IBM ROM BASIC or lack thereof - test-drb@ccmp.vtda.org

25 Oct 2001

On Oct 25, 10:30, Ethan Dicks wrote:
...

 --- Tony Duell &lt;ard(a)p850ug1.demon.co.uk&gt; wrote:
  On several occasions I asked for 'An ST506
interface hard disk of about
 50Mbytes' and had to explain what I meant... 
 Yes, but how many heads did it have?  Was it an ST506-interface drive
 or an ST412-interface drive?  It's being pedantic, but there is a
 single-line difference.  One could imagine a controller that could
 handle a real ST-506 but not a real ST-412 drive.  AFAIK, by the time
 PCs supported the ST-225, it was a moot point, but pre-PeeCee controllers
 might not be happy. 
Or the other way around; IIRC most ST-412 style drives would accept slow
step pulses.  I have an ST-506 style drive that won't work on almost any
controller I have because it can't keep up with fast step pulses that an
ST-412 would buffer.
--
Pete                                            Peter Turnbull
                                                Network Manager
                                                University of York