vgbc/memory/ram.cpp

#include "ram.h"

RAM::RAM(u16 size) : size(size), readonly(false) {
  memory = new u8[size];
}

RAM::RAM(u8* memory, u16 size, bool readonly)
  : memory(memory), size(size), readonly(readonly)
{}

void RAM::write8(u16 addr, u8 data) {
  if(addr >= size || readonly) return;
  memory[addr] = data;
}

u8 RAM::read8(u16 addr) {
  if (addr >= size) return 0xFFu;
  return memory[addr];
}

void RAM::write16(u16 addr, u16 data) {
  if(addr >= size - 1 || readonly) return;
  u16 *ptr = (u16*)&memory[addr];
  *ptr = data;
}

u16 RAM::read16(u16 addr) {
  if(addr >= size - 1) return 0xFFFFu;
  u16 *ptr = (u16*)&memory[addr];
  return *ptr;
}