mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
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cab4ecba99
* added an option to set VDP mode (PAL/NTSC) independently from console region. * added an option to select console master clock frequency (PAL/NTSC/AUTO): emulation now run at selected frequency when VSYNC is disabled. * added an option to force VSYNC disabled. * improved screen scaling. [Core] * moved INLINE definition to macros.h * removed unused typedef from osd_cpu.h * cleanup include files
129 lines
5.1 KiB
C
129 lines
5.1 KiB
C
/* ======================================================================== */
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/* ========================= LICENSING & COPYRIGHT ======================== */
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/* ======================================================================== */
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/*
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* MUSASHI
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* Version 3.32
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*
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* A portable Motorola M680x0 processor emulation engine.
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* Copyright Karl Stenerud. All rights reserved.
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*
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* This code may be freely used for non-commercial purposes as long as this
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* copyright notice remains unaltered in the source code and any binary files
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* containing this code in compiled form.
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*
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* All other licensing terms must be negotiated with the author
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* (Karl Stenerud).
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*
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* The latest version of this code can be obtained at:
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* http://kstenerud.cjb.net
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*/
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/* Modified by Eke-Eke for Genesis Plus GX:
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- removed unused stuff to reduce memory usage / optimize execution (multiple CPU types support, NMI support, ...)
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- moved stuff to compile statically in a single object file
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- implemented support for global cycle count (shared by 68k & Z80 CPU)
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- added support for interrupt latency (Sesame's Street Counting Cafe, Fatal Rewind)
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- added proper cycle use on reset
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- added cycle accurate timings for MUL/DIV instructions (thanks to Jorge Cwik !)
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- fixed undocumented flags for DIV instructions (Blood Shot)
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*/
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#ifndef M68KCONF__HEADER
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#define M68KCONF__HEADER
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/* Configuration switches.
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* Use OPT_SPECIFY_HANDLER for configuration options that allow callbacks.
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* OPT_SPECIFY_HANDLER causes the core to link directly to the function
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* or macro you specify, rather than using callback functions whose pointer
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* must be passed in using m68k_set_xxx_callback().
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*/
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#define OPT_OFF 0
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#define OPT_ON 1
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#define OPT_SPECIFY_HANDLER 2
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/* ======================================================================== */
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/* ============================= CONFIGURATION ============================ */
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/* ======================================================================== */
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/* If ON, the CPU will call m68k_write_32_pd() when it executes move.l with a
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* predecrement destination EA mode instead of m68k_write_32().
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* To simulate real 68k behavior, m68k_write_32_pd() must first write the high
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* word to [address+2], and then write the low word to [address].
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*/
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#define M68K_SIMULATE_PD_WRITES OPT_OFF
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/* If ON, CPU will call the interrupt acknowledge callback when it services an
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* interrupt.
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* If off, all interrupts will be autovectored and all interrupt requests will
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* auto-clear when the interrupt is serviced.
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*/
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#define M68K_EMULATE_INT_ACK OPT_SPECIFY_HANDLER
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#define M68K_INT_ACK_CALLBACK(A) vdp_68k_irq_ack(A)
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/* If ON, CPU will call the output reset callback when it encounters a reset
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* instruction.
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*/
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#define M68K_EMULATE_RESET OPT_OFF
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#define M68K_RESET_CALLBACK() your_reset_handler_function()
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/* If ON, CPU will call the callback when it encounters a tas
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* instruction.
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*/
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#define M68K_TAS_HAS_CALLBACK OPT_OFF
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#define M68K_TAS_CALLBACK() your_tas_handler_function()
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/* If ON, CPU will call the set fc callback on every memory access to
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* differentiate between user/supervisor, program/data access like a real
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* 68000 would. This should be enabled and the callback should be set if you
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* want to properly emulate the m68010 or higher. (moves uses function codes
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* to read/write data from different address spaces)
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*/
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#define M68K_EMULATE_FC OPT_OFF
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#define M68K_SET_FC_CALLBACK(A) your_set_fc_handler_function(A)
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/* If ON, the CPU will monitor the trace flags and take trace exceptions
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*/
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#define M68K_EMULATE_TRACE OPT_OFF
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/* If ON, the CPU will emulate the 4-byte prefetch queue of a real 68000 */
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#define M68K_EMULATE_PREFETCH OPT_OFF
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/* If ON, the CPU will generate address error exceptions if it tries to
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* access a word or longword at an odd address.
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* NOTE: This is only emulated properly for 68000 mode.
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*/
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#define M68K_EMULATE_ADDRESS_ERROR OPT_ON
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/* If ON and previous option is also ON, address error exceptions will
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also be checked when fetching instructions. Disabling this can help
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speeding up emulation while still emulating address error exceptions
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on other memory access if needed.
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* NOTE: This is only emulated properly for 68000 mode.
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*/
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#define M68K_CHECK_PC_ADDRESS_ERROR OPT_OFF
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/* ----------------------------- COMPATIBILITY ---------------------------- */
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/* The following options set optimizations that violate the current ANSI
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* standard, but will be compliant under the forthcoming C9X standard.
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*/
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/* If ON, the enulation core will use 64-bit integers to speed up some
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* operations.
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*/
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#define M68K_USE_64_BIT OPT_OFF
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/* ======================================================================== */
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/* ============================== END OF FILE ============================= */
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/* ======================================================================== */
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#endif /* M68KCONF__HEADER */
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