From d79814692f6ba7c706c8e4e5dcce4c36b2f077ba Mon Sep 17 00:00:00 2001
From: TomW <TomW@localhost>
Date: Sun, 12 Jul 2015 14:53:03 +0100
Subject: [PATCH] Flush memory->codeblock list heads on CPU reset - fixes
 "block->next->pc=0" errors on reset on some machines.

---
 src/codegen_x86.c |  1 +
 src/mem.c         | 14 ++++++++++++++
 src/mem.h         |  1 +
 3 files changed, 16 insertions(+)

diff --git a/src/codegen_x86.c b/src/codegen_x86.c
index b06859e..ea6bb8e 100644
--- a/src/codegen_x86.c
+++ b/src/codegen_x86.c
@@ -86,6 +86,7 @@ void codegen_reset()
 {
         memset(codeblock, 0, BLOCK_SIZE * sizeof(codeblock_t));
         memset(codeblock_hash, 0, HASH_SIZE * sizeof(codeblock_t *));
+        mem_reset_page_blocks();
 }
 
 void dump_block()
diff --git a/src/mem.c b/src/mem.c
index 0d699ac..f588012 100644
--- a/src/mem.c
+++ b/src/mem.c
@@ -1800,6 +1800,20 @@ void mem_resize()
 //        pclog("Mem resize %i %i\n",mem_size,c);
 }
 
+void mem_reset_page_blocks()
+{
+        int c;
+        
+        for (c = 0; c < ((mem_size * 1024 * 1024) >> 12); c++)
+        {
+                pages[c].write_b = mem_write_ramb_page;
+                pages[c].write_w = mem_write_ramw_page;
+                pages[c].write_l = mem_write_raml_page;
+                pages[c].block = NULL;
+                pages[c].block_2 = NULL;
+        }
+}
+
 int mem_a20_key = 0, mem_a20_alt = 0;
 static int mem_a20_state = 0;
 
diff --git a/src/mem.h b/src/mem.h
index bfbf987..3ea4de3 100644
--- a/src/mem.h
+++ b/src/mem.h
@@ -143,3 +143,4 @@ void mem_write_ramb_page(uint32_t addr, uint8_t val, page_t *p);
 void mem_write_ramw_page(uint32_t addr, uint16_t val, page_t *p);
 void mem_write_raml_page(uint32_t addr, uint32_t val, page_t *p);
 
+void mem_reset_page_blocks();