Subject: Re: 501-1105 FPA
To: Jason R Thorpe <>
From: Miod Vallat <>
List: port-sun3
Date: 01/07/2001 16:38:58
> I honestly don't know, as I never had one, but it MUST be faster, or
> else they wouldn't have sold it :-)  I'll try to find a day to go out
> to my storage place and hunt though my wall of Sun manuals (I think I
> still have them) -- there might be a Sun3 FPA board manual in there.

The ``Floating-Point Programmer's Guide for the Sun Workstation'' manual
would be a good start.

Under SunOS, you would compile your program with -ffpa to instruct the
compiler to generate FPA code instead of 68881 code. Then, it would, at
runtime, open and mmap /dev/fpa to have access to the board. By reading
or writing at several memory address starting from 0xe0000000, you would
trigger the wanted fpa instructions.