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From: billsey@agora.UUCP (Bill Seymour)
Newsgroups: comp.sys.amiga
Subject: Re: New Agnus
Message-ID: <1692@agora.UUCP>
Date: 14 Nov 89 02:39:55 GMT
References: <4710@abaa.UUCP:
Organization: Advanced Solutions, Hillsboro, OR
Lines: 65

From article <4710@abaa.UUCP:, by esker@abaa.uucp (Lawrence Esker):
: In article <3755@nigel.udel.EDU: new@udel.edu (Darren New) writes:
::I think the original question was how to detect the presence
::of an "uninstalled" New Agnus. Obviously, if the New Agnus is
::properly installed then you will boot with more than 512K 
::of CHIP ram.  But what if the new agnus is in a machine that
::originally had the old agnus in it but had the old agnus pulled
::and the new agnus inserted without any other changes?  How does one
::detect that?    -- Darren
: 
: Since there are many people not answering the original question, I will try
: again.  The only way I know is to inspect the part number of the Agnus chip.
: There should be a 4 digit number that (If I remember right) is 873x.  Where
: x is
: 
:     0   Original NTSC agnus
:     1   Original PAL agnus
:     2   New Super Fat agnus, NTSC and PAL.
: 
: The board has jumpers to select the PAL or NTSC mode at powerup, inform the
: agnus chip to use the extra 512 k, and change the memory from $C00000 to
: $080000.

	There is also a PD program out there which correctly finds both
Super Agnus and Super Denise. It's called 'SI' and it comes from Bill Barton
(of MIDI.library fame.) Here's an example of the output...

System Information v2.0b
Kramden Utilities (c) 1988,1989 Pregnant Badger Software

            Computer Name:  Amiga
         Operating System:  Kickstart v34.5, Workbench v34.28
           Main Processor:  Motorola 68000
          Math Peripheral:  Motorola 68881
 Vertical Blank Frequency:  60Hz
   Power Supply Frequency:  60Hz
             Custom Chips:  Super Agnus, Super Denise
               Video Mode:  NTSC
      Normal Display Size:  640 x 200
     Maximum Display Size:  466 x 262
       Pixel Aspect Ratio:  1:1.166

Memory List:
                                                 
     Address Range     Pri   Attr  Size  Description
  $00200020-$009FFFFF   +0  $0005  8.0M  expansion ram
  $000008E8-$000FE7FF  -10  $0003  1.0M  Chip Memory
                                                      
Computing Performance relative to:
                                                      
                   A1000  IBM/XT
         Integer:   1.8     5.8
  Floating Point:   3.2    24.2

	(BTW, I've got a Processor Accelrator with 68881, that's why the
performance shows high...)

: ---------- Lawrence W. Esker ----------  Modern Amish: Thou shalt not need any
:                                          computer that is not IBM compatible.
: UseNet Path: __!mailrus!sharkey!itivax!abaa!esker  ==  esker@abaa.UUCP
-- 
     -Bill Seymour             ...tektronix!reed!percival!agora!billsey
                               ...tektronix!sequent.UUCP!calvin!billsey
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