X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;ds=sidebyside;f=cpu%2Fsh2mame%2Fsh2pico.c;fp=cpu%2Fsh2mame%2Fsh2pico.c;h=ac3df3ea2c2ea3884a2ebf5051f5ce3800371404;hb=4ea707e1e38b7ca204a5012f617018d0ea5eced2;hp=e77329c76dc4a9b59c6c8d29968e8da9e95a6545;hpb=bca23c1c797cf33c2c6812962c479398e644f0aa;p=picodrive.git

diff --git a/cpu/sh2mame/sh2pico.c b/cpu/sh2mame/sh2pico.c
index e77329c..ac3df3e 100644
--- a/cpu/sh2mame/sh2pico.c
+++ b/cpu/sh2mame/sh2pico.c
@@ -9,19 +9,19 @@ typedef unsigned short UINT16;
 typedef unsigned char  UINT8;
 
 // pico memhandlers
-unsigned int pico32x_read8(unsigned int a);
-unsigned int pico32x_read16(unsigned int a);
-unsigned int pico32x_read32(unsigned int a);
-void pico32x_write8(unsigned int a, unsigned int d);
-void pico32x_write16(unsigned int a, unsigned int d);
-void pico32x_write32(unsigned int a, unsigned int d);
-
-#define RB pico32x_read8
-#define RW pico32x_read16
-#define RL pico32x_read32
-#define WB pico32x_write8
-#define WW pico32x_write16
-#define WL pico32x_write32
+unsigned int p32x_sh2_read8(unsigned int a);
+unsigned int p32x_sh2_read16(unsigned int a);
+unsigned int p32x_sh2_read32(unsigned int a);
+void p32x_sh2_write8(unsigned int a, unsigned int d);
+void p32x_sh2_write16(unsigned int a, unsigned int d);
+void p32x_sh2_write32(unsigned int a, unsigned int d);
+
+#define RB p32x_sh2_read8
+#define RW p32x_sh2_read16
+#define RL p32x_sh2_read32
+#define WB p32x_sh2_write8
+#define WW p32x_sh2_write16
+#define WL p32x_sh2_write32
 
 // some stuff from sh2comn.h
 #define T	0x00000001
@@ -42,15 +42,15 @@ void pico32x_write32(unsigned int a, unsigned int d);
 void sh2_reset(SH2 *sh2)
 {
 	int save_is_slave;
-//	cpu_irq_callback save_irqcallback;
+	void *save_irqcallback;
 
-//	save_irqcallback = sh2->irq_callback;
+	save_irqcallback = sh2->irq_callback;
 	save_is_slave = sh2->is_slave;
 
 	memset(sh2, 0, sizeof(SH2));
 
 	sh2->is_slave = save_is_slave;
-//	sh2->irq_callback = save_irqcallback;
+	sh2->irq_callback = save_irqcallback;
 
 	sh2->pc = RL(0);
 	sh2->r[15] = RL(4);
@@ -103,7 +103,8 @@ int sh2_execute(SH2 *sh2_, int cycles)
 
 		if (sh2->test_irq && !sh2->delay)
 		{
-//			CHECK_PENDING_IRQ("mame_sh2_execute");
+			if (sh2->pending_irq)
+				sh2_irl_irq(sh2, sh2->pending_irq);
 			sh2->test_irq = 0;
 		}
 		sh2_icount--;
@@ -118,4 +119,31 @@ void sh2_init(SH2 *sh2)
 	memset(sh2, 0, sizeof(*sh2));
 }
 
+void sh2_irl_irq(SH2 *sh2, int level)
+{
+	int vector;
+
+	sh2->pending_irq = level;
+
+	if (level <= ((sh2->sr >> 4) & 0x0f))
+		/* masked */
+		return;
+
+	sh2->irq_callback(level);
+	vector = 64 + level/2;
+
+	sh2->r[15] -= 4;
+	WL(sh2->r[15], sh2->sr);		/* push SR onto stack */
+	sh2->r[15] -= 4;
+	WL(sh2->r[15], sh2->pc);		/* push PC onto stack */
+
+	/* set I flags in SR */
+	sh2->sr = (sh2->sr & ~I) | (level << 4);
+
+	/* fetch PC */
+	sh2->pc = RL(sh2->vbr + vector * 4);
+
+	/* 13 cycles at best */
+	sh2_icount -= 13;
+}