// license:BSD-3-Clause // copyright-holders:Wilbert Pol, Miodrag Milanovic /*************************************************************************** Monochrome Display Adapter (MDA) section ***************************************************************************/ #include "emu.h" #include "mda.h" #include "screen.h" #define LOG_READ (1U << 1) #define LOG_SETUP (1U << 2) #define LOG_ROW (1U << 3) #define LOG_MODE (1U << 4) #define LOG_CHRG (1U << 5) #define LOG_STAT (1U << 6) //#define VERBOSE (LOG_MODE|LOG_STAT) //#define LOG_OUTPUT_STREAM std::cout #include "logmacro.h" #define LOGR(...) LOGMASKED(LOG_READ, __VA_ARGS__) #define LOGSETUP(...) LOGMASKED(LOG_SETUP, __VA_ARGS__) #define LOGROW(...) LOGMASKED(LOG_ROW, __VA_ARGS__) #define LOGMODE(...) LOGMASKED(LOG_MODE, __VA_ARGS__) #define LOGCHRG(...) LOGMASKED(LOG_CHRG, __VA_ARGS__) #define LOGSTAT(...) LOGMASKED(LOG_STAT, __VA_ARGS__) #ifdef _MSC_VER #define FUNCNAME __func__ #else #define FUNCNAME __PRETTY_FUNCTION__ #endif #define MDA_SCREEN_NAME "mda_screen" #define MC6845_NAME "mc6845" /* Hercules video card */ #define HERCULES_SCREEN_NAME "hercules_screen" #define MDA_CLOCK XTAL(16'257'000) static const unsigned char mda_palette[4][3] = { { 0x00,0x00,0x00 }, { 0x00,0x55,0x00 }, { 0x00,0xaa,0x00 }, { 0x00,0xff,0x00 } }; enum { MDA_TEXT_INTEN = 0, MDA_TEXT_BLINK, HERCULES_GFX_BLINK, MDA_LOWRES_TEXT_INTEN, MDA_LOWRES_TEXT_BLINK }; /* F4 Character Displayer */ static const gfx_layout pc_16_charlayout = { 8, 16, /* 8 x 16 characters */ 256, /* 256 characters */ 1, /* 1 bits per pixel */ { 0 }, /* no bitplanes */ /* x offsets */ { 0, 1, 2, 3, 4, 5, 6, 7 }, /* y offsets */ { 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8, 2048*8, 2049*8, 2050*8, 2051*8, 2052*8, 2053*8, 2054*8, 2055*8 }, 8*8 /* every char takes 2 x 8 bytes */ }; static const gfx_layout pc_8_charlayout = { 8, 8, /* 8 x 8 characters */ 512, /* 512 characters */ 1, /* 1 bits per pixel */ { 0 }, /* no bitplanes */ /* x offsets */ { 0, 1, 2, 3, 4, 5, 6, 7 }, /* y offsets */ { 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8 }, 8*8 /* every char takes 8 bytes */ }; static GFXDECODE_START( gfx_pcmda ) GFXDECODE_ENTRY( "gfx1", 0x0000, pc_16_charlayout, 1, 1 ) GFXDECODE_ENTRY( "gfx1", 0x1000, pc_8_charlayout, 1, 1 ) GFXDECODE_END WRITE_LINE_MEMBER( isa8_mda_device::pc_cpu_line ) { m_isa->irq7_w(state); } ROM_START( mda ) /* IBM 1501981(CGA) and 1501985(MDA) Character rom */ ROM_REGION(0x08100,"gfx1", 0) ROM_LOAD("5788005.u33", 0x00000, 0x02000, CRC(0bf56d70) SHA1(c2a8b10808bf51a3c123ba3eb1e9dd608231916f)) /* "AMI 8412PI // 5788005 // (C) IBM CORP. 1981 // KOREA" */ ROM_END //************************************************************************** // GLOBAL VARIABLES //************************************************************************** DEFINE_DEVICE_TYPE(ISA8_MDA, isa8_mda_device, "isa_ibm_mda", "IBM Monochrome Display and Printer Adapter") //------------------------------------------------- // device_add_mconfig - add device configuration //------------------------------------------------- void isa8_mda_device::device_add_mconfig(machine_config &config) { screen_device &screen(SCREEN(config, MDA_SCREEN_NAME, SCREEN_TYPE_RASTER)); screen.set_raw(MDA_CLOCK, 882, 0, 720, 370, 0, 350); screen.set_screen_update(MC6845_NAME, FUNC(mc6845_device::screen_update)); PALETTE(config, m_palette).set_entries(4); MC6845(config, m_crtc, MDA_CLOCK/9); m_crtc->set_screen(MDA_SCREEN_NAME); m_crtc->set_show_border_area(false); m_crtc->set_char_width(9); m_crtc->set_update_row_callback(FUNC(isa8_mda_device::crtc_update_row)); m_crtc->out_hsync_callback().set(FUNC(isa8_mda_device::hsync_changed)); m_crtc->out_vsync_callback().set(FUNC(isa8_mda_device::vsync_changed)); GFXDECODE(config, "gfxdecode", m_palette, gfx_pcmda); PC_LPT(config, m_lpt); m_lpt->irq_handler().set(FUNC(isa8_mda_device::pc_cpu_line)); } //------------------------------------------------- // rom_region - device-specific ROM region //------------------------------------------------- const tiny_rom_entry *isa8_mda_device::device_rom_region() const { return ROM_NAME( mda ); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // isa8_mda_device - constructor //------------------------------------------------- isa8_mda_device::isa8_mda_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : isa8_mda_device(mconfig, ISA8_MDA, tag, owner, clock) { } isa8_mda_device::isa8_mda_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, type, tag, owner, clock), device_isa8_card_interface(mconfig, *this), m_crtc(*this, MC6845_NAME), m_lpt(*this, "lpt"), m_framecnt(0), m_mode_control(0), m_update_row_type(-1), m_chr_gen(nullptr), m_vsync(0), m_hsync(0), m_pixel(0), m_palette(*this, "palette") { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void isa8_mda_device::device_start() { if (m_palette != nullptr && !m_palette->started()) throw device_missing_dependencies(); set_isa_device(); m_videoram.resize(0x1000); m_isa->install_device(0x3b0, 0x3bf, read8sm_delegate(*this, FUNC(isa8_mda_device::io_read)), write8sm_delegate(*this, FUNC(isa8_mda_device::io_write))); m_isa->install_bank(0xb0000, 0xb0fff, &m_videoram[0]); m_isa->install_bank(0xb1000, 0xb1fff, &m_videoram[0]); m_isa->install_bank(0xb2000, 0xb2fff, &m_videoram[0]); m_isa->install_bank(0xb3000, 0xb3fff, &m_videoram[0]); m_isa->install_bank(0xb4000, 0xb4fff, &m_videoram[0]); m_isa->install_bank(0xb5000, 0xb5fff, &m_videoram[0]); m_isa->install_bank(0xb6000, 0xb6fff, &m_videoram[0]); m_isa->install_bank(0xb7000, 0xb7fff, &m_videoram[0]); /* Initialise the mda palette */ for (int i = 0; i < 4; i++) m_palette->set_pen_color(i, rgb_t(mda_palette[i][0], mda_palette[i][1], mda_palette[i][2])); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void isa8_mda_device::device_reset() { m_framecnt = 0; m_mode_control = 0; m_vsync = 0; m_hsync = 0; m_pixel = 0; m_chr_gen = memregion(subtag("gfx1").c_str())->base(); } /*************************************************************************** Monochrome Display Adapter (MDA) section ***************************************************************************/ /*************************************************************************** Draw text mode with 80x25 characters (default) and intense background. The character cell size is 9x15. Column 9 is column 8 repeated for character codes 176 to 223. ***************************************************************************/ MC6845_UPDATE_ROW( isa8_mda_device::mda_text_inten_update_row ) { rgb_t const *const palette = m_palette->palette()->entry_list_raw(); uint32_t *p = &bitmap.pix(y); uint16_t const chr_base = (ra & 0x08) ? 0x800 | (ra & 0x07) : ra; if (y == 0) LOGROW("%11.6f: %-24s\n", machine().time().as_double(), FUNCNAME); for (int i = 0; i < x_count; i++) { uint16_t const offset = ((ma + i) << 1) & 0x0fff; uint8_t const chr = m_videoram[offset]; uint8_t const attr = m_videoram[offset + 1]; uint8_t data = m_chr_gen[chr_base + chr * 8]; uint8_t fg = (attr & 0x08) ? 3 : 2; uint8_t bg = 0; if ((attr & ~0x88) == 0) { data = 0x00; } switch (attr) { case 0x70: bg = 2; fg = 0; break; case 0x78: bg = 2; fg = 1; break; case 0xf0: bg = 3; fg = 0; break; case 0xf8: bg = 3; fg = 1; break; } if ((i == cursor_x && (m_framecnt & 0x08)) || (attr & 0x07) == 0x01) { data = 0xff; } *p++ = palette[(data & 0x80) ? fg : bg]; *p++ = palette[(data & 0x40) ? fg : bg]; *p++ = palette[(data & 0x20) ? fg : bg]; *p++ = palette[(data & 0x10) ? fg : bg]; *p++ = palette[(data & 0x08) ? fg : bg]; *p++ = palette[(data & 0x04) ? fg : bg]; *p++ = palette[(data & 0x02) ? fg : bg]; *p++ = palette[(data & 0x01) ? fg : bg]; if ((chr & 0xe0) == 0xc0) { *p++ = palette[(data & 0x01) ? fg : bg]; } else { *p++ = palette[bg]; } } } /*************************************************************************** Draw text mode with 80x25 characters (default) and blinking characters. The character cell size is 9x15. Column 9 is column 8 repeated for character codes 176 to 223. ***************************************************************************/ MC6845_UPDATE_ROW( isa8_mda_device::mda_text_blink_update_row ) { rgb_t const *const palette = m_palette->palette()->entry_list_raw(); uint32_t *p = &bitmap.pix(y); uint16_t const chr_base = (ra & 0x08) ? 0x800 | (ra & 0x07) : ra; if (y == 0) LOGROW("%11.6f: %-24s\n", machine().time().as_double(), FUNCNAME); for (int i = 0; i < x_count; i++) { uint16_t const offset = ((ma + i) << 1) & 0x0fff; uint8_t const chr = m_videoram[offset]; uint8_t const attr = m_videoram[offset + 1]; uint8_t data = m_chr_gen[chr_base + chr * 8]; uint8_t fg = (attr & 0x08) ? 3 : 2; uint8_t bg = 0; if ((attr & ~0x88) == 0) { data = 0x00; } switch (attr) { case 0x70: case 0xf0: bg = 2; fg = 0; break; case 0x78: case 0xf8: bg = 2; fg = 1; break; } if ((attr & 0x07) == 0x01) { data = 0xff; } if (i == cursor_x) { if (m_framecnt & 0x08) { data = 0xff; } } else { if ((attr & 0x80) && (m_framecnt & 0x10)) { data = 0x00; } } *p++ = palette[(data & 0x80) ? fg : bg]; *p++ = palette[(data & 0x40) ? fg : bg]; *p++ = palette[(data & 0x20) ? fg : bg]; *p++ = palette[(data & 0x10) ? fg : bg]; *p++ = palette[(data & 0x08) ? fg : bg]; *p++ = palette[(data & 0x04) ? fg : bg]; *p++ = palette[(data & 0x02) ? fg : bg]; *p++ = palette[(data & 0x01) ? fg : bg]; if ((chr & 0xe0) == 0xc0) { *p++ = palette[(data & 0x01) ? fg : bg]; } else { *p++ = palette[bg]; } } } MC6845_UPDATE_ROW( isa8_mda_device::crtc_update_row ) { if (m_update_row_type == -1) return; switch (m_update_row_type) { case MDA_TEXT_INTEN: mda_text_inten_update_row(bitmap, cliprect, ma, ra, y, x_count, cursor_x, de, hbp, vbp); break; case MDA_TEXT_BLINK: mda_text_blink_update_row(bitmap, cliprect, ma, ra, y, x_count, cursor_x, de, hbp, vbp); break; } } MC6845_UPDATE_ROW( isa8_hercules_device::crtc_update_row ) { if (m_update_row_type == -1) return; switch (m_update_row_type) { case HERCULES_GFX_BLINK: hercules_gfx_update_row(bitmap, cliprect, ma, ra, y, x_count, cursor_x, de, hbp, vbp); break; default: isa8_mda_device::crtc_update_row(bitmap, cliprect, ma, ra, y, x_count, cursor_x, de, hbp, vbp); break; } } WRITE_LINE_MEMBER( isa8_mda_device::hsync_changed ) { m_hsync = state ? 1 : 0; } WRITE_LINE_MEMBER( isa8_mda_device::vsync_changed ) { m_vsync = state ? 0x80 : 0; if ( state ) { m_framecnt++; } } /* * rW MDA mode control register (see #P138) */ void isa8_mda_device::mode_control_w(uint8_t data) { m_mode_control = data; switch( m_mode_control & 0x2a ) { case 0x08: m_update_row_type = MDA_TEXT_INTEN; break; case 0x28: m_update_row_type = MDA_TEXT_BLINK; break; default: m_update_row_type = -1; } } /* R- CRT status register (see #P139) * (EGA/VGA) input status 1 register * 7 HGC vertical sync in progress * 6-4 adapter 000 hercules * 001 hercules+ * 101 hercules InColor * else unknown * 3 pixel stream (0 black, 1 white) * 2-1 reserved * 0 horizontal drive enable */ uint8_t isa8_mda_device::status_r() { // Faking pixel stream here if (!machine().side_effects_disabled()) m_pixel++; return 0xF0 | (m_pixel & 0x08) | m_hsync; } /************************************************************************* * * MDA * monochrome display adapter * *************************************************************************/ void isa8_mda_device::io_write(offs_t offset, uint8_t data) { switch( offset ) { case 0x00: case 0x02: case 0x04: case 0x06: m_crtc->address_w(data); break; case 0x01: case 0x03: case 0x05: case 0x07: m_crtc->register_w(data); break; case 0x08: mode_control_w(data); break; case 0x0c: case 0x0d: case 0x0e: m_lpt->write(offset - 0x0c, data); break; } } uint8_t isa8_mda_device::io_read(offs_t offset) { int data = 0xff; switch( offset ) { case 0x00: case 0x02: case 0x04: case 0x06: /* return last written mc6845 address value here? */ break; case 0x01: case 0x03: case 0x05: case 0x07: data = m_crtc->register_r(); break; case 0x0a: data = status_r(); break; /* LPT ports */ case 0x0c: case 0x0d: case 0x0e: data = m_lpt->read(offset - 0x0c); break; } return data; } /*************************************************************************** Hercules Display Adapter section (re-uses parts from the MDA section) ***************************************************************************/ /* When the Hercules changes to graphics mode, the number of pixels per access and clock divider should be changed. The correct mc6845 implementation does not allow this. The divder/pixels per 6845 clock is 9 for text mode and 16 for graphics mode. */ static GFXDECODE_START( gfx_pcherc ) GFXDECODE_ENTRY( "gfx1", 0x0000, pc_16_charlayout, 1, 1 ) GFXDECODE_END ROM_START( hercules ) ROM_REGION(0x1000, "gfx1", 0) ROM_SYSTEM_BIOS(0, "cp437", "Code page 437") ROMX_LOAD("um2301.bin", 0x0000, 0x1000, CRC(0827bdac) SHA1(15f1aceeee8b31f0d860ff420643e3c7f29b5ffc), ROM_BIOS(0)) ROM_SYSTEM_BIOS(1, "mzv", "Mazovia (Polish)") // dumped from a Taiwanese-made card using the SiS 86C22 chip ROMX_LOAD("hgc_mzv_2301.bin", 0x0000, 0x1000, CRC(9431b9e0) SHA1(3279dfeed4a0f5daa7b57d455c96eafdcbb6bf41), ROM_BIOS(1)) ROM_END //************************************************************************** // GLOBAL VARIABLES //************************************************************************** DEFINE_DEVICE_TYPE(ISA8_HERCULES, isa8_hercules_device, "isa_hercules", "Hercules Graphics Card") //------------------------------------------------- // device_add_mconfig - add device configuration //------------------------------------------------- void isa8_hercules_device::device_add_mconfig(machine_config &config) { screen_device &screen(SCREEN(config, HERCULES_SCREEN_NAME, SCREEN_TYPE_RASTER)); screen.set_raw(MDA_CLOCK, 882, 0, 720, 370, 0, 350); screen.set_screen_update(MC6845_NAME, FUNC(mc6845_device::screen_update)); PALETTE(config, m_palette).set_entries(4); MC6845(config, m_crtc, MDA_CLOCK/9); m_crtc->set_screen(HERCULES_SCREEN_NAME); m_crtc->set_show_border_area(false); m_crtc->set_char_width(9); m_crtc->set_update_row_callback(FUNC(isa8_hercules_device::crtc_update_row)); m_crtc->out_hsync_callback().set(FUNC(isa8_mda_device::hsync_changed)); m_crtc->out_vsync_callback().set(FUNC(isa8_mda_device::vsync_changed)); GFXDECODE(config, "gfxdecode", m_palette, gfx_pcherc); PC_LPT(config, m_lpt); m_lpt->irq_handler().set(FUNC(isa8_mda_device::pc_cpu_line)); } //------------------------------------------------- // rom_region - device-specific ROM region //------------------------------------------------- const tiny_rom_entry *isa8_hercules_device::device_rom_region() const { return ROM_NAME( hercules ); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // isa8_hercules_device - constructor //------------------------------------------------- isa8_hercules_device::isa8_hercules_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : isa8_mda_device(mconfig, ISA8_HERCULES, tag, owner, clock), m_configuration_switch(0) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void isa8_hercules_device::device_start() { if (m_palette != nullptr && !m_palette->started()) throw device_missing_dependencies(); m_videoram.resize(0x10000); set_isa_device(); m_isa->install_device(0x3b0, 0x3bf, read8sm_delegate(*this, FUNC(isa8_hercules_device::io_read)), write8sm_delegate(*this, FUNC(isa8_hercules_device::io_write))); m_isa->install_bank(0xb0000, 0xbffff, &m_videoram[0]); /* Initialise the mda palette */ for(int i = 0; i < (sizeof(mda_palette) / 3); i++) m_palette->set_pen_color(i, mda_palette[i][0], mda_palette[i][1], mda_palette[i][2]); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void isa8_hercules_device::device_reset() { isa8_mda_device::device_reset(); m_configuration_switch = 0; m_chr_gen = memregion(subtag("gfx1").c_str())->base(); } /*************************************************************************** Draw graphics with 720x348 pixels (default); so called Hercules gfx. The memory layout is divided into 4 banks where of size 0x2000. Every bank holds data for every n'th scanline, 8 pixels per byte, bit 7 being the leftmost. ***************************************************************************/ MC6845_UPDATE_ROW( isa8_hercules_device::hercules_gfx_update_row ) { rgb_t const *const palette = m_palette->palette()->entry_list_raw(); uint32_t *p = &bitmap.pix(y); uint16_t const gfx_base = ((m_mode_control & 0x80) ? 0x8000 : 0x0000) | ((ra & 0x03) << 13); if (y == 0) LOGROW("%11.6f: %-24s\n", machine().time().as_double(), FUNCNAME); for (int i = 0; i < x_count; i++) { uint8_t data; data = m_videoram[gfx_base + ((ma + i) << 1)]; *p++ = palette[(data & 0x80) ? 2 : 0]; *p++ = palette[(data & 0x40) ? 2 : 0]; *p++ = palette[(data & 0x20) ? 2 : 0]; *p++ = palette[(data & 0x10) ? 2 : 0]; *p++ = palette[(data & 0x08) ? 2 : 0]; *p++ = palette[(data & 0x04) ? 2 : 0]; *p++ = palette[(data & 0x02) ? 2 : 0]; *p++ = palette[(data & 0x01) ? 2 : 0]; data = m_videoram[gfx_base + ((ma + i) << 1) + 1]; *p++ = palette[(data & 0x80) ? 2 : 0]; *p++ = palette[(data & 0x40) ? 2 : 0]; *p++ = palette[(data & 0x20) ? 2 : 0]; *p++ = palette[(data & 0x10) ? 2 : 0]; *p++ = palette[(data & 0x08) ? 2 : 0]; *p++ = palette[(data & 0x04) ? 2 : 0]; *p++ = palette[(data & 0x02) ? 2 : 0]; *p++ = palette[(data & 0x01) ? 2 : 0]; } } void isa8_hercules_device::mode_control_w(uint8_t data) { m_mode_control = data; switch( m_mode_control & 0x2a ) { case 0x08: m_update_row_type = MDA_TEXT_INTEN; break; case 0x28: m_update_row_type = MDA_TEXT_BLINK; break; case 0x0A: /* Hercules modes */ case 0x2A: m_update_row_type = HERCULES_GFX_BLINK; break; default: m_update_row_type = -1; } m_crtc->set_unscaled_clock( MDA_CLOCK / (m_mode_control & 0x02 ? 16 : 9) ); m_crtc->set_hpixels_per_column( m_mode_control & 0x02 ? 16 : 9 ); } void isa8_hercules_device::io_write(offs_t offset, uint8_t data) { switch( offset ) { case 0x00: case 0x02: case 0x04: case 0x06: m_crtc->address_w(data); break; case 0x01: case 0x03: case 0x05: case 0x07: m_crtc->register_w(data); break; case 0x08: mode_control_w(data); break; case 0x0c: case 0x0d: case 0x0e: m_lpt->write(offset - 12, data); break; case 0x0f: m_configuration_switch = data; break; } } /* R- CRT status register (see #P139) * (EGA/VGA) input status 1 register * 7 HGC vertical sync in progress * 6-4 adapter 000 hercules * 001 hercules+ * 101 hercules InColor * else unknown * 3 pixel stream (0 black, 1 white) * 2-1 reserved * 0 horizontal drive enable */ uint8_t isa8_hercules_device::status_r() { // Faking pixel stream here if (!machine().side_effects_disabled()) m_pixel++; return m_vsync | ( m_pixel & 0x08 ) | m_hsync; } uint8_t isa8_hercules_device::io_read(offs_t offset) { int data = 0xff; switch( offset ) { case 0x00: case 0x02: case 0x04: case 0x06: /* return last written mc6845 address value here? */ break; case 0x01: case 0x03: case 0x05: case 0x07: data = m_crtc->register_r(); break; case 0x0a: data = status_r(); break; /* LPT ports */ case 0xc: case 0xd: case 0xe: data = m_lpt->read(offset - 0x0c); break; } return data; } DEFINE_DEVICE_TYPE(ISA8_EC1840_0002, isa8_ec1840_0002_device, "ec1840_0002", "EC1840.0002 (MDA)") //------------------------------------------------- // device_add_mconfig - add device configuration //------------------------------------------------- // XXX void isa8_ec1840_0002_device::device_add_mconfig(machine_config &config) { screen_device &screen(SCREEN(config, MDA_SCREEN_NAME, SCREEN_TYPE_RASTER)); screen.set_raw(MDA_CLOCK, 792, 0, 640, 370, 0, 350); screen.set_screen_update(MC6845_NAME, FUNC(mc6845_device::screen_update)); PALETTE(config, m_palette).set_entries(4); MC6845(config, m_crtc, MDA_CLOCK/8); m_crtc->set_screen(MDA_SCREEN_NAME); m_crtc->set_show_border_area(false); m_crtc->set_char_width(8); m_crtc->set_update_row_callback(FUNC(isa8_mda_device::crtc_update_row)); m_crtc->out_hsync_callback().set(FUNC(isa8_mda_device::hsync_changed)); m_crtc->out_vsync_callback().set(FUNC(isa8_mda_device::vsync_changed)); } //------------------------------------------------- // isa8_ec1840_0002_device - constructor //------------------------------------------------- isa8_ec1840_0002_device::isa8_ec1840_0002_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : isa8_mda_device(mconfig, ISA8_EC1840_0002, tag, owner, clock), m_soft_chr_gen(nullptr) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void isa8_ec1840_0002_device::device_start() { isa8_mda_device::device_start(); m_soft_chr_gen = std::make_unique(0x2000); m_isa->install_bank(0xdc000, 0xddfff, m_soft_chr_gen.get()); m_isa->install_bank(0xde000, 0xdffff, m_soft_chr_gen.get()); } void isa8_ec1840_0002_device::device_reset() { isa8_mda_device::device_reset(); m_chr_gen = m_soft_chr_gen.get(); } /*************************************************************************** Draw text mode with 80x25 characters (default) and intense background. The character cell size is 8x14. ***************************************************************************/ MC6845_UPDATE_ROW( isa8_ec1840_0002_device::mda_lowres_text_inten_update_row ) { rgb_t const *const palette = m_palette->palette()->entry_list_raw(); uint32_t *p = &bitmap.pix(y); uint16_t const chr_base = ra; if (y == 0) LOGROW("%11.6f: %-24s\n", machine().time().as_double(), FUNCNAME); for (int i = 0; i < x_count; i++) { uint16_t const offset = ((ma + i) << 1) & 0x0fff; uint8_t const chr = m_videoram[offset]; uint8_t const attr = m_videoram[offset + 1]; uint8_t data = m_chr_gen[(chr_base + chr * 16) << 1]; uint8_t fg = (attr & 0x08) ? 3 : 2; uint8_t bg = 0; if ((attr & ~0x88) == 0) { data = 0x00; } switch (attr) { case 0x70: bg = 2; fg = 0; break; case 0x78: bg = 2; fg = 1; break; case 0xf0: bg = 3; fg = 0; break; case 0xf8: bg = 3; fg = 1; break; } if ((i == cursor_x && (m_framecnt & 0x08)) || (attr & 0x07) == 0x01) { data = 0xff; } *p++ = palette[(data & 0x80) ? fg : bg]; *p++ = palette[(data & 0x40) ? fg : bg]; *p++ = palette[(data & 0x20) ? fg : bg]; *p++ = palette[(data & 0x10) ? fg : bg]; *p++ = palette[(data & 0x08) ? fg : bg]; *p++ = palette[(data & 0x04) ? fg : bg]; *p++ = palette[(data & 0x02) ? fg : bg]; *p++ = palette[(data & 0x01) ? fg : bg]; } } /*************************************************************************** Draw text mode with 80x25 characters (default) and blinking characters. The character cell size is 8x14. ***************************************************************************/ MC6845_UPDATE_ROW( isa8_ec1840_0002_device::mda_lowres_text_blink_update_row ) { rgb_t const *const palette = m_palette->palette()->entry_list_raw(); uint32_t *p = &bitmap.pix(y); uint16_t const chr_base = ra; if (y == 0) LOGROW("%11.6f: %-24s\n", machine().time().as_double(), FUNCNAME); for (int i = 0; i < x_count; i++) { uint16_t const offset = ((ma + i) << 1) & 0x0fff; uint8_t const chr = m_videoram[offset]; uint8_t const attr = m_videoram[offset + 1]; uint8_t data = m_chr_gen[(chr_base + chr * 16) << 1]; uint8_t fg = (attr & 0x08) ? 3 : 2; uint8_t bg = 0; if ((attr & ~0x88) == 0) { data = 0x00; } switch (attr) { case 0x70: case 0xf0: bg = 2; fg = 0; break; case 0x78: case 0xf8: bg = 2; fg = 1; break; } if ((attr & 0x07) == 0x01) { data = 0xff; } if (i == cursor_x) { if (m_framecnt & 0x08) { data = 0xff; } } else { if ((attr & 0x80) && (m_framecnt & 0x10)) { data = 0x00; } } *p++ = palette[(data & 0x80) ? fg : bg]; *p++ = palette[(data & 0x40) ? fg : bg]; *p++ = palette[(data & 0x20) ? fg : bg]; *p++ = palette[(data & 0x10) ? fg : bg]; *p++ = palette[(data & 0x08) ? fg : bg]; *p++ = palette[(data & 0x04) ? fg : bg]; *p++ = palette[(data & 0x02) ? fg : bg]; *p++ = palette[(data & 0x01) ? fg : bg]; } } void isa8_ec1840_0002_device::mode_control_w(uint8_t data) { m_mode_control = data; switch( m_mode_control & 0x2a ) { case 0x08: m_update_row_type = MDA_LOWRES_TEXT_INTEN; break; case 0x28: m_update_row_type = MDA_LOWRES_TEXT_BLINK; break; default: m_update_row_type = -1; } } MC6845_UPDATE_ROW( isa8_ec1840_0002_device::crtc_update_row ) { if (m_update_row_type == -1) return; switch (m_update_row_type) { case MDA_LOWRES_TEXT_INTEN: mda_lowres_text_inten_update_row(bitmap, cliprect, ma, ra, y, x_count, cursor_x, de, hbp, vbp); break; case MDA_LOWRES_TEXT_BLINK: mda_lowres_text_blink_update_row(bitmap, cliprect, ma, ra, y, x_count, cursor_x, de, hbp, vbp); break; } }