Re: Apple Drops Backward Compatibility for Next MacOS

[matzingr@iclab.ce.philips.nl (Edgar Matzinger)]

In article <54u5ud$7k6@darla.visi.com>,
	nathan@visi.com (Nathan Mates) writes:
> 
>    That 640K problem is a limitation of MS-DOG. With the 286 series of
> chips that could easily address 1MB of ram, Mickeysoft had a perfect
> opportunity to shatter the 640K barrier,... 8<

Hi,

  the 640K problem is a hardware limitation. The memory map shows
these ranges: 0-640K RAM, followed by videoRAM and ROM. If they (IBM)
had build it the other way around: starting with ROM from 0, followed
by videoRAM and user RAM, they'd never any problems.

cu l8r,
-- 
Edgar.

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