Internal Atari ST Trackdisplay

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atari

 · 4 years ago

Internal Atari ST Trackdisplay (C) 1991 Beeblebrox Industries Unlimited.

Brief description on how to install the trackdisplay unit.

Connect TR00 to pin 23 of WD1772, WP to pin 25 of WD1772, WG to pin 6 of 7406 IC next to the WD1772 (U14), in order to avoid having to invert the WG signal that origins from pin 21 of WD1772.
STEP to pin 2 of 7406 (U14). (Originates from pin 16 of WD1772!!!).
Connect DIR to pin 17 of WD1772, SS to pin 21 of YM2149, +5V to pin 15 of WD1772, GND to pin 14 of WD1772. That's all folks! If you've followed my directions, this gadget will now work fine - at least it did for me...
If you live in Sweden, here are the ELFA order numbers for the parts.

  Amount:        Item:                     Number: 
  =======        =====                     ======= 
   1 Pcs         ICM 7217A                 73-760-23 
   1 Pcs         74LS07                    73-684-75 
   7 Pcs         100 K Ohm 1/4W            60-745-61 
   3 Pcs         470 Ohm 1/4W              60-719-06 
   1 Pcs         Red LED                   75-006-30 
   1 Pcs         Yellow LED                75-006-55 
   1 Pcs         Green LED                 75-006-48 
   1 Pcs         10-Pack LED Sockets       75-029-25 
   1 Pcs         2 Digit LED Display GK    75-516-58 
   1 m           Ribbon-Cable, 16 leads    55-660-54 
   1 Pcs         Veroboard                 48-393-04 
   1 Pcs         2 Pole, Two Way Switch    35-342-52