vgbc/memory/ram.cpp

32 lines
640 B
C++
Raw Normal View History

2023-08-26 19:04:02 +02:00
#include "ram.h"
RAM::RAM(u16 size) : size(size), readonly(false) {
memory = new u8[size];
}
2023-08-26 21:17:47 +02:00
RAM::RAM(u8* memory, u16 size, bool readonly)
2023-08-26 19:04:02 +02:00
: 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) {
2023-08-26 21:17:47 +02:00
if(addr >= size - 1) return 0xFFFFu;
2023-08-26 19:04:02 +02:00
u16 *ptr = (u16*)&memory[addr];
return *ptr;
}