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https://github.com/holub/mame
synced 2025-04-22 16:31:49 +03:00
in207376: Hook up brightness control and switch to X2212
This commit is contained in:
Dirk Best
parent
912b93b030
commit
29b0447e88
@ -8,15 +8,16 @@
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Hardware:
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- M6809
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- 8253 PIT
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- Z80SCC 8530
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- 6850 ACIA (up to 4)
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- X2212P NVRAM
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- 2x 6850 ACIA (up to 4)
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- 2x X2212P NOVRAM
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TODO:
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- Dump keyboard controller and emulate it (currently HLE'd)
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- Problably needs improvements to at least the Z80SCC to
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properly support synchrous modes
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- Figure out unknown reads/writes to the memory
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- Figure out the unknown bits at 0x8400
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- Verify NMI hookup
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- Verify clock speeds
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@ -32,7 +33,7 @@
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#include "machine/pit8253.h"
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#include "machine/clock.h"
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#include "machine/input_merger.h"
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#include "machine/nvram.h"
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#include "machine/x2212.h"
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#include "machine/z80scc.h"
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#include "video/mc6845.h"
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#include "sound/beep.h"
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@ -54,6 +55,7 @@ public:
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informer_207_376_state(const machine_config &mconfig, device_type type, const char *tag) :
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driver_device(mconfig, type, tag),
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m_maincpu(*this, "maincpu"),
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m_novram(*this, "novram%u", 0U),
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m_crtc(*this, "crtc"),
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m_screen(*this, "screen"),
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m_palette(*this, "palette"),
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@ -62,8 +64,7 @@ public:
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m_acia(*this, "acia%u", 0U),
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m_beep(*this, "beep"),
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m_ram(*this, "ram"),
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m_chargen(*this, "chargen"),
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m_nmi_enabled(false)
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m_chargen(*this, "chargen")
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{ }
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void informer_207_376(machine_config &config);
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@ -74,6 +75,7 @@ protected:
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private:
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required_device<cpu_device> m_maincpu;
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required_device_array<x2212_device, 2> m_novram;
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required_device<mc6845_device> m_crtc;
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required_device<screen_device> m_screen;
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required_device<palette_device> m_palette;
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@ -86,15 +88,14 @@ private:
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void mem_map(address_map &map);
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MC6845_UPDATE_ROW(crtc_update_row);
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uint32_t screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
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void vsync_w(int state);
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void nmi_control_w(uint8_t data);
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void unk_8400_w(uint8_t data);
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void crt_brightness_w(uint8_t data);
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uint8_t novram_r(address_space &space, offs_t offset);
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void novram_w(offs_t offset, uint8_t data);
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uint8_t novram_recall_r();
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bool m_display_enabled;
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bool m_nmi_enabled;
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MC6845_UPDATE_ROW(crtc_update_row);
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void vsync_w(int state);
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};
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@ -110,10 +111,11 @@ void informer_207_376_state::mem_map(address_map &map)
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map(0x8400, 0x8400).lr8(NAME([] () { return 0xff; })).w(FUNC(informer_207_376_state::unk_8400_w)); // ?
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map(0x8802, 0x8803).rw(m_acia[0], FUNC(acia6850_device::read), FUNC(acia6850_device::write));
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map(0x8804, 0x8805).rw(m_acia[1], FUNC(acia6850_device::read), FUNC(acia6850_device::write));
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map(0x8c00, 0x8c00).w(FUNC(informer_207_376_state::nmi_control_w));
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map(0x8c00, 0x8c00).w(FUNC(informer_207_376_state::crt_brightness_w));
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map(0x9000, 0x9003).rw(m_pit, FUNC(pit8253_device::read), FUNC(pit8253_device::write));
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map(0x9400, 0x9403).rw(m_scc, FUNC(scc85c30_device::ab_dc_r), FUNC(scc85c30_device::ab_dc_w));
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map(0x9c00, 0x9cff).ram().share("nvram");
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map(0x9800, 0x9800).r(FUNC(informer_207_376_state::novram_recall_r));
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map(0x9c00, 0x9cff).rw(FUNC(informer_207_376_state::novram_r), FUNC(informer_207_376_state::novram_w));
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map(0xa000, 0xffff).rom().region("maincpu", 0);
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}
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@ -130,9 +132,16 @@ INPUT_PORTS_END
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// VIDEO EMULATION
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//**************************************************************************
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void informer_207_376_state::crt_brightness_w(uint8_t data)
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{
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// unknown algorithm for the brightness
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// default value is 4, range is 0 (off) to 15 (brightest)
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m_screen->set_brightness(256 - (256 / ((data & 0x0f) + 1)));
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}
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void informer_207_376_state::vsync_w(int state)
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{
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if (m_nmi_enabled && state == 1)
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if (state)
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{
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m_maincpu->set_input_line(INPUT_LINE_NMI, ASSERT_LINE);
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m_maincpu->set_input_line(INPUT_LINE_NMI, CLEAR_LINE);
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@ -167,16 +176,6 @@ MC6845_UPDATE_ROW( informer_207_376_state::crtc_update_row )
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}
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}
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uint32_t informer_207_376_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
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{
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if (m_display_enabled)
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m_crtc->screen_update(screen, bitmap, cliprect);
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else
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bitmap.fill(rgb_t::black(), cliprect);
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return 0;
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}
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static const gfx_layout char_layout =
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{
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8,11,
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@ -197,39 +196,45 @@ GFXDECODE_END
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// MACHINE EMULATION
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//**************************************************************************
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void informer_207_376_state::nmi_control_w(uint8_t data)
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{
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// 76543--- unused?
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// -----21- nmi enable?
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// -------0 unused?
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m_nmi_enabled = bool(data & 0x06);
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}
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void informer_207_376_state::unk_8400_w(uint8_t data)
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{
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// 7------- beeper
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// -6------ unknown
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// --5----- 1=internal modem, 0=host rs232
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// ---43--- unknown
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// -----2-- display enabled?
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// -----2-- unknown
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// ------10 unknown
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m_beep->set_state(BIT(data, 7));
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m_display_enabled = bool(BIT(data, 2));
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}
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uint8_t informer_207_376_state::novram_r(address_space &space, offs_t offset)
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{
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return (m_novram[0]->read(space, offset) << 4) | (m_novram[1]->read(space, offset) & 0x0f);
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}
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void informer_207_376_state::novram_w(offs_t offset, uint8_t data)
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{
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m_novram[0]->write(offset, data >> 4);
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m_novram[1]->write(offset, data & 0x0f);
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}
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uint8_t informer_207_376_state::novram_recall_r()
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{
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m_novram[0]->recall(1);
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m_novram[1]->recall(1);
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m_novram[0]->recall(0);
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m_novram[1]->recall(0);
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return 0xff;
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}
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void informer_207_376_state::machine_start()
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{
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// register for save states
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save_item(NAME(m_display_enabled));
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save_item(NAME(m_nmi_enabled));
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}
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void informer_207_376_state::machine_reset()
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{
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m_display_enabled = false;
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m_nmi_enabled = false;
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}
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@ -250,7 +255,8 @@ void informer_207_376_state::informer_207_376(machine_config &config)
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input_merger_device &cpu_irq(INPUT_MERGER_ANY_HIGH(config, "cpu_irq"));
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cpu_irq.output_handler().set_inputline(m_maincpu, M6809_IRQ_LINE);
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NVRAM(config, "nvram", nvram_device::DEFAULT_ALL_0); // 2x X2212P
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X2212(config, "novram0");
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X2212(config, "novram1");
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PIT8253(config, m_pit);
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m_pit->set_clk<0>(2.457600_MHz_XTAL);
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@ -272,6 +278,8 @@ void informer_207_376_state::informer_207_376(machine_config &config)
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ACIA6850(config, m_acia[0]);
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m_acia[0]->txd_handler().set("kbd", FUNC(informer_207_376_kbd_hle_device::rx_w));
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m_acia[0]->irq_handler().set("cpu_irq", FUNC(input_merger_device::in_w<1>));
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m_acia[0]->rts_handler().set(m_novram[0], FUNC(x2212_device::store)).invert();
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m_acia[0]->rts_handler().append(m_novram[1], FUNC(x2212_device::store)).invert();
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ACIA6850(config, m_acia[1]);
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m_acia[1]->txd_handler().set("printer", FUNC(rs232_port_device::write_txd));
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@ -295,7 +303,7 @@ void informer_207_376_state::informer_207_376(machine_config &config)
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SCREEN(config, m_screen, SCREEN_TYPE_RASTER);
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m_screen->set_color(rgb_t::green());
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m_screen->set_raw(36_MHz_XTAL / 2.5, 800, 0, 640, 300, 0, 286);
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m_screen->set_screen_update(FUNC(informer_207_376_state::screen_update));
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m_screen->set_screen_update(m_crtc, FUNC(mc6845_device::screen_update));
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PALETTE(config, m_palette, palette_device::MONOCHROME);
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