LNW Research LNDoubler 5/8 User manual

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FE1ATURES
5- and 8-inch* disk drives
Single- &double-density
Any size and density in any mix
Read Model I, II* and III disks
5- or 8-inch* system disk
Single &double sided disk drives
DOS+ 3.3.9 included, with Disk
BASIC.
6month warranty
Up to 3.75 megabytes online
Easy installation -plug-in &run
Analog phase lock loop data
separation
Precision write precompensation
Regulated power supply
Guaranteed operation at 4MHz
All contacts gold plated
Solder masked &silk screened
Runs under DOS+ 3.3.9, TRSDOS
2.3, NEWDOS 2.1, NEWDOS/80
1.0, LDOS, NEWDOS/80 2.0 r
and ULTRADOS
Reads 40- and 35-track disks on
80-track drives
FD1791 controller +your FD1771
Fits Model Iexpansion interfaces
Fits LNW expansion interfaces
Track configurations to 80-tracks
5inch disk storage increased to:
161,280 bytes -35-track SS/DD
322,560 bytes -35-track DS/DD
184,320 bytes -40-track SS/DD
368,640 bytes -40-track DS/DD
368,640 bytes -80-track SS/DD
737,280 bytes -80-track DS/DD
8inch disk storage increased to:
591,360 bytes -77 -track SS/DD
1,182,720 bytes -77-track DS/DD
SS: single-sided DS: double-sided
SD: single-density DD: double-density
COMPLETE -The LNDoubler 5/8,
switches your Model Ior LNW-80
into the most versatile computer you
can own. The LNDoubler's switch
allows you to boot from 5- or 8-inch
system disks, and it's accessible from
outside the interface. The LNDoubler
5/8 comes with adouble-density disk
operating system (DOS+ 3.3.9),
complete with BASIC and utility
programs . . . ready to run your
software NOW!
VT?R<JATTTT? WTio+Vior'unu want
single-sided, double-sided, single- or
double-density, 5- or 8-inch operation,
complete versatility is here today!
Any combination of 5- and 8-inch disk
storage is possible with the
LNDoubler 5/8. Each of your present
40-track, single-sided 5-inch drives
will store up to 184,320 bytes
(formatted storage) -that's an 80 %
increase in storage capacity for only
half the cost of just one disk drive.
With three 8-inch double-density,
double-sided drives your Model Iwill
have 3.75 Megabytes of online storage
-that's more storage than aModel II
or Model III! '$
ADVANCED -The LNDoubler 5/8
is the most technically advanced,
tested and reliable double-density
board you can buy. The LNDoubler
5/8 has more features, more options
and more software support than any
other product of its kind.
EASY TO INSTALL -The
LNDoubler 5/8 is easy to install.
There are no traces to cut, no wiring
to do, just ascrewdriver and afew
minutes of your time is all that is
required. The instructions are fully
illustrated for all interfaces. In
minutes you will be 'up-and-running',
and enjoying your computer as never
before.
COMPARE -Compare features,
compare quality, compare value, and
make the SWITCH today!
Immediate delivery from stock -at
your dealer NOW for only
$199.95
without DOS
$219.95
with DOS
DEALERS -You too can ^\^$%h~-
make 'the Switch. ... "'^^•'C." (\t *&;
LNWResearch Corn
2620 WALNUT Tustin, CA. 92680 [phone] [phone] -:\ ;'.«'' .''
*8'* drive operation requires special cable, 8" double-density requires 3.55MHz CPU speed-up modification or LNW-80 4MHz computer. **"' TRS-80 is atrademark of Tandy Corporation.

LNDOUBLER 5/8
The ultimate in double density adapter units
USER MANUAL VERSION 1.0
08/29/81
COPYRIGHT 1981 LNW RESEARCH CORPORATION

CONTENTS
MEDIA AND DISK DRIVE REQUIREMENTS ........2
REQUIRED ACCESORIES. .........................
3
TESTING YOUR INTERFACE ....................... 4
INSTALLATION INTRUCTIONS .
.
................... 5
RADIO SHACK EXPANSION INTERFACE ........... 6
OLDER VERSION OF EXPANSION INTERFACE ... 7
NEWER VERSION OF EXPANSION INTERFACE .. 1.1
LNW RESEARCH SYSTEM EXPANSION ............ 15
ASSEMBLED AND TESTED. ................. 1
5
KIT FORM. .......................... ...18
POWERING UP FOR THE FIRST TIME .............. 19
CONNECTING EIGHT INCH DISK DRIVES ........... 20
XOLj \J i\ xwX7 \J it Lj Ia /*\ XXKJ L^0©©©©©oo©o©o©©©©©o©©oo©o©^-0
FD179X-02 FLOPPY CONTROLLER DATA. ........... 28
WD1691 FLOPPY SUPPORT LOGIC DATA. ........... 44
FD179X APPLICATION NOTES. ................... 47
AT TCNMFNT R"}
ACCESSORY ORDERING INFORMATION .............. 54
LIMITED WARRANTY 55
ACKNOWLEDGEMENTS ............................ 56
APPENDIX 1.0 USING NEWDOS80 2.............. 57

The LNDOUBLER 5/8 switches your TRS80* MODEL Ior LNW80
computer into the most versatile computer you can own.Whether
you want single sided, double sided, single or double density,
5
or 8inch disk operation, any combination of disk storage is
possible with the LNDOUBLER 5/8* Each of your present 40 track
single sided disk drives will store up to 184,320 bytes
(formatted)-thats an 80% increase! The LNDOUBLER 5/8 even
allows you to BOOT from an 8" system disk with aflip of a
switch. The LNDOUBLER 5/8 is compatible with all software
available for 5" single and double density, 8" single and
double density written for the TRS80.
The LNDOUBLER 5/8 is easy to install .There are no traces to
cut, no soldering or wiring. Just unplug the floppy controller
IC (FD1771) from your interface ,install the FD1771 into the
LNDOUBLER 5/8, and just plug the LNDOUBLER 5/8 into the
interface. In just afew minutes you'll be enjoying your
computer as never before.
The LNDOUBLER 5/8 is the most technically advanced ,tested
and reliable double density board you can own.The LNDOUBLER
5/8 has more features ,more capabilities, and more software
support than any product of it's kind.
FEATURES
*RELIABLE OPERATION GUARANTEED WITH ALL 5.25" and 8" DISK
DRIVES
*SINGLE AND DOUBLE DENSITY OPERATION
*5.25" AND 8" IN ANY MIX
*READ MODEL 1,1 1, III DISKS
*5.25" AND 8" SYSTEM DISKS
*ANALOG PHASE LOCK LOOP DATA SEPARATION
*PRECISION WRITE PRECOMPENSATION
*REGULATED SUPPLY FOR VCO AND ALIGNMENT CIRCUITS
*GUARANTEED OPERATION WITH ALL TRS80 EXPANSION INTERFACE
UNITS
*ALL GOLD CONTACTS
*GUARANTEED OPERATION AT 4.0 MHZ CPU SPEED
*EASY INSTALLATION
*COMPATIBLE WITH ALL SINGLE ,DOUBLE AND 8" DRIVE SOFTWARE
*FIVE INCH DISK STORAGE INCREASED TO :
161,280 bytes- 35 track ss/dd
322,560 bytes- 35 track ds/dd
184,320 bytes- 40 track ss/dd
368,640 bytes- 40 track ds/dd
368,640 bytes- 80 track ss/dd
737,280 bytes- 80 track ds/dd
*EIGHT INCH DISK STORAGE INCREASED TO
:
335,104 bytes- 77 track ss/sd
670,208 bytes -77 track ds/sd
591,360 bytes -77 track ss/dd
1,182,720 bytes -77 track ds/dd
ssi single sided dss dual sided
sds single density dds double density
-1-

MEDIA AND DRIVE REQUIREMENTS
Since the LNDOUBLER 5/8 will work with virtually any
drive and any media, it may be tempting to use (for example)
low cost single density single sided 35 track diskettes with
80 track, double density double sided drives eOn the other hand,
experimentation to find out which diskettes work the best, may
lead to the conclusion that any diskettes will work. For this
reason we at LNW RESEARCH make the following suggestions:
l.Use double density rated disk drives* Single density
drives may work, but the proper operation in double density
cannot be guaranteed for the life of the drive*
2oUse diskettes rated according to their use
3*Check diskettes for wear periodically
4oClean and align your disk drive(s) according to the
manufacturer's recommendations,,
-2-

REQUIRED ACCESSORIES FOR 5"DOUBLE DENSITY, 8" AND
SPECIAL SOFTWARE APPLICATIONS
All existing TRS80 MOD Isingle density software will run
unmodified in SINGLE DENSITY with the LNDOUBLER 5/8 installed.
In order to use double density and 8" drive capabilities)
special software is required, in order to connect an eight
inch disk drive to your system, aspecial cable adapter
circuit board and an eight inch disk drive cable (50 cond.) is
required. Some eight inch disk drive software requires a
special "wait cable" (stk# 1097). Some eight inch disk drives
require that the "write current" line on the disk drive be
driven when using these drives in double density above track
43. In order to do this another small cable is needed. This
cable is called the "TG43 CABLE" (stk#1097) .Shugart Disk
drives DO NOT NEED THIS CABLE. Check the data sheets on your
drive to determine if your drive needs this signal.
The ^hardware/software configuration information is
summarized in the following tableland ordering information for
the various accessories is included at the rear of the manual
DOS 5.25" SD 5.25" DD 8" SD 8" DD
Dosplus 3. 2d x
Dosplus 3.38d x
Dbldos x
F.E.C. T8/0S S
LDOS 5.0 S
Omikron CP/M s
Newdos80 1.0 s
Newdos80 2.0 S
Vtos 4.0 s
NOTES:
25" DD 8" SD
S
SX(1)
SX(l,2)
SS(l f2)
S(3) X(l f2)
SS(l)
S(3)
X(l,4)
X(1 ,4)
X= non system disk
S= system or non system disk
1= requires 8" cable adapter (stk#1096) and 8" drive
cable (stk#1099)
2= requires "wait cable" (stk#1097)
3= requires Double Zap II from Software etc.
4= requires CPU speed to >3.5 mhz or LNW80 computer
SEE PAGE 21 for details concerning speed up kits

SPECIAL NOTE
BEFORE ATTEMPTING TO INSTALL THE LNDOUBLER 5/8 INTO
YOUR INTERFACE, MAKE sure THAT YOUR INTERFACE IS
FUNCTIONING PROPERLY .OPENING YOUR INTERFACE DURING
THE LIMITED 90 (180 FOR LNW INTERFACE) DAY WARRANTY
PERIOD MAY VOID YOUR WARRANTY. EXERCISE YOUR WARRANTY
RIGHTS IF NECESSARY PRIOR TO INSTALLING THE LNDOUBLER
TEST YOUR INTERFACE
To test your interface and provide a"test diskette" for
our initial power up of the LNDOUBLER 5/8, make a"backup" of a
single density DOS SYSTEM disk. DO NOT attempt to BOOT the
double density system disk (Dosplus) without the LNDOUBLER 5/8
installed. If you are not able to correctly backup asingle
density SYSTEM disk DO NOT attempt to install the LNDOUBLER
5/8. It cannot fix defective interface units! After backing up
the single density SYSTEM disk attempt to BOOT this disk. If
it boots correctly set it aside for the initial power up with
the LNDOUBLER 5/8. Proceed to INSTALLATION INSTRUCTIONS.

INSTALLATION INSTRUCTIONS
TOOLS REQUIRED^
Small slotted screwdriver
Medium phillips screwdriver
Needle nose pliers or tweezers
Large clean work space
mmmm.tM Sill
**•:..
CAUTION
THE FD1771 FLOPPY CONTROLLER IC WHICH YOU WILL
BE REQUIRED TO HANDLE DURING THE INSTALLATION
OF THE LNDOUBLER 5/8 IS SENSITIVE TO STATIC
ELECTRICITY AND CAN EASILY BE DAMAGED BY A
STATIC DISCHARGE. BREAKING THE PINS OF THE FD1771
WILL ALSO CAUSE PERMANENT DAMAGE TO THE PART
.
WE MAKE THE FOLLOWING RECOMMENDATION CONCERNING THE
HANDLING OF THE FD1771:
1. Work in an area that is NOT CARPETED
2. Do not wear clothes that will generate static
3. Have all tools close at hand before handling the
FD1771 4„ Use great care when removing and installing the
FD1771 to not bend or break the delicate pins
Installation instructions are provided for the two different
expansion interface units for the TRS80- the Tandy and the LNW
interf ace.
--:>•

TANDY INTERFACE
Disconnect the interface from the computer. Unplug the
interface from the AC power^, disconnect all cables from the
interface (printer ^RS232 ,and floppy disk retc s)Turn the
interface upside down such that the rubber feet face upward.
You will notice six (6) phill ips-head screws recessed into the
plastic bottom of the interface case. Loosen each screw
completely but don't remove them from the bottom panel.
Carefully lift the entire bottom panel away and set it
beside the interface exercising care not to lose the mounting
screws. Note that the screws are of different lengths*
IHHHHHHflflP
Refer ^to the following photographs to identify your type
of expansion interface. There are two different designs from
Tandy ,the one on the left was their original interface, hence
"OLD" and the one on the left is the newer of their designs
and we refer to it as "NEW". Proceed to instructions provided
for the type of interface which you own.

OLD EXPANSION INTERFACE
Observe the location of the floppy controller IC (the large
black IC with 40 pins marked FD1771 )located at position Z34*
Mote that the "notch" on the IC faces the center of the
circuit board.
WStfBmfflmffl&iiSiBMMMKi&'ii.
r~J:j
fBfmwwfwX.
Carefully remove the the FD1771 by
screwdriver between the FD1771 and
installed in, and pry it gently on each
following photos.
inserting the small
the socket that it is
side. Refer to the
MM
:
$Hk-
-7-

Should alead become bent as in the next photo fuse the
pair of needle nose pliers or tweezers to carefully bend the
pins back in place eDo not use excessive force or bend the
lead back and forth too many times as the leads are delicate
and can easily break.
au.
Now install
LNDOUBLER 5/8.
Use extreme care to insure that all 40
into the socket. The notch on the FD1771
outside of the LNDOUBLER 5/8.
Inspect the seating of the FD1771 in its
the LNDOUBLER 5/8 board with the notch side
you* Look between the bottom of the IC and
socket and inspect the two rows of pins of the IC. If apin is
bent, carefully remove the FD1771 and bend the lead straight
with the needle nose pliers or the tweezers. Reinstall the
FD1771 into the socket.
the FD1771 in the socket (IC10) provided on the
pins seat properly
should face the
socket by holding
of the 1771 facing
the top of the
lip**
It
1A}*& ^I!:iS£-?~''^>,
i

Prepare to install the LNDOUBLER 5/8 by inspecting the area
on the interface near the socket and observe the area for
components which might obstruct installation. Carefully
reposition any components. Remove the protective foam block on
the pins of the LNDOUBLER 5/8, Position the LNDOUBLER 5/8
above the socket and guide the pins of the LNDOUBLER 5/8 into
the socket. Refer to the following photo e
Note that there is asmall ro
which allows asupport on the e
through.
Gently press the LNDOUBLER 5/
the installation of the LNDOUBLE
pins are seated in the socket,
seat properly due to obstruction
be repositioned easily, it may
LNDOUBLER 5/8 in its socket. T
installing a40 pin dip IC so
pins and the IC socket on the ex
und hole on the LNDOUBLER 5/8
xpansion interface case to fit
lnt
i^ /Qothe socket. Now inspect
making sure that all the
fthe LNDOUBLER 5/8 will not
yacomponent which cannot
be necessary to RAISE the
scan be accomplished by
et between the LNDOUBLER 5/8
nsion interface.
-/
j|if
R5/8
ck
pa
JOG

Before closing up, note the switch on the outside corner of
the LNDOUBLER 5/8. It is accesible from the outside of the
interface, but you must make sure you know what position it is
set to before closing up the interface. SET THE SWITCH TO THE
"5" POSITION. Adetailed explanation of the operation of this
switch is included in alater section of this manual.
Now carefully position the case bottom panel over the
interface, guiding the 6screws into their 6plastic supports
on the case. Tighten the 6screws completely.,
Observe the opening in the interface that the 5/8 switch is
visible* Using some sort of label or tape, mark the outside of
the case in such away as to identify the setting of the
switch for the "5" position. Proceed to the section entitled
"POWERING UP FOR THE FIRST TIME".

NEW EXPANSION INTERFACE
Note the location of the floppy controller IC (FD1771),the
large black 40 pin IC at location Z42 sThe notch on the FD1771
should face Z41 and the connector for the Floppy disk drives*
mOP
liMlli
Carefully remove the the FD1771 by inserting the small
screwdriver between the FD1771 and the socket that it is
installed in, and pry it gently -on each side. Refer to the
following photos 9
<m

Should alead become bent as in the next photo #use the
pair of needle nose pliers or tweezers to carefully bend the
pins back in place sDo not use excessive force or bend the
lead back and forth too many times as the leads are delicate
and can easily break.
.I//
1!I\}'•'•)
mQ
Now inst
LNDOUBLER 5
Use ext
into the so
outside of
Inspect
the LNDOUBL
you. Look b
socket and
bent fcaref
with the
FD1771 into
the FD1771 in the socket (IC10) provided on the
that
the all 40
FD1771
all
/8.
reme care to insure
cket* The notch on
the LNDOUBLER 5/8.
the seating of the FD1771 in its
ER 5/8 board with the notch side
etween the bottom of the IC and
inspect the two rows of pins of
pins seat properly
should face the
socket by holding
of the 1771 facing
the top of the
the ic. If apin is
ully remove the FD1771 and bend the lead straight
needle nose pliers or the tweezers. Reinstall the
the socket.
mr
-12-

Prepare to install the LNDOUBLER 5/8 by inspecting the area
on the interface near the socket and observe the area for
components which might obstruct installation* Carefully
reposition any components. Remove the protective foam block on
the pins of the LNDOUBLER 5/8 .Position the LNDOUBLER 5/8
above the socket and guide the pins of the LNDOUBLER 5/8 into
the socket,, Refer to the following photo a
Gently press the LNDOUBLER 5/8 into the socket. Now inspect
the installation of the LNDOUBLER 5/8 making sure that all the
pins are seated in the socket. If the LNDOUBLER 5/8 will not
seat properly due to obstruction by acomponent which cannot
be repositioned easily^it may be necessary to RAISE the
LNDOUBLER 5/8 in its socket. This can be accomplished by
installing a40 pin dip IC socket between the LNDOUBLER 5/3
pins and the IC socket on the expansion interface,,
.\
)

Before closing up, note the switch on the outside corner of
the LNDOUBLER 5/8 .It is accesible from the outside of the
interface, but you must make sure you know what position it is
set to before closing up the interface. SET THE SWITCH TO THE
"5" POSITION. Adetailed explanation of the operation of this
switch is included in alater section of this manual.
Now carefully position the case bottom panel over the
interface, guiding the 6screws into their 6plastic supports
on the case. Tighten the 6screws completely.
Observe the opening in the interface that the 5/8 switch is
visible. Using some sort of label or tape, mark the outside of
the case in such away as to identify the setting of the
switch for the "5" position. Proceed to the section entitled
"POWERING UP FOR THE FIRST TIME".
-14-