From 655f8df08034f20ced8292aa8fbbb4beb94c29e5 Mon Sep 17 00:00:00 2001
From: notaz <notasas@gmail.com>
Date: Tue, 24 Apr 2007 18:46:37 +0000
Subject: [PATCH] debug, unbreaking castlevania 3

git-svn-id: file:///home/notaz/opt/svn/fceu@109 be3aeb3a-fb24-0410-a615-afba39da0efa
---
 fce.c        | 12 +++++++++---
 ncpu_debug.c | 27 +++++++++++++++++++--------
 2 files changed, 28 insertions(+), 11 deletions(-)

diff --git a/fce.c b/fce.c
index 79aa4be..abcf10f 100644
--- a/fce.c
+++ b/fce.c
@@ -1190,9 +1190,15 @@ void EmLoop(void)
   else if(VBlankON)
    TriggerNMI();
 
-  X6502_Run(256+85-12);
-  for(scanline=242+1;scanline<scanlines_per_frame;scanline++)
-    X6502_Run(256+85);
+  // Note: this is needed for asm core
+  // Warning: using 'scanline' var here breaks Castlevania III
+  {
+   int lines;
+   X6502_Run(256+85-12);
+   for (lines=scanlines_per_frame-242-1;lines;lines--)
+     X6502_Run(256+85);
+  }
+  // X6502_Run((scanlines_per_frame-242)*(256+85)-12);
 
   PPU_status&=0x1f;
 
diff --git a/ncpu_debug.c b/ncpu_debug.c
index 8546bc2..63eef3f 100644
--- a/ncpu_debug.c
+++ b/ncpu_debug.c
@@ -12,7 +12,7 @@ extern uint8  nes_internal_ram[0x800];
 uint32 PC_prev = 0xcccccc, OP_prev = 0xcccccc;
 int32  g_cnt = 0;
 
-static int pending_add_cycles = 0, pending_rebase = 0;
+static int pending_add_cycles = 0, pending_rebase = 0, pending_irq = 0;
 
 uint8  dreads[4];
 uint32 dwrites_c[2], dwrites_a[2];
@@ -117,9 +117,7 @@ static void compare_ram(void)
 void TriggerIRQ_d(void)
 {
 	printf("-- irq\n");
-	TriggerIRQ_c();
-	TriggerIRQ_a();
-	compare_state();
+	pending_irq |= 0x100;
 }
 
 void TriggerNMI_d(void)
@@ -147,6 +145,20 @@ void X6502_Run_d(int32 c)
 
 	while (g_cnt > 0)
 	{
+		if (pending_irq) {
+			if (pending_irq & 0x100) {
+				TriggerIRQ_c();
+				TriggerIRQ_a();
+			}
+			if (pending_irq & 0xff) {
+				TriggerIRQ_c();
+				TriggerIRQ_a();
+				X6502_IRQBegin_c(pending_irq & 0xff);
+				X6502_IRQBegin_a(pending_irq & 0xff);
+			}
+			pending_irq = 0;
+		}
+
 		nes_registers[7]=1;
 		X.count=1;
 
@@ -158,8 +170,6 @@ void X6502_Run_d(int32 c)
 		compare_state();
 		g_cnt -= 1 - X.count;
 		if (pending_add_cycles) {
-			//X6502_AddCycles_c(pending_add_cycles);
-			//X6502_AddCycles_a(pending_add_cycles);
 			g_cnt -= pending_add_cycles*48;
 			pending_add_cycles = 0;
 		}
@@ -208,8 +218,9 @@ void X6502_IRQBegin_d(int w)
 {
 	printf("-- IRQBegin(%02x)\n", w);
 
-	X6502_IRQBegin_c(w);
-	X6502_IRQBegin_a(w);
+	// X6502_IRQBegin_c(w);
+	// X6502_IRQBegin_a(w);
+	pending_irq |= w;
 }
 
 void X6502_IRQEnd_d(int w)
-- 
2.39.5