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SWTPC DMF2, User Manual, Page: 27 / 32

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SWTPC DMF2 User Manual Download Page 27

Parts

List

-

DMF2A Disk

Controller

Resistors

Rl

1K

ohm

1/4

watt

resistor

R29

150

ohm

1/4

wattresistor

___

R2

1K"

R30

150

R3

10K

ohm

potentiometer

R31

150

"

 "

"

"

R4

10K

"

R32

10K

"

u

"

“

R5

140

ohm

1%

resistor

R33

470

"

"

"

"

R6

806

ohm

1% resistor

R34

10K

"

*

"

"

R7

2.2K

ohm

1/4

wattresistor

~~

R35

10K

"

"

"

"

—_— R8

2. 2K

"

"

,

R36

10K

tt

iy

a

R9

5K

ohm

potentiometer

R37

10K

"

"

"

"

____

R10

270

ohm

1/2

watt

resistor

R38

10K

"

"

"

"

R1l

10K

ohm

1% resistor

~~

R39

10K

"

"™

"

"

____

R12

1.1K

ohm

1% resistor

R40

10K

"

"

"

o

R13

3.48K

ohm

1% resistor

R41

10K

"

"

"

"

____

R14

3.48K

ohm

1% resistor

R42

10K

"

"

"8

R15

1.1K

ohm

1% resistor

~~

R43:

10K

"

"

"

"

_____

R16

10K

ohm

1%

resistor

R44

10K

"

"

"

"

R17

1K ohm

1/4

watt

res

istor

“

R45

10K

"

"

"

"

__

R18

1K

"

"8

tR46

7.5K

1/4

watt

resistor

R19

150

ohm

1/2

watt

resistor

~

tR47

10K

ohm

1% resistor

—__R201KK

"

"

____

R48

10K

ohm1/4

watt resistor

R21

5.6K

ohm

1/4

watt

resistor

R49

10K

___

R22

10K

R50

470K"

"

"

:

R23

10K

u

au

ity

a

—

R51

10M

u

u

tt

it

R24

100K

iT

wu

13

H

R52

1K

wt

n

“

at

R25

47K.

au

“u

u

ity

——

R53

10K

”

“

iy

u

R26

330

"“

a

u

a

R54

4.7K

u

a

iii

uw

R27

150

n

uw

ii

nu

_—_———

R55

10K

u

"

uw

u

R28

150

"

"

"

"

R56-10K

"

u

"

a

“———~

R57

220

u

a

“

nv

t

Value

may

vary

as

necessary

to

adjust

cycle

stretch

Integrated

Circuits

IC1

4558

dual

operational

C21

78L12

12-volt

regulator

amplifier

IC22

4024

voltage

controlled

IC2

96S02

dual

one

shot

oscillator

IC3

748112

dual

J-K

flip-flop

1€23

4049B

or

14049

hex

CMOS

IC4

74LS123

dual

one

shot

inverter

IC5

14541

timer

(MOS)

1C24

74LS86

quad

EXCLUSIVE-OR

1C6

74LS166

shift

register

gate

IC7

74LS02

quad

NOR

gate

IC8

74LS240

octal

buffer

IC9

74LS04

hex

inverter

1C10

74LS02

quad

NOR

gate

IC11

74LS240

octal

buffer

IC12

74LS240

octal

buffer

IC13

7805

5-volt

regulator

1€14

748112

dual

J-K

flip-flop

1C15

74LS00

quad

NAND

gate

1€25

74LS08

quad

AND

gate

IC26

74LS32

quad

OR

gate

C27

74LS33

quad

open

collec-

tor

NOR

gate

IC28

6844

DMA controller

1C29

74.8273

octal

latch

1C30

74.8273

octal

latch

1C31.74LS74

dual

D

flip

flop

1C32

79L12

-12

volt

regulator

MTTTTTT

EEE

MITT

TLE

FL

Summary of Contents for DMF2

Page 1: ...IMPORTANT NOTE Although every effort has been made to m h as possible Southwest Techni tion reserves the right to rev le ...

Page 2: ...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 on...

Page 3: ... the chassis so that it is the left drive as viewed from the front Before attaching drive 0 to 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 1 should have an extra w...

Page 4: ...d 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 per...

Page 5: ...r 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 2 MHz 1 MHz tt tt Precomp Norm Precomp Precomp MR Norm MR MR 56K 32K 56K 56K Desel Sel Sel Desel Address Select 4 4 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...

Page 6: ...stem 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 ca...

Page 7: ...lled on the desk Loading Flexible Disks To load a flexible 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 EJ...

Page 8: ...s storage envelope whenever it is removed from a drive 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 a lead pencil or ball point...

Page 9: ...m 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 ...

Page 10: ......

Page 11: ...d a will be displayed The diagnostic should be allowed to run until 256 s have been displayed REGTEST may be exited by depressing the RESET switch on the computer A diskette need not be installed in the drive STEPTEST The STEPTEST diagnostic can be used to verify that the track selection circuitry of the system drive and the controller are working properly If desired a blank diskette may be used i...

Page 12: ...8 RESTORE THE HEADS O10F 8D OC BSR EXEC EXECUTE THE COMMAND 0111 C6 4C LDB 76 TRACK 76 0113 7 03 STB 3 X STORE IN DATA REGISTER 0115 8D 11 BSR DEL28 WAIT FOR 1791 0117 C6 18 LDB 18 SEEK COMMAND 0119 8D 02 BSR EXEC _ EXECUTE THE COMMAND 011B 20 FO BRA LOOP RE DO THE STEPPING 011D 7 84 EXEC STB 0 X EXECUTE THE COMMAND O11F 8D 07 BSR DEL28 WAIT FOR 1791 0121 6 84 WAIT LDB 0 X LOOP UNTIL NOT BUSY 0123...

Page 13: ...STB 1 X STB 2X STB 3 X STB 21 X STB 22 X STB 23 X LDB 0 X BSR TEST LDB 1 X BSR TEST LDB 2 X BSR TEST LDB 3 X BSR TEST LDB 21 X BSR TEST LDB 22 X BSR TEST LDB 23 X BSR TEST INC BYTE LDB FE STB DRVREG BSR DELAY LDB FD STB DRVREG BSR DELAY LOB O FF STB DRVREG LDA 4 JSR OUTCH BRA _START CMPB _ s BYTE BEQ OK LDA Xx JSR OUTCH RTS bog LDX F FFF LEAX 1 X CPX 0 BNE DEC RTS FCB 0 END START START OF DMAC REG...

Page 14: ...sk controller board is fed to two unused pins on both of the disk drives thru the flat ribbon cable The miniature three pin connector on the motor control board must be plugged onto these unused pins on one of the two drives otherwise the drive motors will not turn on The orientation of the connector is important Check the instruction set for complete details Some of the components on this motor c...

Page 15: ...BA BS position the controller will respond only when BA and BS are high Normally a jumper on the 6809 processor board automatically puts the BA BS status on the BA line so the DMAF2 jumper should be left in the BA position 1 MHz 2MHz This jumper selects the MEMORY READY line timing in 6809 systems The jumper should be in the 1 MHz position for 1 MHz computer systems and in the 2 MHz position for s...

Page 16: ...3 8C00 8DFF 32 U 3 8E00 8FFF 32 L 4 9000 9 1FF 32 U 4 9200 93FF 32 L 5 9400 95FF 32 U 5 9600 97FF 32 L 6 9800 99FF 32 U 6 9A00 9BFF 32 L 7 9C00 9DFF 32 U 7 9E00 9FFF 56 L 0 EQ00 E1FF 56 U 0 E200 E3FF 56 L 1 E400 E5FF 56 U 1 E600 E7FF 56 L 2 E800 E9FF 56 U 2 EAQO EBFF 56 L 3 ECOO EDFF 56 U 3 EEOO EFFF 56 L 4 FOO0 F 1FF 56 U 4 F200 F 3FF 56 L 5 F400 F5FF 56 U 5 F600 F 7FF 56 L 6 F800 F OFF 56 U 6 FA...

Page 17: ...t c2 Tos WHITE ee To Walt Receptacle BLACK Parts List FD M Motor Control Board Semiconductors Qi ICI Resistors RI 180 0hm watt resistor R2 2200hm R3 4 7 K ohm watt resistor Capacitors Ci 0 01 mfd 400 V capacitor C2 0 1 mfd 400 V capacitor TIC206D or TIC216D 400 V triac MOC3011 optically coupled driver Note All voltage specifications are minimums 15 ...

Page 18: ......

Page 19: ... no D1 o nt mn mo oe D11 1N4003 diode D12 1N4003 diede D13 1N4003 diode D14 not used electrolytic capacitor _ C4 29 000 mfd 15 VDC electrolytic capacitor C5 1 000 mfd 25 VDC electrolytic capacitor C6 not used MELEE TARE Pky we Regulators Q1 LM323 5 VBC regulator Q3 notused Q2 LM317 adjustable regulator O4 notused Miscellaneous T1 Power transformer 50 60 Hz F1 2 amp slo blo fuse Primary 120 240 VAC...

Page 20: ...Ajddng vwemog Of a LLa ola 40 HOLIMS U3MOd 1 7 i 9 1 zert an 0 ft v 1 t oo a t Zz i INO z 10 ZL 1NO 24 10 ZL tL goal td ty ber tot 4 ze sa a ia bo ee ee tL v SH3EWNN Nid tN YOLOJNNOO ...

Page 21: ...e pictorial Remove the jumper labeled DL if it is installed Using a flat blade screwdriver or IC puller carefully remove the pull up resistor block as shown in the pictorial This drive is now programmed as DRIVE 0 A notation should be marked on the back or top of the drive labeling it as drive 0 Turn the other drive upside down and install the jumper block in the DRIVE 1 location DS2 as shown in t...

Page 22: ...ve 1 INDEX Connector to Motor T Control board s Drive 1 only install jumper here for drive 6 8 3 DS1 eles es 15V ee 5V Pull up resistor biock Remex Drive Programming Pictorial 19 B DS1 1B a s9 3wee 4Be e DS4 Do not change these shunts ...

Page 23: ... the DRIVE 0 jumper as shown on the pictorial below Using a flat blade screwdriver or IC puller carefully remove the two pull up resistor blocks as shown on the pictorial This drive is now programmed as DRIVE 0 A small notation should be marked on the back or top of the drive labeling it as drive 0 Turn the other drive upside down and install the jumper block in the DRIVE 1 location as shown in th...

Page 24: ... position rather than the 56K position use addresses 9020 and 9024 rather than F020 and F024 in all the following programs 0100 86 DE 0102 B7 F024 0105 B6 F020 0108 20 FB 3 Adjust the DF pot for 1 uS pulses on channel A Adjust the VCO pot for the waveform shown below Tet Chennel B 7 od LS LS Le Kaus 4 With the oscilloscope controls invert channel B and add channel A and channel B The waveform shou...

Page 25: ...AGE REGULATOR Oo oO o oO oO oO oO MOTOR CONTROL CABLE pon nnnnnn f POWERTRANSFORMER wf Moror i CONTROL i 1 BOARD i 1 i POWER pc CABLES SUPPLY wy i i 1 1 Ine nee 4 AC CABLES DRIVE 6 U DRIVE 1 DMAF2 CHASSIS LAYOUT PICTORIAL ...

Page 26: ......

Page 27: ... tt it R24 100K iT wu 13 H R52 1K wt n at R25 47K au u u ity R53 10K iy u R26 330 a u a R54 4 7K u a iii uw R27 150 n uw ii nu _ _ R55 10K u uw u R28 150 R56 10K u a R57 220 u a nv t Value may vary as necessary to adjustcycle stretch Integrated Circuits IC1 4558 dual operational C21 78L12 12 volt regulator amplifier IC22 4024 voltage controlled IC2 96S02 dual one shot oscillator IC3 748112 dual J ...

Page 28: ...4LS32 quad OR gate 74LS138 decoder 74LS132 quad _NAND gate 74LS245 octal bi directional transceiver 74LS138 decoder 74LS244 octal buffer 74L8245 octal bi directional transceiver 1034 1035 1036 1 37 1038 1C39 1C40 C22 0 1 mfd capacitor C23 3 a C24 iy tt C25 a a w C26 ut u n C27 i a C28 it i n C29 u wt C30 u su u C31 u ve C32 17 at iu C33 a 13 u C34 a ae C35 iT a au C36 a uw at C37 at u u C38 i u uw...

Page 29: ... pue os Aes 0 JYG12 OUR SOAISO uwone s9Nposg BO1U ISEMI osyy leaayew yons Aq peyeseu 40 poanou soBeiuep 10 sa1dei 40 Aryiq SUINSSE JOU HIM LOL sonporg yea ayqissod se jeuon pue aqemnace se UoRS poliddns ei eye OF epeut Ueeg sey 120 j0 Alene HONOR LON LNVLH ...

Page 30: ......

Page 31: ...ROU PUR aeIMOE se HONE usunoop peyddns oy seu 0 peur useq Fey 14019 Alene YBnOIp YY ZLON INVLHO O wr 8061 9 Suu OL uu mL éwro 9 zd SLY Zt h gasp vig ze ih 3 weve v zy RA tx zx Nt zby iyo wh Le pak eS 99 re awe i avo i 02 WA z Sow Vo sole wou is 69 say cern Lis le I Lad rr eu vuoZ NID OdA ou 2 ONINAALS NIOTS OSA ONIUASLS YIOTD OFA ZOPeNZ lo oy LAA A pened OvL rav id zs ePRT S 8 l mie 8 pes 7219 Wz ...

Page 32: ... 15 Fa DMF2A DOUBLE DENSITY WRITE PRE COMPENSATION 31 12 10 IMPORTANT NOTE eongaa 1 ic1g O Although every sffort has been made tomake the supplied documentation as sccurate and furre 1 19 fiona ssPossible Southwest Technical Products Corporation will not eesume responsibility fe t a 250nS inaccuracies or damages incurred OF generated by suchmaterial Also Southwest Technical Products 9602 Corporati...

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