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From: aburto@marlin.UUCP (Alfred A. Aburto)
Newsgroups: comp.sys.amiga
Subject: Re: 68881 in a 68010 Amiga (question)
Message-ID: <841@marlin.UUCP>
Date: Mon, 17-Nov-86 16:53:09 EST
Article-I.D.: marlin.841
Posted: Mon Nov 17 16:53:09 1986
Date-Received: Tue, 18-Nov-86 03:54:37 EST
References: <535@elmgate.UUCP>
Reply-To: aburto@marlin.UUCP (Alfred A. Aburto)
Organization: Naval Ocean Systems Center, San Diego
Lines: 23
Keywords: Floating Point FPU 68881 68000 68010 Hardware

In article <535@elmgate.UUCP> jdg@elmgate.UUCP (Jeff Gortatowsky) writes:
>
>Please, no responses about how the 020 uses 'cpu space' etc.  I am familiar
>with the 020 and it's co-CPU interface.  I just can't see spending 600
>dollars for the CSA piggy back board (They told me it was going away
>anyways).   Thanks in advance for any information/help/tips you can
>provide.
>
>
I talked to Mr. Chuck Bennett at CSA today about the 'piggy-back boards
going away'.  He said that this was not correct and they are still making
and selling the piggy-back boards.

I don't know much about the 68010/68881/Amiga interface requirements.
However if the 68881 must be treated as a peripheral (like a printer or
serial device) then their are certain procedures to follow (hopefully these
are stated in the Amiga Hardware Manual) inorder to 'add' the device to the
system.  Also the AmigaDOS Exec has functions like _LVOAddDevice which may
be required.  The Amiga hardware device ports and registers are located at
specific fixed addresses starting (I think) at $00BD0000.  It is in this area
that you would want the 68881 hardware port and registers to be located.

Al Aburto