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-rw-r--r--arm9/include/kbd81.h76
-rw-r--r--arm9/include/keyboard.h125
-rw-r--r--arm9/include/z80.h250
-rw-r--r--arm9/include/z80_config.h59
-rw-r--r--arm9/include/z80_private.h276
-rw-r--r--arm9/include/zx81.h59
6 files changed, 769 insertions, 76 deletions
diff --git a/arm9/include/kbd81.h b/arm9/include/kbd81.h
deleted file mode 100644
index b4e3d62..0000000
--- a/arm9/include/kbd81.h
+++ /dev/null
@@ -1,76 +0,0 @@
-/*
- ds81 - Nintendo DS ZX81 emulator.
-
- Copyright (C) 2006 Ian Cowburn
-
- 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
- $Id$
-*/
-#ifndef DS81_KBD81_H
-#define DS81_KBD81_H
-
-typedef enum
-{
- KBD_1,
- KBD_2,
- KBD_3,
- KBD_4,
- KBD_5,
- KBD_6,
- KBD_7,
- KBD_8,
- KBD_9,
- KBD_0,
- KBD_Q,
- KBD_W,
- KBD_E,
- KBD_R,
- KBD_T,
- KBD_Y,
- KBD_U,
- KBD_I,
- KBD_O,
- KBD_P,
- KBD_A,
- KBD_S,
- KBD_D,
- KBD_F,
- KBD_G,
- KBD_H,
- KBD_J,
- KBD_K,
- KBD_L,
- KBD_NEWLINE,
- KBD_SHIFT,
- KBD_Z,
- KBD_X,
- KBD_C,
- KBD_V,
- KBD_B,
- KBD_N,
- KBD_M,
- KBD_PERIOD,
- KBD_SPACE
-} ZX81_Key;
-
-void KBD_Reset(void);
-void KBD_Display(const char *text);
-void KBD_Scan(void);
-ZX81_Key KBD_GetKey(void);
-void KBD_MapKey(KEYPAD_BITS pad, ZX81_Key key);
-void KBD_Probe(int scan);
-
-#endif /* DS81_KBD81_H */
diff --git a/arm9/include/keyboard.h b/arm9/include/keyboard.h
new file mode 100644
index 0000000..eefde86
--- /dev/null
+++ b/arm9/include/keyboard.h
@@ -0,0 +1,125 @@
+/*
+ ds81 - Nintendo ZX81 emulator.
+
+ Copyright (C) 2006 Ian Cowburn
+
+ 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+ $Id$
+*/
+#ifndef DS81_KEYBOARD_H
+#define DS81_KEYBOARD_H
+
+/* Note that the first 40 values purposefully are the keyboard matrix keys.
+ Note also that they are in display order, not matrix order.
+*/
+typedef enum
+{
+ SK_1,
+ SK_2,
+ SK_3,
+ SK_4,
+ SK_5,
+
+ SK_6,
+ SK_7,
+ SK_8,
+ SK_9,
+ SK_0,
+
+ SK_Q,
+ SK_W,
+ SK_E,
+ SK_R,
+ SK_T,
+
+ SK_Y,
+ SK_U,
+ SK_I,
+ SK_O,
+ SK_P,
+
+ SK_A,
+ SK_S,
+ SK_D,
+ SK_F,
+ SK_G,
+
+ SK_H,
+ SK_J,
+ SK_K,
+ SK_L,
+ SK_NEWLINE,
+
+ SK_SHIFT,
+ SK_Z,
+ SK_X,
+ SK_C,
+ SK_V,
+
+ SK_B,
+ SK_N,
+ SK_M,
+ SK_PERIOD,
+ SK_SPACE,
+
+ SK_ABOUT,
+ SK_CONFIG,
+ SK_PAD_UP,
+ SK_PAD_DOWN,
+ SK_PAD_LEFT,
+ SK_PAD_RIGHT,
+ SK_PAD_A,
+ SK_PAD_B,
+ SK_PAD_X,
+ SK_PAD_Y,
+ SK_PAD_R,
+ SK_PAD_L,
+ SK_PAD_START,
+ SK_PAD_SELECT,
+
+ NUM_SOFT_KEYS
+} SoftKey;
+
+typedef struct
+{
+ SoftKey key;
+ int pressed;
+} SoftKeyEvent;
+
+
+/* Display the soft keyboard
+*/
+void SK_DisplayKeyboard(uint16 *vram);
+
+/* Returns TRUE while there are still key events for this cycle
+*/
+int SK_GetEvent(SoftKeyEvent *ev);
+
+/* Sets a key to be 'sticky' (it will be released automatically on the next
+ non-sticky press).
+*/
+void SK_SetSticky(SoftKey key, int is_sticky);
+
+/* Flush all the keys.
+*/
+void SK_ClearKeys(void);
+
+/* Map the joypad to keys. Note that when mapped that both the key and the
+ joypad code will be generated.
+*/
+void SK_DefineJoypad(void);
+
+#endif /* DS81_KEYBOARD_H */
diff --git a/arm9/include/z80.h b/arm9/include/z80.h
new file mode 100644
index 0000000..000b950
--- /dev/null
+++ b/arm9/include/z80.h
@@ -0,0 +1,250 @@
+/*
+
+ z80 - Z80 emulation
+
+ Copyright (C) 2006 Ian Cowburn <ianc@noddybox.co.uk>
+
+ 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+ -------------------------------------------------------------------------
+
+ $Id$
+
+*/
+
+#ifndef Z80_H
+#define Z80_H "$Id$"
+
+/* Configuration
+*/
+#include "z80_config.h"
+
+
+/* ---------------------------------------- TYPES
+*/
+
+/* Large unsigned type
+*/
+typedef unsigned long Z80Val;
+
+
+/* 8-bit type. The emulation will exit with code 2 if this isn't 8 bits.
+*/
+typedef unsigned char Z80Byte;
+
+
+/* 8-bit signed type. The emulation will exit with code 2 if this isn't 8 bits.
+*/
+typedef signed char Z80Relative;
+
+
+/* 16-bit type. The emulation will exit with code 2 if this isn't 16 bits.
+*/
+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);
+typedef void (*Z80WriteMemory)(Z80 *cpu, Z80Word address, Z80Byte value);
+
+
+/* Interfaces needed to handle ports (IN/OUT commands)
+*/
+typedef Z80Byte (*Z80ReadPort)(Z80 *cpu, Z80Word address);
+typedef void (*Z80WritePort)(Z80 *cpu, Z80Word address, Z80Byte value);
+
+
+/* Callback. Callback should return TRUE for processing to continue.
+*/
+typedef int (*Z80Callback)(Z80 *cpu, Z80Val data);
+
+
+/* Callback reasons
+
+ eZ80_Instruction Called before the initial fetch for an instruction
+ (called just to once no matter how many bytes the
+ instruction is made up of).
+
+ eZ80_EDHook Called when an undefined ED opcode is executed.
+
+ eZ80_Halt Called when the HALT instruction is hit and released.
+
+ eZ80_RETI Called when the RETI instruction is executed
+*/
+typedef enum
+{
+ eZ80_Instruction, /* data = no cycles since reset */
+ eZ80_EDHook, /* data = byte after ED opcode (only for NOP opcodes) */
+ eZ80_Halt, /* data = 1 halt raised, 0 halt cleared by int */
+ eZ80_RETI, /* data = ignored */
+ eZ80_NO_CALLBACK /* leave at end */
+} Z80CallbackReason;
+
+
+/* Flags in the F register
+*/
+typedef enum
+{
+ eZ80_Carry =0x01,
+ eZ80_Neg =0x02,
+ eZ80_PV =0x04,
+ eZ80_Hidden3 =0x08,
+ eZ80_HalfCarry =0x10,
+ eZ80_Hidden5 =0x20,
+ eZ80_Zero =0x40,
+ eZ80_Sign =0x80
+} Z80FlagRegister;
+
+
+/* Disassembly label -- only useful if ENABLE_DISASSEMBLER is set.
+ Labels are stored as an array, where a NULL in the label field marks
+ the end of the list.
+*/
+typedef struct
+{
+ Z80Word address;
+ const char *label;
+} Z80Label;
+
+
+/* ---------------------------------------- INTERFACES
+*/
+
+
+/* Initialises the processor.
+*/
+#ifdef ENABLE_ARRAY_MEMORY
+Z80 *Z80Init(Z80ReadPort read_port,
+ Z80WritePort write_port);
+#else
+Z80 *Z80Init(Z80ReadMemory read_memory,
+ Z80WriteMemory write_memory,
+ Z80ReadPort read_port,
+ Z80WritePort write_port,
+ Z80ReadMemory read_for_disassem);
+#endif
+
+
+/* Resets the processor.
+*/
+void Z80Reset(Z80 *cpu);
+
+
+/* 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).
+*/
+int Z80LodgeCallback(Z80 *cpu,
+ Z80CallbackReason reason,
+ Z80Callback callback);
+
+
+/* Remove a callback. Does nothing if reason was not lodged with
+ Z80LodgeCallback()
+*/
+void Z80RemoveCallback(Z80 *cpu,
+ Z80CallbackReason reason,
+ Z80Callback callback);
+
+
+/* Cause an interrupt before the next opcode.
+ devbyte is the byte generated by the device (if any).
+*/
+void Z80Interrupt(Z80 *cpu, Z80Byte devbyte);
+
+
+/* Cause an NMI
+*/
+void Z80NMI(Z80 *cpu);
+
+
+/* Execute a single instruction. Returns FALSE if any callback returned
+ FALSE.
+*/
+int Z80SingleStep(Z80 *cpu);
+
+
+/* Executes until a callback returns FALSE (never returns otherwise)
+*/
+void Z80Exec(Z80 *cpu);
+
+
+/* Manipulate the cylce count of the Z80
+*/
+Z80Val Z80Cycles(Z80 *cpu);
+void Z80ResetCycles(Z80 *cpu, Z80Val cycles);
+
+
+/* Set address to label mappings for the disassembler
+*/
+void Z80SetLabels(Z80Label labels[]);
+
+
+/* Simple disassembly of memory accessed through read_for_disassem, or
+ Z80_MEMORY as appropriate. addr is updated on exit.
+*/
+const char *Z80Disassemble(Z80 *cpu, Z80Word *addr);
+
+#endif
+
+/* END OF FILE */
diff --git a/arm9/include/z80_config.h b/arm9/include/z80_config.h
new file mode 100644
index 0000000..8be062b
--- /dev/null
+++ b/arm9/include/z80_config.h
@@ -0,0 +1,59 @@
+/*
+
+ z80 - Z80 emulation
+
+ Copyright (C) 2006 Ian Cowburn <ianc@noddybox.co.uk>
+
+ 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+ -------------------------------------------------------------------------
+
+ $Id$
+
+*/
+
+#ifndef Z80_CONFIG_H
+#define Z80_CONFIG_H "$Id$"
+
+
+/* This file defines various compile-time configuration options
+ for the Z80 emulation
+*/
+
+
+/* Define this to enable the disassembly interface
+#define ENABLE_DISASSEM
+*/
+
+
+/* Define this to enable the array-based memory model. In this mode
+ an externally visible Z80Byte array called Z80_MEMORY must be
+ defined. The macros RAMBOT and RAMTOP define the writable area of
+ memory and must be changed accordingly.
+
+ In this mode the signature of Z80Init changes so that the memory functions
+ are not passed. ALL processor instances share the same memory.
+#define ENABLE_ARRAY_MEMORY
+*/
+
+#ifdef ENABLE_ARRAY_MEMORY
+#define RAMBOT 0x0000
+#define RAMTOP 0xffff
+#endif
+
+
+#endif
+
+/* END OF FILE */
diff --git a/arm9/include/z80_private.h b/arm9/include/z80_private.h
new file mode 100644
index 0000000..be45e56
--- /dev/null
+++ b/arm9/include/z80_private.h
@@ -0,0 +1,276 @@
+/*
+
+ z80 - Z80 emulation
+
+ Copyright (C) 2006 Ian Cowburn (ianc@noddybox.demon.co.uk)
+
+ 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+ -------------------------------------------------------------------------
+
+ $Id$
+
+ Private macros for Z80
+
+*/
+
+#ifndef Z80_PRIVATE_H
+#define Z80_PRIVATE_H "$Id$"
+
+#include "z80_config.h"
+
+#ifndef TRUE
+#define TRUE 1
+#endif
+
+#ifndef FALSE
+#define FALSE 0
+#endif
+
+#define MAX_PER_CALLBACK 10
+
+
+/* ---------------------------------------- TYPES
+*/
+
+struct Z80Private
+{
+ Z80Val cycle;
+
+ int halt;
+
+ Z80Byte shift;
+
+ int raise;
+ Z80Byte devbyte;
+ int nmi;
+
+#ifndef ENABLE_ARRAY_MEMORY
+ Z80ReadMemory disread;
+
+ Z80ReadMemory mread;
+ Z80WriteMemory mwrite;
+#endif
+
+ Z80ReadPort pread;
+ Z80WritePort pwrite;
+
+ Z80Callback callback[eZ80_NO_CALLBACK][MAX_PER_CALLBACK];
+
+ int last_cb;
+};
+
+#define PRIV cpu->priv
+
+
+/* ---------------------------------------- ARRAY MEMORY
+*/
+
+#ifdef ENABLE_ARRAY_MEMORY
+extern Z80Byte Z80_MEMORY[];
+#endif
+
+
+/* ---------------------------------------- MACROS
+*/
+
+/* NOTE: A lot of these macros assume you have a variable called 'cpu'
+ which is a pointer to Z80
+*/
+
+
+/* Invoke a callback class
+*/
+#define CALLBACK(r,d) do \
+ { \
+ int f; \
+ \
+ for(f=0;f<MAX_PER_CALLBACK;f++) \
+ if (PRIV->callback[r][f]) \
+ PRIV->last_cb &= \
+ PRIV->callback[r][f](cpu,d);\
+ } while(0)
+
+/* Flag register
+*/
+#define C_Z80 0x01
+#define N_Z80 0x02
+#define P_Z80 0x04
+#define V_Z80 P_Z80
+#define H_Z80 0x10
+#define Z_Z80 0x40
+#define S_Z80 0x80
+
+#define B3_Z80 0x08
+#define B5_Z80 0x20
+
+
+#define SET(v,b) (v)|=b
+#define CLR(v,b) (v)&=~(b)
+
+#define SETFLAG(f) SET(cpu->AF.b[LO],f)
+#define CLRFLAG(f) CLR(cpu->AF.b[LO],f)
+
+#ifdef ENABLE_ARRAY_MEMORY
+
+#define PEEK(addr) Z80_MEMORY[addr]
+
+static inline Z80Word PEEKW(Z80Word addr)
+{
+ return (PEEK(addr) | (Z80Word)PEEK(addr+1)<<8);
+}
+
+#define POKE(addr,val) do \
+ { \
+ Z80Word ba=addr; \
+ if (ba>=RAMBOT && ba<=RAMTOP) \
+ Z80_MEMORY[ba]=val; \
+ } while(0)
+
+#define POKEW(addr,val) do \
+ { \
+ Z80Word wa=addr; \
+ Z80Word wv=val; \
+ POKE(wa,wv); \
+ POKE(wa+1,wv>>8); \
+ } while(0)
+
+
+#define FETCH_BYTE (Z80_MEMORY[cpu->PC++])
+#define FETCH_WORD (cpu->PC+=2, \
+ Z80_MEMORY[cpu->PC-2]| \
+ ((Z80Word)Z80_MEMORY[cpu->PC-1]<<8))
+
+#else
+
+#define PEEK(addr) (PRIV->mread(cpu,addr))
+#define PEEKW(addr) FPEEKW(cpu,addr)
+
+#define POKE(addr,val) PRIV->mwrite(cpu,addr,val)
+#define POKEW(addr,val) FPOKEW(cpu,addr,val)
+
+#define FETCH_BYTE (PRIV->mread(cpu,cpu->PC++))
+#define FETCH_WORD (cpu->PC+=2,FPEEKW(cpu,cpu->PC-2))
+
+#endif
+
+
+#define IS_C (cpu->AF.b[LO]&C_Z80)
+#define IS_N (cpu->AF.b[LO]&N_Z80)
+#define IS_P (cpu->AF.b[LO]&P_Z80)
+#define IS_H (cpu->AF.b[LO]&H_Z80)
+#define IS_Z (cpu->AF.b[LO]&Z_Z80)
+#define IS_S (cpu->AF.b[LO]&S_Z80)
+
+#define CARRY IS_C
+
+#define IS_IX_IY (PRIV->shift==0xdd || PRIV->shift==0xfd)
+#define OFFSET(off) off=(IS_IX_IY ? (Z80Relative)FETCH_BYTE:0)
+
+#define TSTATE(n) PRIV->cycle+=n
+
+#define ADD_R(v) cpu->R=((cpu->R&0x80)|((cpu->R+(v))&0x7f))
+#define INC_R ADD_R(1)
+
+#ifdef ENABLE_ARRAY_MEMORY
+
+#define PUSH(REG) do \
+ { \
+ Z80Word pv=REG; \
+ cpu->SP-=2; \
+ POKE(cpu->SP,pv); \
+ POKE(cpu->SP+1,pv>>8); \
+ } while(0)
+
+#else
+
+#define PUSH(REG) do \
+ { \
+ Z80Word pushv=REG; \
+ cpu->SP-=2; \
+ PRIV->mwrite(cpu,cpu->SP,pushv); \
+ PRIV->mwrite(cpu,cpu->SP+1,pushv>>8);\
+ } while(0)
+#endif
+
+#define POP(REG) do \
+ { \
+ REG=PEEK(cpu->SP) | \
+ (Z80Word)PEEK(cpu->SP+1)<<8; \
+ cpu->SP+=2; \
+ } while(0)
+
+#define SETHIDDEN(res) cpu->AF.b[LO]=(cpu->AF.b[LO]&~(B3_Z80|B5_Z80))|\
+ ((res)&(B3_Z80|B5_Z80))
+
+#define CALL do \
+ { \
+ PUSH(cpu->PC+2); \
+ cpu->PC=PEEKW(cpu->PC); \
+ } while(0)
+
+#define NOCALL cpu->PC+=2
+#define JP cpu->PC=PEEKW(cpu->PC)
+#define NOJP cpu->PC+=2
+#define JR cpu->PC+=(Z80Relative)PEEK(cpu->PC)+1
+#define NOJR cpu->PC++
+
+#define OUT(P,V) do \
+ { \
+ if (PRIV->pwrite) \
+ PRIV->pwrite(cpu,P,V); \
+ } while(0)
+
+#define IN(P) (PRIV->pread?PRIV->pread(cpu,P):0)
+
+
+
+/* ---------------------------------------- LABELS
+*/
+extern Z80Label *z80_labels;
+
+
+/* ---------------------------------------- GLOBAL GENERAL OPCODES/ROUTINES
+*/
+void Z80_Decode(Z80 *cpu, Z80Byte opcode);
+void Z80_InitialiseInternals(void);
+
+
+/* ---------------------------------------- DISASSEMBLY
+*/
+#ifdef ENABLE_DISASSEM
+typedef void (*DIS_OP_CALLBACK)(Z80 *z80, Z80Byte op, Z80Word *pc);
+
+extern DIS_OP_CALLBACK dis_CB_opcode[];
+extern DIS_OP_CALLBACK dis_DD_opcode[];
+extern DIS_OP_CALLBACK dis_DD_CB_opcode[];
+extern DIS_OP_CALLBACK dis_ED_opcode[];
+extern DIS_OP_CALLBACK dis_FD_opcode[];
+extern DIS_OP_CALLBACK dis_FD_CB_opcode[];
+extern DIS_OP_CALLBACK dis_opcode_z80[];
+
+const char *Z80_Dis_Printf(const char *format, ...);
+
+Z80Byte Z80_Dis_FetchByte(Z80 *cpu, Z80Word *pc);
+Z80Word Z80_Dis_FetchWord(Z80 *cpu, Z80Word *pc);
+
+void Z80_Dis_Set(const char *op, const char *arg);
+const char *Z80_Dis_GetOp(void);
+const char *Z80_Dis_GetArg(void);
+#endif /* ENABLE_DISASSEM */
+
+#endif /* Z80_PRIVATE_H */
+
+/* END OF FILE */
diff --git a/arm9/include/zx81.h b/arm9/include/zx81.h
new file mode 100644
index 0000000..5f097bf
--- /dev/null
+++ b/arm9/include/zx81.h
@@ -0,0 +1,59 @@
+/*
+
+ ezx81 - X11 ZX81 emulator
+
+ Copyright (C) 2003 Ian Cowburn (ianc@noddybox.demon.co.uk)
+
+ 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+ -------------------------------------------------------------------------
+
+ Provides the emulation for the ZX81
+
+*/
+
+#ifndef EZX81_ZX81H
+#define EZX81_ZX81H "$Id$"
+
+#include "z80.h"
+#include "SDL.h"
+
+
+/* Initialise the ZX81
+*/
+void ZX81Init(Z80 *z80);
+
+/* Handle keypresses
+*/
+void ZX81KeyEvent(SDL_Event *e);
+
+/* Interfaces for the Z80
+*/
+Z80Byte ZX81ReadMem(Z80 *z80, Z80Word addr);
+void ZX81WriteMem(Z80 *z80, Z80Word addr, Z80Byte val);
+Z80Byte ZX81ReadPort(Z80 *z80, Z80Word port);
+void ZX81WritePort(Z80 *z80, Z80Word port, Z80Byte val);
+Z80Byte ZX81ReadForDisassem(Z80 *z80, Z80Word addr);
+
+/* Interfaces for memory menu
+*/
+const char *ZX81Info(Z80 *z80);
+void ZX81Reset(Z80 *z80);
+
+
+#endif
+
+
+/* END OF FILE */
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