Date   : Sun, 28 Jun 2009 22:57:17 +0100
From   : adsb@... (Andrew Benham)
Subject: Master 512 boot problem

David Hunt wrote:

> I am trying to boot a Master 512 using a 3.5" floppy. The boot image I am
> using comes from the DosPlus Boot Disc from the BeebEm emulator. I put that
> image onto a 3.5" DD floppy, then booted the 512. On booting, it gets past
> the Digital Research logo and tries to start COMMAND.COM at this point a
> whole bunch of invalid op-code messages come up and then it tells me to
> insert a disc with COMMAND.COM, but then doesn't actually try to read
> anything else from that point on.

How have you formatted the 3.5" disk ?  As I recall, the 5.25" DOS+ boot
disk is a 640k "ADFS L" disk, but the ADFS filesystem doesn't occupy
much of the disk - the rest is a DOS+ filesystem.

I suspect the 3.5" floppy might have to be formatted as 640k.

-- 
Andrew Benham         adsb@...       
Southgate, London N14, United Kingdom

The gates in my computer are AND OR and NOT, not "Bill"