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From: dan@rna.UUCP
Newsgroups: comp.graphics,comp.sys.mac,comp.sys.amiga
Subject: Ikonas/Adage MPC 68000 floating point (68881) ?
Message-ID: <616@rna.UUCP>
Date: Tue, 24-Mar-87 23:27:08 EST
Article-I.D.: rna.616
Posted: Tue Mar 24 23:27:08 1987
Date-Received: Thu, 26-Mar-87 06:44:58 EST
Organization: Rockefeller Neurobiology
Lines: 30
Xref: utgpu comp.graphics:408 comp.sys.mac:1963 comp.sys.amiga:2993


	The Ikonas is a raster graphics system. One of its options is a
68000 processor that can handle peripherals, etc. (It, it is told, can
even run UNIX, anybody do that ?) We wish to enhance the functionality
of this 68000 option:

	- Has anyone ever put a 68881 floating point chip on the Ikonas 68000 ?
If so, how ? What is the suitability of the Apple MacIntosh and Amiga CPU
enhancements, such as the piggy back 68881 or the 68020 clip-ons ? How machine
and firmware specific are they ?

	- Has anyone cranked up the speed of the Ikonas 68000 ? It is currently
a 8Mhz chip. Could we put in a 12Mhz, perhaps by changing the memory chips to
90ns ?

	- We currently use the SUMACC C compiler to write programs for the
Ikonas 68000. If we succeed in putting on a 68881, is there a version of the
SUMACC or MIT C compiler which can generate code for the 68881 ? Any other
compiler suggestions (perhaps the GNU C compiler) ?

	Thanks.
					Cheers,
					Dan Ts'o
					Dept. Neurobiology
					Rockefeller Univ.
					1230 York Ave.
					NY, NY 10021
					212-570-7671
					...cmcl2!rna!dan
					rna!dan@cmcl2.arpa