[net.micro.cpm] May I boot from drive B. Please? Pretty please?

jeffj@sfmin.UUCP (J.S.Jonas) (12/18/85)

[when in doubt, pip it!]

	When CP/M boots, it considers the drive that it booted from A:
and starts with with the A> prompt.  Can I corece it into believing
it booted from B:, and how?
	One may ask "why", and I haven't a complete answer.  I am
puzzling over how to handle a system with a SSDD and a DSDD drive.
Normally I boot from the SSDD, but if that boot is bad, I would want to
boot from the DSDD.  Unfortunately, the boot ROM looks only for device 0
so I have to change the drive addresses and will probably confuse
CP/M (watta you mean drive 0 is single sided? It was double sided when
I booted!).

	My solution for now is to logically define the double sided drive
as B: double sided and D: single sided.  This way, I can copy
A: (the single sided drive) to D: and use the disk in drive A:.
I just have to keep enough backups of the single sided system disk
to keep out of trouble.

	Thanks in advance.
				Jeff 'how did I get into this' Skot
				{ihnp4 | allegra | mcnc} attunix ! jeffj

tom@utcsri.UUCP (Tom Nadas) (12/20/85)

Depends on your computer.  On the Osborne 1, hitting " (i.e, shift-
double quote) will boot from B.  On the Osborne Executive and Vixen,
hitting Tab instead of <cr> will boot from B.  don't know about other
brands.

RJS in Toronto
c/o
-- 

					Tom Nadas

UUCP:   {decvax,linus,ihnp4,uw-beaver,allegra,utzoo}!utcsri!tom
CSNET:  tom@toronto

Ghenis.pasa@XEROX.ARPA (12/20/85)

On an Osborne-1 if you hit " (double quote) at boot time the system will
think that a: is b: and viceversa, hence booting from the physical b:
drive (you still get the a> prompt)