Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!marque!lakesys!rich
From: rich@lakesys.UUCP (Richard Dankert)
Newsgroups: comp.sys.atari.st
Subject: Re: ST 4 meg limit
Message-ID: <547@lakesys.UUCP>
Date: 15 Apr 89 02:23:52 GMT
References: <5271@cs.Buffalo.EDU>
Reply-To: rich@lakesys.UUCP (Richard Dankert)
Organization: Lake Systems - Milwaukee, Wisconsin
Lines: 25

In article <5271@cs.Buffalo.EDU> ugbernie@cs.Buffalo.EDU (Bernard Bediako) writes:
>
>Will Tos 1.4 allow the ST to use more than 4 megs of memory (that IS all it can
>address right?).  Also, is MINIX limited to 4 megs?  It doesn't use Tos.
>Or is the 4 meg limit set in the hardware?
>				thanks
>			bernie
>
>Bernard Bediako  --------=-=-=-=-=->	DOMAIN:	ugbernie@cs.buffalo.edu
>"You CAN have your cake and eat it!"


	I don't belive that TOS or GEM have anythingto do with it. What it
boils down to is the MMU (Memory Management Unit) or better yet, the
MCU ( Memory Control Unit) that is the problem. It can only address two 
banks of ram. Now when the 16 MegaBit Dram that I had heard was developed in
Japan (?) comes around at a reasonable price, one bank would equal 16 Meg.

	TOS has (had?) a limit of 16 Meg, and GEM had a limit of 32 Meg.

Last I knew the 16 Meg Hard drice barrier had been broken in TOS 1.4, thus
allowing partitions to be 32 MEG, besides other nice fixes/enhancements.

rich.....
UUCP: rich@lakesys.lakesys.COM     {always .... }