Path: utzoo!attcan!uunet!aplcen!haven!udel!sbcs!ameristar!rick
From: rick@ameristar (Rick Spanbauer)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Blit Wanted
Message-ID: <1990Jun3.164446.12193@ameristar>
Date: 3 Jun 90 16:44:46 GMT
References: <2888@crash.cts.com> <1032@mpirbn.UUCP> <2984@crash.cts.com>
Distribution: comp
Organization: Ameristar Technology, Inc
Lines: 19

In article <2984@crash.cts.com> jcs@crash.cts.com (John Schultz) writes:
>faster than the blitter.  Until we see a 34020 or equivalent for the Amiga,
>we can dust the blitter with the 32 bit processor for polygon fills.

	The 34020 or even the 860 alone is not enough to do
	realtime 3D graphics without additional support hardware.  The 860	
	bus for example only does about 160 mByte/sec - consider that
	to update a 1024x768x24 bit screen at even 30 hz takes about
	71 mBytes/sec.  That is 71 mByte/sec just into the frame buffer,
	neglecting completely instruction path traffic, processing time, 
	etc.  I've been told that the 34020 can fill at only about
	250 mBit/sec, so the time required to fill a 1024x768x24 display
	is 1024*768*24/250x10^6 = ~75 mS (or about 13 fps max), again
	neglecting insn fetch, processing time, etc.  
	
>  John

				Rick Spanbauer
				Ameristar