SWTPC DMF2 Manuale utente

IMPORTANT

NOTE

Although every effort has been made to mh

as possible, Southwest Techni

tion reserves the right to rev’

SWTPC MODIFICATION -- APPLICATION NOTICE AN #120

Product: DMAF2 QUMEDT-8 Disk Drives

Date: July 16, 1980 G.K.

Unpacking and Packing Qume DT-8 Disk Drives

When unpacking your Qume DT-8 disk drives, it is very important

that you save all of the disk drive packing materials. These materials

include the cardboard insert to protect the disk drive head, the

styrafoam block which holds the door closed, the plastic bag dust cover,

the inner cardboard container, the foam packing inserts and the shipping

container. These materials must be used to repack the drive should it

ever be necessary to reship the drive or return the drive to the factory

for service. Packing the drive in acontainer other than the one

supplied or not properly preparing the drive for shipment can result in

costly damage to the drive and/or the drive head. Neither SWTPC, the

drive manufacturer, or the carrier will be responsible for such damage.

To repack aQume DT-8 disk drive for shipment, first unplug the

DMAF2 chassis from the AC wall receptacle. Disconnect all cables

attaching to the disk drive. Remove the four screws holding the disk

drive to the chassis and carefully remove the drive.

Open the disk drive door and carefully insert the cardboard disk

head protector so tab on the protector is fully inserted into the drive.

Now carefully close the door. Set the styrafoam block against the upper

back side of the drive's front panel and tape it in place. This block

prevents the door from being opened once the drive is placed inside the

inner cardboard container. Carefully place the drive inside the plastic

bag dust cover and secure with tape. Now slide the back side of the

drive into the inner cardboard container until only the front panel of

the disk drive is exposed.

Make sure that you have afoam insert properly positioned in the

bottom of the shipping container. Carefully set in the packed drive

oriented so the drive has its bottom side down. Now place the remaining

foam insert on the top of the drive assembly.

If the disk drive is being returned for factory service, be sure to

include documentation describing the problem with the drive and if

possible, documention confirming the date of purchase. Drives returned

to SWTPC should be addressed as follows:

Southwest Technical Products Corp.

Atten: Service Dept.-- Digital Group

219 W. Rhapsody

San Antonio, Texas 78216

DMAF2

Floppy Disk Unit

Introduction

___, The Southwest Technical Products Corporation DMAF2 is adual drive,

Single and double density, double sided eight-inch disk unit. The DMAF2

is designed to operate with the SWTPC SS-50 bus computer systems.

Although the DMAF2 jis designed to operate with two drives, up to four

drives may be used with aspecial daisy chained interconnection cable.

Although the DMAF2 Disk Unit was completely assembled and tested at

the factory, slight reprogramming of the circuit board may be necessary

to operate with your particular computer system. Also, the disk drives

may need to be installed in the chassis. It is suggested that this

instruction manual be read completely before attempting to use the

system. Step-by-step instructions are given for configuring the unit for

your particular system to minimize the possiblity of errors.

Disk Drive Installation

The two disk drives for the DMAF2 were probably shipped in their

original containers rather than being attached to the chassis.

Carefully remove each drive from its shipping container. One drive

should be clearly marked with a0and the other with a1. The drive

marked 0should be installed in the chassis so that it is the left drive

(as viewed from the front). Before attaching drive 0to the chassis,

install the 50-pin ribbon cable connector to its mate on the drive as

shown in the DMAF2 wiring pictorial. Be sure the connector is installed

so that the side of the cable with the colored band is facing toward the

drive motor as shown in the pictorial. The drive marked 1should have

an extra wire with aconnector on the end attached to the bottom circuit

board of the drive. When installing this drive be sure the wire and

connector extends out from the back of the drive so that it may be

connected to its proper mate on the motor control board. Both drives

should be securely fastened to the chassis using the #8 -32 screws

supplied.

Once the drives have been fastened to the chassis the power and

control cables should be installed. Although all connectors are indexed

and can only be installed one way, the step-by-step procedure should be

followed to avoid any errors. The wiring pictorial should be used to

aid in connecting the cables.

()Be sure that the DMAF2 is not connected to the power line.

()Connect the longer of the two AC cables from the motor control

board to its respective socket on drive 0. Be sure the connector

seats firmly in the socket.

()Connect the other AC cable to its socket on drive 1.

()Connect the longer DC cable to its respective socket on drive 1.

-1-

This connector is indexed and can only be installed one way.

()Connect the remaining DC cable to its socket on drive 0.

()Connect the motor control cable to its respective socket on the

motor control board. Be sure the connector is installed so that

the indexing pin in the female portion mates with the clipped or

removed connector pin on the board.

()Install the 50-pin ribbon cable connector on drive 1as_ shown in

the pictorial. This connector should also be installed so that

the banded side of the ribbon cable is nearest the disk drive

motor.

()Route the ribbon cable connector thru the slot along the top edge -

of the rear panel and install the cover using the #8 -32 black

screws supplied with the unit.

Programming the DMAF2 Controller Board

Before installing the DMAF2 controller in your computer system the

jumper options on the board need to be set properly. DO NOT, however,

change the adjustment of the three controls near the top of the board.

These were pre-set at the factory and should only be adjusted by

qualified service personnel. Jumper changes are accomplished by moving

the small (probably blue) jumper blocks which look like smajl

connectors. Acomplete description of each jumper position is given in

the DMAF2 Controller Board Jumpers section of the computer system

documentation manual (if applicable). In most cases the short table on

the following page may be used to configure the board for your

particular system. Make any jumper changes necessary.

DMAF2 Disk Unit Jumper Requirements

The following tables show the jumper settings to be used with the

DMAF2 double density disk controller in various system configurations.

In addition to the DMAF2 jumpers, some changes may be required to the

MP-09 processor board jumpers.

Table 1.1 -- DMAF2 Jumpers

DMAF

Jumper "S$"Systems Non "S" Systems (69A, 69K)

Halt/Bus REQ Bus Req Bus Req

Upper/Lower |Lower Lower

BA /BA&BS BA&BS BA&BS

IRQ/Norm |

Norm* Norm

2MHz/1 MHz tt tt

Precomp/Norm Precomp Precomp

MR/Norm MR MR

56K/32K 56K 56K

Desel/Sel Sel Desel

Address Select. 44

Table 1.2 -- MP-09 Jumpers

6809 Jumper "S" Systems Non "S" Systems (69A, 69K)

BA /BA&BS BA BA

110/BR BR BR

28/3S 3S 2S

tt Set to System Clock

*Set to IRQ for UniFLEX© operation

Installing the DMAF2 Controller Board

Now that the DMAF2 controller board has been jumper programmed

correctly it may installed in the computer. Most users should follow

the instructions given in the system documentation manual of the

computer. For other users be sure that power to both the disk and the

computer is off before installing the controller. Before installation

it is suggested that all memory in the system be checked for proper

operation. SWTPC computer systems require no special modifications, but

at least 20K of memory should be installed in the computer. The DMAF2

board should be installed in any of the un-used 50-pin card positions in

the computer. The remaining end of the 50-pin ribbon cable coming from

the disk drives should now be connected to the 50 pin connector on _the

DMAF2 board. The cable connector is indexed and can only be installed

one way.

This completes the installation of the DMAF2 disk system. The disk

may now be used as described in the Operating Instructions section of

this instruction set.

SWIPC DMAF2 Disk Unit OperatingInstructions

The DMAF2 Disk Unit is designed to be as straightforward and easy

to use as possible. The DMAF2 has only one operator control on it--the

power switch. This switch is located on the rear of the chassis and is

easily accessible to the user when used ‘in table top configurations.

When installed in aSWTPC desk, it should be left in the ON position.

Power is then controlled by the switch installed on the desk.

Loading Flexible Disks

Toload aflexible disk, simply depress

the pushbutton located on

the center of the front panel. The loading handle is spring loaded and

will then expose the load aperture.

Insert the flexible disk in the load aperture with the label toward

the operator and facing the loading handle (see figure). Be sure that

the flexible disk is inserted fully within the drive.

EJECT =

BUTTON

Write ProtectOption

Having the write protect notchon adiskette closed with apiece of

tape will allow the diskette to be written on. Leaving the notch open

will disable write privileges.

WRITE-ENABLE

[oe STICKER

if Q4

The LED's on the drives are drive select/head load lights and are

activated only when the head for aparticular drive is loaded on a

diskette. They are not power indicators.

The disk controller has been designed to load the head and turn on

the drive motors only when necessary. When the computer requests data

from the disk, both motors will activate and the correct head will load.

After the information has been retrieved the head will unload and both

motors will turn off approximately 60 seconds thereafter.

Just like cassette tapes, diskettes are made of magnetic materials

and can be erased by stray magnetic fields. It is an excellent idea _to

back-up all important disks on spare diskettes. The following

precautions should be followed concerning diskettes:

1. Return the diskette to its storage envelope whenever it is

removed from adrive.

2. Keep diskettes away from magnetic fields and ferromagnetic

materials which might become magnetized. Strong magnetic

fields can distort recorded data on the disk.

3. Replace storage envelopes when they become worn, cracked or

distorted. Envelopes are designed to protect the disk.

4. Do not write on the plastic jacket with alead pencil or ball

point pen. Use afelt tip pen.

5. Heat and contamination from acarelessly dropped ash can damage

the diskette.

6. Do not expose diskettes to heat or sunlight.

7. Do not touch or attempt to clean the disk surface. Abrasions

may cause loss of stored data.

8. Flexible disks must be in the same temperature-and humidity

environment as the disk drive for aminimum of 5 minutes before

installing the diskette in the disk drive. These environmental

requirements are as follows:

Temperature 50° F(10° C) to 80° F(27° C);

maximum gradient of 20°F (11.1°C) per hour

Relative 8% to 80%, maximum wet bulb

Humidity 82°F (29.4°C)

Booting the Disk Unit

After connecting the disk unit to the computer an attempt can be

made to boot the system.

Before booting the system be sure that the computer and disk are

both powered up. Next insert adiskette containing the disk operating

system into drive 0and close the door. The boot can then be executed

to load the operating system. Computers containing aDISKBUG® or

aDcommand. Users without those monitors must enter the boot by han

as listed in the disk operating system software documentation.

Problems

If any problems are encountered in booting the disk unit, the

REGTEST and STEPTEST diagnostics may be used to determine if the disk

controller is operating properly. Power up the computer system and the

disk unit. The disk unit is on when the cooling fan runs. If you do

run into some kind of problem(s) check the following:

1.) Make sure you have at least 20K of RAM memory.

2.) Run the memory diagnostics and verify this memory. to be good.

3.) Makes sure the disk controller board is properly programmed with

the shorting blocks.

4.) Makes sure the DMAF2 disk controller board is plugged onto the

computer system and is properly seated.

5.) Make sure the flat ribbon cable is plugged on the disk

controller board and is oriented correctly.

6.) Makes sure the flat ribbon cable is plugged

onto both disk

drives and is oriented correctly. Check the orientation very

carefully.

7.) Make sure the power connectors are plugged into their mates on

the back of both drives.

8.) Makes sure the miniature connector going to the FD-M motor

control board is oriented properly and plugged onto the

connector pins as specified in the instruction set.

9.) Confirm that the cooling fan on the disk system is running. It

should run whenever the disk system is turned on.

10.) Make sure you have the proper diskette installed in the system.

11.) Run the REGTEST diagnostic (details follow).

12.) Run the STEPTEST diagnostic (details follow).

Indice

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