// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** Commodore 128 COMAL 80 cartridge emulation Copyright MESS Team. Visit http://mamedev.org for licensing and usage restrictions. **********************************************************************/ #include "c128_comal80.h" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** const device_type C128_COMAL80 = &device_creator; //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // c128_comal80_cartridge_device - constructor //------------------------------------------------- c128_comal80_cartridge_device::c128_comal80_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, C128_COMAL80, "C128 COMAL 80 cartridge", tag, owner, clock, "c128_comal80", __FILE__), device_c64_expansion_card_interface(mconfig, *this), m_bank(0) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void c128_comal80_cartridge_device::device_start() { // state saving save_item(NAME(m_bank)); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void c128_comal80_cartridge_device::device_reset() { m_bank = 0; } //------------------------------------------------- // c64_cd_r - cartridge data read //------------------------------------------------- UINT8 c128_comal80_cartridge_device::c64_cd_r(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2) { if (!romh) { offs_t addr = ((m_bank & 0x07) << 14) | (offset & 0x3fff); data = m_romh[addr]; } else if (!io1) { data = (m_bank << 4) | (data & 0x0f); } return data; } //------------------------------------------------- // c64_cd_w - cartridge data write //------------------------------------------------- void c128_comal80_cartridge_device::c64_cd_w(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2) { if (!io1) { /* bit description 0 1 2 3 4 A14 5 A15 6 A16 7 A17 */ m_bank = data >> 4; } }