Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-04-23 00:39:36 +03:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

mc68000: Serial support

Browse Source
This commit is contained in:
Dirk Best 2023-05-05 04:05:15 +02:00
parent ee8e97ee65
commit f19bcc05e8
1 changed files with 28 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
src/mame/mc/mc68000.cpp
View File

@ -18,7 +18,6 @@
- Color/brightness levels
- Sound
- Joysticks
- Serial
Notes:
- This computer was described in the "mc" magazine by Franzis Verlag.
@ -32,6 +31,7 @@
#include "emu.h"
#include "bus/centronics/ctronics.h"
#include "bus/mc68000/sysbus.h"
#include "bus/rs232/rs232.h"
#include "cpu/m68000/m68000.h"
#include "machine/6522via.h"
#include "machine/input_merger.h"
@ -70,6 +70,7 @@ public:
m_centronics_latch(*this, "centronics_latch"),
m_centronics_error(*this, "centronics_error"),
m_centronics(*this, "centronics"),
m_serial(*this, "serial"),
m_apm_view(*this, "apm"),
m_eprom(*this, "eprom%u", 0U),
m_switches(*this, "switches")
@ -91,6 +92,7 @@ private:
required_device<output_latch_device> m_centronics_latch;
required_device<input_merger_device> m_centronics_error;
required_device<centronics_device> m_centronics;
required_device<rs232_port_device> m_serial;
memory_view m_apm_view;
required_memory_region_array<2> m_eprom;
required_ioport m_switches;
@ -112,6 +114,7 @@ private:
MC6845_UPDATE_ROW(crtc_update_row);
void lvia_porta_w(uint8_t data);
void uvia_porta_w(uint8_t data);
void addr_decode_w(offs_t offset, uint16_t data, uint16_t mem_mask = ~0);
};
@ -381,6 +384,21 @@ MC6845_UPDATE_ROW( mc68000_state::crtc_update_row )
// MACHINE EMULATION
//**************************************************************************
void mc68000_state::lvia_porta_w(uint8_t data)
{
// 7------- serial cts (read)
// -6------ 40/80 char mode
// --5----- serial tx
// ---4---- serial dtr
// ----3--- ibm/pc keyboard (read)
// -----2-- serial rx (read)
// ------1- cassette write
// -------0 cassette read (read)
m_serial->write_dtr(BIT(data, 4));
m_serial->write_txd(BIT(~data, 5));
}
void mc68000_state::uvia_porta_w(uint8_t data)
{
// 7------- centronics error (read)
@ -450,14 +468,15 @@ void mc68000_state::mc68000(machine_config &config)
m_crtc->set_update_row_callback(FUNC(mc68000_state::crtc_update_row));
m_crtc->out_vsync_callback().set(m_via[1], FUNC(via6522_device::write_ca1));
MOS6522(config, m_via[0], 16_MHz_XTAL / 16); // ic55
MOS6522(config, m_via[0], 16_MHz_XTAL / 2 / 10); // ic55
m_via[0]->irq_handler().set(m_irq3, FUNC(input_merger_device::in_w<0>));
m_via[0]->writepa_handler().set(FUNC(mc68000_state::lvia_porta_w));
MOS6522(config, m_via[1], 16_MHz_XTAL / 16); // ic56
MOS6522(config, m_via[1], 16_MHz_XTAL / 2 / 10); // ic56
m_via[1]->irq_handler().set(m_irq3, FUNC(input_merger_device::in_w<1>));
m_via[1]->writepa_handler().set(FUNC(mc68000_state::uvia_porta_w));
MC68000_SYSBUS(config, m_sysbus, 0);
MC68000_SYSBUS(config, m_sysbus, 16_MHz_XTAL);
m_sysbus->irq1_cb().set_inputline(m_maincpu, INPUT_LINE_IRQ1);
m_sysbus->irq2_cb().set_inputline(m_maincpu, INPUT_LINE_IRQ2);
m_sysbus->irq3_cb().set(m_irq3, FUNC(input_merger_device::in_w<2>));
@ -485,6 +504,11 @@ void mc68000_state::mc68000(machine_config &config)
m_centronics->fault_handler().set(m_centronics_error, FUNC(input_merger_device::in_w<0>));
m_centronics->perror_handler().set(m_centronics_error, FUNC(input_merger_device::in_w<1>)).invert();
RS232_PORT(config, m_serial, default_rs232_devices, nullptr);
m_serial->rxd_handler().set(m_via[0], FUNC(via6522_device::write_ca1));
m_serial->rxd_handler().append(m_via[0], FUNC(via6522_device::write_pa2));
m_serial->cts_handler().set(m_via[0], FUNC(via6522_device::write_pa7));
generic_keyboard_device &kbd(GENERIC_KEYBOARD(config, "kbd", 0));
kbd.set_keyboard_callback(FUNC(mc68000_state::kbd_put));
}