src/state.h

Mon, 29 Nov 2010 00:20:40 +0000

author
Philip Pemberton <philpem@philpem.me.uk>
date
Mon, 29 Nov 2010 00:20:40 +0000
changeset 18
320dc6206f52
child 24
724d2f6deb37
permissions
-rw-r--r--

split state handling into state.[ch]

     1 #ifndef _STATE_H
     2 #define _STATE_H
     4 #include <stddef.h>
     5 #include <stdint.h>
     6 #include <stdbool.h>
     8 // Maximum size of the Boot PROMs. Must be a binary power of two.
     9 #define ROM_SIZE 32768
    11 /**
    12  * @brief Emulator state storage
    13  *
    14  * This structure stores the internal state of the emulator.
    15  */
    16 typedef struct {
    17 	// Boot PROM can be up to 32Kbytes total size
    18 	uint8_t		rom[ROM_SIZE];		///< Boot PROM data buffer
    20 	// Main system RAM
    21 	uint8_t		*ram;				///< RAM data buffer
    22 	size_t		ram_size;			///< Size of RAM buffer in bytes
    24 	// GENERAL CONTROL REGISTER
    25 	/// GENCON.ROMLMAP -- false ORs the address with 0x800000, forcing the
    26 	/// 68010 to access ROM instead of RAM when booting. TRM page 2-36.
    27 	bool		romlmap;			
    28 } S_state;
    30 // Global emulator state. Yes, I know global variables are evil, please don't
    31 // email me and lecture me about it.  -philpem
    32 #ifndef _STATE_C
    33 extern S_state state;
    34 #else
    35 S_state state;
    36 #endif
    38 /**
    39  * @brief	Initialise system state
    40  *
    41  * @param	ramsize		RAM size in bytes -- must be a multiple of 512KiB, min 512KiB, max 4MiB.
    42  *
    43  * Initialises the emulator's internal state.
    44  */
    45 int state_init(size_t ramsize);
    47 /**
    48  * @brief Deinitialise system state
    49  *
    50  * Deinitialises the saved state, and frees all memory. Call this function
    51  * before exiting your program to avoid memory leaks.
    52  */
    53 void state_done();
    55 #endif