Oddest mismatch in hardware for a given purpose...
jules.richardson99 at gmail.com
Wed Jun 10 07:47:59 CDT 2009
Josh Dersch wrote:
> Internally though, they're 100% different -- the processor in the MK-85
> is a Russian PDP-11 knockoff. It's not a power-efficient CPU by any
> means, so to ensure decent battery life the CPU speed is severely
> limited. Not sure exactly what speed it runs at (anyone out there
> know?) but the result is by far the slowest calculator I've ever used.
That's interesting. Does it have provision for AC input? Just curious if it
auto-magically ups the clock speed when not running from the battery, as that
would be kinda cool (and an early example of a power-saving mode :-)
> (The BASIC implementation is also incredibly buggy, mostly due to poor
> argument checking... see http://www.pisi.com.pl/piotr433/mk85mc1e.htm
> for a cool example of exploiting a bug in INPUT to do machine-language
> coding, in a way only a contortionist could love...)
Gah, one of the home micro BASICs did something similar, so you could throw MC
in there as a character string and 'trick' the BASIC into executing it by
tripping the parser up - but my brain's refusing to tell me which one it was now.
> Anyone else know of examples of odd-duck machines like this, where the
> hardware is probably not the best choice for the application?
Anything ever done using an IBM-compatible PC?
> (But it's cool anyway?)
Oh. Scratch that, then.
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