Oddest mismatch in hardware for a given purpose...

[Dave McGuire]

On Jun 10, 2009, at 9:26 AM, Cameron Kaiser wrote:
>>>> (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.
>>
>>    This is a pretty common trick on the ZX81/TS-1000.  You'd embed
>> machine code into a REM statement at the top of a program, as a
>> string of characters.  It was a real bitch to enter that stuff from
>> magazines. :-)
>
> Right, you could do this on a C64 also and probably many machines,  
> but this
> was just a convenient means of storage -- execution of arbitrary ML  
> was
> still permitted by the interpreter.  The MK-85 hack is noteworthy  
> because it
> allows you to run stuff on the CPU even though the BASIC supposedly  
> doesn't
> let you (no CALL, SYS, USR(), etc).

   OH!  Oh yes, I see what you mean.  Different trick entirely.  Very  
cool.

          -Dave

-- 
Dave McGuire
Port Charlotte, FL