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From: r90p@jupiter.sun.csd.unb.ca (Schultz)
Newsgroups: comp.sys.atari.st,comp.sys.atari.st.tech
Subject: Re: ST Disks & Sparcstation Drives
Message-ID: <1991Mar21.045427.5970@jupiter.sun.csd.unb.ca>
Date: 21 Mar 91 04:54:27 GMT
Article-I.D.: jupiter.1991Mar21.045427.5970
References: <1991Mar20.193859.11943@m.cs.uiuc.edu>
Organization: University of New Brunswick, Fredericton
Lines: 118

>
>	A few months ago, some people were talking about reading Atari
>	ST disks from a Sparcstation.  Does anyone know how to go about
>	this?
>
>	Specifically, I want to read files from a double sided disk onto
>	my Sparc and then transfer them to my ST hard disk via modem (I
>	only have a single-sided floppy).

From Mtools 2.03, patch #3:

# Mtools was posted to the unix-pc.sources news group (and mailed to the
# moderator of comp.sources.unix) on the 17th of September 1990.  Since
# then, patch #1 and #2 have been posted to unix-pc.sources,
# comp.sources.bugs, and emailed to Rich Salz.
# 
# In addition, the current version of Mtools and all the patches are
# available via anonymous ftp from cerl.cecer.army.mil (129.229.1.101).
# 
# Emmet P. Gray                           US Army, HQ III Corps & Fort Hood
# ...!uunet!uiucuxc!fthood!egray          Attn: AFZF-DE-ENV
# fthood!egray@uxc.cso.uiuc.edu           Directorate of Engineering & Housing
#                                         Environmental Management Office
#                                         Fort Hood, TX 76544-5057

Just a few days ago, I modified Mtools so that they can read
and (be careful!) write single sided 3.5" floppies and e.g.
floppies with 10 sec/track:

---------------------------- < cut here > -------------------------
*** devices.c_as_distrubuted	Mon Mar 11 17:39:48 1991
--- devices.c	Mon Mar 11 17:41:34 1991
***************
*** 27,37 ****
  #endif /* MASSCOMP */
  
  #ifdef SPARC
  struct device devices[] = {
! 	{'A', "/dev/rfd0c", 0L, 12, 0, (int (*) ()) 0, 80, 2, 18},
! 	{'A', "/dev/rfd0c", 0L, 12, 0, (int (*) ()) 0, 80, 2, 9},
  	{'\0', (char *) NULL, 0L, 0, 0, (int (*) ()) 0, 0, 0, 0}
  };
  #endif /* SPARC */
  
  #ifdef UNIXPC
--- 27,94 ----
  #endif /* MASSCOMP */
  
  #ifdef SPARC
+ #include <sys/types.h>
+ #include <sun/dkio.h>
+ #include <fcntl.h>
+ 
+ int init_sparc_fd();
+ 
  struct device devices[] = {
! 	{'A', "/dev/rfd0c", 0L, 12, 0, init_sparc_fd, 80, 2, 0},
  	{'\0', (char *) NULL, 0L, 0, 0, (int (*) ()) 0, 0, 0, 0}
  };
+ 
+ /*
+  * Stuffing back the floppy parameters into the driver
+  * allows for gems like 10 sector or single sided floppies
+  * from Atari ST systems.
+  * Also the table needs only one entry (SunOS already tries
+  * for HD and DD floppies).
+  * Note that it is necessary to set the partition info,
+  * since otherwise e.g. a 800k floppy (80 tr., 2 heads, 10 sectors)
+  * would only be read and writeable up to 720k.
+  * 
+  * Martin Schulz, Universite de Moncton, March 11, 1991.
+  */
+ int
+ init_sparc_fd(fd, ntracks, nheads, nsect)
+ int fd, ntracks, nheads, nsect;
+ {
+ struct fdk_char dkbuf;
+ struct dk_map   dkmap;
+ 
+ 	if (ioctl(fd, FDKIOGCHAR, &dkbuf) != 0) {
+ 		ioctl(fd, FDKEJECT, NULL);
+ 		return(1);
+ 	}
+ 
+ 	if (ioctl(fd, DKIOCGPART, &dkmap) != 0) {
+ 		ioctl(fd, FDKEJECT, NULL);
+ 		return(1);
+ 	}
+ 
+ 	if ( ntracks && nheads )
+ 		dkbuf.ncyl	= ntracks * nheads;
+ 	if ( nheads )
+ 		dkbuf.nhead	= nheads;
+ 	if ( nsect )
+ 		dkbuf.secptrack = nsect;
+ 
+ 	if ( ntracks && nheads && nsect )
+ 		dkmap.dkl_nblk  = ntracks * nheads * nsect;
+ 
+ 	if (ioctl(fd, FDKIOSCHAR, &dkbuf) != 0) {
+ 		ioctl(fd, FDKEJECT, NULL);
+ 		return(1);
+ 	}
+ 
+ 	if (ioctl(fd, DKIOCSPART, &dkmap) != 0) {
+ 		ioctl(fd, FDKEJECT, NULL);
+ 		return(1);
+ 	}
+ 
+ 	return(0);
+ }
  #endif /* SPARC */
  
  #ifdef UNIXPC
---------------------------- < cut here > -------------------------

Replies to:                 Martin Schulz
                            martin@atlantic.cs.unb.ca