// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** COMAL 80 cartridge emulation **********************************************************************/ #include "emu.h" #include "comal80.h" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** DEFINE_DEVICE_TYPE(C64_COMAL80, c64_comal80_cartridge_device, "c64_comal80", "C64 COMAL 80 cartridge") //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // c64_comal80_cartridge_device - constructor //------------------------------------------------- c64_comal80_cartridge_device::c64_comal80_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, C64_COMAL80, tag, owner, clock), device_c64_expansion_card_interface(mconfig, *this), m_bank(0) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void c64_comal80_cartridge_device::device_start() { // state saving save_item(NAME(m_bank)); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void c64_comal80_cartridge_device::device_reset() { m_bank = 0; } //------------------------------------------------- // c64_cd_r - cartridge data read //------------------------------------------------- uint8_t c64_comal80_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 || !romh) { offs_t addr = (m_bank << 14) | (offset & 0x3fff); data = m_roml[addr]; } return data; } //------------------------------------------------- // c64_cd_w - cartridge data write //------------------------------------------------- void c64_comal80_cartridge_device::c64_cd_w(offs_t offset, uint8_t data, int sphi2, int ba, int roml, int romh, int io1, int io2) { if (!io1) { if (BIT(data, 7)) { m_bank = data & 0x03; } } }