home *** CD-ROM | disk | FTP | other *** search
- Path: seagoon.newcastle.edu.au!alinga!not-for-mail
- From: ougjp@alinga.newcastle.edu.au (Josh Pryor)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: A3000: 32-bit mem appears to be 24-bit?
- Date: 8 Feb 1996 11:16:26 GMT
- Organization: The University of Newcastle
- Message-ID: <4fcm2a$m9p@seagoon.newcastle.edu.au>
- References: <4em5jb$8es@hobbes.compusult.nf.ca> <4f5f0q$404@erinews.ericsson.se>
- NNTP-Posting-Host: alinga.newcastle.edu.au
- X-Newsreader: TIN [UNIX 1.3 950824BETA PL0]
-
- Johan Zeylon IN/SA/BIB (etxzayl@cate1.ericsson.se) wrote:
- :
- : The original Amiga had a 68000 processor with 24 address lines. Therefore
- : the custom chips were designed with 24 address lines too. They can only
- : access the first 16Mb of memory space. Including CHIP RAM, ZorroII
- : expansions (up to 8Mb), motherboard RAM (in 68000 based Amigas) and
- : custom chip registers.
- : The motherboard RAM of the 3000 is located above 16Mb and therefore needs
- : more address lines to be accessed. Likewise ZorroIII expansions can not
- : be accessed by the custom chips.
-
- Was this limitation fixed in AGA? I hope so, sounds like a 640k
- limit for the future:-)
-
- --
- _________________________________________________________________________
-
- JOSHUA PRYOR OUGJP@NET-UNIX.NEWCASTLE.EDU.AU
-
- Every day I feel better and better RG250
- Every day I strive to achieve AMIGA1200T
- Every day I must remember to take my medication
- _________________________________________________________________ ( - -
-
-