Path: utzoo!utgpu!attcan!uunet!lll-winken!lll-tis!helios.ee.lbl.gov!pasteur!ames!oliveb!amiga!jimm
From: jimm@amiga.UUCP (Jim Mackraz)
Newsgroups: comp.sys.amiga
Subject: Re: 1024X800 Monitor
Keywords: How much memory?
Message-ID: <2712@amiga.UUCP>
Date: 2 Aug 88 17:20:34 GMT
References: <1779@vu-vlsi.Villanova.EDU>
Reply-To: jimm@cloyd.UUCP (Jim Mackraz)
Organization: Commodore-Amiga Inc, Los Gatos CA
Lines: 32

In article <1779@vu-vlsi.Villanova.EDU> cheung@vu-vlsi.Villanova.EDU (Wilson Cheung) writes:
)
)	This 1024x800 black and white monitor that Commodore plans to release
)sounds exciting, especially since it will work with my A1000.  However,
)my concern is the amount of CHIP RAM this is going to hog up.  My understanding
)is that it will need eight 640x400, 4-bit plane screens.  Will this hog
)up all 512K of standard CHIP RAM, so that multi-tasking will be out of the
)question?
)					Wilson Cheung

A single 1008x800 screen (USA) takes 100,800 bytes per bitplane.  So, before
you open any smart refresh windows (which use off-screen memory when they
are obscured), a 2 bitplane screen takes over 200,000 bytes.  Not 512,
we note, but a heck of a lot.

A1000 users will probably choose to operate with a 1 bitplane Workbench
screen, or a normal hi-res workbench screen and a single bitplane application
1008x800 screen.  A500 and A2000 users will probably want to upgrade to 
1MB of chip ram.

Without expansion memory, an A1000 will probably be pretty tight using
the A2024, but it can be done.

Your misunderstanding might have arisen from discussions about display
memory bandwidth which compare one of the modes to a 4 bitplane hires
screen.

	jimm
-- 
	Jim Mackraz, I and I Computing	  
	amiga!jimm	BIX:jmackraz
Opinions are my own.  Comments regarding the Amiga operating system, and
all others, are not to be taken as Commodore official policy.