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Problem fixed It works! My major fault was to focus on /INT wrong signal, (due to a phase delay of /INTACK), as DarrenF suggested I've re-checked buffer @M9. By triggering M9 output signals on /IN0 I've found that two lines (/FIRE2 and /TEST) were zero even if the inputs were high. Replaced...

The problem persists with the switches connector unplugged, I'll exclude broken traces at least on address bus since I've checked all the lines shared among the buffers. Buffer @M9 works as expected. /IN0, /IN1, /IN2 seem to be ok, at least they have same frequencies and waveforms of the working...

It always boots in test mode ignoring the test switch status IC @F7 has been replaced but still the /INT signal is wrong in the faulty pcb the signal width is almost twice the right one. Checked the inputs (/INTACK, 32V and FLIP) and they seem to be the same. I wrote "seems" because right now I...

Clock is ok (10 MHz) and also vertical and horizontal counter are ok.

Missile command stuck in test mode (bad INT signal) My MC always boots in test mode and the screen keeps flashing as one (or more) button is continously pressed. Compairing my PCB with a working one I've found that INT signal has the right frequency but the active time is twice the expected...

Perfectly working, fortunately it was almost working when I bought it (actually I bought two rally, the other one belongs to vernimark). I've just replaced one paddle pot and the player switch , monitor was in a great status. I agree, the switch is ugly I'm almost sure that yours is the...

I know this is not the best picture but it's the only one I have.

I had the same problem with my Rally, left knob had screw not too rusted so it was easy to remove it with a small allen key. The screw in the right knob was in a very bad state and first attempt to remove it definetely damaged the screw head. Since the right pot was not working I decided to...

Hi, I'm looking for manual, schematics & flyer for this game: Rally (Klov entry) it's a single/double player pong game made by "For Play" in 1973. I'm also interested in contacting anyone that has this game, specially the version without the player selector on the CP. Thanks in advance