From 1f7e9c076768e6dc4aa0e5aef0a120a9a234c00b Mon Sep 17 00:00:00 2001
From: Ian C <ianc@noddybox.co.uk>
Date: Wed, 20 Sep 2006 00:02:42 +0000
Subject: Changed Z80 core and fixed raising of interrupt on R register.

---
 src/z80.h | 103 ++++++++++++++++++++++++++++++--------------------------------
 1 file changed, 49 insertions(+), 54 deletions(-)

(limited to 'src/z80.h')

diff --git a/src/z80.h b/src/z80.h
index f6bc041..000b950 100644
--- a/src/z80.h
+++ b/src/z80.h
@@ -35,12 +35,6 @@
 /* ---------------------------------------- TYPES
 */
 
-/* The processor
-*/
-struct Z80;
-typedef struct Z80 Z80;
-
-
 /* Large unsigned type
 */
 typedef unsigned long Z80Val;
@@ -61,6 +55,53 @@ typedef signed char Z80Relative;
 typedef unsigned short Z80Word;
 
 
+/* A Z80 16-bit register.  To access the HI/LO component use the indexes
+   Z80_HI_WORD and Z80_LO_WORD which will be initialised once Z80Init has been
+   called.
+*/
+typedef union
+{
+    Z80Word		w;
+    Z80Byte		b[2];
+} Z80Reg;
+
+extern int Z80_HI_WORD;
+extern int Z80_LO_WORD;
+
+
+/* The processor
+*/
+struct Z80Private;
+
+typedef struct
+{
+    Z80Word		PC;
+
+    Z80Reg		AF;
+    Z80Reg		BC;
+    Z80Reg		DE;
+    Z80Reg		HL;
+
+    Z80Word		AF_;
+    Z80Word		BC_;
+    Z80Word		DE_;
+    Z80Word		HL_;
+
+    Z80Reg		IX;
+    Z80Reg		IY;
+
+    Z80Word		SP;
+
+    Z80Byte		IFF1;
+    Z80Byte		IFF2;
+    Z80Byte		IM;
+    Z80Byte		I;
+    Z80Byte		R;
+
+    struct Z80Private	*priv;
+} Z80;
+
+
 /* Interfaces used to handle memory
 */
 typedef	Z80Byte	(*Z80ReadMemory)(Z80 *cpu, Z80Word address);
@@ -100,36 +141,6 @@ typedef enum
 } Z80CallbackReason;
 
 
-/* Get/settable state of the Z80
-*/
-typedef struct
-{
-    Z80Word	PC;
-    Z80Word	SP;
-
-    Z80Val	cycle;
-
-    Z80Word	AF;
-    Z80Word	BC;
-    Z80Word	DE;
-    Z80Word	HL;
-
-    Z80Word	AF_;	/* Alternate registers */
-    Z80Word	BC_;
-    Z80Word	DE_;
-    Z80Word	HL_;
-
-    Z80Word	IX;
-    Z80Word	IY;
-
-    Z80Byte	IFF1;
-    Z80Byte	IFF2;
-    Z80Byte	IM;
-    Z80Byte	I;
-    Z80Byte	R;
-} Z80State;
-
-
 /* Flags in the F register
 */
 typedef enum
@@ -179,21 +190,6 @@ Z80	*Z80Init(Z80ReadMemory read_memory,
 void	Z80Reset(Z80 *cpu);
 
 
-/* Sets the PC
-*/
-void	Z80SetPC(Z80 *cpu, Z80Word PC);
-
-
-/* Gets the PC
-*/
-Z80Word	Z80GetPC(Z80 *cpu);
-
-
-/* Sets the cycle count to the specified count
-*/
-void	Z80ResetCycles(Z80 *cpu, Z80Val cycles);
-
-
 /* Lodge a callback to be invoked after special events.  Returns FALSE
    if the callback couldn't be lodged (there is a max of 10 callbacks per
    reason).
@@ -233,11 +229,10 @@ int	Z80SingleStep(Z80 *cpu);
 void	Z80Exec(Z80 *cpu);
 
 
-/* Interrogate the state of the Z80
+/* Manipulate the cylce count of the Z80
 */
 Z80Val	Z80Cycles(Z80 *cpu);
-void	Z80GetState(Z80 *cpu, Z80State *state);
-void	Z80SetState(Z80 *cpu, const Z80State *state);
+void	Z80ResetCycles(Z80 *cpu, Z80Val cycles);
 
 
 /* Set address to label mappings for the disassembler
-- 
cgit v1.2.3