HP-50g - In depth data sheet

[Claudio L.]

(04-17-2019 02:29 PM)Visty Wrote:  Does anyone know if there exists an in depth data sheet for the hp 50g that states things such as the current draw and protocols used for data transfer. Asking due to an interest in possibly modding mine.

What mods do you have in mind? Are you talking very low level hardware datasheet? Look for the S3C2410 manual, it has pretty much everything you need to know. I have (mostly in my head and some scattered paper sheets) a lot of information about the inner workings of the 50g hardware and I don't mind sharing with you. As a matter of fact, low-level drivers are available in source code as part of newRPL, you could remove the RPL core (or not!) and just use the machine like your own personal Arduino. Using your own firmware gives you total freedom to implement whatever protocols you want, you have full control of all GPIO, buzzer, timers, USB port, serial port, etc.
However, an actual Arduino might work better for you unless you need the keyboard, which circles back to my first question: what mods do you have in mind?