#include "exec/exec.h"
#include "exec/nsd.h"
#include "clib/exec_protos.h"

BOOL checkfor64bitcommandset(struct IOStdReq *io)
    {
//   struct IOStdReq io = { };
	struct NSDeviceQueryResult nsdqr = { };
	LONG error = 0;
	BOOL newstyle = FALSE;
	BOOL does64bit = FALSE;
	UWORD *cmdcheck;

	nsdqr.SizeAvailable  = 0;
	nsdqr.DevQueryFormat = 0;

	io->io_Command = NSCMD_DEVICEQUERY;
	io->io_Length  = sizeof(nsdqr);
	io->io_Data    = (APTR)&nsdqr;
	error = DoIO((struct IORequest *)io);
	if ((!error) && (io->io_Actual >= 16) &&
		(nsdqr.SizeAvailable == io->io_Actual) &&
		(nsdqr.DeviceType == NSDEVTYPE_TRACKDISK))
		{
		/* Ok, this must be a new style trackdisk device */
		newstyle = TRUE;

		/* Is it safe to use 64 bits with this driver? We can reject */
		/* bad mounts pretty easily via this check! */
		for(cmdcheck = nsdqr.SupportedCommands; *cmdcheck; cmdcheck++)
			if(*cmdcheck == NSCMD_TD_READ64)	does64bit = TRUE;
				/* This trackdisk style device supports the complete */
				/* 64 bit command set without returning IOERR_NOCMD! */
		}
	return(does64bit);
	}