faster dala retrieval Hlan ever before
with aTRS-80 System And with Radio Shack's
larlle selection 01
oeripherals you Ca'l exparld your sys:err to include printers a
secortd hard dis~ graphics oplions, fwd more,
The Hard D,s\( System soeclal features i'le ude
•Maximum storage c8.oacity of 15 megabytes (per drivel
• 5-Mbi~5/seGond data transfe' rate wilich is at least 10 times
fasler 1'18n floppy diske:les,
•Environmentally sealed head and disk chamber for safer data
storage and longer disk life
•
An enhanced floppy diskette data s:orage format ·.hat lets you
store more information
on an 8" diskette than ever betore
About This Manual
This manual cO'ltains the information you reed to GAf started If
explains fhe various oarts of your syolem, "Ie different :ypes of
disks, and how to 'nsta Iyour sys'em
It also shows 110W to operate
ti'e System, load ap'ogram, and use some of the more halpful
commands, In addition,
it also exp'ains some lerms you roeed to
know
Since this
is a'getting-star:ed" manual, it does not describA all the
optional featLrcs availaolf! with
eaCh command For comp'e:e
information
on each command, refer to the programmirg manuals,
Notational Conventions
Tne tollowing co~ve~tions afe used to show syntax ill 'his manual
CAPITALS
Any words or charac'ers w'1iCh are uopercase must be typed in
exactly as they appear,
lowercase Italics
Fields shown in ower case ,ta ics are variable intormation :hat you
must substitute ava;ue for,
lXEYBOARD'
Any word or characler conla,ned within abox represents a
keyboard key to
bA pressed
Ellipses indicale that a fie denlry rnay be re'Jeated,
filespec
Afield shown as afilespec indicates astandard TRSDOS file
specification of the torm: ,Ii,'enameiext.password,'d(disk
name) Note
thai with the Built-in Hard Disk System, d(Drive) can be any
number between 0-7.
punctuation
Punctuation other than ellipses must be entered as shown
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delimiters •
Commands must be sepwaled from their operands by one or
more b'ank spaces Multipe op€(ands, where allowed. may oe
separated from each
o~her by acomma, acomma followed by orle
or more blanks, or by one or more blanks. Blanks and commas
may not appear within
an oDe rand
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TABLE OF CONTENTS
4/ Hard Disk Sys~em PreparationiTRS-XE .. \JIX 21
5/ Hacd Disk Systenl Prepsralion,TRSDOS-11 , ' 23
Preparing Your Primary Hard Disk " 23
Preparil'g You' Secondary Hard Dicik" 24
Preparing TRSDOS Aoplication Programs, 26
Copying TRSDOS-II Programs on:o aHard Qisk.
,26
Creating aGackur Liorary 26
RUl'niflg TRSDOS-II Programs iJrder Hard Oisk Ccr,lrol" 26
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Section II Installation and Power Up
'" Il's'alling your Buill-;n rlard Disk Sys~em
Your Equipment
Installing Your Sys,em
Instal;ir,g Peripheral [qLipmenl
2/ AboLt Disks and Programs,
Types of Disk;
Disk Format and hies"
Ooerating Systems and A;JplicatiQ~ Progra'lls
3.: Power-Up"'Power-Down
Powering Up
:ne System
Powenng Dow!'
E'lor Messages"
Section III Hard Disk Control
Section
1111 Floppy Diskette Preparation
6/ Backing Uo TRSDOS-II ar'ld TRSDOS 200,
Backing Up Yo~r TRSDOS-II Systef'ls Diskel~e,
Backing lip Your Thinline TRSDOS 2,0b Diskette,
Tips
on S;J.feguarding Dala"
7/ Using T9SDOS Programs
Prerari~g TRSDOS Programs
Removing and Swapping Diskel1es
Forma~ling Diskettes"
a/ Sample Sessiol1
5
6
9
10
'3
13
15
10
'" 17
17
20
" 20
"
" 27
28
30
31
31
33
",33
35
Section IVI Maintenance and Appendices
9/ Maintenance 37
Care of Floppy Diske'les "" 37
Floppy Diskette Drive Maintenance, 38
Secondary Hard Disk Drive Main~enance 38
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Appendices
A / Problems and Error Messages
B/The BACKUP and SAVE/RESTORE UtiHies ,
C / Graphics Codes
0/ Specifications ,_
E / Quick Reference Chart,
F/Keyboard COde
Map
39
47
59
60
67
68
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SECTION 1/
INSTALLATION
AND POWER-UP

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CHAPTER 1: INSTALLING YOUR
BUILT-IN HARD DISK SYSTEM
This chapter shows you how to install your Built-in Hard Disk
System.
Built-in Hard Disk System Console and Keyboard.
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Your Equipment •.
Carefully unpack the Built-in Hard Disk system and make sure you
have the following items:
Display
Console
Keyboard
Power Cord
You should also have these programming manuals:
•TRS-XENIX Operations Guide
•TRSOOS-I/ Reference Manual (includes addendum)
•BASIC Reference Manual
On all hard disk units, flaws in the media are identified before the •
disk drives are delivered to you. Attached to the inside the access
panel
on the back of your display console or the bottom of your
Secondary Hard Disk Unit (if you have one)
is aDISK FLAW
RECORD which specifies the errors
on your particular unit. Do not
throw this map away!
You may need to refer to it when formatting
the disk and Radio Shack service technicians may need to refer to
it if your drive ever needs servicing.
At the front of your manuals, you'll find these floppy diskettes:
•TRS-XENIX
Systems Diskettes (3)
•TRSDOS-II
Systems Diskette
with BASIC Interpreter
•Thinline TRSDOS 2.0b
Diskette with BASIC
Interpreter
(Chapter 2explains how to prepare diskettes for information
storage. Diskettes must be handled carefully, so read Chapter 2
before you use your diskettes.)
Note: Your system may also include
an optional secondary
stand-alone hard disk drive unit (Drive 5) and/or afloppy diskette
expansion unit with up to two drives (Drives 2and
3). These •
units are optional extras.
Save the packing materials
in case you need to transport your
system.
6

•About Your Equipment
Power Light Drive 4Drive 0
Reset Button -Repeats the power-up sequence.
Power Light -Lighted when the system's power is on. Never
move the unit while
lit.
Drive Light -Never remove adiskette when the drive light is on.
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Display
Console
Reset Button Keyboard
Drive
Light
Drive
Latch
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Power
Brightness
Contrast
7

Function Keys •
8
(CAPS) -When the (CAPS) light is on, (CAPS) sends only capital-letter
codes for the alphabet keys.
It does not affect other keys. Press
(CAPS) once to turn the caps-only mode off ar on.
(SHIFT), (LOCK) -Lets you input capital letters and shift punctuation
symbols. Hold down
(SHIFT) while pressing the desired key or
press the
(LOCK) once (the red light comes on). When the (LOCK)
light is on, only shifted characters are output. To release (LOCK),
press (SHIFT).
Numeric Keypad -These keys are not affected by (SHIFT), (LOCK),
ar (CAPS).
(RPT) -Repeats acharacter continuously when held down at the •
same time
as another key.
To determine the uses of other keys, see your program manual.
Optional Equipment
If you have peripheral equipment, such as an optional stand-alone
secondary hard disk or printer, follow the instructions
in "Installing
Peripheral Equipment" and the manual(s) supplied with the
equipment. Visit your Radio Shack Computer Center
to learn about
the other equipment you can use with your Built-in Hard Disk
System.
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Installing Your System
Improperly Connecting or grounding the System exposes you to
the danger of electrical shock.
It also endangers your System and
data. Follow these installation instructions carefully.
1. Place your Built-in Hard Disk System near agrounded, 120
VAC, 3-prong outlet that does not power heavy machinery,
copiers, or office machines with defective switches. (or use a
grounded power strip such as Radio Shack's Plug-In Power
Strip.)
2. Make sure all equipment is turned off.
3. Connect the keyboard's built-in cable to the display console.
4. Plug the power cord into the back of the display console.
5. Plug the power cord directly into the outlet or grounded power
strip specified
in Step 1.
9

Installing Peripheral Equipment
You can use other Radio Shack equipment (such as aprinter, a
secondary hard disk or afloppy diskette expansion unit) with your
Built-in Hard Disk System.
To install such equipment, refer to the
following instructions and the manual(s) supplied with the
equipment.
Externally Connected Peripheral Equipment
•
Serial If0
Connectors
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External Peripheral Equipment Connections.
Parallel Printer Connector -Used to connect Radio Shack
parallel printers. Make sure the printer cable exits the bottom of
the connector.
Serial I/O Connector -Used to install serial equipment such as
serial line printers, modems, and data terminals. When connecting
aDB-25 type cable, fit the cable connector
to your Built-in Hard
Disk System's connector.
Internally Connected Peripheral Equipment
The floppy diskette and hard disk expansion connectors are
behind the Input/Output Access Panel
on the back of your Built-in
Hard Disk System.
Floppy Diskette Expansion Connector -Used to add floppy
diskette storage devices, such
as the Thinline Disk Bay.
Instructions for connecting the cable are on the next page.
Hard Disk Expansion Connectors -Used to add an optional
secondary hard disk. Your system has these connectors only if the
system has abuilt-in hard disk. Instructions for connecting the
cables are
on the next page.
The illustration on the next page shows the floppy and hard disk
expansion connectors with cables attached.
10
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H.m Di'k
E.p,n,;on Co"n""'"
.lra;" RoH ..
B... cke1
-'.,-'
r
A...,,, P,,,,,I
Flo",", D;,k""
Exp,n,ioo Co"n"',,
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1Remove the access panel by loosening the tbumbscrews.
2Attach 'he cables thai are included wittl yOLr expansion unit
to the appropriate connector. Connect tl19 34-pin Secondary
Hard Disk Exoansion Cable Connector to 'he 34-pin snap-II'
connector on the edge of the PC. board, Also conrwctll18
20·pin Data Cable Connector to the 20-pin snap-ill connector
on the edge of 'he P,C, board
If you are conll8cting aFloopy Disk Expansion Uilit attach the
connector on one end of ,he cable to the 50-p;n connector on
the chassis Connect the other end at the cable 10 the
E~pansioll Unit
Position all the
B~ill-in Hard Disk internal connectors so tl'at
the cables exit from 'he bolton"""
3, Remove the strain relief orackets frorr the access panel. Run
the cables downward through the "strain reliefs" nearest fo
the cables. leaving abOl.t 8incJl€s of cable between the strain
relief and the computer,
4Replace the strain relief brackets and
rU1 the cab'as through
the notch
,n the compufer base
5Replace the access panel and tighten the thumbscrews
Also, the Hard Disk Drives in your System must always contain a
L'lne Terminator. Check With your RadiO S'lack COll'puter Center
for defails,
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CHAPTER 2: ABOUT DISKS AND
PROGRAMS
Corr,puters can stere inforrnac or in 1'·,vo ways:
•Ternporari y, In rTl&rTlory (tL.rnilg :le compute' off erases
mcmo
c
'y',1
• Permarentl/ in a sto,cage oevice
Disks die Ole of t.he l;est s:orage devices available because at ~he
way 11'9 sysle'n elm orDani?p 2nd index il1form9-,on on IrelD
Types of Disks
Yau eBui 1-1'1 HaeQ Dis" System call LSO two :ypes of disks
• F opay dis..;ettes _Your 3Jilt-ir Hard Jok System has one
buil:-in fbopy drive Drive \)1 ald other periphe'al floopy
diske:te d'ves C81' bp. added
• Hard disks _ vour Built-in Ha'd Disk System ras onc b'Ji I-in
rard disK dr:ve (Drive t.) and anc:'ler oeripherai secondary
t'arcl disk drive can oe Boded (Driv'9 5)
Floppy Diskettes
For)oy dis<elle~ are corwer'ienl and inexpensive The lerrr
"floppy' "lears ~1e disKette Dercc if misha1dled Care oj floppy
dlskeJes 'IS dlsc'Jssec Idler '''I Ih'lS r"lam,ClI,
I ~ere are lwo IYlles 01 Iloopy disketles YOI, oa1 use will' y'llJr
BLilt-ir Hard D sk S\'stom'
•S'ngle sided d'skettes can store aroJrld 500 000 bytes 01
if'le'rllatillrl,
•Ocub,:e-sidecf diske!les can s~ore lwice as mUCl1 inforrllalior
beCfl,JSe 1hey use both sides
13

14
Label
Sector Hole
Do
Not Touch
Label -After placing alabel on adiskette, write on it with a
felt-tip pen only. (Currently, Radio Shack diskettes are labeled as
single- or double-sided.
If adiskette is not labeled, it is an older,
single-sided diskette.)
Write-Protect Tab - To change information on adiskette, you
must write enable the diskette.
Do this by covering the
write-protect notch with one of the gummed-foil tabs provided.
You
cannot change adiskette's information if the write-protect notch is
uncovered.
Sector Hole - It is off-center on double-sided diskettes.
Keep diskettes away from dirt, pressure, magnetic fields, and
excessive heat and sunlight.
Do not bend them. (See Chapter 9,
"Maintenance.")
Hard Disks
Unlike floppy diskettes, hard
disks cannot be removed from
their drives. Hard disks are
sturdier, faster, and store more
bytes of information.
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