Mafos:
johnwasser:
If you want the button to do a Reset you should provide a pull-up resistor on the Reset line and have the button ground the line.Yeah, this would be nice. So following your description, I put 2 x 10k resistors parallel between RST and the switch, and then connected the switch to the GND. Well, this doesn't work
, so please tell me what connection should be used here?
Pull-up resistors connect between the signal pin (RST) and VCC (+5v).
Connect the button between the signal pin (RST) and Ground.
The example for a Z80 tester I found vie Google mentioned that the RST line had to be held LOW for at least four clock cycles to assure a proper reset. They said the processor got into all sorts of strange states on a short reset.