As you read the title I had problem with rolling " \\\\\\\\\\\\\\\\\\\\\\\\\" on reset screen. I read the topic about 74123 or the 27k resistor next to it that maybe need replacement in order to get 480ns timing for the ram ic's.
Anyway, before i "play" with the resistor i replace the 74123 with new one that had already and problem fixed. No more rolling "\\\\\\\\" and reset screen was great!
What happens now, but not often, some times in reset screen before "@" symbol i got lines like that "_ _". Some times only one line, some times more. Some times rolling for sort of time to more than 10 lines, then stop and maybe 3-4 minutes later some more lines appear. But as I says that happens not often.
I tried to measure with oscilloscope the timing of 74123 (pin 5, is that correct?) but i saw no stable "ns". I have to say that i am very new to oscilloscope and maybe I did faulty measurements.
Any help will be more than welcome!
I take of the 27k resistor and measure it 30,6k. I add a trim pot and drop it to 27k. I don't know if that was the problem, but no line's till now. We will see.
But still interested to get a proper measure for the 480ns timing, so of course i will wait for your reply's!