I think the KEY to memory card power consumption would be if/when the 360LX tells the card to go to sleep. And if the HP wakes it periodically.
- Sleep/in-use power consumption of CF cards varies by brand, model, size, type, build date. I have seen claims of old, small CF cards with low power consumption. Do some research and testing.
- You can try toggling any sleep / light-sleep / deep-sleep functions. I think enabling light-sleep should just lower power consumption while the HP is "in use" but who knows how that logic works.
- Try fully shutting down the 360LX when not in use. The HP PalmTop Paper suggested keeping older HPs plugged in when not in use; personally I would keep these off mains for voltage spikes.
- If you are using a CF-SD card adapter, those are notoriously bad quality. So could be draining power on their own and/or preventing the 360LX from correctly putting the slot into a sleep mode. Alternatively, if you can find an adapter that ejects the SD card easily without removing the SD card, you could experiment with that.
- I wouldn't try removing the CF card too much as the pins inside the HPC won't last forever.
- The 95LX had some DOS control of the serial ports with SERCTL {/O|/W|/1}. but I don't know if the 360Lx had similar for all the ports.
http://www.hpmuseum.net/pdf/TheHPPalmtopPaper_V3B1_48pgs_1994_OCR.pdfEdited by AximUser 2023-08-12 6:06 PM