Op 22-01-2021 om 14:22 schreef gareth evans:
> It is 50 years ago this year that I cut my teeth on a naked
> PDP11/20 with no OS and only an assembler. Everything I did
> was up to me.
>
> Over the years I have been involved in real-time OS
> development and language interpreters to the extent
> that in my retirement I've an N-I-H stance towards
> others' software.
>
> I'd like to relive my youth but with the 64-bit instruction
> set of the ARM but without being imbrangled in all the
> bolt-on (Lancashire?  :-)  ) goodies that the RPi4 has.
>
> I don't have the capability to produce the PCB and
> solder down a BGA myself, despite a radio ham's
> junk box of nearly 60 years' standing.
>
> In my retirement, I have some ideas on language
> development, essentially interactive as was BASIC
> and FORTH but running at the speed of compiled
> code, and the 64 bit ARM instruction set looks
> like a good starter.

A Teensy 4.x might be a good start. ARM Cortex M7 600 MHz, floating
point hardware, lots of RAM and flash.
https://www.pjrc.com/store/teensy41.html

(It says 64-bit fp...! :) but I think that's "just" an accelerated
simulation using 32-bit register pairs.)

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