Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!ucsd!ucbvax!TAURUS.CS.NPS.NAVY.MIL!schweige From: schweige@TAURUS.CS.NPS.NAVY.MIL (Jeffrey M. Schweiger) Newsgroups: comp.sys.amiga.hardware Subject: Re: An open letter to C= Message-ID: <9103170235.AA03868@taurus.cs.nps.navy.mil> Date: 17 Mar 91 02:35:26 GMT References: Sender: daemon@ucbvax.BERKELEY.EDU Organization: Naval Postgraduate School, Monterey CA Lines: 79 In article dhansen writes: >... From what I >recall talking to local dealers when the Enhanced Agnus was released, some >A500s did require additional mods in order to accept the Enhanced Agnus, a few >very old rev. boards were not easy to mod for that, but not until recently >have I heard that the A500 wouldn't accept one. That sounds to be either: >1. A marketing ploy. (I doubt that, CBM has learned that customers aren't so >gulable). >or >2. Another of the rumor mills churning out drivel. > >Perhaps CBM marketing would care to end this thread? I don't believe that anyone from CBM marketing presently reads (or at least posts to) Usenet. I know that modification instructions for the A500 to _activivate_ the 1 meg Agnus have been posted to the net before (don't have it handy at the moment), but I also remember that CBM does not support the modification. I did have a copy of the following post available, which may be of interest. >From: chanson@isis.cs.du.edu (Chris Hanson) Newsgroups: comp.sys.amiga.hardware Subject: Re: help on installing 1meg agnus ... Summary: You may not want to... Keywords: Weird, 1meg, Agnus, Commodore, WARRANTY, Fat, etc. Message-ID: <1990Oct13.035003.3737@isis.cs.du.edu> Date: 13 Oct 90 03:50:03 GMT References: <12411@chaph.usc.edu> Reply-To: chanson@isis.UUCP (Chris Hanson) Organization: Matrix Lines: 39 We (Progressive Peripherals & Software) got a fax the other day from Commodore. No explanation of it has followed, and I presume other dealers and developers got it. (At least, I hope so.) It reads as follows: {---cut here ---} One Megabyte Agnus use in Commodore A500 Computers Commodore Business Machines does not support the One Megabyte addressing feature of the Fat Agnus 8372 IC in A500 Computers. Regardless of the version of Fat Agnus, all A500's have been factory jumper set to be functionall identical. 8370 Fat Agnus chips are used on rev 5 boards with 256K x 1 DRAMS. 8372 Fat Agnus chips are used on rev 6a boards with 256K x 4 DRAMS. The boards are functionall interchangable. Each will support 512K of chip RAM and 512K of expansion RAM with an A501 installed. Enabling the One Megabyte feature, at the customers' request, will void the warranty. Instructions detailing implementation of the One Megabyte addressing have been circulated without Official Approval and Commodore does not assume any liability for damages resulting from this mode of operation in the A500. {---cut here ---} I have retyped it, exactly as it was sent, with all capitalization and page/line formatting intact. You go figure. I don't get it either. Chris - Xenon -- #define chanson Christopher_Eric_Hanson || Lord_Xenon || Kelson_Haldane I work, but you don't know who I work for. And they don't know I'm here. ::I'm @ chanson@nyx.cs.du.edu ------------------------------------------------------------------------------ -- ******************************************************************************* Jeff Schweiger Standard Disclaimer CompuServe: 74236,1645 Internet (Milnet): schweige@taurus.cs.nps.navy.mil *******************************************************************************