home *** CD-ROM | disk | FTP | other *** search
- /* 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.
- */
-
- /* An example of using the potgo.resource to read pins 9 and 5 of
- * port 1 (the non-mouse port). This bypasses the gameport.device.
- * When the right button on a mouse plugged into port 1 is pressed,
- * the read value will change.
- *
- * Use of port 0 (mouse) is unaffected.
- *
- * Lattice use lc -b1 -cfist -v -y. Link with amiga.lib and lc.lib.
- */
- #include <exec/types.h>
- #include <libraries/dos.h>
- #include <proto/all.h>
- #include <stdio.h>
-
- #ifdef LATTICE
- int CXBRK(void) { return(0); } /* Disable Lattice CTRL/C handling */
- int chkabort(void) { return(0); } /* really */
- #endif
-
- struct PotgoBase *PotgoBase;
- ULONG potbits;
- UWORD value;
-
- #define UNLESS(x) if(!(x))
- #define UNTIL(x) while(!(x))
-
- #define OUTRY 1L<<15
- #define DATRY 1L<<14
- #define OUTRX 1L<<13
- #define DATRX 1L<<12
-
- void main(int argc,char **argv)
- {
- UNLESS(PotgoBase=(struct PotgoBase *)OpenResource("potgo.resource"))
- return;
- printf("PotgoBase is at $%lx\n",PotgoBase);
-
- potbits=AllocPotBits(OUTRY|DATRY|OUTRX|DATRX);
- /* Get the bits for the right and middle mouse buttons
- on the alternate mouse port. */
-
- if(potbits != (OUTRY|DATRY|OUTRX|DATRX))
- {
- printf("Pot bits are already allocated! %lx\n",potbits);
- FreePotBits(potbits);
- return;
- }
-
- WritePotgo(0xFFFFFFFFL,potbits);
- /* Set all ones in the register (masked by potbits) */
-
- UNTIL(SIGBREAKF_CTRL_C & SetSignal(0L,0L))
- /* until CTRL-C is pressed */
- {
- value=*(UWORD *)0x00DFF016;
- /* Read word at $DFF016 */
- printf("POTINP = $%lx\n",value & potbits);
- /* Show what was read (restricted to our allocated bits) */
- }
-
- FreePotBits(potbits);
- }
-
-