HP41 extension ports pinout

[eried]

(02-11-2019 07:18 PM)rprosperi Wrote:  

(02-11-2019 02:01 PM)eried Wrote:  ...or a $3 USD ESP8266 to give the 41 access to wifi

In any case I doubt easy is accurate, but it's worth pointing out that the 41C does not have a TCP/IP stack, so even if WiFi h/w was available, (including the equivalent of a driver in MCODE) you still could not do much with it, or maybe you have more ambitious goals in mind. Not trying to rain on your parade, just want to make sure you know how much you are tackling.

Yes, I am aware, and probably no calculator has a tcp/ip stack. However I am just thinking on some super simplified interface where the ESP8266 handles everything. Imagine for example just copying a program in your PC transferred it to the calc like if you swiped a magnetic card on it

Checking the prices for the modules and accessories for the 41 made me think it is a way better investment to research into doing something new

(02-11-2019 07:27 PM)AndiGer Wrote:  My immediate idea was this
http://www.hpmuseum.org/guest/klug/dblxmem.pdf

Thanks for the links! this is specially useful