mem.h File Reference

Virtual Memory. More...

#include <stdint.h>
#include <stddef.h>

Go to the source code of this file.

Data Structures
struct	v6502_mappedRange
	Memory Map Range Record. More...
struct	v6502_memory
	Virtual Memory Object. More...

Macros
#define	YES   1
	Boolean true.
#define	NO   0
	Boolean false.
#define	v6502_memoryStartWorkMemory   0x0000
	Start of work memory available for general program use.
#define	v6502_memoryStartStack   0x0100
	Start of memory reserved for CPU stack.
#define	v6502_memoryStartPPURegisters   0x2000
	Start of PPU registers for the RP2C02 chipset.
#define	v6502_memoryStartAPURegisters   0x4000
	Start of APU registers for the RP2A03 chipset.
#define	v6502_memoryStartExpansionRom   0x4020
	Start of memory mapped expansion ROM.
#define	v6502_memoryStartSRAM   0x6000
	Start of SRAM backed memory region.
#define	v6502_memoryStartPRGROM   0x8000
	Start of memory mapped PRGROM.
#define	v6502_memoryStartInterruptVectors   0xFFFA
	Start of memory mapped interrupt vectors.
#define	v6502_memoryStartCeiling   0xFFFF
	Maximum memory boundary.
#define	v6502_memorySizeWorkMemory   0x0800
	Size of work memory available for general program use.
#define	v6502_memorySizePPURegisters   0x0008
	Size of PPU registers for the RP2C02 chipset.
#define	v6502_memorySizeInterruptVectors   (v6502_memoryStartCeiling - v6502_memoryStartInterruptVectors)
	Size of the six interrupt vector bytes (Hint: It's six.)
#define	v6502_memoryVectorNMILow   0xFFFA
	The low byte location of the NMI vector stored in the v6502_memory::interrupt_vectors.
#define	v6502_memoryVectorNMIHigh   0xFFFB
	The high byte location of the NMI vector stored in the v6502_memory::interrupt_vectors.
#define	v6502_memoryVectorResetLow   0xFFFC
	The low byte location of the reset vector stored in the v6502_memory::interrupt_vectors.
#define	v6502_memoryVectorResetHigh   0xFFFD
	The high byte location of the reset vector stored in the v6502_memory::interrupt_vectors.
#define	v6502_memoryVectorInterruptLow   0xFFFE
	The low byte location of the normal interrupt vector stored in the v6502_memory::interrupt_vectors.
#define	v6502_memoryVectorInterruptHigh   0xFFFF
	The high byte location of the normal interrupt vector stored in the v6502_memory::interrupt_vectors.
#define	BYTE_MAX   0xFF
	Maximum possible value of an 8-bit byte.

Typedefs
typedef uint8_t()	v6502_readFunction(struct _v6502_memory *memory, uint16_t offset, int trap, void *context)
	The function prototype for memory mapped accessors to be used by external virtual hardware.
typedef void()	v6502_writeFunction(struct _v6502_memory *memory, uint16_t offset, uint8_t value, void *context)
	The function prototype for memory mapped accessors to be used by external virtual hardware.

Functions
v6502_memory *	v6502_createMemory (size_t size)
	Create v6502_memory, type is a size_t so that you can alloc an entire 64k with 0x1,0000. More...
void	v6502_destroyMemory (v6502_memory *memory)
	Destroy v6502_memory.
void	v6502_loadExpansionRomIntoMemory (v6502_memory *memory, uint8_t *rom, uint16_t size)
	Load a binary blob of expansion ROM into a given v6502_memory.
int	v6502_map (v6502_memory *memory, uint16_t start, size_t size, v6502_readFunction *read, v6502_writeFunction *write, void *context)
	Map an address in v6502_memory. More...
uint8_t	v6502_read (v6502_memory *memory, uint16_t offset, int trap)
	Read a byte from v6502_memory. More...
void	v6502_write (v6502_memory *memory, uint16_t offset, uint8_t value)
	Write a byte to v6502_memory. More...
v6502_mappedRange *	v6502_mappedRangeForOffset (v6502_memory *memory, uint16_t offset)
	Locate a v6502_mappedRange inside of v6502_memory, if it exists. More...
int8_t	v6502_signedValueOfByte (uint8_t byte)
	Convert a raw byte to its signed value.
uint8_t	v6502_byteValueOfSigned (int8_t i)
	Convert a signed value to its raw byte.

Detailed Description

Virtual Memory.