// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** Coleco Adam Internal 64KB RAM Expansion emulation **********************************************************************/ #include "emu.h" #include "ram.h" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** DEFINE_DEVICE_TYPE(ADAM_RAM, adam_ram_expansion_device, "adam_ram", "Adam 64KB RAM expansion") //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // adam_ram_expansion_device - constructor //------------------------------------------------- adam_ram_expansion_device::adam_ram_expansion_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, ADAM_RAM, tag, owner, clock), device_adam_expansion_slot_card_interface(mconfig, *this), m_ram(*this, "ram") { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void adam_ram_expansion_device::device_start() { m_ram.allocate(0x10000); } //------------------------------------------------- // adam_bd_r - buffered data read //------------------------------------------------- uint8_t adam_ram_expansion_device::adam_bd_r(address_space &space, offs_t offset, uint8_t data, int bmreq, int biorq, int aux_rom_cs, int cas1, int cas2) { if (!cas2) { data = m_ram[offset]; } return data; } //------------------------------------------------- // adam_bd_w - buffered data write //------------------------------------------------- void adam_ram_expansion_device::adam_bd_w(address_space &space, offs_t offset, uint8_t data, int bmreq, int biorq, int aux_rom_cs, int cas1, int cas2) { if (!cas2) { m_ram[offset] = data; } }