Electronics > Microcontrollers

How dead are 4bit MCUs?

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SiliconWizard:

--- Quote from: harerod on June 25, 2022, 08:03:57 am ---A bit late to the show, but closer to the original topic: Has anybody ever worked with the Atmel MARC4?

--- End quote ---

Never heard of them. I'll have a look at the DS out of curiosity.

Has anyone ever written assembly for one of the HP Saturn CPUs I mentioned earlier? Those were, at least in my memory, pretty interesting and the assembly was rather nice. I did write routines in assembly on the HP28s and HP48 back in the days.

harerod:
SiliconWizard, after three decades my HP48SX is still in use, albeit rarely. I only ever was a user of other people's low level code (Sokoban...). I used the high level language to write small programs, e.g. transmission line calculations and such.
There are a bunch of emulators available, in case anybody wants to dabble with that architecture.

gnuarm:

--- Quote from: harerod on June 25, 2022, 08:03:57 am ---A bit late to the show, but closer to the original topic: Has anybody ever worked with the Atmel MARC4? I had my eyes on that one for several projects, but its use was never justified by the expected savings. Atmel discontinued this family in 2015.
https://media.digikey.com/pdf/Data%20Sheets/Atmel%20PDFs/T48C510.pdf
Digikey lists several devices as 0 stock / discontinued. Some MCU core with RF interface.

--- End quote ---

I can't say I worked with it.  I did take a hard look at trying to use it, but that was around 10 years ago and even then they were not doing much to support it.  I don't recall ever finding the tools for it.

harerod:
gnuarm, thanks to your comment, I figured out that my interest in MARC4 was over 20 years ago. At that time I was still an inmate at a large American medical devices manufacturer. Paying real money to the manufacturer for the development tools (hard- and software) was much more common then.

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