mirror of
https://github.com/MoleskiCoder/EightBit.git
synced 2024-09-29 00:54:54 +00:00
32 lines
747 B
C++
32 lines
747 B
C++
#include "stdafx.h"
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#include "Bus.h"
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EightBit::Bus::Bus()
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: Memory(0xffff) {
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}
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void EightBit::Bus::reset() {
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REG(NR52) = 0xf1;
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REG(LCDC) = 0x91;
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}
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void EightBit::Bus::loadBootRom(const std::string& path) {
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auto size = loadMemory(path, 0);
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if (size != 0x100)
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throw std::runtime_error("Incorrectly sized boot ROM");
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std::copy_n(m_bus.cbegin(), size, m_boot.begin());
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}
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uint8_t& EightBit::Bus::reference() {
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auto effective = effectiveAddress(ADDRESS().word);
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if (isBootRom(effective))
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return placeDATA(m_boot[effective]);
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return Memory::reference();
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}
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uint8_t EightBit::Bus::peek(uint16_t address) const {
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auto effective = effectiveAddress(address);
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if (isBootRom(effective))
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return m_boot[effective];
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return m_bus[effective];
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} |