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(nw) mits680b : added uart; cm1800 : small cleanup

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This commit is contained in:
Robbbert 2017-09-16 22:32:57 +10:00
parent 9738f03e54
commit 3ab7403225
2 changed files with 34 additions and 44 deletions
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18
src/mame/drivers/cm1800.cpp
View File

@ -37,23 +37,21 @@ to be a save command.
#include "cpu/i8085/i8085.h"
#include "machine/terminal.h"
#define TERMINAL_TAG "terminal"
class cm1800_state : public driver_device
{
public:
cm1800_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_terminal(*this, TERMINAL_TAG)
, m_terminal(*this, "terminal")
, m_maincpu(*this, "maincpu")
{
}
{ }
DECLARE_READ8_MEMBER( term_status_r );
DECLARE_READ8_MEMBER( term_r );
void kbd_put(u8 data);
protected:
private:
virtual void machine_reset() override;
uint8_t m_term_data;
@ -81,14 +79,15 @@ void cm1800_state::kbd_put(u8 data)
static ADDRESS_MAP_START(cm1800_mem, AS_PROGRAM, 8, cm1800_state)
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE( 0x0000, 0x07ff ) AM_ROM
AM_RANGE( 0x0000, 0x07ff ) AM_ROM AM_REGION("roms", 0)
AM_RANGE( 0x0800, 0xffff ) AM_RAM
ADDRESS_MAP_END
static ADDRESS_MAP_START( cm1800_io , AS_IO, 8, cm1800_state)
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE(0x00, 0x00) AM_READ(term_r) AM_DEVWRITE(TERMINAL_TAG, generic_terminal_device, write)
AM_RANGE(0x00, 0x00) AM_READ(term_r) AM_DEVWRITE("terminal", generic_terminal_device, write)
AM_RANGE(0x01, 0x01) AM_READ(term_status_r)
AM_RANGE(0x03, 0x03) // unknown uart, initialisation bytes 08 then 48, so not 6551.
ADDRESS_MAP_END
/* Input ports */
@ -106,15 +105,14 @@ static MACHINE_CONFIG_START( cm1800 )
MCFG_CPU_PROGRAM_MAP(cm1800_mem)
MCFG_CPU_IO_MAP(cm1800_io)
/* video hardware */
MCFG_DEVICE_ADD(TERMINAL_TAG, GENERIC_TERMINAL, 0)
MCFG_DEVICE_ADD("terminal", GENERIC_TERMINAL, 0)
MCFG_GENERIC_TERMINAL_KEYBOARD_CB(PUT(cm1800_state, kbd_put))
MACHINE_CONFIG_END
/* ROM definition */
ROM_START( cm1800 )
ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
ROM_REGION( 0x800, "roms", ROMREGION_ERASEFF )
ROM_LOAD( "cm1800.rom", 0x0000, 0x0800, CRC(85d71d25) SHA1(42dc87d2eddc2906fa26d35db88a2e29d50fb481) )
ROM_END

60
src/mame/drivers/mits680b.cpp
View File

@ -16,14 +16,15 @@ P this does a rti and causes a momentary crash. Weird.
ToDo:
- Find out what uart is used (not 8251, not 6551, not Z80SIO) and hook it up.
Initialisation consists of writing 03 to F000.
****************************************************************************/
#include "emu.h"
#include "cpu/m6800/m6800.h"
#include "machine/terminal.h"
#include "machine/6850acia.h"
#include "bus/rs232/rs232.h"
#include "machine/clock.h"
class mits680b_state : public driver_device
@ -32,21 +33,17 @@ public:
mits680b_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_terminal(*this, "terminal")
, m_acia(*this, "acia")
{
}
DECLARE_READ8_MEMBER(terminal_status_r);
DECLARE_READ8_MEMBER(terminal_r);
DECLARE_READ8_MEMBER(status_check_r);
void kbd_put(u8 data);
DECLARE_WRITE_LINE_MEMBER(clock_tick);
protected:
private:
virtual void machine_reset() override;
required_device<cpu_device> m_maincpu;
required_device<generic_terminal_device> m_terminal;
uint8_t m_term_data;
required_device<acia6850_device> m_acia;
};
READ8_MEMBER( mits680b_state::status_check_r )
@ -54,26 +51,20 @@ READ8_MEMBER( mits680b_state::status_check_r )
return 0; // crashes at start if bit 7 high
}
READ8_MEMBER( mits680b_state::terminal_status_r )
WRITE_LINE_MEMBER( mits680b_state::clock_tick )
{
return (m_term_data) ? 3 : 2;
}
READ8_MEMBER( mits680b_state::terminal_r )
{
uint8_t ret = m_term_data;
m_term_data = 0;
return ret;
m_acia->write_txc(state);
m_acia->write_rxc(state);
}
static ADDRESS_MAP_START(mits680b_mem, AS_PROGRAM, 8, mits680b_state)
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE( 0x0000, 0x03ff ) AM_RAM // 1024 bytes RAM
AM_RANGE( 0xf000, 0xf000 ) AM_READ(terminal_status_r)
AM_RANGE( 0xf001, 0xf001 ) AM_READ(terminal_r) AM_DEVWRITE("terminal", generic_terminal_device, write)
AM_RANGE( 0xf002, 0xf002 ) AM_READ(status_check_r)
AM_RANGE( 0xff00, 0xffff ) AM_ROM AM_REGION("roms", 0)
AM_RANGE(0x0000, 0x03ff) AM_RAM // 1024 bytes RAM
AM_RANGE(0xf000, 0xf000) AM_DEVREADWRITE("acia", acia6850_device, status_r, control_w)
AM_RANGE(0xf001, 0xf001) AM_DEVREADWRITE("acia", acia6850_device, data_r, data_w)
AM_RANGE(0xf002, 0xf002) AM_READ(status_check_r)
AM_RANGE(0xff00, 0xffff) AM_ROM AM_REGION("roms", 0)
ADDRESS_MAP_END
/* Input ports */
@ -83,12 +74,6 @@ INPUT_PORTS_END
void mits680b_state::machine_reset()
{
m_term_data = 0;
}
void mits680b_state::kbd_put(u8 data)
{
m_term_data = data;
}
static MACHINE_CONFIG_START( mits680b )
@ -96,9 +81,16 @@ static MACHINE_CONFIG_START( mits680b )
MCFG_CPU_ADD("maincpu", M6800, XTAL_1MHz / 2)
MCFG_CPU_PROGRAM_MAP(mits680b_mem)
/* video hardware */
MCFG_DEVICE_ADD("terminal", GENERIC_TERMINAL, 0)
MCFG_GENERIC_TERMINAL_KEYBOARD_CB(PUT(mits680b_state, kbd_put))
MCFG_DEVICE_ADD("acia", ACIA6850, 0)
MCFG_ACIA6850_TXD_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_txd))
MCFG_ACIA6850_RTS_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_rts))
MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, "terminal")
MCFG_RS232_RXD_HANDLER(DEVWRITELINE("acia", acia6850_device, write_rxd))
MCFG_RS232_CTS_HANDLER(DEVWRITELINE("acia", acia6850_device, write_cts))
MCFG_DEVICE_ADD("uart_clock", CLOCK, 153600)
MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE(mits680b_state, clock_tick))
MACHINE_CONFIG_END
/* ROM definition */