squares, but not at all pins, this is how pin 9 of IC10 looks like:
There should be square on all the address pins.
The frequency on some pins is very high !
You may do the test at 10Hz range.
Set the frequency to 4.9000Hz and test again all the address pins.
At 490Hz please check the generator output waveform. - Is it very bad?
nice squares at all pins.
At 490Hz there is similar sine to the first pic I’ve posted. Very bad, practically no waveform is at 1kHz
I’ve also made a short video. This is generator output at 490Hz.
This test will show the whole memory content in every cycle of the waveform:
Select 1k range.
Set the frequency to 100Hz.
Please post the oscilloscope picture (one or two cycles displayed on the screen).
this is 100Hz on output:
Your video and this picture show that most of the RAM is OK.
Most probably you have to purchase a new RAM.
The original RAM is 32Kx8. The speed is 15ns.
okay,
I will try to find another RAM. Thank you for your helping and time!
seems it works! Tried with another PC, now I think I can get correct waveform.
Looks good 
It was a PC issue anyhow !
yes it seems that was some LPT problems again or what…
I will now do some tests, but it seems everything works. Also offset calibration.
Thank you for your hard work again!
No problem.
I’m happy that you found a solution and everything seems to work now!