Internal Atari ST Trackdisplay

@atari

Published in

atari

· 18 Dec 2020

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