Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!fernwood!portal!cup.portal.com!-Rich- From: -Rich-@cup.portal.com (Richard Sherman Payne) Newsgroups: comp.sys.apple2 Subject: Re: Apple IIGS's Memory Limit Message-ID: <43521@cup.portal.com> Date: 21 Jun 91 04:44:58 GMT References: <9106191921.AA23636@apple.com> Organization: The Portal System (TM) Lines: 32 >On Tue, 18 Jun 1991 20:20:04 GMT Lyle Gray said: >>>The on-board RAM lies within the 8MB space. >> >>I seem to recall (from the original owner's manuals) that the RAM limit was >>8.25 Mb, not 8 Mb. The remaining addressable space (up to 16 Mb) was reserve d >>for ROM expansions. > >It's actually 8.388608MB, but that's considered '8MB'. Just like, 1k is reall y >1024 bytes and 1MB is really 1 million plus 24kb. >>-------------------------------------------------------------------------- >>Lyle H. Gray Internet (personal): gray@cs.umass.edu >>Quodata Corporation Phone: (203) 728-6777, FAX: (203) 247-0249 > This is a little mixed up as I understand things. The addressable space is 2^23= 8,338,608 bytes. Since 1K = 1024 bytes, we have 8,388,608/1024 = 8,192 KB. By common usage, this is called 8MB. Now 8.338608 MB would be 8.338608 * 1024 = 8,589.93 KB, which is about 400K over 2^23 bytes. The error seems to be dividing by 1000 to convert from 8,338,608 in converting from bytes to MB. A common mistake to those not computer literate. But I am surprised to see it here. Rich -Rich-@cup.portal.com