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z80ne: New-style UART handlers; add notes (nw)

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This commit is contained in:
AJR 2018-03-04 21:08:30 -05:00
parent 530ec2199f
commit 28a242d803
3 changed files with 36 additions and 47 deletions
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12
src/mame/drivers/z80ne.cpp
View File

@ -138,7 +138,7 @@ ADDRESS_MAP_END
ADDRESS_MAP_START(z80ne_state::z80ne_io)
ADDRESS_MAP_GLOBAL_MASK(0xff)
AM_RANGE(0xee, 0xee) AM_READWRITE(lx385_data_r, lx385_data_w )
AM_RANGE(0xee, 0xee) AM_DEVREADWRITE("uart", ay31015_device, receive, transmit)
AM_RANGE(0xef, 0xef) AM_READWRITE(lx385_ctrl_r, lx385_ctrl_w )
AM_RANGE(0xf0, 0xff) AM_READWRITE(lx383_r, lx383_w )
ADDRESS_MAP_END
@ -147,7 +147,7 @@ ADDRESS_MAP_START(z80ne_state::z80net_io)
ADDRESS_MAP_GLOBAL_MASK(0xff)
AM_RANGE(0xea, 0xea) AM_READ(lx388_data_r )
AM_RANGE(0xeb, 0xeb) AM_READ(lx388_read_field_sync )
AM_RANGE(0xee, 0xee) AM_READWRITE(lx385_data_r, lx385_data_w )
AM_RANGE(0xee, 0xee) AM_DEVREADWRITE("uart", ay31015_device, receive, transmit)
AM_RANGE(0xef, 0xef) AM_READWRITE(lx385_ctrl_r, lx385_ctrl_w )
AM_RANGE(0xf0, 0xff) AM_READWRITE(lx383_r, lx383_w )
ADDRESS_MAP_END
@ -170,7 +170,7 @@ ADDRESS_MAP_START(z80ne_state::z80netf_io)
AM_RANGE(0xd0, 0xd7) AM_READWRITE(lx390_fdc_r, lx390_fdc_w)
AM_RANGE(0xea, 0xea) AM_READ(lx388_data_r )
AM_RANGE(0xeb, 0xeb) AM_READ(lx388_read_field_sync )
AM_RANGE(0xee, 0xee) AM_READWRITE(lx385_data_r, lx385_data_w )
AM_RANGE(0xee, 0xee) AM_DEVREADWRITE("uart", ay31015_device, receive, transmit)
AM_RANGE(0xef, 0xef) AM_READWRITE(lx385_ctrl_r, lx385_ctrl_w )
AM_RANGE(0xf0, 0xff) AM_READWRITE(lx383_r, lx383_w )
ADDRESS_MAP_END
@ -419,7 +419,7 @@ MACHINE_CONFIG_START(z80ne_state::z80ne)
MCFG_MACHINE_START_OVERRIDE(z80ne_state,z80ne)
MCFG_MACHINE_RESET_OVERRIDE(z80ne_state,z80ne)
MCFG_DEVICE_ADD( "ay_3_1015", AY31015, 0 )
MCFG_DEVICE_ADD( "uart", AY31015, 0 )
MCFG_AY31015_TX_CLOCK(4800.0)
MCFG_AY31015_RX_CLOCK(4800.0)
@ -480,7 +480,7 @@ MACHINE_CONFIG_START(z80ne_state::z80netb)
MCFG_MACHINE_START_OVERRIDE(z80ne_state,z80netb)
MCFG_MACHINE_RESET_OVERRIDE(z80ne_state,z80netb)
MCFG_DEVICE_ADD( "ay_3_1015", AY31015, 0 )
MCFG_DEVICE_ADD( "uart", AY31015, 0 )
MCFG_AY31015_TX_CLOCK(4800.0)
MCFG_AY31015_RX_CLOCK(4800.0)
@ -521,7 +521,7 @@ MACHINE_CONFIG_START(z80ne_state::z80netf)
MCFG_MACHINE_START_OVERRIDE(z80ne_state,z80netf)
MCFG_MACHINE_RESET_OVERRIDE(z80ne_state,z80netf)
MCFG_DEVICE_ADD( "ay_3_1015", AY31015, 0 )
MCFG_DEVICE_ADD( "uart", AY31015, 0 )
MCFG_AY31015_TX_CLOCK(4800.0)
MCFG_AY31015_RX_CLOCK(4800.0)

6
src/mame/includes/z80ne.h
View File

@ -73,7 +73,7 @@ public:
: driver_device(mconfig, type, tag),
m_vdg(*this, "mc6847"),
m_videoram(*this, "videoram"),
m_ay31015(*this, "ay_3_1015"),
m_uart(*this, "uart"),
m_lx388_kr2376(*this, "lx388_kr2376"),
m_maincpu(*this, "z80ne"),
m_floppy0(*this, "wd1771:0"),
@ -109,7 +109,7 @@ public:
optional_device<mc6847_base_device> m_vdg;
optional_shared_ptr<uint8_t> m_videoram;
required_device<ay31015_device> m_ay31015;
required_device<ay31015_device> m_uart;
optional_device<kr2376_device> m_lx388_kr2376;
uint8_t m_lx383_scan_counter;
uint8_t m_lx383_key[LX383_KEYS];
@ -121,9 +121,7 @@ public:
wd17xx_state_t m_wd17xx_state;
DECLARE_READ8_MEMBER(lx383_r);
DECLARE_WRITE8_MEMBER(lx383_w);
DECLARE_READ8_MEMBER(lx385_data_r);
DECLARE_READ8_MEMBER(lx385_ctrl_r);
DECLARE_WRITE8_MEMBER(lx385_data_w);
DECLARE_WRITE8_MEMBER(lx385_ctrl_w);
DECLARE_READ8_MEMBER(lx388_data_r);
DECLARE_READ8_MEMBER(lx388_read_field_sync);

65
src/mame/machine/z80ne.cpp
View File

@ -13,9 +13,6 @@
#include "emu.h"
#include "includes/z80ne.h"
/* Components */
#include "machine/ay31015.h"
/* Devices */
#include "imagedev/flopdrv.h"
@ -48,7 +45,7 @@ TIMER_CALLBACK_MEMBER(z80ne_state::z80ne_cassette_tc)
m_cass_data.input.level = cass_ws;
m_cass_data.input.bit = ((m_cass_data.input.length < m_cass_data.wave_filter) || (m_cass_data.input.length > 0x20)) ? 1 : 0;
m_cass_data.input.length = 0;
m_ay31015->write_si(m_cass_data.input.bit);
m_uart->write_si(m_cass_data.input.bit);
}
m_cass_data.input.level = cass_ws;
@ -63,7 +60,7 @@ TIMER_CALLBACK_MEMBER(z80ne_state::z80ne_cassette_tc)
else
{
m_cass_data.output.level=1;
cass_ws = m_ay31015->so_r();
cass_ws = m_uart->so_r();
m_cass_data.wave_length = cass_ws ? m_cass_data.wave_short : m_cass_data.wave_long;
}
cassette_device_image()->output(m_cass_data.output.level ? -1.0 : +1.0);
@ -275,15 +272,15 @@ MACHINE_RESET_MEMBER(z80ne_state,z80ne_base)
m_cass_data.input.length = 0;
m_cass_data.input.bit = 1;
m_ay31015->write_cs(0);
m_ay31015->write_nb1(1);
m_ay31015->write_nb2(1);
m_ay31015->write_tsb(1);
m_ay31015->write_eps(1);
m_ay31015->write_np(m_io_lx_385->read() & 0x80 ? 1 : 0);
m_ay31015->write_cs(1);
m_ay31015->set_receiver_clock(m_cass_data.speed * 16.0);
m_ay31015->set_transmitter_clock(m_cass_data.speed * 16.0);
m_uart->write_cs(0);
m_uart->write_nb1(1);
m_uart->write_nb2(1);
m_uart->write_tsb(1);
m_uart->write_eps(1);
m_uart->write_np(m_io_lx_385->read() & 0x80 ? 1 : 0);
m_uart->write_cs(1);
m_uart->set_receiver_clock(m_cass_data.speed * 16.0);
m_uart->set_transmitter_clock(m_cass_data.speed * 16.0);
lx385_ctrl_w(m_maincpu->space(AS_PROGRAM), 0, 0);
@ -479,35 +476,29 @@ WRITE8_MEMBER(z80ne_state::lx383_w)
A manchester encoder is used. A flip-flop synchronises input
data on the positive-edge of the clock pulse.
The UART is a RCA CDP1854 CMOS device with pin 2 jumpered to GND to select the
AY-3-1015 compatibility mode. The jumper at P4 can be switched to place 12 V on
pin 2 for an old PMOS UART.
*
*/
READ8_MEMBER(z80ne_state::lx385_data_r)
{
return m_ay31015->get_received_data();
}
READ8_MEMBER(z80ne_state::lx385_ctrl_r)
{
/* set unused bits high */
uint8_t data = 0xc0;
m_ay31015->write_swe(0);
data |= (m_ay31015->or_r( ) ? 0x01 : 0);
data |= (m_ay31015->fe_r( ) ? 0x02 : 0);
data |= (m_ay31015->pe_r( ) ? 0x04 : 0);
data |= (m_ay31015->tbmt_r() ? 0x08 : 0);
data |= (m_ay31015->dav_r( ) ? 0x10 : 0);
data |= (m_ay31015->eoc_r( ) ? 0x20 : 0);
m_ay31015->write_swe(1);
m_uart->write_swe(0);
data |= (m_uart->or_r( ) ? 0x01 : 0);
data |= (m_uart->fe_r( ) ? 0x02 : 0);
data |= (m_uart->pe_r( ) ? 0x04 : 0);
data |= (m_uart->tbmt_r() ? 0x08 : 0);
data |= (m_uart->dav_r( ) ? 0x10 : 0);
data |= (m_uart->eoc_r( ) ? 0x20 : 0);
m_uart->write_swe(1);
return data;
}
WRITE8_MEMBER(z80ne_state::lx385_data_w)
{
m_ay31015->set_transmit_data(data);
}
#define LX385_CASSETTE_MOTOR_MASK ((1<<3)|(1<<4))
WRITE8_MEMBER(z80ne_state::lx385_ctrl_w)
@ -533,21 +524,21 @@ WRITE8_MEMBER(z80ne_state::lx385_ctrl_w)
/* UART Reset and RDAV */
if (uart_reset)
{
m_ay31015->write_xr(1);
m_ay31015->write_xr(0);
m_uart->write_xr(1);
m_uart->write_xr(0);
}
if (uart_rdav)
{
m_ay31015->write_rdav(1);
m_ay31015->write_rdav(0);
m_uart->write_rdav(1);
m_uart->write_rdav(0);
}
if (!changed_bits) return;
/* UART Tx Clock enable/disable */
if (changed_bits & 0x04)
m_ay31015->set_transmitter_clock(uart_tx_clock ? m_cass_data.speed * 16.0 : 0.0);
m_uart->set_transmitter_clock(uart_tx_clock ? m_cass_data.speed * 16.0 : 0.0);
/* motors */
if(changed_bits & 0x18)