// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** Easy Calc Result cartridge emulation **********************************************************************/ /* PCB Layout ---------- |===========================| |=| | |=| ROM0 LS73 | |=| | |=| | |=| | |=| | |=| ROM1 LS00 | |=| | |===========================| ROM0 - Hitachi HN61364P 8Kx8 EPROM "CR2001" ROM1 - Hitachi HN613128P 16Kx8 EPROM "CR3001" */ #include "emu.h" #include "easy_calc_result.h" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** DEFINE_DEVICE_TYPE(C64_EASY_CALC_RESULT, c64_easy_calc_result_cartridge_device, "c64_easy_calc_result", "C64 Easy Calc Result cartridge") //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // c64_easy_calc_result_cartridge_device - constructor //------------------------------------------------- c64_easy_calc_result_cartridge_device::c64_easy_calc_result_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, C64_EASY_CALC_RESULT, tag, owner, clock), device_c64_expansion_card_interface(mconfig, *this), m_bank(0) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void c64_easy_calc_result_cartridge_device::device_start() { // state saving save_item(NAME(m_bank)); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void c64_easy_calc_result_cartridge_device::device_reset() { m_bank = 0; } //------------------------------------------------- // c64_cd_r - cartridge data read //------------------------------------------------- uint8_t c64_easy_calc_result_cartridge_device::c64_cd_r(address_space &space, offs_t offset, uint8_t data, int sphi2, int ba, int roml, int romh, int io1, int io2) { if (!roml) { data = m_roml[offset & 0x1fff]; } else if (!romh) { data = m_romh[(m_bank << 13) | (offset & 0x1fff)]; } return data; } //------------------------------------------------- // c64_cd_w - cartridge data write //------------------------------------------------- void c64_easy_calc_result_cartridge_device::c64_cd_w(address_space &space, offs_t offset, uint8_t data, int sphi2, int ba, int roml, int romh, int io1, int io2) { if (!io1) { m_bank = !BIT(offset, 0); } }