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// license:BSD-3-Clause
// copyright-holders:AJR
/***********************************************************************************************************************************
Skeleton driver for ITT Courier 9216 IBM 3179-compatible color display terminal.
************************************************************************************************************************************/
#include "emu.h"
#include "cpu/m68000/m68008.h"
#include "cpu/mcs48/mcs48.h"
class itt9216_state : public driver_device
{
public:
itt9216_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_program(*this, "program")
, m_chargen(*this, "chargen")
{
}
void itt9216(machine_config &config);
protected:
virtual void machine_start() override;
virtual void machine_reset() override;
private:
u8 ram_rom_r(offs_t offset);
void ram_w(offs_t offset, u8 data);
void mem_map(address_map &map);
required_device<cpu_device> m_maincpu;
required_region_ptr<u8> m_program;
required_region_ptr<u8> m_chargen;
std::unique_ptr<u8[]> m_mainram;
bool m_rom_enabled = true;
};
void itt9216_state::machine_start()
{
m_mainram = make_unique_clear<u8[]>(0x10000);
save_item(NAME(m_rom_enabled));
save_pointer(NAME(m_mainram), 0x10000);
}
void itt9216_state::machine_reset()
{
m_rom_enabled = true;
}
u8 itt9216_state::ram_rom_r(offs_t offset)
{
if (m_rom_enabled)
return m_program[offset & 0x1fff];
else
return m_mainram[offset];
}
void itt9216_state::ram_w(offs_t offset, u8 data)
{
m_mainram[offset] = data;
if (!machine().side_effects_disabled())
m_rom_enabled = false;
}
void itt9216_state::mem_map(address_map &map)
{
map(0x00000, 0x0ffff).rw(FUNC(itt9216_state::ram_rom_r), FUNC(itt9216_state::ram_w));
map(0x10000, 0x11fff).ram();
map(0x58000, 0x59fff).rom().region("program", 0);
map(0x62000, 0x62fff).ram();
}
static INPUT_PORTS_START(itt9216)
INPUT_PORTS_END
void itt9216_state::itt9216(machine_config &config)
{
M68008(config, m_maincpu, 8000000); // clock unknown
m_maincpu->set_addrmap(AS_PROGRAM, &itt9216_state::mem_map);
I8741A(config, "upi", 6000000).set_disable(); // clock unknown
}
// XTALs: 38.080 MHz (U7), 11.250(?) MHz (U1)
// ICs on main board: MC68008P8 (U33), 701188-001 PLCC ASIC (U58), empty PLCC (U45), beeper
// ICs on keyboard simulator board: 700881-001 PLCC ASIC (U12), DP8340N (U16), DP8341N (U15), D8741A (U1)
ROM_START(itt9216)
ROM_REGION(0x2000, "program", 0)
ROM_LOAD("174054-007.u52", 0x0000, 0x2000, CRC(be1f85c8) SHA1(8c44ff6166c43b524f41133053fa82f5c48047d8))
ROM_REGION(0x400, "upi", 0)
ROM_LOAD("174065-003.u1", 0x000, 0x400, NO_DUMP)
ROM_REGION(0x2000, "chargen", 0)
ROM_LOAD("174055-004.u40", 0x0000, 0x2000, CRC(c8611425) SHA1(31fbdd6ff72a96c59277b6edac9a6360f6e1e49e))
ROM_END
COMP(1986, itt9216, 0, 0, itt9216, itt9216, itt9216_state, empty_init, "ITT Courier", "ITT 9216-X", MACHINE_IS_SKELETON)
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