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Amiga ACS 1998 #6
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amigaacscoverdisc1998-061998.iso
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descent
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coindev.c
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1998-06-08
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/*
THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
SOFTWARE CORPORATION ("PARALLAX"). PARALLAX, IN DISTRIBUTING THE CODE TO
END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
IN USING, DISPLAYING, AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
FREE PURPOSES. IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES. THE END-USER UNDERSTANDS
AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
*/
/*
* $Source: f:/miner/source/main/rcs/coindev.c $
* $Revision: 2.0 $
* $Author: john $
* $Date: 1995/02/27 11:26:39 $
*
* Routines to read the coin counter.
*
* $Log: coindev.c $
* Revision 2.0 1995/02/27 11:26:39 john
* New version 2.0, which has no anonymous unions, builds with
* Watcom 10.0, and doesn't require parsing BITMAPS.TBL.
*
* Revision 1.2 1994/09/16 16:15:05 john
* Added acrade sequencing.
*
* Revision 1.1 1994/09/16 12:56:09 john
* Initial revision
*
*
*/
#pragma off (unreferenced)
static char rcsid[] = "$Id: coindev.c 2.0 1995/02/27 11:26:39 john Exp $";
#pragma on (unreferenced)
#include <stdio.h>
#include <dos.h>
#include <conio.h>
#include "coindev.h"
int CoinMechPort[3] = { COINMECH1_PORT,
COINMECH2_PORT,
COINMECH3_PORT };
int CoinMechCtrl[3] = { COINMECH1_CTRLMASK,
COINMECH2_CTRLMASK,
COINMECH3_CTRLMASK };
unsigned int CoinMechLastCnt[3];
int coindev_init(CoinMechNumber)
{
int x;
int CoinMechAdj[3] = { COINMECH1_ADJMASK,
COINMECH2_ADJMASK,
COINMECH3_ADJMASK };
/* set up IO port for our special use */
outp(COINMECH_CMDPORT, CoinMechCtrl[CoinMechNumber]);
outp(CoinMechPort[CoinMechNumber], 0);
outp(CoinMechPort[CoinMechNumber], 0);
/* write to the IO board so that the counter eventually gets cleared */
for( x = 10; x > 0; x-- )
{
outp(COINMECH_ADJPORT, CoinMechAdj[CoinMechNumber]);
outp(COINMECH_ADJPORT, 0);
if( coindev_read(CoinMechNumber) == 0 )
{
break;
}
}
CoinMechLastCnt[CoinMechNumber] = 0;
return(x); /* TRUE == CoinMech is cleared; FALSE == CoinMech error! */
}
/* Do a raw read of the specified CoinMech */
unsigned int coindev_read(CoinMechNumber)
{
unsigned int x;
/* read lower byte, then upper byte */
x = (inp(CoinMechPort[CoinMechNumber]));
x += (inp(CoinMechPort[CoinMechNumber]) * 256);
/* conver to usable number */
if( x )
{
x = (65536L - x);
}
return(x);
}
/* read the specified CoinMech and return the */
/* ...number of clicks since the last read */
unsigned int coindev_count(CoinMechNumber)
{
unsigned int x, y;
x = coindev_read(CoinMechNumber);
y = x - CoinMechLastCnt[CoinMechNumber];
CoinMechLastCnt[CoinMechNumber] = x;
return(y);
}