home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!comp.vuw.ac.nz!canterbury.ac.nz!equinox.gen.nz!equinox!bignode!pete
- From: pete@bignode.equinox.gen.nz (Pete Moore)
- Subject: Re: Installing Fatter Agnus
- Newsgroups: comp.sys.amiga.hardware
- References: <Bz9qE7.Exv@cda.mrs.umn.edu>
- Organization: Equinox Networks
- Reply-To: pete@bignode.equinox.gen.nz
- Distribution: comp.sys.aiga.hardware
- X-Newsreader: TIN [version 1.1 PL8]
- Message-ID: <pete.03i7@bignode.equinox.gen.nz>
- Date: 16 Dec 92 08:11:38 +1200
- Organization: Equinox Networks
- Lines: 34
-
- Scott Carlson (carlsosd@cda.mrs.umn.edu) wrote:
-
- >I recently installed the Fatter Agnus in my Amiga 2000, older version
- >motherboard 4.X or something like that. Does anyone out there know what
- >, beyond just swapping the Fatter Agnus for the Fat Agnus, needs to be
- >done inorder to realize the full 1 Meg of Chip RAM.
-
- (I also mailed this to Scott)
-
- You also need to:
-
- 1. Find Jumper J101 located on the lower right side of the power
- connector CN400. It consists of 3 posts - 2 of the posts are
- shorted together using a shorting block. Remove the shorting block
- and move it to the left, towards the power connector. For further
- info, see Page 13 of the A2000 system schematics - this jumper
- will enable address line 19 from the 68000 which controls the 1
- meg address range.
-
- 2. Locate and cut Jumper pad J500 (to the lower left of the 8520 at
- U301). This is a 2-pad jumper with a trace connecting the two
- pads. See Page 9 of the A2000 system schematics - cutting this
- trace keeps the _EXRAM signal from being tied to ground.
-
- 3. Finally, to enable PAL rather than NTSC - locate and cut J102,
- NOT J201 as suggested in some docs. This is the equivalent of
- bending pin 41 of Agnes in the A500 mod.
-
- --
- +------------------- pete@bignode.equinox.gen.nz -------------------+
- | The effort to understand the universe is one of the very few things |
- | that lifts human life above the level of farce, and gives it some |
- | of the grace of tragedy - Steven Weinberg |
- +---------------------------------------------------------------------+
-