From 08d078b862fbcd997e7576317637dbfd93347393 Mon Sep 17 00:00:00 2001 From: AJR Date: Sun, 4 Mar 2018 20:26:50 -0500 Subject: [PATCH] zephyr: Add UART and RS232 port (nw) --- src/mame/drivers/zms8085.cpp | 42 +++++++++++++++++++++++++++++++++++- 1 file changed, 41 insertions(+), 1 deletion(-) diff --git a/src/mame/drivers/zms8085.cpp b/src/mame/drivers/zms8085.cpp index 2095d0d8a44..6f367efdbfd 100644 --- a/src/mame/drivers/zms8085.cpp +++ b/src/mame/drivers/zms8085.cpp @@ -15,6 +15,8 @@ hardware, since no schematics or manuals have been found. #include "emu.h" #include "cpu/i8085/i8085.h" +#include "bus/rs232/rs232.h" +#include "machine/ay31015.h" #include "screen.h" class zms8085_state : public driver_device @@ -23,6 +25,8 @@ public: zms8085_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") + , m_uart(*this, "uart") + , m_rs232(*this, "rs232") , m_screen(*this, "screen") , m_mainram(*this, "mainram") , m_p_chargen(*this, "chargen") @@ -31,12 +35,17 @@ public: u32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect); DECLARE_READ8_MEMBER(special_r); + DECLARE_READ8_MEMBER(uart_status_r); + + virtual void machine_start() override; void zephyr(machine_config &config); void io_map(address_map &map); void mem_map(address_map &map); private: required_device m_maincpu; + required_device m_uart; + required_device m_rs232; required_device m_screen; required_shared_ptr m_mainram; required_region_ptr m_p_chargen; @@ -72,6 +81,11 @@ READ8_MEMBER(zms8085_state::special_r) return 0x40; } +READ8_MEMBER(zms8085_state::uart_status_r) +{ + return m_uart->tbmt_r() | (m_uart->dav_r() << 1); +} + ADDRESS_MAP_START(zms8085_state::mem_map) AM_RANGE(0x0000, 0x0fff) AM_ROM AM_REGION("maincpu", 0) AM_WRITENOP @@ -79,13 +93,29 @@ ADDRESS_MAP_START(zms8085_state::mem_map) ADDRESS_MAP_END ADDRESS_MAP_START(zms8085_state::io_map) - AM_RANGE(0x61, 0x61) AM_READ(special_r) + AM_RANGE(0x61, 0x61) AM_READ(special_r) AM_DEVWRITE("uart", ay51013_device, transmit) + AM_RANGE(0x62, 0x62) AM_DEVREAD("uart", ay51013_device, receive) + AM_RANGE(0x63, 0x63) AM_READ(uart_status_r) AM_RANGE(0x68, 0x68) AM_WRITENOP ADDRESS_MAP_END + static INPUT_PORTS_START( zephyr ) INPUT_PORTS_END + +void zms8085_state::machine_start() +{ + m_uart->write_swe(0); + + m_uart->write_nb1(1); + m_uart->write_nb2(1); + m_uart->write_np(1); + m_uart->write_eps(1); + m_uart->write_tsb(0); + m_uart->write_cs(1); +} + MACHINE_CONFIG_START(zms8085_state::zephyr) MCFG_CPU_ADD("maincpu", I8085A, XTAL(15'582'000) / 2) // divider not verified MCFG_CPU_PROGRAM_MAP(mem_map) @@ -94,6 +124,16 @@ MACHINE_CONFIG_START(zms8085_state::zephyr) MCFG_SCREEN_ADD("screen", RASTER) MCFG_SCREEN_RAW_PARAMS(XTAL(15'582'000), 980, 0, 800, 265, 0, 250) MCFG_SCREEN_UPDATE_DRIVER(zms8085_state, screen_update) + + MCFG_DEVICE_ADD("uart", AY51013, 0) // SMC COM2017 + MCFG_AY51013_TX_CLOCK(153600) // should actually be configurable somehow + MCFG_AY51013_RX_CLOCK(153600) + MCFG_AY51013_READ_SI_CB(DEVREADLINE("rs232", rs232_port_device, rxd_r)) + MCFG_AY51013_WRITE_SO_CB(DEVWRITELINE("rs232", rs232_port_device, write_txd)) + MCFG_AY51013_WRITE_DAV_CB(INPUTLINE("maincpu", I8085_RST65_LINE)) + MCFG_AY51013_AUTO_RDAV(true) + + MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, nullptr) MACHINE_CONFIG_END /**************************************************************************************************************