diff options
Diffstat (limited to 'src/devices/bus/iq151/rom.cpp')
-rw-r--r-- | src/devices/bus/iq151/rom.cpp | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/src/devices/bus/iq151/rom.cpp b/src/devices/bus/iq151/rom.cpp new file mode 100644 index 00000000000..4505732486c --- /dev/null +++ b/src/devices/bus/iq151/rom.cpp @@ -0,0 +1,229 @@ +// license:BSD-3-Clause +// copyright-holders:Sandro Ronco +/*************************************************************************** + + IQ151 rom cartridge emulation + + Supported cart: + - BASIC6 + - BASICG + - AMOS OS (3 cart) + +***************************************************************************/ + +#include "emu.h" +#include "rom.h" + +/*************************************************************************** + IMPLEMENTATION +***************************************************************************/ + +ROM_START( iq151_rom ) + ROM_REGION(0x4000, "rom", ROMREGION_ERASEFF) +ROM_END + + +//************************************************************************** +// GLOBAL VARIABLES +//************************************************************************** + +const device_type IQ151_BASIC6 = &device_creator<iq151_basic6_device>; +const device_type IQ151_BASICG = &device_creator<iq151_basicg_device>; +const device_type IQ151_AMOS1 = &device_creator<iq151_amos1_device>; +const device_type IQ151_AMOS2 = &device_creator<iq151_amos2_device>; +const device_type IQ151_AMOS3 = &device_creator<iq151_amos3_device>; + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// iq151_rom_device - constructor +//------------------------------------------------- + +iq151_rom_device::iq151_rom_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source) : + device_t(mconfig, type, name, tag, owner, clock, shortname, source), + device_iq151cart_interface(mconfig, *this) +{ +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void iq151_rom_device::device_start() +{ + m_rom = (UINT8*)memregion("rom")->base(); +} + +//------------------------------------------------- +// rom_region - device-specific ROM region +//------------------------------------------------- + +const rom_entry *iq151_rom_device::device_rom_region() const +{ + return ROM_NAME( iq151_rom ); +} + +/*------------------------------------------------- + get_cart_base +-------------------------------------------------*/ + +UINT8* iq151_rom_device::get_cart_base() +{ + return m_rom; +} + + +//************************************************************************** +// BASIC6 +//************************************************************************** + +//------------------------------------------------- +// iq151_basic6_device - constructor +//------------------------------------------------- + +iq151_basic6_device::iq151_basic6_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) + : iq151_rom_device(mconfig, IQ151_BASIC6, "IQ151 BASIC6", tag, owner, clock, "iq151_basic6", __FILE__) +{ +} + + +//------------------------------------------------- +// read +//------------------------------------------------- + +void iq151_basic6_device::read(offs_t offset, UINT8 &data) +{ + if (offset >= 0xc800 && offset < 0xe800) + data = m_rom[offset - 0xc800]; +} + + +//************************************************************************** +// BASICG +//************************************************************************** + +//------------------------------------------------- +// iq151_basicg_device - constructor +//------------------------------------------------- + +iq151_basicg_device::iq151_basicg_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) + : iq151_rom_device(mconfig, IQ151_BASICG, "IQ151 BASICG", tag, owner, clock, "iq151_basicg", __FILE__) +{ +} + +/*------------------------------------------------- + read +-------------------------------------------------*/ + +void iq151_basicg_device::read(offs_t offset, UINT8 &data) +{ + if (offset >= 0xb000 && offset < 0xc000) + data = m_rom[offset & 0x0fff]; + else if (offset >= 0xc800 && offset < 0xe800) + data = m_rom[offset - 0xb800]; +} + + +//************************************************************************** +// AMOS cartridge 1 +//************************************************************************** + +//------------------------------------------------- +// iq151_amos1_device - constructor +//------------------------------------------------- + +iq151_amos1_device::iq151_amos1_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) + : iq151_rom_device(mconfig, IQ151_AMOS1, "IQ151 AMOS cart 1", tag, owner, clock, "iq151_amos1", __FILE__), + m_active(true) +{ +} + +/*------------------------------------------------- + read +-------------------------------------------------*/ + +void iq151_amos1_device::read(offs_t offset, UINT8 &data) +{ + if (offset >= 0x8000 && offset < 0xc000 && m_active) + data = m_rom[offset & 0x3fff]; +} + +/*------------------------------------------------- + IO write +-------------------------------------------------*/ + +void iq151_amos1_device::io_write(offs_t offset, UINT8 data) +{ + if (offset >= 0xec && offset < 0xf0) + m_active = data == 0x00; +} + +//************************************************************************** +// AMOS cartridge 2 +//************************************************************************** + +//------------------------------------------------- +// iq151_amos2_device - constructor +//------------------------------------------------- + +iq151_amos2_device::iq151_amos2_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) + : iq151_rom_device(mconfig, IQ151_AMOS2, "IQ151 AMOS cart 2", tag, owner, clock, "iq151_amos2", __FILE__), + m_active(false) +{ +} + +/*------------------------------------------------- + read +-------------------------------------------------*/ + +void iq151_amos2_device::read(offs_t offset, UINT8 &data) +{ + if (offset >= 0x8000 && offset < 0xc000 && m_active) + data = m_rom[offset & 0x3fff]; +} + +/*------------------------------------------------- + IO write +-------------------------------------------------*/ + +void iq151_amos2_device::io_write(offs_t offset, UINT8 data) +{ + if (offset >= 0xec && offset < 0xf0) + m_active = data == 0x01; +} + +//************************************************************************** +// AMOS cartridge 3 +//************************************************************************** + +//------------------------------------------------- +// iq151_amos3_device - constructor +//------------------------------------------------- + +iq151_amos3_device::iq151_amos3_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) + : iq151_rom_device(mconfig, IQ151_AMOS3, "IQ151 AMOS cart 3", tag, owner, clock, "iq151_amos3", __FILE__), + m_active(true) +{ +} + +/*------------------------------------------------- + read +-------------------------------------------------*/ + +void iq151_amos3_device::read(offs_t offset, UINT8 &data) +{ + if (offset >= 0x8000 && offset < 0xc000 && m_active) + data = m_rom[offset & 0x3fff]; +} + +/*------------------------------------------------- + IO write +-------------------------------------------------*/ + +void iq151_amos3_device::io_write(offs_t offset, UINT8 data) +{ + if (offset >= 0xec && offset < 0xf0) + m_active = data == 0x02; +} |