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(MESS) Hooked ACIA 6850 up to Altair 8800bt [smf]

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This commit is contained in:
smf- 2014-01-09 00:53:59 +00:00
parent f4655e0ae4
commit 5834061747
1 changed files with 21 additions and 43 deletions
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64
src/mess/drivers/altair.c
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@ -20,7 +20,8 @@
#include "emu.h" #include "emu.h"
#include "cpu/i8085/i8085.h" #include "cpu/i8085/i8085.h"
#include "machine/terminal.h" #include "machine/6850acia.h"
#include "machine/serial.h"
#include "imagedev/snapquik.h" #include "imagedev/snapquik.h"
@ -30,17 +31,9 @@ public:
altair_state(const machine_config &mconfig, device_type type, const char *tag) altair_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag), : driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu"), m_maincpu(*this, "maincpu"),
m_terminal(*this, TERMINAL_TAG),
m_ram(*this, "ram"){ } m_ram(*this, "ram"){ }
required_device<cpu_device> m_maincpu; required_device<cpu_device> m_maincpu;
required_device<generic_terminal_device> m_terminal;
DECLARE_READ8_MEMBER(sio_status_r);
DECLARE_READ8_MEMBER(sio_data_r);
DECLARE_READ8_MEMBER(sio_key_status_r);
DECLARE_WRITE8_MEMBER(sio_command_w);
DECLARE_WRITE8_MEMBER(kbd_put);
UINT8 m_term_data;
required_shared_ptr<UINT8> m_ram; required_shared_ptr<UINT8> m_ram;
virtual void machine_reset(); virtual void machine_reset();
DECLARE_QUICKLOAD_LOAD_MEMBER(altair); DECLARE_QUICKLOAD_LOAD_MEMBER(altair);
@ -48,27 +41,6 @@ public:
READ8_MEMBER(altair_state::sio_status_r)
{
return (m_term_data) ? 1 : 2;
}
WRITE8_MEMBER(altair_state::sio_command_w)
{
}
READ8_MEMBER(altair_state::sio_data_r)
{
UINT8 ret = m_term_data;
m_term_data = 0;
return ret;
}
READ8_MEMBER(altair_state::sio_key_status_r)
{
return (m_term_data) ? 0x40 : 0x01;
}
static ADDRESS_MAP_START(altair_mem, AS_PROGRAM, 8, altair_state) static ADDRESS_MAP_START(altair_mem, AS_PROGRAM, 8, altair_state)
ADDRESS_MAP_UNMAP_HIGH ADDRESS_MAP_UNMAP_HIGH
AM_RANGE( 0x0000, 0xfcff ) AM_RAM AM_SHARE("ram") AM_RANGE( 0x0000, 0xfcff ) AM_RAM AM_SHARE("ram")
@ -79,9 +51,9 @@ ADDRESS_MAP_END
static ADDRESS_MAP_START(altair_io, AS_IO, 8, altair_state) static ADDRESS_MAP_START(altair_io, AS_IO, 8, altair_state)
ADDRESS_MAP_UNMAP_HIGH ADDRESS_MAP_UNMAP_HIGH
ADDRESS_MAP_GLOBAL_MASK(0xff) ADDRESS_MAP_GLOBAL_MASK(0xff)
AM_RANGE( 0x00, 0x00 ) AM_READ(sio_key_status_r) // TODO: Remove AM_MIRROR() and use SIO address S0-S7
AM_RANGE( 0x01, 0x01 ) AM_MIRROR(0x10) AM_READ(sio_data_r) AM_DEVWRITE(TERMINAL_TAG, generic_terminal_device, write) AM_RANGE( 0x00, 0x00 ) AM_MIRROR(0x10) AM_DEVREADWRITE("mc6850", acia6850_device, status_read, control_write)
AM_RANGE( 0x10, 0x10 ) AM_READWRITE(sio_status_r,sio_command_w) AM_RANGE( 0x01, 0x01 ) AM_MIRROR(0x10) AM_DEVREADWRITE("mc6850", acia6850_device, data_read, data_write)
ADDRESS_MAP_END ADDRESS_MAP_END
/* Input ports */ /* Input ports */
@ -108,29 +80,35 @@ void altair_state::machine_reset()
{ {
// Set startup addess done by turn-key // Set startup addess done by turn-key
m_maincpu->set_state_int(I8085_PC, 0xFD00); m_maincpu->set_state_int(I8085_PC, 0xFD00);
m_term_data = 0;
} }
WRITE8_MEMBER( altair_state::kbd_put ) //-------------------------------------------------
{ // ACIA6850_INTERFACE( acia0_intf )
m_term_data = data; //-------------------------------------------------
}
static GENERIC_TERMINAL_INTERFACE( terminal_intf ) static ACIA6850_INTERFACE( acia0_intf )
{ {
DEVCB_DRIVER_MEMBER(altair_state, kbd_put) 153600, // TODO: these are set using jumpers S3/S2/S1/S0
153600,
DEVCB_DEVICE_LINE_MEMBER("rs232", serial_port_device, tx),
DEVCB_DEVICE_LINE_MEMBER("rs232", rs232_port_device, rts_w),
DEVCB_NULL
}; };
static MACHINE_CONFIG_START( altair, altair_state ) static MACHINE_CONFIG_START( altair, altair_state )
/* basic machine hardware */ /* basic machine hardware */
MCFG_CPU_ADD("maincpu", I8080, XTAL_2MHz) MCFG_CPU_ADD("maincpu", I8080, XTAL_2MHz)
MCFG_CPU_PROGRAM_MAP(altair_mem) MCFG_CPU_PROGRAM_MAP(altair_mem)
MCFG_CPU_IO_MAP(altair_io) MCFG_CPU_IO_MAP(altair_io)
/* video hardware */ /* video hardware */
MCFG_GENERIC_TERMINAL_ADD(TERMINAL_TAG, terminal_intf) MCFG_ACIA6850_ADD("mc6850", acia0_intf)
MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, "serial_terminal")
MCFG_SERIAL_OUT_RX_HANDLER(DEVWRITELINE("mc6850", acia6850_device, write_rx))
MCFG_RS232_OUT_DCD_HANDLER(DEVWRITELINE("mc6850", acia6850_device, write_dcd))
MCFG_RS232_OUT_CTS_HANDLER(DEVWRITELINE("mc6850", acia6850_device, write_cts))
/* quickload */ /* quickload */
MCFG_QUICKLOAD_ADD("quickload", altair_state, altair, "bin", 0) MCFG_QUICKLOAD_ADD("quickload", altair_state, altair, "bin", 0)