// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** PROPHET64 cartridge emulation **********************************************************************/ #include "emu.h" #include "prophet64.h" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** DEFINE_DEVICE_TYPE(C64_PROPHET64, c64_prophet64_cartridge_device, "c64_prophet64", "PROPHET64") //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // c64_prophet64_cartridge_device - constructor //------------------------------------------------- c64_prophet64_cartridge_device::c64_prophet64_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock) : device_t(mconfig, C64_PROPHET64, tag, owner, clock), device_c64_expansion_card_interface(mconfig, *this), m_bank(0) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void c64_prophet64_cartridge_device::device_start() { // state saving save_item(NAME(m_bank)); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void c64_prophet64_cartridge_device::device_reset() { m_bank = 0; m_exrom = 0; } //------------------------------------------------- // c64_cd_r - cartridge data read //------------------------------------------------- uint8_t c64_prophet64_cartridge_device::c64_cd_r(offs_t offset, uint8_t data, int sphi2, int ba, int roml, int romh, int io1, int io2) { if (!roml) { offs_t addr = (m_bank << 13) | (offset & 0x1fff); data = m_roml[addr]; } return data; } //------------------------------------------------- // c64_cd_w - cartridge data write //------------------------------------------------- void c64_prophet64_cartridge_device::c64_cd_w(offs_t offset, uint8_t data, int sphi2, int ba, int roml, int romh, int io1, int io2) { if (!io2) { m_bank = data & 0x1f; m_exrom = BIT(data, 5); } }