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mc68000: Centronics support

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This commit is contained in:
Dirk Best 2023-05-03 13:04:12 +02:00
parent da23718c91
commit 70a2c92f68
1 changed files with 26 additions and 2 deletions
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28
src/mame/mc/mc68000.cpp
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@ -18,7 +18,6 @@
- Color/brightness levels
- Sound
- Joysticks
- Centronics
- Serial
Notes:
@ -31,6 +30,7 @@
****************************************************************************/
#include "emu.h"
#include "bus/centronics/ctronics.h"
#include "bus/mc68000/sysbus.h"
#include "cpu/m68000/m68000.h"
#include "machine/6522via.h"
@ -67,6 +67,9 @@ public:
m_crtc(*this, "crtc"),
m_via(*this, "via%u", 0U),
m_sysbus(*this, "sysbus"),
m_centronics_latch(*this, "centronics_latch"),
m_centronics_error(*this, "centronics_error"),
m_centronics(*this, "centronics"),
m_apm_view(*this, "apm"),
m_eprom(*this, "eprom%u", 0U),
m_switches(*this, "switches")
@ -85,6 +88,9 @@ private:
required_device<mc6845_device> m_crtc;
required_device_array<via6522_device, 2> m_via;
required_device<mc68000_sysbus_device> m_sysbus;
required_device<output_latch_device> m_centronics_latch;
required_device<input_merger_device> m_centronics_error;
required_device<centronics_device> m_centronics;
memory_view m_apm_view;
required_memory_region_array<2> m_eprom;
required_ioport m_switches;
@ -263,7 +269,7 @@ void mc68000_state::memory_w(offs_t offset, uint16_t data, uint16_t mem_mask)
case 3:
if (ACCESSING_BITS_8_15 && (BIT(offset, 1) == 0))
{
LOGMASKED(LOG_IO_WRITE, "Centronics latch write\n");
m_centronics_latch->write(data >> 8);
// a write here also selects switch 0 to be read from cb1
m_via[1]->write_cb1(1);
@ -377,7 +383,14 @@ MC6845_UPDATE_ROW( mc68000_state::crtc_update_row )
void mc68000_state::uvia_porta_w(uint8_t data)
{
// 7------- centronics error (read)
// -6------ centronics strobe
// --5----- joystick control
// ---43--- color helper bits
// -----210 video base address
m_uvia_porta = data;
m_centronics->write_strobe(BIT(data, 6));
}
void mc68000_state::addr_decode_w(offs_t offset, uint16_t data, uint16_t mem_mask)
@ -461,6 +474,17 @@ void mc68000_state::mc68000(machine_config &config)
MC68000_SYSBUS_SLOT(config, "sysbus:6", mc68000_sysbus_cards, nullptr);
MC68000_SYSBUS_SLOT(config, "sysbus:7", mc68000_sysbus_cards, nullptr);
OUTPUT_LATCH(config, m_centronics_latch); // ic85
INPUT_MERGER_ANY_LOW(config, m_centronics_error);
m_centronics_error->output_handler().set(m_via[1], FUNC(via6522_device::write_pa7)).invert();
CENTRONICS(config, m_centronics, centronics_devices, "printer");
m_centronics->set_output_latch(*m_centronics_latch);
m_centronics->ack_handler().set(m_via[1], FUNC(via6522_device::write_ca2)); // alternatively connected to busy
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();
generic_keyboard_device &kbd(GENERIC_KEYBOARD(config, "kbd", 0));
kbd.set_keyboard_callback(FUNC(mc68000_state::kbd_put));
}