🚀 go-pugleaf

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! 

-- 
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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!