mos-hardware 0.4.0

Hardware register tables and support functions for 8-bit retro computers like the Commodore 64, MEGA65 and others.
Documentation 
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#ifndef __MEGA65_MEMORY_H
#define __MEGA65_MEMORY_H

struct dmagic_dmalist {
  // Enhanced DMA options
  unsigned char option_0b;
  unsigned char option_80;
  unsigned char source_mb;
  unsigned char option_81;
  unsigned char dest_mb;
  unsigned char option_85;
  unsigned char dest_skip;
  unsigned char end_of_options;

  // F018B format DMA request
  unsigned char command;
  unsigned int count;
  unsigned int source_addr;
  unsigned char source_bank;
  unsigned int dest_addr;
  unsigned char dest_bank;
  unsigned char sub_cmd; // F018B subcmd
  unsigned int modulo;
};

extern volatile struct dmagic_dmalist dmalist;
extern volatile unsigned char dma_byte;

void mega65_io_enable(void);
unsigned char lpeek(long address);
unsigned char lpeek_debounced(long address);
void lpoke(long address, unsigned char value);
void lcopy(long source_address, long destination_address, unsigned int count);
void lfill(long destination_address, unsigned char value, unsigned int count);
void lfill_skip(long destination_address, unsigned char value, unsigned int count, unsigned char skip);
#define POKE(X, Y) (*(volatile unsigned char*)(X)) = Y
#define PEEK(X) (*(volatile unsigned char*)(X))
#endif