mirror of
https://github.com/RetroDECK/Supermodel.git
synced 2024-11-23 06:15:37 +00:00
c73cb830dc
- Added a 68K interface, CPU/68K/M68K.*. - Moved Turbo68K source files to CPU/68K/Turbo68K. It is no longer used but is being retained in the source tree for now. The LSR instruction has not been fixed in this update. - Changed sound board code to use the new 68K interface (and hence, Musashi). - Changed version string from 0.2-WIP to 0.2a-WIP. This is still an alpha version. - Above changes have broken the 68K debugger.
252 lines
6.2 KiB
C
252 lines
6.2 KiB
C
/**
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** Supermodel
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** A Sega Model 3 Arcade Emulator.
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** Copyright 2011 Bart Trzynadlowski
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**
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** This file is part of Supermodel.
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**
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** Supermodel is free software: you can redistribute it and/or modify it under
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** the terms of the GNU General Public License as published by the Free
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** Software Foundation, either version 3 of the License, or (at your option)
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** any later version.
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**
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** Supermodel is distributed in the hope that it will be useful, but WITHOUT
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** ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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** FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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** more details.
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**
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** You should have received a copy of the GNU General Public License along
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** with Supermodel. If not, see <http://www.gnu.org/licenses/>.
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**/
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/*
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* M68K.h
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*
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* Header file for 68K CPU interface. Caution: there is only a single 68K core
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* available to Supermodel right now. Therefore, multiple 68K CPUs are not
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* presently supported. See M68K.c for more details.
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*
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* TO-DO List:
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* -----------
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* - Optimize things, perhaps by using FASTCALL
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*/
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#ifndef INCLUDED_M68K_H
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#define INCLUDED_M68K_H
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#include "Types.h"
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#include "Musashi/m68k.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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// This doesn't work for now (needs to be added to the prototypes in m68k.h for m68k_read_memory*)
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//#ifndef FASTCALL
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#undef FASTCALL
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#define FASTCALL
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//#endif
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/******************************************************************************
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Definitions
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******************************************************************************/
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// IRQ callback special return values
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#define M68K_IRQ_AUTOVECTOR M68K_INT_ACK_AUTOVECTOR // signals an autovectored interrupt
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#define M68K_IRQ_SPURIOUS M68K_INT_ACK_SPURIOUS // signals a spurious interrupt
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/******************************************************************************
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68K Interface
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******************************************************************************/
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/*
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* M68KGetDRegister(int n):
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*
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* Parameters:
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* n Register number (0-7).
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*
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* Returns:
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* Register An.
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*/
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extern UINT32 M68KGetARegister(int n);
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/*
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* M68KGetDRegister(int n):
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*
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* Parameters:
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* n Register number (0-7).
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*
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* Returns:
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* Register Dn.
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*/
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extern UINT32 M68KGetDRegister(int reg);
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/*
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* M68KGetPC():
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*
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* Returns:
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* Current program counter.
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*/
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extern UINT32 M68KGetPC(void);
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/*
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* M68KSetIRQ(irqLevel):
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*
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* Sets the interrupt level (IPL2-IPL0 pins).
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*
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* Parameters:
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* irqLevel The interrupt level (1-7) or 0 to clear the interrupt.
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*/
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extern void M68KSetIRQ(int irqLevel);
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/*
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* M68KRun(numCycles):
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*
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* Runs the 68K.
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*
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* Parameters:
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* numCycles Number of cycles to run.
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*
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* Returns:
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* Number of cycles executed.
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*/
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extern int M68KRun(int numCycles);
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/*
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* M68KReset():
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*
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* Resets the 68K.
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*/
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extern void M68KReset(void);
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/*
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* M68KSetIRQCallback(F):
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*
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* Installs an interrupt acknowledge callback. The default behavior is to
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* always assume autovectored interrupts.
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*
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* Parameters:
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* F Callback function.
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*/
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extern void M68KSetIRQCallback(int (*F)(int));
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/*
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* M68KSetFetch8Callback(F):
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* M68KSetFetch16Callback(F):
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* M68KSetFetch32Callback(F):
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* M68KSetRead8Callback(F):
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* M68KSetRead16Callback(F):
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* M68KSetRead32Callback(F):
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* M68KSetWrite8Callback(F):
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* M68KSetWrite16Callback(F):
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* M68KSetWrite32Callback(F):
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*
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* Installs address space handler callbacks. There is no default behavior;
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* these must all be set up before any 68K-related emulation functions are
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* invoked.
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*
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* Parameters:
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* F Callback function.
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*/
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extern void M68KSetFetch8Callback(UINT8 (*F)(UINT32));
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extern void M68KSetFetch16Callback(UINT16 (*F)(UINT32));
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extern void M68KSetFetch32Callback(UINT32 (*F)(UINT32));
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extern void M68KSetRead8Callback(UINT8 (*F)(UINT32));
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extern void M68KSetRead16Callback(UINT16 (*F)(UINT32));
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extern void M68KSetRead32Callback(UINT32 (*F)(UINT32));
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extern void M68KSetWrite8Callback(void (*F)(UINT32,UINT8));
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extern void M68KSetWrite16Callback(void (*F)(UINT32,UINT16));
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extern void M68KSetWrite32Callback(void (*F)(UINT32,UINT32));
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/*
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* M68KInit():
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*
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* Initializes the 68K emulator. Must be called once per program session prior
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* to any other 68K interface calls.
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*
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* Returns:
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* Always returns OKAY.
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*/
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extern BOOL M68KInit(void);
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/******************************************************************************
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68K Handlers
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Intended for use directly by the 68K core.
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******************************************************************************/
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/*
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* M68KIRQCallback(nIRQ):
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*
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* Interrupt acknowledge callback. Called when an interrupt is being serviced.
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* Actually implemented by calling a user-supplied callback.
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*
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* Parameters:
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* nIRQ IRQ level (1-7).
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*
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* Returns:
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* The interrupt vector to use, M68K_IRQ_AUTOVECTOR, or
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* M68K_IRQ_SPURIOUS. If no callback has been installed, the default
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* callback is used and always returns M68K_IRQ_AUTOVECTOR.
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*/
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extern int M68KIRQCallback(int nIRQ);
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/*
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* M68KFetch8(a):
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* M68KFetch16(a):
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* M68KFetch32(a):
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*
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* Read data from the program address space.
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*
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* Parameters:
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* a Address to read from.
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*
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* Returns:
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* The 8, 16, or 32-bit value read.
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*/
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unsigned int FASTCALL M68KFetch8(unsigned int a);
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unsigned int FASTCALL M68KFetch16(unsigned int a);
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unsigned int FASTCALL M68KFetch32(unsigned int a);
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/*
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* M68KRead8(a):
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* M68KRead16(a):
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* M68KRead32(a):
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*
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* Read data from the data address space.
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*
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* Parameters:
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* a Address to read from.
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*
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* Returns:
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* The 8, 16, or 32-bit value read.
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*/
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unsigned int FASTCALL M68KRead8(unsigned int a);
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unsigned int FASTCALL M68KRead16(unsigned int a);
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unsigned int FASTCALL M68KRead32(unsigned int a);
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/*
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* M68KWrite8(a, d):
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* M68KWrite16(a, d):
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* M68KWrite32(a, d):
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*
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* Writes to the data address space.
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*
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* Parameters:
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* a Address to write to.
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* d Data to write.
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*/
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void FASTCALL M68KWrite8(unsigned int a, unsigned int d);
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void FASTCALL M68KWrite16(unsigned int a, unsigned int d);
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void FASTCALL M68KWrite32(unsigned int a, unsigned int d);
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#ifdef __cplusplus
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}
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#endif
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#endif // INCLUDED_M68K_H
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