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meritum2: added centronics printer from PR #5854.

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This commit is contained in:
Robbbert 2021-06-12 18:14:26 +10:00
parent 4ca10ad80b
commit 8519af54de
1 changed files with 36 additions and 1 deletions
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37
src/mame/drivers/meritum.cpp
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@ -56,6 +56,7 @@ For Model III:
#include "emu.h"
#include "includes/trs80.h"
#include "bus/centronics/ctronics.h"
#include "machine/input_merger.h"
#include "machine/i8251.h"
#include "machine/i8255.h"
@ -68,6 +69,8 @@ public:
meritum_state(const machine_config &mconfig, device_type type, const char *tag)
: trs80_state(mconfig, type, tag)
, m_screen(*this, "screen")
, m_centronics(*this, "centronics")
, m_nmigate(*this, "nmigate")
{ }
void meritum1(machine_config &config);
@ -83,10 +86,32 @@ private:
void io_map(address_map &map);
void mem_map2(address_map &map);
void io_map2(address_map &map);
void mainppi_portb_w(u8);
void mainppi_portc_w(u8);
required_device<screen_device> m_screen;
optional_device<centronics_device> m_centronics;
required_device<input_merger_device> m_nmigate;
};
void meritum_state::mainppi_portc_w(u8 data)
{
m_nmigate->in_w<0>(!BIT(data, 7)); // negated PC7 => NMI
m_centronics->write_strobe(BIT(data, 1)); // PC1 = STROBE (centronics)
}
void meritum_state::mainppi_portb_w(u8 data)
{
m_centronics->write_data0(BIT(data, 0));
m_centronics->write_data1(BIT(data, 1));
m_centronics->write_data2(BIT(data, 2));
m_centronics->write_data3(BIT(data, 3));
m_centronics->write_data4(BIT(data, 4));
m_centronics->write_data5(BIT(data, 5));
m_centronics->write_data6(BIT(data, 6));
m_centronics->write_data7(BIT(data, 7));
}
void meritum_state::mem_map(address_map &map)
{
map(0x0000, 0x37ff).rom();
@ -332,7 +357,17 @@ void meritum_state::meritum1(machine_config &config)
pit.out_handler<2>().set_inputline(m_maincpu, INPUT_LINE_NMI);
i8255_device &mainppi(I8255(config, "mainppi")); // parallel interface
mainppi.out_pc_callback().set("nmigate", FUNC(input_merger_device::in_w<0>)).bit(7).invert();
mainppi.out_pc_callback().set(FUNC(meritum_state::mainppi_portc_w));
mainppi.out_pb_callback().set(FUNC(meritum_state::mainppi_portb_w));
/* parallel printer */
CENTRONICS(config, m_centronics, centronics_devices, "printer");
m_centronics->set_data_input_buffer("cent_data_in");
m_centronics->ack_handler().set("mainppi", FUNC(i8255_device::pc2_w));
INPUT_BUFFER(config, "cent_data_in");
output_latch_device &cent_data_out(OUTPUT_LATCH(config, "cent_data_out"));
m_centronics->set_output_latch(cent_data_out);
PIT8253(config, "audiopit", 0); // optional audio interface