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     ╘╚╔╙ ┴╥╘╔├╠┼ ╔╙ ┬┼╔╬╟ ╨╥┼╙┼╬╘┼─ ╘╚╥╧╒╟╚ ╘╚┼ ╨╔╨ ╧╬╠╔╬┼ ├╨/═ ═┴╟┴┌╔╬┼
     ╧╞ ╘╚┼  ╬┴╘╔╧╬┴╠ ├╨/═ ╥╧╒╬─╘┴┬╠┼  ╧╬ ╟┼╬╔┼.   COPYRIGHT (C) 1988  ┬┘
     ┬╔╠╠ ╩╒╠╔┴╬╔.   ┴╠╠ ╥╔╟╚╘╙ ╥┼╙┼╥╓┼─.   ╨┼╥═╔╙╙╔╧╬ ╔╙  ╚┼╥┼┬┘ ╟╥┴╬╘┼─
     ╘╧ ╬╧╬-╨╥╧╞╔╘ ╧╥╟┴╬╔┌┴╘╔╧╬╙  ╧╬╠┘ ╘╧ ╥┼╨╥╔╬╘ ╘╚╔╙ ┴╥╘╔├╠┼ ╧╥ ╨┴╙╙ ╔╘
     ┴╠╧╬╟  ┼╠┼├╘╥╧╬╔├┴╠╠┘ ┴╙ ╠╧╬╟  ┴╙ ╨╥╧╨┼╥ ├╥┼─╔╘ ╔╙ ╟╔╓┼╬ ╘╧ ┬╧╘╚ ╘╚┼
     ┴╒╘╚╧╥ ┴╬─ ╟┼╬╔┼.
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     *                                 *
     *     ╚ARDWARE ╚ACKING ├-128      *
     *                                 *
     *                                 *
     *     ┬ILL ╩ULIANI <├128.├╨═>     *
     *                                 *
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        ╚ARDWARE ╚ACKING ON THE ├OMMODORE 128, 1571, AND 1581

╧╦,  YOU SOLDERING FANATICS!!  ╚EAT UP YOUR IRONS FOR THIS LITTLE  UN-
TRIED  GEM.   ╔ PERSONALLY HAVE NOT TRIED IT <YET>, BUT PLAN  TO  REAL
SOON.

╔T IS COMMON KNOWLEDGE THAT THE 1571 AND 1581 CAN READ ─OUBLE  ─ENSITY
═╞═  DISKS.   ╫HAT ABOUT ╙INGLE ─ENSITY?  ┼VER BUY SOME  BARGAIN  ├╨/═
SOFTWARE  AND FIND THAT IT IS ╙INGLE ─ENSITY?  ╫ON'T WORK IN THE  '71,
╥IGHT?   ╚ERE'S  A  METHOD TO 'READ' THOSE  DISKS,  THANKS  TO  ═IKLOS
╟ARAMSZEGHY OF ╚ERNE ─ATA ╙YSTEMS.

╞IRST  OF  ALL, ╚ERNE ─ATA ╙YSTEMS OR MYSELF CAN NOT AND WILL  NOT  BE
HELD RESPONSIBLE FOR YOU CRACKING OPEN YOUR DISK DRIVE, AND BLOWING IT
UP,  AND  WE ARE NOT TELLING YOU TO DO THIS  MODIFICATION.   ╔'M  ONLY
SUPPLYING  THE INFORMATION TO YOU 'AS IS', UNTRIED AND UNTESTED,  MORE
IN  THEORY, THAN A COOKBOOK OF '╚OW ╘O..'.  ╬ATURALLY THIS  WILL  VOID
ANY  ╫ARRENTY ON YOUR DISK DRIVE, AND ╔ WOULD STRONGLY ADVISE  AGAINST
DOING  THIS MODIFICATION, IF YOU ARE NOT MECHANICALY OR  ELECTRONICALY
INCLINED.  ┴LSO BE AWARE THAT CONVERTING YOUR DRIVE TO ╙INGLE  ─ENSITY
WILL  NOT  AUTOMATICALLY  ALLOW YOU TO READ  ╙INGLE  ─ENSITY,  HOWEVER
╩UGGLER, BY ╚ERNE ─ATA ╙YSTEMS WILL.
╠ET'S TAKE A LOOK AT SOME 'STATS'.  ╘HE ╧SBORNE 1 CAN READ BOTH ╙INGLE
AND ─OUBLE DENSITY DISKS, CHECK OUT THE TWO FORMATS:
                    ╙INGLE ─ENSITY                ─OUBLE ─ENSITY
╘RACKS PER DISK          40                            40
╙ECTORS/TRACK            10                             5*
╠OGICAL ╙ECTORS/TRACK    20                            40*
┬YTES/SECTOR            256                          1024*
─ISK ├APACITY (╦)       100                           200*
─IR ╘RACK                 4                             4
╙TORAGE ├APACITY (╦)     92                           185*
╙ECTOR ╙KEW               2                             1*

╬OTICE THAT SEVERAL THINGS CHANGE (THE * ITEMS) WHEN SWITCHING BETWEEN
SINGLE  AND  DOUBLE DENSITY DISKS ╧╬ ╘╚┼ ╙┴═┼ ├╧═╨╒╘┼╥!!  ╬OW  ╔  KNOW
THAT  THE  '71  AND  '81  ARE SMART  DEVICES,  BUT  IT  WOULD  TAKE  A
PROGRAMMING   EXPERT  TO  INCORPORATE  ╙INGLE  ─ENSITY  ╞ORMATS   INTO
SOMETHING USEFUL.  ╙O NOW YOU HAVE TWO WARNINGS:  YOU FIRST MIGHT RUIN
YOUR  DRIVE TRYING TO MAKE THIS MODIFICATION, AND SECOND, EVEN  IF  IT
WERE SUCCESSFUL, YOU MIGHT NOT BE ABLE TO USE IT!  ╧╦, ENOUGH FOR  THE
WARNINGS.

┬OTH  THE  1571  AND  1581  DISK DRIVES USE A  1770  CHIP  AS  A  DISK
CONTROLLER.   ╨IN 26 IS TIED LOW FOR DOUBLE DENSITY DISKS.  ╬OW  IF  A
PERSON  WAS  TO  REMOVE THE PIN 26 FROM WHERE IT IS  SOLDERED  TO  THE
PRINTED  CIRCUIT BOARD, LEAVING THAT POINT OF THE ╨├ BOARD EMPTY,  AND
SOLDER  THIS PIN TO A LENGTH OF WIRE AND THEN CONNECTING THE  WIRE  TO
THE  COMMON  TERMINAL OF A ╙╨─╘ SWITCH.  ╬OW FIND A LOGIC HIGH  AND  A
LOGIC LOW ON THE ╨├ BOARD.  ┴ HIGH CAN USUALLY BE FOUND AT PIN 14, AND
A  LOW AT PIN 7 OF MOST 14 PIN CHIPS; OR PINS 16 (HI) AND PIN 8  (LOW)
FOR  MOST  16 PIN CHIPS.  ┴ FIVE VOLT ╚╔ AND A ZERO VOLT LOW  WILL  BE
FINE  FOR EITHER ├═╧╙ OR ╘╘╠ CHIPS.  ╘HE NOW EMPTY ╨├ BOARD WHERE  PIN
26 WAS SOLDERED TO WILL BE FINE FOR THE LOGIC LO.  ╘AKE TWO MORE  WIRE
LENGTHS  AND  SOLDER THEM TO THE OTHER TWO TERMINALS  OF  THE  SWITCH.
╙OLDER  ONE WIRE TO THE ╚I THAT YOU FOUND, AND THE OTHER TO  THE  LOW.
├URRENT   LIMITING  RESISTERS  WOULD  BE  NICE,  BUT   ╔'VE   RECEIVED
CONFLICTING INFORMATION ON THE NEED FOR THEM.  ╬OTE WHICH SIDE OF  THE
SWITCH  IS  LOW (DOUBLE DENSITY) AND HI (SINGLE  DENSITY).   ├AREFULLY
DRILL A HOLE IN THE PLASTIC CASE OF YOUR DRIVE, AND MOUNT THE  SWITCH.
═AKE  SURE  THAT  THE  WIRES DO  NOT  INTERFERE  WITH  THE  MECHANICAL
OPERATION  OF THE DRIVE.  ╔ WOULD ALSO SUGGEST THAT YOU USE  A  GROUND
WIRE ON YOUR IRON TIP, AND AVOID STATIC DISCHARGES.

╬OW YOUR DRIVE IS READY FOR SINGLE DENSITY DISKS, AND THE FULL USE  OF
╩UGGLER!

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┴ $7.95 2400 ┬AUD ═ODEM?

┘ES!   ┘OUR  EARS AND EYES DID NOT DECEIVE YOU!!  ╔TS  CALLED  A  ╬ULL
═ODEM,  AND  IS USED FOR TWO COMPUTERS TO TALK BETWEEN EACH  OTHER  AT
VERY  FAST  RATES.  ╬O OTHER MODEM IS NEEDED, JUST AN ╥╙-232  PORT  ON
EACH  COMPUTER.   ╥ADIO ╙HACK SELLS THEM FOR $7.95, ├AT.  ╬O.  26-1496
WHICH  HAS ONE MALE AND ONE FEMALE ─┬25 CONNECTOR.  ┬OOT UP YOUR  TERM
PROGRAMS  ON  EACH COMPUTER AFTER HOOKING THEM TO THE ╬ULL  ═ODEM  AND
TRANSFER  AWAY.   ═Y ├-128 DOESN'T LIKE TO TRANSFER FASTER  THAN  2400
┬AUD, BUT ITS BETTER THAN 300 ┬!  ╘HE ╬ULL ═ODEM IS REALLY TWO ╥╙  232
CONNECTORS  WIRED TOGETHER EXCEPT PINS 2 AND 3 ARE SWAPPED.  ╙URE,  GO
OUT AND BUY A MALE AND FEMALE ─┬25, RIBBON WIRE, AND SOLDER AWAY!  ╠ET
ME KNOW WHEN YOUR DONE IF YOU SPENT MORE THAN $7.95, ╧╦?  ╥UMOR HAS IT
THAT  OWNERS  OF THE ╧═╬╔╘╥╧╬╔╪ ─ELUXE ╥╙232 ╔NTERFACE  NEED  ONLY  TO
MODIFY  THE LEFT HAND SWITCH SO THAT INSTEAD OF SWAPPING PINS 2/3  AND
4/8 IT JUST SWITCHES 2/3, ELLIMINATING THE NEED FOR A NULL MODEM.   ╧F
COURSE  IF YOUR TRANSFERING ┴╙├╔╔ OR TEXT FILES THE ABOVE METHOD  WILL
EASE  THE PAIN OF COMPATIBILITY PROBLEMS BETWEEN  DIFFERENT  OPERATING
SYSTEMS.