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v102.cpp
191 lines (145 loc) · 6.35 KB
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v102.cpp
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// license:BSD-3-Clause
// copyright-holders:AJR
/***********************************************************************************************************************************
Skeleton driver for Visual 102 display terminal.
************************************************************************************************************************************/
#include "emu.h"
#include "bus/rs232/rs232.h"
#include "cpu/z80/z80.h"
#include "machine/eeprompar.h"
#include "machine/input_merger.h"
#include "machine/i8251.h"
#include "machine/i8255.h"
#include "machine/pit8253.h"
#include "machine/z80sio.h"
//#include "video/crt9006.h"
#include "video/crt9007.h"
//#include "video/crt9021.h"
#include "screen.h"
#include "v102_kbd.h"
namespace {
class v102_state : public driver_device
{
public:
v102_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_mpsc(*this, "mpsc")
, m_chargen(*this, "chargen")
{ }
void v102(machine_config &config);
protected:
virtual void machine_start() override;
private:
u32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
void hs_w(int state);
void io_map(address_map &map);
void mem_map(address_map &map);
required_device<cpu_device> m_maincpu;
required_device<upd7201_device> m_mpsc;
required_region_ptr<u8> m_chargen;
bool m_hs_state = false;
bool m_kb_clock = false;
};
u32 v102_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
return 0;
}
void v102_state::hs_w(int state)
{
if (state && !m_hs_state)
{
m_kb_clock = !m_kb_clock;
m_mpsc->txca_w(m_kb_clock);
m_mpsc->rxca_w(m_kb_clock);
}
m_hs_state = bool(state);
}
void v102_state::mem_map(address_map &map)
{
map.unmap_value_high();
map(0x0000, 0x3fff).rom().region("maincpu", 0);
map(0x8000, 0x8fff).ram();
map(0xa000, 0xafff).ram();
map(0xb800, 0xb9ff).rw("eeprom", FUNC(eeprom_parallel_28xx_device::read), FUNC(eeprom_parallel_28xx_device::write));
}
void v102_state::io_map(address_map &map)
{
map.global_mask(0xff);
map(0x00, 0x3f).rw("vpac", FUNC(crt9007_device::read), FUNC(crt9007_device::write));
map(0x40, 0x43).rw("mpsc", FUNC(upd7201_device::ba_cd_r), FUNC(upd7201_device::ba_cd_w));
map(0x60, 0x61).rw("usart", FUNC(i8251_device::read), FUNC(i8251_device::write));
map(0x80, 0x83).w("pit", FUNC(pit8253_device::write));
map(0xa0, 0xa3).rw("ppi", FUNC(i8255_device::read), FUNC(i8255_device::write));
}
void v102_state::machine_start()
{
m_hs_state = false;
m_kb_clock = false;
m_mpsc->ctsa_w(0);
m_mpsc->ctsb_w(0);
save_item(NAME(m_hs_state));
save_item(NAME(m_kb_clock));
}
static INPUT_PORTS_START(v102)
INPUT_PORTS_END
void v102_state::v102(machine_config &config)
{
Z80(config, m_maincpu, 18.575_MHz_XTAL / 5); // divider not verified
m_maincpu->set_addrmap(AS_PROGRAM, &v102_state::mem_map);
m_maincpu->set_addrmap(AS_IO, &v102_state::io_map);
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
screen.set_raw(18.575_MHz_XTAL, 970, 0, 800, 319, 0, 300);
//screen.set_raw(18.575_MHz_XTAL, 948, 0, 792, 319, 0, 300);
screen.set_screen_update(FUNC(v102_state::screen_update));
crt9007_device &vpac(CRT9007(config, "vpac", 18.575_MHz_XTAL / 10));
vpac.set_character_width(10); // 6 in 132-column mode
vpac.int_callback().set("mainirq", FUNC(input_merger_device::in_w<2>));
vpac.hs_callback().set(FUNC(v102_state::hs_w));
vpac.set_screen("screen");
EEPROM_2804(config, "eeprom");
UPD7201(config, m_mpsc, 18.575_MHz_XTAL / 5); // divider not verified
m_mpsc->out_int_callback().set("mainirq", FUNC(input_merger_device::in_w<0>));
m_mpsc->out_txda_callback().set("keyboard", FUNC(v102_keyboard_device::write_rxd));
m_mpsc->out_txdb_callback().set("aux", FUNC(rs232_port_device::write_txd));
m_mpsc->out_dtrb_callback().set("aux", FUNC(rs232_port_device::write_dtr));
m_mpsc->out_rtsb_callback().set("aux", FUNC(rs232_port_device::write_rts));
i8251_device &usart(I8251(config, "usart", 18.575_MHz_XTAL / 5)); // divider not verified
usart.rxrdy_handler().set("mainirq", FUNC(input_merger_device::in_w<1>));
usart.txd_handler().set("modem", FUNC(rs232_port_device::write_txd));
usart.dtr_handler().set("modem", FUNC(rs232_port_device::write_dtr));
usart.rts_handler().set("modem", FUNC(rs232_port_device::write_rts));
INPUT_MERGER_ANY_HIGH(config, "mainirq").output_handler().set_inputline(m_maincpu, INPUT_LINE_IRQ0);
pit8253_device &pit(PIT8253(config, "pit", 0));
pit.set_clk<0>(18.575_MHz_XTAL / 6);
pit.set_clk<1>(18.575_MHz_XTAL / 6);
pit.set_clk<2>(18.575_MHz_XTAL / 6);
pit.out_handler<0>().set("usart", FUNC(i8251_device::write_txc));
pit.out_handler<1>().set("usart", FUNC(i8251_device::write_rxc));
pit.out_handler<2>().set(m_mpsc, FUNC(upd7201_device::txcb_w));
pit.out_handler<2>().append(m_mpsc, FUNC(upd7201_device::rxcb_w));
I8255(config, "ppi");
v102_keyboard_device &keyboard(V102_KEYBOARD(config, "keyboard"));
keyboard.txd_callback().set(m_mpsc, FUNC(upd7201_device::rxa_w));
rs232_port_device &modem(RS232_PORT(config, "modem", default_rs232_devices, nullptr));
modem.rxd_handler().set("usart", FUNC(i8251_device::write_rxd));
modem.cts_handler().set("usart", FUNC(i8251_device::write_cts));
modem.dcd_handler().set("usart", FUNC(i8251_device::write_dsr));
rs232_port_device &aux(RS232_PORT(config, "aux", default_rs232_devices, nullptr));
aux.rxd_handler().set(m_mpsc, FUNC(upd7201_device::rxb_w));
aux.dcd_handler().set(m_mpsc, FUNC(upd7201_device::dcdb_w)); // DTR (printer busy)
}
/**************************************************************************************************************
Visual 102. (VT-102 clone plus graphics)
Chips: D780C-1 (Z80), CRT9021B-018, COM8251A, D8255AC-5, 2x CRT9006-135, CRT9007, M5L8253P-5, X2804AP-35, D7201C
Crystals: 18.575000
Keyboard: TMP8039P-6
***************************************************************************************************************/
ROM_START( v102 )
ROM_REGION(0x4000, "maincpu", 0)
ROM_LOAD( "245-001.u1", 0x0000, 0x4000, CRC(c36cc525) SHA1(a45e75ded10979c8e3ad262e2cf5818e08db762c) )
ROM_REGION(0x1000, "chargen", 0)
ROM_LOAD( "260-001.u50", 0x0000, 0x1000, CRC(732f5b99) SHA1(d105bf9f3ed41109d7181bcf0223bb280afe3f0a) )
ROM_END
} // anonymous namespace
COMP( 1984, v102, 0, 0, v102, v102, v102_state, empty_init, "Visual Technology", "Visual 102", MACHINE_IS_SKELETON )