Path: utzoo!attcan!uunet!comp.vuw.ac.nz!am.dsir.govt.nz!dsiramd!actrix!geoff From: geoff@actrix.co.nz (Geoff McCaughan) Newsgroups: comp.sys.amiga.tech Subject: Re: New owner(s) seek advice Message-ID: <1990Jul12.002129.20964@actrix.co.nz> Date: 12 Jul 90 00:21:29 GMT References: <2255@expya.cs.exeter.ac.uk> Organization: Actrix Public Access UNIX, Wellington, New Zealand Lines: 33 In article <2255@expya.cs.exeter.ac.uk> paul2@cs.exeter.ac.uk writes: > >He's a hardware person and I'm more software. He took one look at the >512K ram expansion and declared 'I can do that'. Looking at the >schematics it seemed that you could decode up to 8M from the underside >'trapdoor' slot (or whatever its called). Is this correct?? Has anyone > There is only 1M decoded directly on the chip bus (and 512k of that is in use already) so there is only 512k available directly from the expansion bay. You _could_ put more RAM there, but you'd need extra address decoding which means access to the 68000 address bus, which is not available on that port. >I've got an 80 track D-Sided 5 1/4" drive I used with my BBC. I'd like >to hook it up as a drive for MSDOS discs. A couple of questions (a) is >this drive suitable? (b) do I need to run it from the Amy's power >supply (i.e. from the disc expansion port). (NB the drive already has >a built in power supply, but perhaps there is some reason why I need >to power the drive from the Amy) > This drive will work (with the correct interfacing) and can be used for AmigaDos and/or MS-DOS assuming you use MSH or some other means of accessing the MS-dOS filesystem. There is no need to power it from the Amiga (in fact the Amiga may net be able to supply enough power) - use the drives own power supply. Happy Hacking! -- ------------------------------------------------------------------------------- Geoff McCaughan Email: geoff@actrix.co.nz Phone: +64 3 539545 or 852101 Amiga/Hardware/Unix/Quantum Mechanics Hacker Phax : +64 3 539567 "Anarchy: Think of it as evolution in action." ^ NEW ZEALAND!