17.8 BLITZ Floppykabel

BLITZ - THE BACK UP SYSTEM

You must have two floppy drives to use BLITZ!

BLITZ is a revolutionary new back-up system for the Atari ST computer. BLITZ uses ONLY a special cable and software to back-up your software at at a speed and power unheard of before. There is NO internal wiring done to the computer. The BLITZ cable copies from Drive 1 out through the Computer printer port to drive 2. It reads Drive 1 and writes Drive 2 at the same time. The time it takes a normal copy program to read a disk, the BLITZ reads and writes the disk in one pass. The BLITZ backs-up protected and non-protected disks in the same amount of time.

BLITZ only made copies from Drive A, an internal drive or an external drive to Drive B, an external drive.

1): If Drive 1 is external, connect the Computer to Drive 1 in the normal manner using your original ST drive cable.
2): The rectangular 25 pin DB connector connects to the Computer's printer out port.
3): If Drive 1 is internal, the circular 14 pin DIN connector with the thinner cable connects to Computer drive's out port.

If Drive 1 is external, the circular 14 pin DIN connector with the thinner cable connects to Drive 1's out port.
4): The circular 14 pin DIN connector with the thicker cable connects to Drive 2's in port.

BLITZ - INSTRUCTIONS

You will NOT be able to use your external drive in a normal way with the BLITZ cable plugged in. This cable also need "BLITZ.PRG" and "BLITZ.RSC" on your computer!

CABLE - CONSTRUCTION

1 - 6 Foot ST Drive Cable
1 - DB 25 Pin Male Printer Plug
1 - DB 25 Printer Plug Hood
1 - Disk (BLITZ Program)

To assemble the BLITZ cable, basically all you have to do is cut an Atari disk drive cable and add a third plug that goes to your computer printer port. If you own an internal drive you should measure the distance from your computer to your external drive and cut the cable accordingly (Remembering that the total cable length is 6 feet and that the rest of the cable goes from the computer's printer port to the computer's disk drive port). However, if you own two external disk drives, cutting the cable in half is probably better, because both drives should be of equal distance from the computer.

On the next page are all the connections necessary to build the cable. However, the cable wire colors are ONLY from the cable supplied by at your service.

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                   14 PIN MALE PLUG (ATARI DIN STYLE)
                              PIN LAYOUT
                    (VIEWING FRONT OF PLUG/PIN SIDE)

                                 GRY
                                  *
                     VIO * 3      1      2 * WHT
                  BLU * 5        RED        4 * BLK
                GRN * 7   ORG     *     BRN   6 * PEA/BLK
               YEL * 9     *      14     *     8 * BLU/BLK
              PEA * 11     13           12     10 * WHT/BLK

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                       25 PIN MALE PLUG (DB STYLE)
                               PIN LAYOUT
                   (VIEWING REAR OF PLUG/SOLDER SIDE)
                                                             BLU
                                                              &
                                             BLU/    WHT/    PEA/
                             ORG     BLK RED BLK YEL BLK BRN BLK WHT
 18  17  16  15  14  13  12  11  10   9   8   7   6   5   4   3   2   1

 36  35  34  33  32  31  30  29  28  27  26  25  24  23  22  21  20  19
                                                                 GRN

COMPUTER (INTERNAL)                                 COMPUTER
OR DRIVE 1 (EXTERNAL)      DRIVE 2                  PRINTER
OUT PORT                   IN PORT                  OUT PORT
-------------------------------------------------------------------------
14 PIN DIN PLUG (MALE)     14 PIN DIN PLUG (MALE)   25 PIN DB PLUG (MALE)
-------------------------------------------------------------------------
                               1                             - Read Data
                               2 --WHITE--------------- 2    - Side 0 Select
Logic Gnd 3 --VIOLET--VIOLET-- 3                             - Logic Ground
                               4 --BLACK--------------- 9    - Index Pulse
                               5 --BLUE---------------- 3    - Drive 0 Select
                               6 --PEACH/BLACK--------- 3    - Drive 1 Select
                               7 --GREEN-------------- 20    - Logic Ground
                               8 --BLUE/BLACK---------- 7    - Motor ON
                               9 --YELLOW-------------- 6    - Direction IN
                              10 --WHITE/BLACK--------- 5    - Step Pulse
  Read Data 1 --GRAY--PEACH-- 11                             - Write Data
                              12 --BROWN--------------- 4    - Write Gate
                              13 --ORANGE------------- 11    - Track 0
                              14 --RED----------------- 8    - Write Protect
    SHIELD ---------------  SHIELD ----------------- SHIELD

Any technical information from:

AT YOUR SERVICE
2856 Leechburg Road
Lower Burrell, PA 15068
Phone: (412) 335-4477