M68K Project Working Sort Of

[@hanspeterbestandig2054]

@4:03 I guess that you painted the real schematic wrong? I assume this because here DTACK is tied to VCC and the remaining circuit is meaningless. What signal does it drive?

[@Rick62820]

Yes, sorry the VCC is on the other side of the resistor and when the base of the transistor is low it pulls dtack low. (I tried to ascii art draw it below) VCC (5V) | (RPin 1) [Pull-Up Resistor] (10kΩ) | +--------- DTACK# (to CPU) | (RPin 2) [Collector] (T Left, 2N2222) | CE# Signal --> [Base Resistor] (10kΩ) --> Base -- [NPN Transistor] (T Middle, 2N2222) | [Emitter] (T Right, 2N2222) | GND

[@hanspeterbestandig2054]

@ This makes sense! Thank you for the explanation! 👍👏👏👏