// license:BSD-3-Clause // copyright-holders:Robbbert /*************************************************************************** Jade JGZ80 Single board computer on a S100 card. 2013-09-12 Skeleton driver. No info found as yet. It takes about 8 seconds to start up. Type HE to get a list of commands. ****************************************************************************/ #include "emu.h" #include "cpu/z80/z80.h" #include "machine/i8251.h" #include "machine/terminal.h" #define TERMINAL_TAG "terminal" class jade_state : public driver_device { public: jade_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag), m_maincpu(*this, "maincpu"), m_terminal(*this, TERMINAL_TAG), m_uart(*this, "uart") { } DECLARE_WRITE8_MEMBER(kbd_put); DECLARE_READ8_MEMBER(keyin_r); DECLARE_READ8_MEMBER(status_r); private: UINT8 m_term_data; virtual void machine_reset() override; required_device m_maincpu; required_device m_terminal; required_device m_uart; }; static ADDRESS_MAP_START(jade_mem, AS_PROGRAM, 8, jade_state) ADDRESS_MAP_UNMAP_HIGH AM_RANGE(0x0000, 0x07ff) AM_ROM AM_REGION("roms", 0) AM_RANGE(0xe000, 0xffff) AM_RAM ADDRESS_MAP_END static ADDRESS_MAP_START(jade_io, AS_IO, 8, jade_state) ADDRESS_MAP_UNMAP_HIGH ADDRESS_MAP_GLOBAL_MASK(0xff) //AM_RANGE(0x30, 0x30) AM_DEVREADWRITE("uart", i8251_device, data_r, data_w) //AM_RANGE(0x32, 0x32) AM_DEVREADWRITE("uart", i8251_device, status_r, control_w) AM_RANGE(0x30, 0x30) AM_READ(keyin_r) AM_DEVWRITE(TERMINAL_TAG, generic_terminal_device, write) AM_RANGE(0x32, 0x32) AM_READ(status_r) ADDRESS_MAP_END /* Input ports */ static INPUT_PORTS_START( jade ) INPUT_PORTS_END READ8_MEMBER( jade_state::keyin_r ) { UINT8 ret = m_term_data; m_term_data = 0; return (ret) ? ret : 0x13; } READ8_MEMBER( jade_state::status_r ) { return (m_term_data) ? 5 : 4; } WRITE8_MEMBER( jade_state::kbd_put ) { m_term_data = data; } void jade_state::machine_reset() { m_term_data = 0; } static MACHINE_CONFIG_START( jade, jade_state ) /* basic machine hardware */ MCFG_CPU_ADD("maincpu",Z80, XTAL_4MHz) MCFG_CPU_PROGRAM_MAP(jade_mem) MCFG_CPU_IO_MAP(jade_io) /* video hardware */ MCFG_DEVICE_ADD(TERMINAL_TAG, GENERIC_TERMINAL, 0) MCFG_GENERIC_TERMINAL_KEYBOARD_CB(WRITE8(jade_state, kbd_put)) /* Devices */ MCFG_DEVICE_ADD("uart", I8251, 0) MACHINE_CONFIG_END /* ROM definition */ ROM_START( jade ) ROM_REGION( 0x800, "roms", 0 ) ROM_LOAD( "jgz80.rom", 0x0000, 0x0800, CRC(90c4a1ef) SHA1(8a93a11051cc27f3edca24f0f4297ebe0099964e) ) ROM_END /* Driver */ /* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ COMP( 19??, jade, 0, 0, jade, jade, driver_device, 0, "Jade", "JGZ80", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW )