Load a Photo Yes/No?

[debrouxl]

There's also an online file converter for multiple calculator models of 3 brands, see http://www.hpmuseum.org/forum/thread-439.html -> http://tiplanet.org/forum/editgx.php . It handles image color conversion by itself, and supports scrolling, for images larger than 320x240.

The fact that PrimeComm and libhpcalcs transfers are slow is a limitation of the USB HID protocol used by HP. There's a clear upside to using HID instead of custom protocols: that way, on Windows, the Prime doesn't require drivers, and therefore, HP doesn't have to perform support for Windows-driver-related trouble or have their custom drivers signed (*).
Other, saner OS, don't require drivers for most devices using custom protocols.

The fact that the Prime displays a range of kinds of incorrect behaviour in daily usage, especially after transferring large files (~1 MB) and/or executing them afterwards, remains unfixed, almost a year after the initial market availability of the Prime. For now, like many users, you'll find yourself carrying a paper clip, or equivalent, to reboot your calculator on a frequent basis.


*: signing requirements are worse if the driver is based on generic software such as libusb. On Win 8 / 8.1, the CAT files must be signed as well, which is done at install time. At least, self-signing works, for now. Who knows how Windows 9 and successors are going to inconvenience third-party developers even further...