Hardware implementation of Free42/Plus42 other than DM42? - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: Not HP Calculators (/forum-7.html) +--- Forum: Not quite HP Calculators - but related (/forum-8.html) +--- Thread: Hardware implementation of Free42/Plus42 other than DM42? (/thread-20456.html) |
Hardware implementation of Free42/Plus42 other than DM42? - rex4good - 09-05-2023 07:18 AM I saw this keyboard the other day, which got me thinking... And after playing with the keyboard layout manager for 5min, this is what I came up with that might work for Plus42 as an input device (borrowed some idea from the Voyage series for CHS / EEX / ENTER). I guess the question now is whether there is a way to run Plus42 on a standalone / portable device together with this keyboard, and they may be then put into some 3-D printed case? RE: Hardware implementation of Free42/Plus42 other than DM42? - BruceH - 09-05-2023 10:29 AM Enter key is rather too close to the off key for my liking. :-) And using it portrait rather than landscape will probably lead to RSI-type problems as you'd have to lift your entire arm up to reach the top row. On the plus side, there's a Linux version of Plus42 so you might manage to port it to a small RPi or similar device which could be fitted with a display. Start by porting Free42 and then tell Thomas what changes you had to make so he can consider whether to do a Plus42 version. RE: Hardware implementation of Free42/Plus42 other than DM42? - rex4good - 09-05-2023 11:02 AM Would swapping ENTER with STO & RCL make it slightly more appealing to you? :-) Talking about porting it to RPi... any specific model / screen you'd recommend? I have some experience with Linux programming on both x86 and ARM, but actually never tried RPi before. RE: Hardware implementation of Free42/Plus42 other than DM42? - John Keith - 09-05-2023 11:23 AM (09-05-2023 11:02 AM)rex4good Wrote: Talking about porting it to RPi... any specific model / screen you'd recommend? I have some experience with Linux programming on both x86 and ARM, but actually never tried RPi before. A Zero W would be more than adequate and you would have WiFi and BlueTooth. I think I have seen versions of the Memory LCD display used in the DM4x platform that are made for use with the Pi. Look at pimoroni.com and adafruit.com for a large (but overlapping) selection of displays. One limitation of the Raspberry Pi's is the lack of power management. You basically have to "roll your own" there. RE: Hardware implementation of Free42/Plus42 other than DM42? - FreeBlues - 03-21-2024 05:05 PM How about M5Stack Cardputer? I saw 2 posts talking about it: https://www.hpmuseum.org/forum/thread-21052.html https://www.hpmuseum.org/forum/thread-20967.html Here are its hardware specifications, taken from its [official documentation](https://docs.m5stack.com/en/core/Cardputer). Quote:M5StampS3 Microcontroller. Its price is $30, but there is a downside: its keyboard is relatively small. |