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// 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);
DECLARE_READ8_MEMBER(data_r);
private:
UINT8 m_term_data;
virtual void machine_reset();
required_device<cpu_device> m_maincpu;
required_device<generic_terminal_device> m_terminal;
required_device<i8251_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", GAME_NOT_WORKING | GAME_NO_SOUND_HW )
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