diff options
Diffstat (limited to 'src/devices/bus/ql/cst_q_plus4.c')
-rw-r--r-- | src/devices/bus/ql/cst_q_plus4.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/src/devices/bus/ql/cst_q_plus4.c b/src/devices/bus/ql/cst_q_plus4.c new file mode 100644 index 00000000000..76f5a046566 --- /dev/null +++ b/src/devices/bus/ql/cst_q_plus4.c @@ -0,0 +1,144 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder +/********************************************************************** + + CST Q+4 emulation + +**********************************************************************/ + +#include "cst_q_plus4.h" + + + +//************************************************************************** +// MACROS/CONSTANTS +//************************************************************************** + +#define MC6821_TAG "mc6821" + + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +const device_type CST_Q_PLUS4 = &device_creator<cst_q_plus4_t>; + + +//------------------------------------------------- +// ROM( cst_q_plus4 ) +//------------------------------------------------- + +ROM_START( cst_q_plus4 ) + ROM_REGION( 0x2000, "rom", 0 ) + ROM_LOAD( "qplus4.rom", 0x0000, 0x2000, CRC(53a078fb) SHA1(53d6828c1b6ba052b862fd80ac8a364b0078330d) ) +ROM_END + + +//------------------------------------------------- +// rom_region - device-specific ROM region +//------------------------------------------------- + +const rom_entry *cst_q_plus4_t::device_rom_region() const +{ + return ROM_NAME( cst_q_plus4 ); +} + + +//------------------------------------------------- +// MACHINE_CONFIG_FRAGMENT( cst_q_plus4 ) +//------------------------------------------------- + +static MACHINE_CONFIG_FRAGMENT( cst_q_plus4 ) + MCFG_DEVICE_ADD(MC6821_TAG, PIA6821, 0) + + MCFG_QL_EXPANSION_SLOT_ADD("exp1", ql_expansion_cards, NULL) + MCFG_QL_EXPANSION_SLOT_EXTINTL_CALLBACK(WRITELINE(cst_q_plus4_t, exp1_extintl_w)) + + MCFG_QL_EXPANSION_SLOT_ADD("exp2", ql_expansion_cards, NULL) + MCFG_QL_EXPANSION_SLOT_EXTINTL_CALLBACK(WRITELINE(cst_q_plus4_t, exp2_extintl_w)) + + MCFG_QL_EXPANSION_SLOT_ADD("exp3", ql_expansion_cards, NULL) + MCFG_QL_EXPANSION_SLOT_EXTINTL_CALLBACK(WRITELINE(cst_q_plus4_t, exp3_extintl_w)) + + MCFG_QL_EXPANSION_SLOT_ADD("exp4", ql_expansion_cards, NULL) + MCFG_QL_EXPANSION_SLOT_EXTINTL_CALLBACK(WRITELINE(cst_q_plus4_t, exp4_extintl_w)) +MACHINE_CONFIG_END + + +//------------------------------------------------- +// machine_config_additions - device-specific +// machine configurations +//------------------------------------------------- + +machine_config_constructor cst_q_plus4_t::device_mconfig_additions() const +{ + return MACHINE_CONFIG_NAME( cst_q_plus4 ); +} + + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// cst_q_plus4_t - constructor +//------------------------------------------------- + +cst_q_plus4_t::cst_q_plus4_t(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, CST_Q_PLUS4, "CST Q+4", tag, owner, clock, "ql_qplus4", __FILE__), + device_ql_expansion_card_interface(mconfig, *this), + m_exp1(*this, "exp1"), + m_exp2(*this, "exp2"), + m_exp3(*this, "exp3"), + m_exp4(*this, "exp4"), + m_rom(*this, "rom"), + m_exp1_extinl(CLEAR_LINE), + m_exp2_extinl(CLEAR_LINE), + m_exp3_extinl(CLEAR_LINE), + m_exp4_extinl(CLEAR_LINE) +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void cst_q_plus4_t::device_start() +{ +} + + +//------------------------------------------------- +// read - +//------------------------------------------------- + +UINT8 cst_q_plus4_t::read(address_space &space, offs_t offset, UINT8 data) +{ + if (offset >= 0xc000 && offset < 0xc200) + { + data = m_rom->base()[offset & 0x1fff]; + } + + data = m_exp1->read(space, offset, data); + data = m_exp2->read(space, offset, data); + data = m_exp3->read(space, offset, data); + data = m_exp4->read(space, offset, data); + + return data; +} + + +//------------------------------------------------- +// write - +//------------------------------------------------- + +void cst_q_plus4_t::write(address_space &space, offs_t offset, UINT8 data) +{ + m_exp1->write(space, offset, data); + m_exp2->write(space, offset, data); + m_exp3->write(space, offset, data); + m_exp4->write(space, offset, data); +} |