Date   : Sun, 08 Sep 1991 23:05:23 GMT
From   : cis.ohio-state.edu!zaphod.mps.ohio-state.edu!qt.cs.utexas.edu!yale.edu!ira.uka.de!sun.rhrk.uni-kl.de!uklirb!posthorn!posthorn.informatik.uni-kl.de!radest@ucbvax.Berkeley.EDU (Guenter Radestock (Gast Reithermann))
Subject: How to do Sector I/O in CP/M+ (???)

I am in the way of porting a few programs from CP/M 2.2 to CP/M+ and
have no access to CP/M+ manuals.  I tried to do sector or record I/O in
CP/M+ but couldn't get it to work. 

I know
-      how to call the BIOS with a BIOSPB ...
-      that the BIOS READ and WRITE do physical, not logical I/O
-      that the SECTRAN call translates from logical to physical

I don't know
-      how exactly to call SECTRAN
-      how to determine the physical sector size
-      why I didn't manage to get ANY read to work yet 
       (Track0, Sector1 should work even if my assumptions 
       on Sector numbers are wrong)
-      what happened to the deblocking flags from CP/M2.2
-      if (maybe) there are new flags in CP/M3

Any help will be appreciated.

- Guenter                      Please don't flame me for my bad english.
                               this is my first post to this group.