HP-71b - Future "SD-RAM" Module - viable ?

[JanS]

@mfleming:
The PCB inside the housing could pick up the angle determined by the slot - so using a standard "clicky" sd card holder should be possible. With regard to what the device should do, i think FRAM alike operations in addition to HP-IL device Emulation (if possible at the same time) for Disk Drive and possibly a printer like device that logged output to a text file.

@keithb
Definitely MCU based, so as to be able to pull itself into operation by just having the right files stored on the SD Card and having them presented to the 71b.
An ESP32 would probably fit into the enclosure space and add WIFI & BT to the mix. Thos could even be toggled by the 71 and stay off until needed. LEX files and I/O data could be shared via Wifi, somewhat similar to what your FatFS on a Flashair is doing.

Who knows - two such devices could probably do HP-IL over the airwaves.

Again, I'm not an EE, so I'm not sure about power consumption / startup times etc.

So, just a dream at the moment....

Stay Healthy and keep calculating,
Jan