41CL: Plugging a Module from RAM rather than FLASH?

[burkhard]

(11-05-2018 03:55 PM)burkhard Wrote:  OK, I tried this again using my same procedure steps at top, but now with Turbo50 set (and verified to be 50 via TURBO?).
Unfortunately, I still get a different YCRC checksum every time I execute the upload from PC→41CL RAM.

UPDATE!
I think I might have figured it out.
In all the problematic tries I have chronicled, I had plugged the 41CL 9 pin cable directly into COM1 serial port on the docking station of my Dell M4800 laptop. The laptop itself doesn't have an old school serial port, so I only get one if it's in the docking station (also Dell, not an off-brand or anything).

Well, on a lark, I decided to borrow a USB↔Serial Converter and plugged it directly into the laptop (not using the docking station) where it was seen as COM6. I did everything else the same, and voilà, it now works fine. I can YIMP the CHEMUSER ROM into RAM verify its CRC correctly and then PLUG it into a port where it works fine. I even tried it a couple of times to be sure I just didn't get lucky once.

So, no idea why that is, but the extra USB↔serial gadget between the 41CL and the host PC fixed everything.

Hope that helps somebody...