scalos/Modules/FormatDisk.Gadtools/NSD_64bit.c

   1 // NSD_64bit.c
   2 // $Date$
   3 // $Revision$
   4 // $Id$
   5
   6
   7 #include <exec/exec.h>
   8 #include <devices/newstyle.h>
   9 #include <proto/exec.h>
  10
  11 BOOL checkfor64bitcommandset(struct IOStdReq *io)
  12 {
  13         // struct IOStdReq io = { };
  14
  15         struct NSDeviceQueryResult nsdqr;       // +jmc+ { } ??;
  16         LONG error;                             // +jmc+ = 0
  17         // BOOL newstyle = FALSE;
  18         BOOL does64bit = FALSE;
  19         UWORD *cmdcheck;
  20
  21         // newstyle = FALSE;
  22         nsdqr.SizeAvailable  = 0;
  23         nsdqr.DevQueryFormat = 0;
  24
  25         io->io_Command = NSCMD_DEVICEQUERY;
  26         io->io_Length  = sizeof(nsdqr);
  27         io->io_Data    = (APTR)&nsdqr;
  28         error = DoIO((struct IORequest *)io);
  29         if ((!error) && (io->io_Actual >= 16) &&
  30                 (nsdqr.SizeAvailable == io->io_Actual) &&
  31                 (nsdqr.DeviceType == NSDEVTYPE_TRACKDISK))
  32                 {
  33                 // Ok, this must be a new style trackdisk device
  34                 // newstyle = TRUE;
  35
  36                 // Is it safe to use 64 bits with this driver? We can reject
  37                 // bad mounts pretty easily via this check!
  38
  39                 for(cmdcheck = nsdqr.SupportedCommands; *cmdcheck; cmdcheck++)
  40                 if(*cmdcheck == NSCMD_TD_READ64)
  41                         does64bit = TRUE;
  42                         // This trackdisk style device supports the complete
  43                         // 64 bit command set without returning IOERR_NOCMD!
  44                 }
  45         return(does64bit);
  46 }