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From: ford@amix.commodore.com (Mike "Ford" Ditto)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: A3000UX and chip memory...
Message-ID: <1037@amix.commodore.com>
Date: 8 Feb 91 20:23:50 GMT
References: <3899@ryn.mro4.dec.com>
Followup-To: comp.unix.amiga
Organization: Commodore-Amiga Unix Development
Lines: 27

mcafee@elmst.enet.dec.com (Steve McAfee) writes:
> Can anyone describe how chip memory is used by Amiga UNIX (SVR4)?
> 
> How are the custom chips being used (if at all)?

Things like this are being discussed in comp.unix.amiga.

For example, in <796@amix.commodore.com>, I wrote:
> Also, remember that experienced AmigaDos users (and probably Commodore
> marketing types, too) think of a basic A3000 (4 Meg fast, 1 Meg chip)
> as a "5 Meg" system, while Unix consideres this to be a "4 Meg"
> system.
> 
> The Amiga's "chip" memory, to Unix, is like the frame buffer memory on
> a graphics card.  It is never used for the system's virtual memory.
> It is used for floppy and sound DMA, copper instructions, and
> (primarily) bitplane memory for the many virtual screens.

This isn't a particularly hardware-intensive topic, so I'm redirecting
followups to comp.unix.amiga.

					-=] Ford [=-

"But everybody wants a rock		(In Real Life:  Mike Ditto)
 to wind a piece of string around."	ford@amix.commodore.com
 - They Might be Giants,		uunet!cbmvax!ditto
   "We want a rock"			ford@kenobi.commodore.com