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- ;/* io_example.c - Execute me to compile me with Lattice 5.04
- LC -b1 -cfistq -v -y -j73 io_example.c
- Blink FROM LIB:c.o,io_example.o TO io_example LIBRARY LIB:LC.lib,LIB:Amiga.lib
- quit
- */
-
- /* IO_Example.c - an example of exec device IO using the trackdisk device
- * Requires use of ANSI function prototypes.
- *
- * Copyright (c) 1990 Commodore-Amiga, Inc.
- *
- * This example is provided in electronic form by Commodore-Amiga, Inc. for
- * use with the 1.3 revisions of the Addison-Wesley Amiga reference manuals.
- * The 1.3 Addison-Wesley Amiga Reference Manual series contains additional
- * information on the correct usage of the techniques and operating system
- * functions presented in this example. The source and executable code of
- * this example may only be distributed in free electronic form, via bulletin
- * board or as part of a fully non-commercial and freely redistributable
- * diskette. Both the source and executable code (including comments) must
- * be included, without modification, in any copy. This example may not be
- * published in printed form or distributed with any commercial product.
- * However, the programming techniques and support routines set forth in
- * this example may be used in the development of original executable
- * software products for Commodore Amiga computers.
- * All other rights reserved.
- * This example is provided "as-is" and is subject to change; no warranties
- * are made. All use is at your own risk. No liability or responsibility
- * is assumed.
- */
-
- #include <exec/types.h>
- #include <devices/trackdisk.h>
- #include <libraries/dos.h>
-
- #ifdef LATTICE
- #include <proto/all.h>
- #include <stdlib.h>
- #include <stdio.h>
- int CXBRK(void) { return(0); } /* Disable Lattice CTRL-C handling */
- int chkabort(void) { return(0); } /* really */
- void cleanExit(int);
- void main(void);
- #endif
-
- struct IOExtTD *trackIO; /* global pointer to trackdisk IORequest */
- short openerror; /* global flag */
-
- void cleanExit(returncode)
- int returncode;
- {
- if(!openerror)CloseDevice(trackIO);
-
- if(trackIO)
- {
- /* extract Port address from I/O Request */
- DeletePort(trackIO->iotd_Req.io_Message.mn_ReplyPort);
- DeleteExtIO(trackIO);
- }
- exit(returncode);
- }
-
- void main()
- {
- /* CreatePort() and pass the result to CreatreExtIO in one step */
- trackIO=(struct IOExtTD *)
- CreateExtIO( CreatePort(0,0),sizeof(struct IOExtTD) );
- if(!trackIO)cleanExit(RETURN_FAIL+1);
-
- if(openerror=OpenDevice("trackdisk.device",0L,trackIO,0L))
- cleanExit(RETURN_FAIL+2);
-
- trackIO->iotd_Req.io_Command=TD_SEEK; /* command */
-
- trackIO->iotd_Req.io_Offset =0L; /* out */
- DoIO(trackIO); printf("1\n");
-
- trackIO->iotd_Req.io_Offset =79*11*2*512L; /* in */
- DoIO(trackIO); printf("2\n");
-
- trackIO->iotd_Req.io_Offset =0L; /* out */
- DoIO(trackIO); printf("3\n");
-
- trackIO->iotd_Req.io_Offset =79*11*2*512L; /* in */
- DoIO(trackIO); printf("4\n");
-
- cleanExit(RETURN_OK);
-
- }
-