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Path: utzoo!mnetor!seismo!brl-adm!rutgers!cbmvax!grr
From: grr@cbmvax.cbm.UUCP (George Robbins)
Newsgroups: comp.sys.amiga
Subject: Re: moves,movec and the 68010/68881
Message-ID: <1011@cbmvax.cbmvax.cbm.UUCP>
Date: Thu, 20-Nov-86 01:21:34 EST
Article-I.D.: cbmvax.1011
Posted: Thu Nov 20 01:21:34 1986
Date-Received: Thu, 20-Nov-86 22:30:50 EST
References: <536@elmgate.UUCP>
Reply-To: grr@cbmvax.UUCP (George Robbins)
Organization: Commodore Technology, West Chester, PA
Lines: 21
Keywords: FPU Assembly 68020 68010 68881 stupidity(mine)

In article <536@elmgate.UUCP> jdg@elmgate.UUCP (Jeff Gortatowsky) writes:
>
>Does anyone know if the Amiga will/won't go crazy when it sees 'Cpu Space'
>on the function code pins?   I seem to remember something about IACK being
>renamed to 'CPU Space' with the 020.  Then the 020 use Ax-Ax on the address
>bus to specify Cpu Space/Iack/BreakPoint etc.   Any comments, good or
>otherwise?
>
>Jeff Gortatowsky       {allegra,seismo}!rochester!kodak!elmgate!jdg

The function code pins do not connect to anything on the A1000 board, however
they do appear on the expansion connector.  As mentioned in another posting,
the A1000 simulates auto-vector by reading the interrupt identifiers from the
ROM address space, so there is no special decode for the IACK state, just the
address the 68000 is specified to put out on the address bus during an int
acknowledgment cycle.

-- 
George Robbins - now working for,	uucp: {ihnp4|seismo|rutgers}!cbmvax!grr
but no way officially representing	arpa: cbmvax!grr@seismo.css.GOV
Commodore, Engineering Department	fone: 215-431-9255 (only by moonlite)