HP 41C Video interface test. Howto?

[tribidouille]

Hi Sylvain,
Thank you.
Yes, I get to this point. My description was not clear enough.
Actually, it is exactly at this point (after having set the frequency of the TV to 62MHz to get an image from the video converter) where I get stuck. The Video Converter version B (europe) is sending a picture with characters.
But what do I have to do on the 41 to modify what is displayed, to print something else than these triangles (pic on post 1)? This is what I have to find.

I searched the Video Converter manual and also the HP-IL manual but didn't have success.
xeq ALPHA PRA ALPHA or xeq ALPHA PRX ALPHA...such tries didn't give any success.

I also tried to read the flag 55 with Video Converter on, plugged through HP-IL and 41 switched on (after VC has started), HP-IL switch to "enable": the 41 answers there is no printer.

Is there something to setup in the 41 like an address for printer or something of this type?

Thanks