Path: utzoo!attcan!uunet!cbmvax!daveh From: daveh@cbmvax.commodore.com (Dave Haynie) Newsgroups: comp.sys.amiga.tech Subject: Re: AmigaOS/UNIX - A Suggestion Message-ID: <16423@cbmvax.commodore.com> Date: 10 Dec 90 22:00:00 GMT References: <16094@cbmvax.commodore.com> <7185@sugar.hackercorp.com> <16325@cbmvax.commodore.com> <1990Dec6.191222.12243@ericsson.se> <598@amix.commodore.com> Reply-To: daveh@cbmvax.commodore.com (Dave Haynie) Organization: Commodore, West Chester, PA Lines: 24 In article jita@polaris.utu.fi (Marko Katajisto) writes: >In article <598@amix.commodore.com> ford@amix.commodore.com (Mike "Ford" Ditto) writes: >PS. Any ideas how to break this annoying 4 meg barrier on this board, maybe >Dave Haynie could hack out a replacement of these 1 mb chips to 4 mb chips? For the A2620, its possible to replace the memory decoding PAL with one that allows you to move the 4 Megs of 32 bit memory from being autoconfigured to sitting fixed at $01000000. There's no simple way to get more addressing on the A2620 without some serious hacking to it, since the extra address lines needed don't go anywhere, etc. So you can have more 16bit RAM, but no more 32 bit RAM. Maybe if I had the 4MB DRAM specs back then I would have thrown something in. The A2630 doesn't support this relocation, though it does in theory have this daughterboard support, should someone ever feel inclined to build such a device. The current board would need about as much hacking for 4MB DRAM support as the A2620. >Jita - Marko Katajisto University of Turku Department of Computer Science -- Dave Haynie Commodore-Amiga (Amiga 3000) "The Crew That Never Rests" {uunet|pyramid|rutgers}!cbmvax!daveh PLINK: hazy BIX: hazy Wheeeeeeeeeeeeeeee...........