Tandy Portable Disk Drive 2 User manual

TANDY
Portable Disk Drive 2
OPERATION MANUAL
Cat. No. 26-3814

gjKvK Cc^Ma (k,™*
TERMS AND CONDITIONS OF SALE AND LICENSE OF TANDY COMPUTER EQUIPMENT AND
SOFTWARE PURCHASED FROM RADIO SHACK COMPANY-OWNED COMPUTER CENTERS, RETAIL
STORES AND RADIO SHACK FRANCHISEES OR DEALERS AT THEIR AUTHORIZED LOCATIONS
LIMITED WARRANTY
I. CUSTOMER OBLIGATIONS
A. CUSTOMER assumes full responsibility that this computer hardware purchased (the "Equipment"), and any
copies of software included with the Equipment or licensed separately (the "Software") meets the specifications,
capacity, capabilities, versatility, and other requirements of CUSTOMER,
B. CUSTOMER assumes full responsibility for the condition and effectiveness of the operating environment in which
the Equipment and Software are to function, and for its installation.
II. LIMITED WARRANTIES AND CONDITIONS OF SALE
A. For aperiod of ninety (90) calendar days from the date of the Radio Shack sales document received upon
purchase of the Equipment, RADIO SHACK warrants to the original CUSTOMER that the Equipment and the
medium upon, which the Software is stored is free from manufacturing detects. This warranty ft onh/ applicable
to mwcJmms of Tandy Equipment by Hie original customer horn Radio Snack company-owno* computer
cantors, retail stores, and Radio Snack franchisees and dealers at their authorized locations. The warranty is
void if the Equipment or Software has been subjected to improper or abnormal use. If amanufacturing defect' is
discovered during the stated warranty period, the defective Equipment must be returned to aRadio Shack
Computer Center, aRadio Shack retail store, aparticipating Radio Shack franchisee or aparticipating Radio Shack
dealer for repair, along with acopy of the sales document or lease agreement. The original CUSTOMER'S sole and
exclusive remedy in the event of adefect is limited to the correction of the defect by repair, replacement, or
refund of the purchase price, at RADIO SHACK'S election and sole expense. RADIO SHACK has no obligation to
replace or repair expendable items.
B. RADIO SHACK makes no warranty as to the design, capability, capacity, or suitability for use of the Software,
except as provided in this paragraph. Software is licensed on an "AS IS" basis, without warranty. The original
CUSTOMER'S exclusive remedy, in the event of aSoftware manufacturing defect, is its repair or replacement
within thirty (30) calendar days of the date of the Radio Shack sales document received upon license of the
Software, The defective Software shall be returned to aRadio Shack Computer Center, aRadio Shack retail store,
aparticipating Radio Shack franchisee or Radio Shack dealer along with the sales document.
C. Except as provided herein no employee, agent, franchisee, dealer or other person is authorized to give any
warranties of any nature on behalf of RADIO SHACK.
D. EXCEPT AS PROVIDED HEREIN, RAOIO SHACK MAKES NO EXPRESS WARRANTIES, AND ANY IMPLIED
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE IS LIMITED IN ITS DURATION
TO THE DURATION OF THE WRITTEN UNITED WARRANTIES SET FORTH HEREIN.
E. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation(s) may not
apply to CUSTOMER.
III. LIMITATION OF LIABILITY
A. EXCEPT AS PROVIDED HEREIN, RADIO SHACK SHALL HAVE NO LIABILITY OR RESPONSIBILITY TO CUSTOMER
OR ANY OTHER PERSON OR ENTITY WITH RESPECT TO ANY LIABILITY, LOSS OR DAMAGE CAUSED OR
ALLEGED TO BE CAUSED DIRECTLY OR INDIRECTLY BY "EQUIPMENT" OR "SOFTWARE" SOLD, LEASED,
LICENSED OR FURNISHED BY RADIO SHACK, INCLUDING, BUT NOT LIMITED TO, ANY INTERRUPTION OF
SERVICE, LOSS OF BUSINESS OR ANTICIPATORY PROFITS OR CONSEQUENTIAL DAMAGES RESULTING FROM
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LIABLE FOR LOSS OF PROFITS, OR ANY INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF
ANY BREACH OF THIS WARRANTY OR IN ANY MANNER ARISING OUT OF OR CONNECTED WITH THE SALE,
LEASE, LICENSE, USE OR ANTICIPATED USE OF THE "EQUIPMENT" OR "SOFTWARE."
NOTWITHSTANDING THE ABOVE LIMITATIONS AND WARRANTIES, RADIO SHACKS LIABILITY HEREUNDER FOR
DAMAGES INCURRED BY CUSTOMER OR OTHERS SHALL NOT EXCEED THE AMOUNT PAID BY CUSTOMER FOR
THE PARTICULAR "EQUIPMENT" OR "SOFTWARE" INVOLVED.
B. RADIO SHACK shall not be liable for any damages caused by delay in delivering or furnishing Equipment and/or
Software.
C. No action arising out of any claimed breach of this Warranty or transactions under this Warranty may be brought
more than two (2) years after the cause of action has accrued or more than four (4) years after the date of the
Radio Shack sales document for the Equipment or Software, whichever first occurs.
D. Some states do not allow the limitation or exclusion of incidental or consequential damages, so the above
limitation(s) or exclusion(s) may not apply to CUSTOMER.
IV. SOFTWARE UCENSE
RADIO SHACK grants to CUSTOMER anon-exclusive, paid-up license to use the TANDY Software on one computer,
subject to the following provisions:
A. Except as otherwise provided in this Software License, applicable copyright laws shall apply to the Software.
Title to the medium on which the Software is recorded (cassette and/or diskette) or stored (ROM) is transferred to
CUSTOMER, but not title to the Software.
CU6T0MER may use Software on amultiuser or network system only if either, the Software is expressly labeled
to be for use on amultiuser or network system, or one copy of this software is purchased for each node or
terminal on which Software is to be used simultaneously.
CUSTOMER shall not use, make, manufacture, or reproduce copies of Software except for use on one computer
and as is specifically provided in this Software License. Customer is expressly prohibited from disassembling the
Software.
CUSTOMER is permitted to make additional copies of the Software only for backup or archival purposes or if
additional copies are required in the operation of one computer with the Software, but only to the extent the
Software allows abackup copy to be made. However, for TRSDOS Software, CUSTOMER is permitted to make a
limited number of additional copies for CUSTOMER'S own use,
CUSTOMER may resell or distribute unmodified copies of the Software provided CUSTOMER has purchased one
copy of the Software for each one sold or distributed. The provisions of this Software License shall also be
applicable to third parties receiving copies of the Software from CUSTOMER.
All copyright notices shall be retained on all copies of the Software.
V. APPLICABILITY OF WARRANTY
A. The terms and conditions of this Warranty are applicable as between RADIO SHACK and CUSTOMER to either a
sale of the Equipment and/or Software License to CUSTOMER or to atransaction whereby Radio Shack sells or
conveys such Equipment to athird party for lease to CUSTOMER.
B. The limitations of liability and Warranty provisions herein shall inure to the benefit of RADIO SHACK, the author,
owner and or licensor of the Software and any manufacturer of the Equipment sold by Radio Shack.
VI. STATE LAW RIGHTS
The warranties granted herein give the origins! CUSTOMER specific legal rights, and the original CUSTOMER may
have other rights which vary from state to state. 6/86
B.
C.
D.
E.
F,
G.

The FCC Wants You to Know
This equipment generates and uses radio frequency energy. If not installed and used properly,
that is in strict accordance with the manufacturer's instructions, it may cause interference to
radio and television reception.
It has been type tested and found to comply with the limits for a Class Bcomputing device
in accordance with the specifications in Subpart Jof Part 15 of FCC Rules, which are designed
to provide reasonable protection against such interference in aresidential installation.
However, there is no guarantee that interference will not occur in aparticular installation.
If this equipment does cause interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged to try to correct the in-
terference by one or more of the following measures:
•Reorient the receiving antenna
•Relocate the computer with respect to the receiver
•Move the computer away from the receiver
•Plug the computer into adifferent outlet so that computer and receiver are on different
branch circuits.
Warning
This equipment has been certified to comply with the limits for aClass Bcomputing device,
pursuant to Subpart Jof Part 15 of FCC Rules. Only peripherals (computer input/ouput
devices, terminals, printers, etc.) certified to comply with the Class Blimits may be attached to
this computer. Operation with non-certified peripherals is likely to result in interference to
radio and TV reception.
2/86
Contents
Portable Disk Drive 2Operation Manual:
Copyright 1986 Tandy Corporation
All Rights Reserved.
Reproduction or use, without express written
permission from Tandy Corporation and/or its
licensor, of any portion of this manual is pro-
hibited. While reasonable efforts have been
taken in the preparation of this manual to
assure its accuracy, Tandy Corporation assumes
no liability resulting from any errors or omis-
sions in this manual, or from the use of the
information contained herein.
Introduction j
1General Information 3
Cable Connections 4
Battery Installation 4
Optional AC Adapter 5
Auto Power Off ""!"!!! 5
Diskette 5
System Start-up 7
System Disk 7
File Management Software 8
2File Management n
Start-up 11
Configuration of File Manager 12
Disk Bank Feature 13
Commands 14
Files j4
Load 15
Save 17
Bank ,jg
Kin ..!!.!!!.!!!!!..!!. 19
Name 2
Format 21
Menu 21
3Error Messages 23
4Utilities 25
BACKUP.BA .!!.!..!..! 25
FREMEM. BA ..."""! 28
10 987654321

Contents
526-3808 Portable Disk Drive Diskette 29
Appendices 31
ASpecifications ..• 33
BSchematic Diagram 35
Introduction
The Portable Disk Drive 2interfaces to the Tandy 102, Tandy 200 or Radio
Shack Model 100 portable computer through the RS-232C port by cable. Its
compactness and light weight allow you to carry it along with your portable
computer.
The Disk Drive 2can even be powered by batteries for maximum porta-
bility. Or, you can use the optional AC adapter to operate the drive from
any standard elettrical outlet when it will be used for an extended period of
time. The power automatically shuts off after 30 minutes if the drive does
not receive input from the computer.
Using the Disk Drive 2to store your files on diskettes will give you
unlimited data storage space. Although tiny in size, the 3!
/2" diskette can
store up to 200,000 bytes of data in 2banks.
With the file management program of the utility diskette, which is provided
with the drive, files can be read and loaded from diskettes made on the
26-3808 portable disk drive. In addition to the file management program
(called FLOPPY), the utility diskette also contains adiskette backup
program (BACKUP.BA) and aprogram (FREMEM.BA) for removing the
file manager from computer memory.
Now you can utilize your portable computer to its greatest potential without
worrying about ashortage of memory space.

liWiimfi In
General Information 1
Open the package and take out the Portable Disk Drive 2. Do not throw
away the packing material or the box. These may be useful if you ever need
to transport the Portable Disk Drive 2.
The Portable Disk Drive 2package includes:
•Portable Disk Drive 2
•Utility Diskette
•Connection Cable for Portable Computer
Figure 1
®Disk In/Out Bar Press this bar to lock the disk drive into operating
position, after you insert the diskette.
LOW BATTERY Indicator ... This indicator lights when the batteries are weak.
POWER Switch Slide up this switch to turn on the power. Slide
down to turn off the power.
©Access Indicator This indicator lights when the drive is accessing
the diskette.
EJECT Button Press this button to release the disk in/out bar and
remove the diskette.
Cable Connects the Disk Drive to your computer.
3

General Information
Cable Connections
Connect the computer and the disk drive with the connection cable as
shown in Figure 2. The larger connector plugs into the RS-232C port on the
rear panel of the computer. The smaller connector plugs into the RS-232C
port on the rear panel of the disk drive. Both plugs are asymmetrical. If a
plug cannot be inserted easily, don't force it. Just turn the plug over and try
again. Be sure that the cable connections are secure. Loose connections will
cause problems because data is transferred through this cable.
Figure 2
Battery Installation
Figure 3Figure 4
1. Press the tab on the bottom
panel of the disk drive as illus-
trated in Figure 3.
Remove the battery compart-
ment cover.
2. Insert 4AA batteries observing
correct polarity, as shown in Fi-
gure 4.
Be sure to place the ribbon pull
strip beneath the batteries when
you install new ones.
This will facilitate the removal
of the batteries when they are
exhausted.
3. Replace the battery compart-
ment cover.
Chapter 1
With 4new alkaline batteries, the disk drive can operate continuously for up
to 1.5 hours. When the low battery indicator lights, you should still have
approximately 30 minutes of continuous operating time left. No operation
will occur if the batteries are too low. In fact, the low battery indicator will
not even light.
Notes:
1. When the batteries are weak, the low battery indicator will light. When
this happens, replace all 4batteries with new ones. We recommend our
alkaline batteries, Radio Shack Cat. No. 23-552.
2. Turn off the power switch when the unit is not being used. If the unit will
not be used for a long time, or if the AC adapter will be used for an
extended period of time, remove the batteries to avoid damaging fluid
leakage.
(Be aware that even leak-proof type batteries which are guaranteed may
sometimes leak.)
Optional AC Adapter
Connect the AC adapter (26-3804) to
the DC 6V jack, and then plug the
adapter into awall outlet. The batter-
ies will be automatically disconnected
from the power supply circuit when
the AC adapter is connected.
Use only the 26-3804 AC adapter. If
the unit will not be used for along
period of time, disconnect the AC
adapter from both the wall outlet and
this unit's jack. Do not connect and disconnect the AC adapter while the
diskette is inserted the unit.
Figure 5
Auto Power Off
The disk drive has an auto power-off function. When no input is received
from the computer after 30 minutes, the drive is automatically powered off.
Even though the drive is powered off automatically, you should turn off the
power switch when the drive is not being used.

General Information
Diskette
The Disk Drive 2uses the single-sided, 3Vz" microfloppy diskette (Cat. No.
26-415 or 26-416).
Always handle your diskettes carefully. Take the same precautions you
would use with your music cassettes and high-fidelity phonograph records. A
small indentation, dust particle or scratch can render all or part of adiskette
unreadable —permanently!
1. Always remove adiskette from the drive before turning the system on or
off.
Caution: Do not eject adiskette when the access indicator is on.
2. Keep diskettes away from magnetic fields (transformers, AC motors,
TVs, radios, etc.). Strong magnetic fields will erase data stored on a
diskette.
3. Handle adiskette with the shutter closed. (Refer to Figure 6below.) Do
not touch any of the exposed surfaces. Do not try to wipe or clean the
diskette surface; it scratches very easily.
4. Keep diskettes out of direct sunlight and away from heat.
5. Avoid contaminating diskettes with cigarette ashes, dust or other parti-
cles.
6. In extremely dusty environments, you may need to provide filtered air to
the room where you use your computer.
Shutter
Write-protect window
When the write-protect tab is posi-
tioned so that the window is closed,
data can be written to the diskette.
When the tab is positioned so that the
window is open, data is write-
protected.
Figure 6
6
Chapter 1
System Start-up
Be sure that the cable connections are secure and that the batteries are
installed or the AC adapter is connected according to the instructions
provided in this manual. If you are ready, start up the disk drive by
following the procedure below.
Note: The Utility Diskette supplied with the disk drive cannot be used with
any portable computer operating in conjunction with the Disk/Video Inter-
face (26-3806)/Portable Disk Drive (26-3808).
System Disk
Figure 7
Figure 8
1. Power up your disk drive and port-
able computer.
2. Push the eject button. (Figure 7)
3. Remove the Head Vibration Protec-
tor and insert the utility diskette
(that was provided) with the label
side up, as shown in Figure 8.
Note: Use only a3.5-inch micro-
floppy diskette. If you insert the
diskette with the wrong side up,
damage to the diskette will occur.
4. Push down on the disk in/out bar
until it snaps into place. (Figure 9)
To remove the diskette from the unit,
push the eject button. If the diskette
does not pop out the first time, just
press the eject button again.
When the access indicator is on, do
not remove the diskette from the unit.
Figure 9

General Information
File Management Software
1. Turn on the computer and turn OFF the disk drive.
Write-protect your utility diskette (refer to Figure 6) and insert it in the
drive.
2. You will automatically enter the mainmenu ofthe computer. With the
cursor over the word BASIC, press 1ENTER \.
3. Type in the following program (Use all capital letters.):
10 RUNnCDM:98NlENN n
SAVE" IPL" IENTER
4. Type RUN IENTER I.
5. Now turn on the disk drive. The following message will be displayed:
INITIAL PROGRAM LOADER II
WAIT AMINUTE!
now loading -File-manager1
If this message does not appearon the display, you may have made a
mistake in the operation. Press 1SHIFT IIBREAK I.When the Ok prompt
appears, repeat the procedure from step 1.
If "?0M Error "appears on the screen, your computer does not have
enough free memory to run the IPL program. (You need at least 5K of
free RAM.) To resolve this problem, just delete some of the files for
space and try again.
If the low battery indicator on the disk drive flickers, begin again at step
JL
After the IPL operation, the terminal settings for TELCOM will need to
be changed back to your normal settings. Refer to your computer owner's
manual for information on changing these settings.
Note: When the message "System exists "appears on the display,
IPL cannot be run because of another program residing in high memory. If
you want to erase the old program and load File Manager, type:
CLEAR oc,
d6,MAXRAM ENTER
and try the IPL operation again from step 1.
6. After about 20 seconds, the menu will return automatically to the display.
You will find "FLOPPY" in the menu.
8
Chapter 1
Note: "FLOPPY" is the file name of the file management program. If you
do not find "FLOPPY" in the main menu, the program was not successfully
loaded. Chances are that there was not enough free memory. (You need at
least 5K of free RAM available.) Delete some of the files and try again,
beginning from step 1.
7. If you should have any problems with your system locking up while
loading "FLOPPY", press 1SHIFT 11BREAK Ito free the system and press
IF8 Ito return to the main menu. Eject the diskette and turn the disk
drive's power switch to OFF, then begin again from step 1. Be sure your
diskette is write-protected.

File Management 2
The Portable Disk Drive 2performs the following file management func-
tions shown in Table 1:
Table 1. Commands
Command
Files
Load
Save
Bank F4
Kill F5
Name F6
Format F7
Menu F8
Key
F1
F2
F3
Function
Displays the file names of all the DO, BA and CO files
on the disk.
Loads the DO, BA or CO file on the disk to the portable
computer.
Saves the DO, BA or CO file in the RAM of the
computer to the disk.
Toggles the default bank number.
Erases the DO, BA or CO file on the disk.
Changes the file name on the disk.
Formats the disk.
Exits and returns to the main menu of the computer.
Start-up
1. Turn on the computer and the disk drive. Insert adiskette.
2. In themain menu of the computer, move the cursor to FLOPPY and
press |ENTER I.
3. The following command menu appears:
Sep 30,1986 Sat 00:00:00 Bank x
Disk File Manager 'Ver. 02..00.00
RAM: xx xxx Bytes -free
File Load Save Bank Name Kill Frnt Menu
00:00:00 represents the time (hour:minute:second) which is shown on
the main menu. xxxxx Bytes -free indicates the amount of free
RAM available in your computer.
11

File Management
4. By pressing any of the keys IF1 HF8 I,you can select and execute the
commands of the file management program.
Configuration of File Manager
The memory map of the computer while FLOPPY is installed is shown in
Figure 10.
High address
MAXRAM >
System work
MSPLAN work
File manager
object code
File buffer
Free area
RAM file area
^Only for T200
MAXRAM :60000 (M100)
56672 (T200)
Figure 10
FLOPPY itself is not the main body of the file manager, but the initial
check and boot module. Though it has no extension, its construction is a
-CO file. The object of the file manager is invisible. Once you install
FLOPPY by running the IPL program, apart of the high memory is
occupied and the MAXRAM value is decreased to protect FLOPPY .Some
application programs that use the high memory will not work or will violate
FLOPPY. If you want to erase FLOPPY, use the utility program
FREMEM.BA stored on the system diskette. See Utilities.
12
Chapter 2
Disk Bank Feature
The file manager of the Portable Disk Drive 2 supports adisk bank feature.
The storage space of adiskette is divided into two portions called "disk
banks." Each bank can contain amaximum of 40 file entries and 200K bytes
of data, but total storage capacity of the two banks cannot exceed 200K
bytes.
The disk bank is specified by the number or 1. The file manager holds the
default bank number. When you omit the bank number in specifying the
disk name, the default bank is assumed. The default bank number is set to
initially and can be changed with the BANK command (|F4 |)of the file
manager. Of course, you can specify the bank. (Refer to the Load, Save
and Bank commands in the next section.)
The disk bank feature may seem as if there are two disks, although you
actually have one diskette.
This will be useful for classifying adocument, program versions, etc.
13

File Management
Commands
1. When the command menu appears on the display, press [FT
2. AH file names and their file size (in bytes) will be displayed
Example:
File Disk bank :o
AMERIC.DO 2300 BCC .BA 699
CANADA. DO 5829 F5HC .BA 59
TTCFG .BA 49 WGH50 -CO 2119
File names are displayed with up to 12 or 28 names on 1screen,
depending on the computer you are using. If there are more than 12 or
28 names, press any key to display the rest of the file names on the next
screen. There can be amaximum of 40 files on each disk bank and 80
files on diskette.
3. At the bottom of the last screen of file names on the disk, you will see
the amount of free space available on the diskette.
Example:
15600 Bytes -free
Hit any key,
4. Press any key and the command menu will return to the display.
To check the contents of another bank, press [~F4l at the command menu
and press |F1 |.
14
Chapter 2
1. When the command menu appears on the display, press 1F2 I.
2. The computer will ask you which file you want to load from the disk
Load Disk bank :0
AAA .BA 358 DOC .DO 1280
FLOPPY. CO 12345 TANDY .DO 3312
Select file:
If you want to see the next page of the file menu, press 1ENTER
i
Select -file: Ienter
If you want to see the file name of another bank, type;
Select -f i 1 e:1:1enter
3. Type in the file name with the appropriate extension
Select -file: TANDY. DO Ienter
If you want to load the file in another bank, type:
Select file:0:BCC.CO rENTEFf
4. The computer will ask you for the file name in RAM to which this disk
file is to be loaded.
File name in RAM:
If you want to assign the same file name as on disk, just press 1ENTER
The computer will name the file in RAM the same as on disk.
The extension (file type, .DO, .BA, .CO) of the file name in RAM will
automatically be the same as the disk file name, even if you don't key it
in. If you key in adifferent extension, the computer will disregard it and
make the proper extension.
15

File Management Chapter 2
5. If the file name designated in step 4already exists in RAM, the computer
will send the massage:
Already exists. Are you sure? (Y/N>
If you want to overwritethe existing file in RAM and load the file from
disk, press [Y] IENTER 1. If you don^t want to overwrite the existing file in
RAM, press QQ 1ENTER 1.Then the command menu will return to the
display.
If -the free RAM area on the computer is not sufficient to load the file,
"Lack of Space "will be displayed. This means you will need to
delete some of the files.
6. After loading afile, you will see the following message:
Dk
Hit any Key.
7. Press any key to return the command menu to the display.
j
1. When the command menu appears on the display, press |F3 I.
2. The computer will ask you which file you want to save from RAM:
Save Disk bank :0
AAA'. DO USDOLL.DO JAPAN. DO BBB.BA
TKCHHC.BA CCC.CO FWFF07.C0 CH6309.CQ
Select -file:
3. After you type in the file name with the appropriate extension (for
example, AAA. DO IENTER 1), the computer will ask you for the file
name on the disk to which the RAM file is to be saved.
Save as s
If you want to assign the same file name as in RAM, just press |ENTER
The computer will name the file on disk the same as in RAM.
Note: The extension (file type) of the file name on disk will automatically
be the same as that of the RAM file, even if you do not key it in. If you
key in adifferent extension, the computer will disregard it and make the
proper extension.
If you want to save the file in another bank, type:
Save as :l: JAPAN. DO
4. If the file name designated in step 3already exists on disk, the computer
will ask you:
Already exists. Are you sure? (Y/N)
If you want to overwrite the existing file on disk and save the file from
RAM, press \T} \ENTER |. Ifyou don^t want to overwrite the existing file
on disk, press [W\ IENTER |.Then the command menu will return to the
display.
When the free area on the disk is not sufficient to save the file,
"Lack o-f Space "will be displayed. This means you will need to
delete some files or use another disk with more free area.
16 17

File Management
5. After saving afile, you will see the message:
Ok
Hit any Key.
6. Press any key to return the command menu to the display.
If you attempt to save afile to adiskette, that is only partially formatted,
the file may not be properly saved even though the "Ok"prompt
appears. After you save afile on anewly-formatted disk, press 1F1I(the
Files command) to be sure the file was properly saved. If it was not,
begin again by re-formatting the disk.
1. Press fF4l and the default bank is toggled automatically.
The default bank number is displayed in the upper right corner of the
FLOPPY menu:
Bank x
Xindicates the defaultbanknumber or 1. It toggles between and 1
each time you press IF4 1.
18
Capter 2
1. When the command menu appears on the display, press \Ts_
The computer will ask you for the name you want to erase.
Kill Disk bank :0
BCCBO .CO 5489 F5HC46.C0 3210
TANDY .DO 5689 USA .DO 12345
Select -file:
2. After you type in the file name (for example, USA. DO IENTER I).
The computer will make sure you want to erase the file.
Are you sure? (Y/N)
If you key in [T] 1ENTER I,the file will be erased and you will see the
following message:
Ok
Hit any Key.
The display will return to the command menu.
If you do not want to erase this file, press [TQ IENTER 1.The display will
return to the command menu.
19
«*>—.»

File Management
1. When the command menu appears on the display, press IF6
2. The computer will ask you which file you want to rename.
Name Disk bank :0
AAA .DO 12345 F5H4 -CO 3450
JAPAN .DO 3657 TANDY .DO 568
Select -file:
3. After you key in the file name (for example, TANDY. DO 1ENTER I),
the computer will ask you for the new file name.
Change to:
4. Key in the new file name (for example, RADIOS. DO 1ENTER I).
If afile with the same name as the one you just entered already exists on
disk, the computer will let you know.
File already Exists
Hit any Key.
Press any key and the display will return to the command menu.
Note: The extension (file type) of the file name in the new name will be the
same as in the old one, even if you do not key it in. If you key in adifferent
extension, the computer will disregard it and make the proper extension.
5. After renaming, you will see the following message:
Ok
Hit any Key.
The display will return to the command menu.
Do not press |SHIFT 1|BREAK |to stop the renaming process.
20
Chapter 2
1. When the command menu appears on the display, press |F7
2. The computer will make sure you want to format the disk.
Format. Are you sure? (Y/N)
NENTER .The display will
If you don't want to format the disk, press
return to the command menu.
If you do want to format, press [T] 1ENTER [after you insert the disk. If
the disk contains data, the computer will ask you:
Diskette Contains Data.
Continue? (Y/N)
If you want to retain the data and stop the formatting procedure, respond
by pressing IN11ENTER |.The display will return to the command menu.
If you want to continue, press 1Y1|ENTER |.While the computer is for-
matting the disk, the display sends the message "Forrnatt ing. ..".
It will take about 100 seconds to format. After formatting, you will see
the following message:
Ok
Hit any Key.
Press any key and the display will return to the command menu.
When you interrupt the formatting process by pressing 1SHIFT 11BREAK I,the
disk drive will continue to access the disk. If this happens, the disk may not
be completely formatted.
When you want to return to the main menu of the computer, press |F8
The display returns to the main menu.
21

*9- Error Messages 3
When errors occur in the system, the display will show an error message.
These error messages along with the possible causes are listed below. If you
should get an error message, press any key to return to the command menu.
Drive not Ready
1. The drive is not turned on or the batteries installed in the drive are
exhausted.
2. The cable is not connected.
3. The drive has mechanical trouble.
4. The drive is formatting adisk.
5. The drive has automatically powered off.
•a
i:
'v
Cornrnun icat ion Error
1. During communication with the computer, the power to the drive is cut
off.
2. During communication with the computer, the cable is disconnected from
the computer and/or from the drive.
3. During communication with the computer, achecksum error occurs.
Abort
1. Pressing ISHIFT I|BREAK Istops the command being executed.
2. Abort occurs if you change the diskette while executing the Name
command.
File not Found
The file designated does not exist in the RAM of the computer or on disk.
File already Exists
The file designated already exists in the RAM of the computer or on disk.
v.-';..
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23

Error Messages Utilities 4
Lack of Space
1. The free area is insufficient for creating anew file in the RAM of the
computer or on disk.
2. The working area in RAM is insufficient for executing NAME or
BACKUP.
Write Protected
When the disk is write-protected, the portable disk drive cannot write data
to it.
Hard Trouble
Undefined error.
Disk I/O Error
1. The data on the disk is destroyed.
2. The disk is not formatted.
3. The disk is physically damaged.
4. The drive has amechanical problem.
Disk Out
The disk is not inserted in the disk drive.
File Empty
An attempt is made to SAVE afile which has no data.
Invalid File Type
An attempt is made to LOAD adifferent type of the file other than .BA,
.DO, or .CO.
Low Battery
When the batteries are weak, this message will be displayed beneath the
"Bank x"indicator in FLOPPY'S main menu. In this case, change all 4
batteries to new ones.
No bank
You tried to access the file of the 26-3808 diskette on Bank 1.
Un -for mat ted
You tried to access an unformatted diskette.
The utility diskette contains 3programs: FL0PY2.SYS ,BACKUP. BA
and FREMEM.BA .
FL0PY2. SYS is the file manager code and cannot be loaded by the load
function of the file manager. It is loaded and installed only by the IPL
operation. BACKUP. BA and FREMEM.BA are BASIC programs which
are used for duplicating asystem disk or removing FLOPPY from RAM.
BACKUP.BA
BACKUP.BA is used for disk duplication. This program not only supports a
data disk but also the utility disk backup. We recommend that you first
make another utility diskette for protection against accidental damage.
FLOPPY must be installed in your computer. BACKUP.BA does not work
without FLOPPY.
First, you need to load BACKUP. BA into the RAM of your computer by
using FLOPPY. (Refer to the previous section on load operation.)
Now, locate BACKUP. BA on the main menu and move the cursor over it.
Press IENTER
BACKUP UTILITY Ver.01.02
1) Opening Title
Insert BLANK disk* then hit any key
Pressing any key causes BACKUP to examine the disk and warn you if the
disk contains data.
Diskette Contains Data.
Continue? (Y/N)
If you want to retain the data and stop the backup procedure, press \~N
ENTER |.Pressing [T] causes BACKUP to begin disk formatting and
continues the backup procedure. Formatting takes about 110 seconds.
24 25
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Utilities Chapter 3
2) Reading data from the SOURCE disk
Prepare the original disk (called the SOURCE disk) and the BLANK disk.
Be sure to write protect the SOURCE disk. The BLANK disk must not be
write-protected.
The following screen appears:
Keep SOURCE disk write-protected
Current working Sector No. =###
Insert SOURCE disk* then hit any key
Insert the SOURCE disk and press any key. The disk drive reads as much
data from the SOURCE disk as it can store in the RAM of the computer.
The sector being read is displayed at ### area.
3) Writing Data to aBLANK Disk
After step 2), the following message is displayed:
Insert BLANK disk 7then hit any key
Remove the SOURCE disk from the drive and insert the BLANK disk.
Then press any key. The disk drive writes the data stored in RAM to the
BLANK disk. And the sector being written to is displayed.
Repeat the step 2) and step 3) operations until all information is copied.
4) Completing the Backup
The backup is complete when the working sector count reaches #0.
5) Error Messages for Backup
Message Description
No system FLOPPY is not installed in the computer.
Lack of Space BACKUP needs about aminimum of 2K
bytes free RAM space in the computer for
the data buffer. When this message is dis-
played, you will need to delete some of the
RAM files to free the space.
Write protected You attempted to format awrite-protected
disk.
Disk is not correct You inserted aSOURCE disk instead of the
BLANK disk or vice versa.
Disk Out Disk is not correctly inserted.
Drive not ready The drive is not turned on or the batteries
are not installed in the drive. The cable is
not connected.
Disk I/O Error This error occurs during reading or writing to
the disk. When this error occurs repeatedly,
there is amechanical problem in the drive.
Hard trouble Re-try the backup operation. If this error
occurs repeatedly, there is amechanical
problem in the drive.
Notes:
•As mentioned previously, BACKUP uses free RAM for a sector buffer.
The number of sectors copied at one time depends on the amount of free
RAM. If alot of free space is available in RAM, fewer disk changes will
be required.
•To abort the backup procedure, press
"hit any key ". Pressing Ishift ESC Iwhen the display prompts
BREAK [also aborts the backup,
but the original HIMEMof the computer will not be restored. If you exit
BACKUP by pressing ISHIFT IIBREAK I,execute the following BASIC
command to free the RAM space:
CLEAR 256,MAXRAM ENTER
26 27

Utilities
FREMEM.BA
FREMEM.BA is used for removing the file manager (FLOPPY) from
memory. Once FLOPPY is installed in the computer, MAXRAM is
changed. Even if you erase FLOPPY with the BASIC KILL command,
MAXRAM remains changed. FREMEM.BAerases FLOPPY and recovers
MAXRAM.
To use FREMEM. BA, load it from the utility diskette into the RAM of the
computer by using FLOPPY. Move the cursor over FREMEM.BA and
press |ENTER |.You will see following message:
Kill the 'FLOPPY' and -Free the space
Are you sure (Y/N) 7
If you want to remove FLOPPY, press [Y] 1ENTER 1.Pressing QT] 1ENTER
returns the main menu without erasing FLOPPY .
Once you kill FLOPPYwith the BASIC KILL command, you cannot reload
FLOPF'Y. If you run the IPL program the computer will return the message
"System enists "When this happens, enter BASIC and type the
following program (depending on the cumputer you are using):
For Model 100 or Tandy 102
10 READ A, I, J,Z,E
20 POKE A,I:POKE A+l,j:POKE A+2,I:P0KE A+3,J:POKE E,201
30 CLEAR 256, Z:MAXFILES=i
100 DATA 64218,243,127,62960,62297
&
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For Tandy 200 .'*J'i' ,
26-3808 Portable Disk Drive Diskette 5
The diskette prepared for the 26-3808 portable disk drive can be used with
Portable Disk Drive 2with the following restrictions:
1. The files on the 26-3808 diskette are considered to be on bank 0. If you
try to list the files on bank 1, the display shows "No bank"
2. You can use the File and Load commands only. When the Save, Kill or
Name command is issued, your portable computer will display
"Write Protected/'
To change the 26-3808 diskette to a Portable Disk Drive 2diskette, follow
this procedure:
1. Insert the 26-3808 diskette in the Drive.
2. At themain menu, highlight FLOPPY and press 1ENTER |.
3. Press 1F2 |and load the file into your computer.
4. Repeat step3until all the files you want to retain are loaded in RAM.
5. Press |F7 |to format the diskette to the Disk Drive 2system.
6. When formatting is completed, press |F3 1and save the file in RAM to
the diskette. Repeat this as many times as necessary.
If the size and/or number of files is too large to store in your computer
RAM, you will have to save the file(s) to another Portable Disk Drive 2
diskette.
10 READ A, I. J,Z*E
20 POKE A* I:POKE A+liJ:POKE A+2»I:P0KE A+3,J:P0KE E,201
30 CLEAR 256tZ:MAXFILES=1
100 DATA 62727, 168 i156,61104,58980
After checking that you entered the program correctly, run it. This will
recover MAXRAM and you can now reload FLOPPY.
28
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29

Appendices
31

i
Specifications A
Storage capacity (Formatted)
Per disk 202.24K bytes
Per track 2,560 bytes
Per hard sector 1,280 bytes
Disk Number of surface 1
Number of memory blocks
Total number of tracks 80
Total number of hard sectors 160
Recording systems
Recording method FM
Recording density 4,064 BPI
Track density 135 TPI
Data transfer rate 125K bits/sec.
Process time
Average access time 710 ms
Track-to-track 40 ms
in: Settling time 20 ms
Motor start time 1s
Rotational speed 300 rpm
Number of Indices 2
Power sources 4AA alkaline batteries
(23-552)
or
AC adapter (26-3804)
»w
33