Path: utzoo!utgpu!water!watmath!clyde!bellcore!faline!ulysses!allegra!mit-eddie!ll-xn!ames!sdcsvax!ucsdhub!hp-sdd!hplabs!hpcea!hpfcdc!hpfclq!cunniff
From: cunniff@hpfclq.UUCP
Newsgroups: comp.sys.amiga
Subject: A2000 PC-AT slots, and 'Fatso' Agnes
Message-ID: <4230011@hpfclq.HP.COM>
Date: 15 Jan 88 23:18:18 GMT
Organization: Hewlett-Packard
Lines: 35
Posted: Fri Jan 15 18:18:18 1988

Question 1:	With the advent of 16-bit (80286) bridge cards, it will soon
		become desirable to transform the last two PC slots on the
		A2000 into PC-AT slots.  My question is: can the missing
		connectors just be soldered into place, or must some
		resistors/capacitors/etc.  be added as well?

Question 2:	I have heard rumors that C-A is developing a 'Fatso'
		Agnes that will:

			1.  Allow for 400 line non-interlaced displays
			    (on a multi-scan type monitor)
			2.  Allow for more bitplanes (i.e. 7 or 8)
			    than are currently possible.
		
		Now, the memory bandwidth for 320 pixel-wide screens
		exists to do both of the above (since 640 pixel-wide
		screens require twice the bandwidth, and *THEY* work).
		However, it is my understanding that 4 bitplane 640
		pixel-wide screens take up ALL available memory bandwidth
		in chip memory.  Any ideas how an Agnes/Denise/Paula
		replacement could create a 640x400x8 noninterlaced
		screen WITHOUT requiring a significantly faster
		bus and RAM chips?  It seems to me that you would
		have to increase the clock rate to 14 Mhz, and drop
		in 120 or 100 ns RAM chips, in order to get the necessary
		bandwidth.  Am I wrong?  (I'm sure y'all will let me
		know :-> ).  If not, I'll just have to dismiss these
		rumors as entirely bogus, as such changes would probably
		require MAJOR motherboard rework.


				Ross Cunniff
				Hewlett-Packard System Software Operation
				...{ucbvax,hplabs}!hpda!cunniff
				cunniff%hpda@hplabs.ARPA