Initial commit - http://sourceforge.net/p/fceumm/code/160/

src/input/powerpad.c

@@ -0,0 +1,80 @@
+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2002 Xodnizel
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include        <string.h>
+#include        <stdlib.h>
+#include        "share.h"
+
+
+static char side;
+static uint32 pprsb[2];
+static uint32 pprdata[2];
+
+static uint8 FP_FASTAPASS(1) ReadPP(int w) {
+	uint8 ret = 0;
+	ret |= ((pprdata[w] >> pprsb[w]) & 1) << 3;
+	ret |= ((pprdata[w] >> (pprsb[w] + 8)) & 1) << 4;
+	if (pprsb[w] >= 4) {
+		ret |= 0x10;
+		if (pprsb[w] >= 8)
+			ret |= 0x08;
+	}
+				#ifdef FCEUDEF_DEBUGGER
+	if (!fceuindbg)
+				#endif
+	pprsb[w]++;
+	return ret;
+}
+
+static void FP_FASTAPASS(1) StrobePP(int w) {
+	pprsb[w] = 0;
+}
+
+void FP_FASTAPASS(3) UpdatePP(int w, void *data, int arg) {
+	static const char shifttableA[12] = { 8, 9, 0, 1, 11, 7, 4, 2, 10, 6, 5, 3 };
+	static const char shifttableB[12] = { 1, 0, 9, 8, 2, 4, 7, 11, 3, 5, 6, 10 };
+	int x;
+
+	pprdata[w] = 0;
+
+	if (side == 'A')
+		for (x = 0; x < 12; x++)
+			pprdata[w] |= (((*(uint32*)data) >> x) & 1) << shifttableA[x];
+	else
+		for (x = 0; x < 12; x++)
+			pprdata[w] |= (((*(uint32*)data) >> x) & 1) << shifttableB[x];
+}
+
+static INPUTC PwrPadCtrl = { ReadPP, 0, StrobePP, UpdatePP, 0, 0 };
+
+static INPUTC *FCEU_InitPowerpad(int w) {
+	pprsb[w] = pprdata[w] = 0;
+	return(&PwrPadCtrl);
+}
+
+INPUTC *FCEU_InitPowerpadA(int w) {
+	side = 'A';
+	return(FCEU_InitPowerpad(w));
+}
+
+INPUTC *FCEU_InitPowerpadB(int w) {
+	side = 'B';
+	return(FCEU_InitPowerpad(w));
+}