// license: BSD-3-Clause
// copyright-holders: Dirk Best
/***************************************************************************
Informer 207/376
IBM 3270 compatible terminal
Hardware:
- M6809
- Z80SCC 8530
- 6850 ACIA (up to 4)
- X2212P NVRAM
TODO:
- Redump bad ROMs
- Dump keyboard controller and emulate it (currently HLE'd)
- Problably needs improvements to at least the Z80SCC to
properly support synchrous modes
- Figure out unknown reads/writes to the memory
- Verify NMI hookup
- Verify clock speeds
Notes:
- Thanks to charcole and his zmachine3270 project at
https://github.com/charcole/zmachine3270
***************************************************************************/
#include "emu.h"
#include "cpu/m6809/m6809.h"
#include "machine/6850acia.h"
#include "machine/pit8253.h"
#include "machine/clock.h"
#include "machine/input_merger.h"
#include "machine/nvram.h"
#include "machine/z80scc.h"
#include "video/mc6845.h"
#include "sound/beep.h"
#include "bus/rs232/rs232.h"
#include "bus/rs232/printer.h"
#include "machine/informer_207_376_kbd.h"
#include "emupal.h"
#include "screen.h"
#include "speaker.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
class informer_207_376_state : public driver_device
{
public:
informer_207_376_state(const machine_config &mconfig, device_type type, const char *tag) :
driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu"),
m_crtc(*this, "crtc"),
m_screen(*this, "screen"),
m_palette(*this, "palette"),
m_pit(*this, "pit"),
m_scc(*this, "scc"),
m_acia(*this, "acia%u", 0U),
m_beep(*this, "beep"),
m_ram(*this, "ram"),
m_chargen(*this, "chargen"),
m_nmi_enabled(false)
{ }
void informer_207_376(machine_config &config);
protected:
void machine_start() override;
void machine_reset() override;
private:
required_device<cpu_device> m_maincpu;
required_device<mc6845_device> m_crtc;
required_device<screen_device> m_screen;
required_device<palette_device> m_palette;
required_device<pit8253_device> m_pit;
required_device<scc85c30_device> m_scc;
required_device_array<acia6850_device, 2> m_acia;
required_device<beep_device> m_beep;
required_shared_ptr<uint8_t> m_ram;
required_region_ptr<uint8_t> m_chargen;
void mem_map(address_map &map);
MC6845_UPDATE_ROW(crtc_update_row);
void vsync_w(int state);
void nmi_control_w(uint8_t data);
void unk_8400_w(uint8_t data);
bool m_nmi_enabled;
};
//**************************************************************************
// ADDRESS MAPS
//**************************************************************************
void informer_207_376_state::mem_map(address_map &map)
{
map(0x0000, 0x7fff).ram().share("ram");
map(0x8000, 0x8000).rw(m_crtc, FUNC(mc6845_device::status_r), FUNC(mc6845_device::address_w));
map(0x8001, 0x8001).rw(m_crtc, FUNC(mc6845_device::register_r), FUNC(mc6845_device::register_w));
map(0x8400, 0x8400).lr8(NAME([] () { return 0xff; })).w(FUNC(informer_207_376_state::unk_8400_w)); // ?
map(0x8802, 0x8803).rw(m_acia[0], FUNC(acia6850_device::read), FUNC(acia6850_device::write));
map(0x8804, 0x8805).rw(m_acia[1], FUNC(acia6850_device::read), FUNC(acia6850_device::write));
map(0x8c00, 0x8c00).w(FUNC(informer_207_376_state::nmi_control_w));
map(0x9000, 0x9003).rw(m_pit, FUNC(pit8253_device::read), FUNC(pit8253_device::write));
map(0x9400, 0x9403).rw(m_scc, FUNC(scc85c30_device::ab_dc_r), FUNC(scc85c30_device::ab_dc_w));
map(0x9c00, 0x9cff).ram().share("nvram");
map(0xa000, 0xffff).rom().region("maincpu", 0);
}
//**************************************************************************
// INPUT PORT DEFINITIONS
//**************************************************************************
static INPUT_PORTS_START( informer_207_376 )
INPUT_PORTS_END
//**************************************************************************
// VIDEO EMULATION
//**************************************************************************
void informer_207_376_state::vsync_w(int state)
{
if (m_nmi_enabled && state == 1)
{
m_maincpu->set_input_line(INPUT_LINE_NMI, ASSERT_LINE);
m_maincpu->set_input_line(INPUT_LINE_NMI, CLEAR_LINE);
}
}
MC6845_UPDATE_ROW( informer_207_376_state::crtc_update_row )
{
const pen_t *pen = m_palette->pens();
for (int x = 0; x < x_count; x++)
{
uint8_t code = m_ram[ma + x];
uint8_t data = m_chargen[(code << 4) + ra];
if (x == cursor_x)
data = 0xff;
// draw 8 pixels of the character
bitmap.pix32(y, x * 8 + 7) = pen[BIT(data, 0)];
bitmap.pix32(y, x * 8 + 6) = pen[BIT(data, 1)];
bitmap.pix32(y, x * 8 + 5) = pen[BIT(data, 2)];
bitmap.pix32(y, x * 8 + 4) = pen[BIT(data, 3)];
bitmap.pix32(y, x * 8 + 3) = pen[BIT(data, 4)];
bitmap.pix32(y, x * 8 + 2) = pen[BIT(data, 5)];
bitmap.pix32(y, x * 8 + 1) = pen[BIT(data, 6)];
bitmap.pix32(y, x * 8 + 0) = pen[BIT(data, 7)];
}
}
static const gfx_layout char_layout =
{
8,11,
RGN_FRAC(1,1),
1,
{ 0 },
{ 0, 1, 2, 3, 4, 5, 6, 7 },
{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8, 8*8, 9*8, 10*8 },
8*16
};
static GFXDECODE_START(chars)
GFXDECODE_ENTRY("chargen", 0, char_layout, 0, 1)
GFXDECODE_END
//**************************************************************************
// MACHINE EMULATION
//**************************************************************************
void informer_207_376_state::nmi_control_w(uint8_t data)
{
// 76543--- unused?
// -----21- nmi enable?
// -------0 unused?
m_nmi_enabled = bool(data & 0x06);
}
void informer_207_376_state::unk_8400_w(uint8_t data)
{
// 7------- beeper
// -6------ unknown
// --5----- 1=internal modem, 0=host rs232
// ---43210 unknown
m_beep->set_state(BIT(data, 7));
}
void informer_207_376_state::machine_start()
{
// register for save states
save_item(NAME(m_nmi_enabled));
}
void informer_207_376_state::machine_reset()
{
m_nmi_enabled = false;
}
//**************************************************************************
// MACHINE DEFINTIONS
//**************************************************************************
void printer_devices(device_slot_interface &device)
{
device.option_add("printer", SERIAL_PRINTER);
}
void informer_207_376_state::informer_207_376(machine_config &config)
{
MC6809(config, m_maincpu, 36_MHz_XTAL / 4); // unknown clock
m_maincpu->set_addrmap(AS_PROGRAM, &informer_207_376_state::mem_map);
input_merger_device &cpu_irq(INPUT_MERGER_ANY_HIGH(config, "cpu_irq"));
cpu_irq.output_handler().set_inputline(m_maincpu, M6809_IRQ_LINE);
NVRAM(config, "nvram", nvram_device::DEFAULT_ALL_0); // 2x X2212P
PIT8253(config, m_pit);
m_pit->set_clk<0>(4915200 / 2);
m_pit->out_handler<0>().set(m_acia[1], FUNC(acia6850_device::write_txc));
m_pit->out_handler<0>().append(m_acia[1], FUNC(acia6850_device::write_rxc));
m_pit->set_clk<1>(4915200 / 2);
m_pit->out_handler<1>().set(m_acia[0], FUNC(acia6850_device::write_txc));
m_pit->out_handler<1>().append(m_acia[0], FUNC(acia6850_device::write_rxc));
SCC85C30(config, m_scc, 4915200);
m_scc->out_txda_callback().set("com1", FUNC(rs232_port_device::write_txd));
m_scc->out_dtra_callback().set("com1", FUNC(rs232_port_device::write_dtr));
m_scc->out_rtsa_callback().set("com1", FUNC(rs232_port_device::write_rts));
m_scc->out_txdb_callback().set("com2", FUNC(rs232_port_device::write_txd));
m_scc->out_dtrb_callback().set("com2", FUNC(rs232_port_device::write_dtr));
m_scc->out_rtsb_callback().set("com2", FUNC(rs232_port_device::write_rts));
m_scc->out_int_callback().set("cpu_irq", FUNC(input_merger_device::in_w<0>));
ACIA6850(config, m_acia[0], 0); // unknown clock
m_acia[0]->txd_handler().set("kbd", FUNC(informer_207_376_kbd_hle_device::rx_w));
m_acia[0]->irq_handler().set("cpu_irq", FUNC(input_merger_device::in_w<1>));
ACIA6850(config, m_acia[1], 0); // unknown clock
m_acia[1]->txd_handler().set("printer", FUNC(rs232_port_device::write_txd));
rs232_port_device &com1(RS232_PORT(config, "com1", default_rs232_devices, nullptr));
com1.rxd_handler().set(m_scc, FUNC(scc85c30_device::rxa_w));
com1.dcd_handler().set(m_scc, FUNC(scc85c30_device::dcda_w));
com1.cts_handler().set(m_scc, FUNC(scc85c30_device::ctsa_w));
rs232_port_device &com2(RS232_PORT(config, "com2", default_rs232_devices, nullptr));
com2.rxd_handler().set(m_scc, FUNC(scc85c30_device::rxb_w));
com2.dcd_handler().set(m_scc, FUNC(scc85c30_device::dcdb_w));
com2.cts_handler().set(m_scc, FUNC(scc85c30_device::ctsb_w));
RS232_PORT(config, "printer", printer_devices, nullptr);
informer_207_376_kbd_hle_device &kbd(INFORMER_207_376_KBD_HLE(config, "kbd"));
kbd.tx_handler().set(m_acia[0], FUNC(acia6850_device::write_rxd));
// video
SCREEN(config, m_screen, SCREEN_TYPE_RASTER);
m_screen->set_color(rgb_t::green());
m_screen->set_raw(14400000, 800, 0, 640, 300, 0, 286); // unknown clock
m_screen->set_screen_update("crtc", FUNC(mc6845_device::screen_update));
PALETTE(config, m_palette, palette_device::MONOCHROME);
GFXDECODE(config, "gfxdecode", m_palette, chars);
MC6845(config, m_crtc, 1800000); // unknown clock
m_crtc->set_screen("screen");
m_crtc->set_show_border_area(false);
m_crtc->set_char_width(8);
m_crtc->set_update_row_callback(FUNC(informer_207_376_state::crtc_update_row));
m_crtc->out_vsync_callback().set(FUNC(informer_207_376_state::vsync_w));
// sound
SPEAKER(config, "mono").front_center();
BEEP(config, "beep", 500).add_route(ALL_OUTPUTS, "mono", 0.50); // frequency unknown
}
//**************************************************************************
// ROM DEFINITIONS
//**************************************************************************
ROM_START( in207376 )
ROM_REGION(0x6000, "maincpu", 0)
// M2764A F1
// 79590-023 376SNA V1.00 201C 7224 (our checksum: 7264)
ROM_LOAD("79590-023.z37", 0x0000, 0x2000, BAD_DUMP CRC(ed4ff488) SHA1(fdd95c520d0288ea483b5d2e8e6c8eecb04063c1))
// M27128AF1
// 79589-023 376 SNAV1.00 201C E86F (checksum matches)
ROM_LOAD("79589-023.z36", 0x2000, 0x4000, CRC(cdfaf629) SHA1(1f21ef6848020726ef3d7ab05166ac8590d58476))
ROM_REGION(0x1000, "chargen", 0)
// TMS2732AGL-25
// 79573-001 V1.00 376/8 CHAR. GEN.
ROM_LOAD("79573-001.z6", 0x0000, 0x1000, CRC(f704b827) SHA1(bcc56eeb8681c2bebe3a9f4b6b78c0373c06d875))
ROM_END
//**************************************************************************
// SYSTEM DRIVERS
//**************************************************************************
// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
COMP( 1986, in207376, 0, 0, informer_207_376, informer_207_376, informer_207_376_state, empty_init, "Informer", "Informer 207/376", MACHINE_NOT_WORKING | MACHINE_SUPPORTS_SAVE )