HP-67 1706A00901 [RA and RB with Spike, doesn't read - doesn't write]

[albertofenini]

Hi Tony and thanks for the update

I have put a known working board and have seen the same behavior (though I haven't captured waves)
Don't know if this helps but I can tell you that writing a very simple program (7 ENTEr 7 X R/S) and
trying to write it on a card produces the following : the first side goes thru and then a second side is
requested, but when inserted for recording at the end of passing thru it gives an "Error" message
Also, switching from RUN to W/PRGM after a h RTN is pressed puts you in a random step and not
at the beginning of the program as you should expect
I'll do more tests ...
take care !