Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

Elektronika MK-61

elektronika.su

Post reply on HN
Print view View original

21–26 of 26 posts

Re: Elektronika MK-61

#21

Post by egorfine »

rmrfchik wrote: post #19

Heh. Had one. I overclocked my calculator by installing lower resistor (like 1MOhm to 250k, don't remember actual values). It sure was brilliant back then. Numbers were expressed in scientific notation and despite there were only 2 digits for order, actually calculator was capable to calculate up to 10^999. Number greater 10^99 were displayed as "ERROR" (in 7 segment it was 'ЕГГОГ'), but if you lower order you can ge…

3ГГ0Г!! Oh this brings back memories from my MK-52 :-)

Re: Elektronika MK-61

#22

Post by p_l »

tgv wrote: post #18
masswerk wrote: post #6

Also have a look at the MK-90 (1988), its processor is a PDP-11 on a chip and it runs DEC BASIC. https://elektronika.su/en/calculators/elektronika-mk-90/

Wow, that's amazing overkill. I'd love to play with it.

It's arguably a continuation of MK-85, which if you go mad with soldering could be upgraded with enough RAM and disk to run UNIX V6 or V7 - as the pocket "programmable calculator" had essentially MicroPDP-11/73 or MicroPDP-11/83 on a chip, including the MMU.

And the CPUs weren't clones, they were in-house design by Elektronika that had to adapt by decree to supporting PDP-11 instruction set and Q-bus.

Re: Elektronika MK-61

#23

Post by jonathanstrange »

I have an MK-52, which I bought a few years ago very cheaply from an Ukrainian vendor on Ebay. It's interesting because it's programmable and even has a hardware expansion slot (although those expansions are hard to get). However, the keys are a disappointment, they're quite mushy.

Re: Elektronika MK-61

#24

Post by joeman1000 »

Cool website! I bought one of these for a pittance about 5 years ago on eBay. Came from Ukraine as ‘new old stock’, with the old manuals and everything. A time capsule! Unfortunately this thing has the worst buttons I’ve ever pressed. I’ll buy any RPN calculator I come across though.

Re: Elektronika MK-61

#25

Post by jkaljundi »

p_l wrote: post #22
tgv wrote: post #18

Earlier quoted context omitted.

Wow, that's amazing overkill. I'd love to play with it.

It's arguably a continuation of MK-85, which if you go mad with soldering could be upgraded with enough RAM and disk to run UNIX V6 or V7 - as the pocket "programmable calculator" had essentially MicroPDP-11/73 or MicroPDP-11/83 on a chip, including the MMU. And the CPUs weren't clones, they were in-house design by Elektronika that had to adapt by decree to supporting PDP-11 instruction set and Q-bus.

Loved my MK-85, did a lot of BASIC programming on it as a kid. Using pixel graphics you could do even games. I think the demo game it came with was horce racing jumping over fences.
Post reply on HN