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Diffstat (limited to 'src/mess/video/pc1512.c')
-rw-r--r--src/mess/video/pc1512.c606
1 files changed, 0 insertions, 606 deletions
diff --git a/src/mess/video/pc1512.c b/src/mess/video/pc1512.c
deleted file mode 100644
index cecfe291d96..00000000000
--- a/src/mess/video/pc1512.c
+++ /dev/null
@@ -1,606 +0,0 @@
-// license:BSD-3-Clause
-// copyright-holders:Curt Coder
-#include "includes/pc1512.h"
-
-
-
-//**************************************************************************
-// CONSTANTS
-//**************************************************************************
-
-#define LOG 0
-
-
-static const rgb_t PALETTE_1512[] =
-{
- rgb_t::black,
- rgb_t(0x00, 0x00, 0xaa),
- rgb_t(0x00, 0xaa, 0x00),
- rgb_t(0x00, 0xaa, 0xaa),
- rgb_t(0xaa, 0x00, 0x00),
- rgb_t(0xaa, 0x00, 0xaa),
- rgb_t(0xaa, 0x55, 0x00),
- rgb_t(0xaa, 0xaa, 0xaa),
- rgb_t(0x55, 0x55, 0x55),
- rgb_t(0x55, 0x55, 0xff),
- rgb_t(0x55, 0xff, 0x55),
- rgb_t(0x55, 0xff, 0xff),
- rgb_t(0xff, 0x55, 0x55),
- rgb_t(0xff, 0x55, 0xff),
- rgb_t(0xff, 0xff, 0x55),
- rgb_t::white
-};
-
-static const int PALETTE_0[] = { 0, 3, 5, 7 };
-static const int PALETTE_1[] = { 0, 2, 4, 6 };
-static const int PALETTE_2[] = { 0, 3, 4, 7 };
-
-
-enum
-{
- ALPHA_40 = 0,
- ALPHA_80,
- GRAPHICS_1,
- GRAPHICS_2
-};
-
-
-#define MODE_ALPHA_80 0x01
-#define MODE_GRAPHICS 0x02
-#define MODE_PALETTE_2 0x04
-#define MODE_ENABLE_VIDEO 0x08
-#define MODE_GRAPHICS_2 0x10
-#define MODE_BLINK 0x20
-
-
-#define COLOR_INTENSITY 0x10
-#define COLOR_PALETTE_1 0x20
-
-
-#define VFP_LORES 22
-#define HFP_LORES 16
-
-
-
-//**************************************************************************
-// VIDEO RAM ACCESS
-//**************************************************************************
-
-//-------------------------------------------------
-// video_ram_r -
-//-------------------------------------------------
-
-READ8_MEMBER( pc1512_state::video_ram_r )
-{
- UINT8 data = 0;
-
- switch (get_display_mode(m_vdu_mode))
- {
- case ALPHA_40:
- case ALPHA_80:
- data = m_video_ram[offset];
- break;
-
- case GRAPHICS_1:
- data = m_video_ram[(offset << 2) | 3];
- break;
-
- case GRAPHICS_2:
- data = m_video_ram[(offset << 2) | (m_vdu_rdsel ^ 0x03)];
- break;
- }
-
- return data;
-}
-
-
-//-------------------------------------------------
-// video_ram_w -
-//-------------------------------------------------
-
-WRITE8_MEMBER( pc1512_state::video_ram_w )
-{
- switch (get_display_mode(m_vdu_mode))
- {
- case ALPHA_40:
- case ALPHA_80:
- m_video_ram[offset] = data;
- break;
-
- case GRAPHICS_1:
- m_video_ram[(offset << 2) | 3] = data;
- m_video_ram[(offset << 2) | 2] = data;
- m_video_ram[(offset << 2) | 1] = data;
- m_video_ram[(offset << 2) | 0] = data;
- break;
-
- case GRAPHICS_2:
- if (BIT(m_vdu_plane, 0)) m_video_ram[(offset << 2) | 3] = data;
- if (BIT(m_vdu_plane, 1)) m_video_ram[(offset << 2) | 2] = data;
- if (BIT(m_vdu_plane, 2)) m_video_ram[(offset << 2) | 1] = data;
- if (BIT(m_vdu_plane, 3)) m_video_ram[(offset << 2) | 0] = data;
- break;
- }
-}
-
-
-//-------------------------------------------------
-// vdu_r -
-//-------------------------------------------------
-
-READ8_MEMBER( pc1512_state::vdu_r )
-{
- UINT8 data = 0;
-
- switch (offset)
- {
- case 1: case 3: case 5: case 7:
- data = m_vdu->register_r(space, 0);
- break;
-
- case 0xa: // VDU Status
- /*
-
- bit description
-
- 0 Toggle Bit
- 1 Light-pen latch select
- 2 Light-pen switch off
- 3 Frame Flyback Time
- 4
- 5
- 6
- 7
-
- */
-
- // toggle bit
- data |= m_toggle;
- m_toggle = !m_toggle;
-
- // light pen latch
- data |= m_lpen << 1;
-
- // light pen switch
- data |= 0x04;
-
- // vertical sync
- //data |= m_vdu->vsync_r();
- int flyback = 0;
-
- if (machine().first_screen()->vpos() < VFP_LORES - 16) flyback = 1;
- if (machine().first_screen()->vpos() > VFP_LORES + 200) flyback = 1;
-
- data |= flyback << 3;
- break;
- }
-
- return data;
-}
-
-
-//-------------------------------------------------
-// vdu_w -
-//-------------------------------------------------
-
-WRITE8_MEMBER( pc1512_state::vdu_w )
-{
- switch (offset)
- {
- case 0: case 2: case 4: case 6:
- m_vdu->address_w(space, 0, data);
- break;
-
- case 1: case 3: case 5: case 7:
- m_vdu->register_w(space, 0, data);
- break;
-
- case 8: // VDU Mode Control
- /*
-
- bit description
-
- 0 Select Alpha 80 Char mode (de-select 40 Char mode)
- 1 Select Graphics modes (de-select Alpha modes)
- 2 Select Palette 2 (de-select palettes 0,1)
- 3 Enable Video Display
- 4 Select Graphics Mode 2 (de-select graphics mode 1)
- 5 Enable Blinking Chars (disable intensified backgrounds)
- 6
- 7
-
- */
-
- if (LOG) logerror("VDU Mode Control %02x\n", data);
-
- if ((get_display_mode(m_vdu_mode) != GRAPHICS_2) && (get_display_mode(data) == GRAPHICS_2))
- {
- m_vdu_plane = 0x0f;
- m_vdu_border = 0;
- }
-
- if (get_display_mode(data) != GRAPHICS_2)
- {
- m_vdu_rdsel = 0;
- }
-
- if (get_display_mode(m_vdu_mode) != get_display_mode(data))
- {
- switch (get_display_mode(data))
- {
- case ALPHA_40:
- case GRAPHICS_1:
- m_vdu->set_hpixels_per_column(8);
- m_vdu->set_clock(XTAL_28_63636MHz/32);
- break;
-
- case ALPHA_80:
- m_vdu->set_hpixels_per_column(8);
- m_vdu->set_clock(XTAL_28_63636MHz/16);
- break;
-
- case GRAPHICS_2:
- m_vdu->set_hpixels_per_column(16);
- m_vdu->set_clock(XTAL_28_63636MHz/32);
- break;
- }
- }
-
- m_vdu_mode = data;
- break;
-
- case 9: // VDU Colour Select
- /*
-
- bit description
-
- 0
- 1
- 2
- 3
- 4
- 5
- 6
- 7
-
- */
-
- if (LOG) logerror("VDU Colour Select %02x\n", data);
-
- m_vdu_color = data;
- break;
-
- case 0xb: // Clear Light Pen Latch
- if (LOG) logerror("VDU Clear Light Pen Latch\n");
-
- m_lpen = 0;
- break;
-
- case 0xc: // Set Light Pen Latch
- if (LOG) logerror("VDU Set Light Pen Latch\n");
-
- if (!m_lpen)
- {
- m_vdu->assert_light_pen_input();
- }
-
- m_lpen = 1;
- break;
-
- case 0xd: // VDU Colour Plane Write
- /*
-
- bit description
-
- 0 Allow CPU write to Blue Plane
- 1 Allow CPU write to Green Plane
- 2 Allow CPU write to Red Plane
- 3 Allow CPU write to Intensity Plane
- 4
- 5
- 6
- 7
-
- */
-
- if (LOG) logerror("VDU Colour Plane Write %01x\n", data & 0x0f);
-
- if (get_display_mode(m_vdu_mode) == GRAPHICS_2)
- {
- m_vdu_plane = data;
- }
- break;
-
- case 0xe: // VDU Colour Plane Read
- /*
-
- bit description
-
- 0 Read Select bit 0 (RDSEL0)
- 1 Read Select bit 1 (RDSEL1)
- 2
- 3
- 4
- 5
- 6
- 7
-
- */
-
- if (LOG) logerror("VDU Colour Plane Read %u\n", data & 0x03);
-
- if (get_display_mode(m_vdu_mode) == GRAPHICS_2)
- {
- m_vdu_rdsel = data & 0x03;
- }
- break;
-
- case 0xf: // VDU Graphics Mode 2 Border
- /*
-
- bit description
-
- 0 Border Blue
- 1 Border Green
- 2 Border Red
- 3 Border Intensity
- 4
- 5
- 6
- 7
-
- */
-
- if (LOG) logerror("VDU Graphics Mode 2 Border %u\n", data & 0x0f);
-
- m_vdu_border = data;
- break;
- }
-}
-
-
-//-------------------------------------------------
-// mc6845
-//-------------------------------------------------
-
-int pc1512_state::get_display_mode(UINT8 mode)
-{
- if (mode & MODE_GRAPHICS)
- {
- if (mode & MODE_GRAPHICS_2)
- {
- return GRAPHICS_2;
- }
- else
- {
- return GRAPHICS_1;
- }
- }
- else
- {
- if (mode & MODE_ALPHA_80)
- {
- return ALPHA_80;
- }
- else
- {
- return ALPHA_40;
- }
- }
-}
-
-offs_t pc1512_state::get_char_rom_offset()
-{
- return ((m_lk->read() >> 5) & 0x03) << 11;
-}
-
-MC6845_UPDATE_ROW( pc1512_state::draw_alpha )
-{
- offs_t char_rom_offset = get_char_rom_offset();
- UINT32 *p = &bitmap.pix32(y + vbp, hbp);
-
- if (get_display_mode(m_vdu_mode) == ALPHA_40)
- p = &bitmap.pix32(y + vbp, hbp);
-
- if (y > 199) return;
-
- for (int column = 0; column < x_count; column++)
- {
- UINT8 code = m_video_ram[(ma + column) << 1];
- UINT8 attr = m_video_ram[((ma + column) << 1) + 1];
- int fg = attr & 0x0f;
- int bg = attr >> 4;
-
- if (m_vdu_mode & MODE_BLINK)
- {
- bg &= 0x07;
-
- if (BIT(attr, 7) && !m_blink)
- {
- fg = bg;
- }
- }
-
- offs_t addr = char_rom_offset | (code << 3) | (ra & 0x07);
- UINT8 data = m_char_rom->base()[addr & 0x1fff];
-
- if ((column == cursor_x) && m_cursor)
- {
- data = 0xff;
- }
-
- for (int bit = 0; bit < 8; bit++)
- {
- int color = BIT(data, 7) ? fg : bg;
-
- *p = PALETTE_1512[de ? color : 0]; p++;
-
- data <<= 1;
- }
- }
-}
-
-int pc1512_state::get_color(UINT8 data)
-{
- if (data == 0) return m_vdu_color & 0x0f;
-
- int color = PALETTE_0[data & 0x03];
-
- if (m_vdu_color & COLOR_PALETTE_1)
- {
- color = PALETTE_1[data & 0x03];
- }
- else if (m_vdu_mode & MODE_PALETTE_2)
- {
- color = PALETTE_2[data & 0x03];
- }
-
- if (m_vdu_color & COLOR_INTENSITY)
- {
- color += 8;
- }
-
- return color;
-}
-
-MC6845_UPDATE_ROW( pc1512_state::draw_graphics_1 )
-{
- if (y > 199) return;
-
- UINT32 *p = &bitmap.pix32(y + vbp, hbp);
-
- for (int column = 0; column < x_count; column++)
- {
- offs_t offset = ((ra & 0x01) << 15) | ((ma + column) << 3);
-
- UINT16 b = (m_video_ram[offset | 3] << 8) | m_video_ram[offset | 7];
-
- for (int x = 0; x < 8; x++)
- {
- *p = PALETTE_1512[de ? get_color((BIT(b, 15) << 1) | BIT(b, 14)) : 0]; p++;
- b <<= 2;
- }
- }
-}
-
-MC6845_UPDATE_ROW( pc1512_state::draw_graphics_2 )
-{
- if (y > 199) return;
-
- UINT32 *p = &bitmap.pix32(y + vbp, hbp);
-
- for (int column = 0; column < x_count; column++)
- {
- offs_t offset = ((ra & 0x01) << 15) | ((ma + column) << 3);
-
- UINT16 i = BIT(m_vdu_color, 3) ? ((m_video_ram[offset | 0] << 8) | m_video_ram[offset | 4]) : 0;
- UINT16 r = BIT(m_vdu_color, 2) ? ((m_video_ram[offset | 1] << 8) | m_video_ram[offset | 5]) : 0;
- UINT16 g = BIT(m_vdu_color, 1) ? ((m_video_ram[offset | 2] << 8) | m_video_ram[offset | 6]) : 0;
- UINT16 b = BIT(m_vdu_color, 0) ? ((m_video_ram[offset | 3] << 8) | m_video_ram[offset | 7]) : 0;
-
- for (int x = 0; x < 16; x++)
- {
- *p = PALETTE_1512[de ? (BIT(i, 15) << 3) | (BIT(r, 15) << 2) | (BIT(g, 15) << 1) | BIT(b, 15) : 0]; p++;
- i <<= 1; r <<= 1; g <<= 1; b <<= 1;
- }
- }
-}
-
-MC6845_UPDATE_ROW( pc1512_state::crtc_update_row )
-{
- switch (get_display_mode(m_vdu_mode))
- {
- case ALPHA_40:
- case ALPHA_80:
- draw_alpha(bitmap, cliprect, ma, ra, y, x_count, cursor_x, de, hbp, vbp);
- break;
-
- case GRAPHICS_1:
- draw_graphics_1(bitmap, cliprect, ma, ra, y, x_count, cursor_x, de, hbp, vbp);
- break;
-
- case GRAPHICS_2:
- draw_graphics_2(bitmap, cliprect, ma, ra, y, x_count, cursor_x, de, hbp, vbp);
- break;
- }
-}
-
-
-void pc1512_state::video_start()
-{
- // allocate memory
- m_video_ram.allocate(0x10000);
-}
-
-
-UINT32 pc1512_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
-{
- if (m_vdu_mode & MODE_ENABLE_VIDEO)
- {
- m_blink_ctr++;
-
- if (m_blink_ctr == 0x08)
- {
- m_cursor = !m_cursor;
- }
- else if (m_blink_ctr == 0x10)
- {
- m_cursor = !m_cursor;
- m_blink = !m_blink;
- m_blink_ctr = 0;
- }
-
- switch (get_display_mode(m_vdu_mode))
- {
- case ALPHA_40:
- case GRAPHICS_1:
- screen.set_visible_area(0, 359, 0, 245);
- break;
-
- case ALPHA_80:
- case GRAPHICS_2:
- screen.set_visible_area(0, 831, 0, 245);
- break;
- }
-
- switch (get_display_mode(m_vdu_mode))
- {
- case ALPHA_40:
- case ALPHA_80:
- case GRAPHICS_1:
- bitmap.fill(PALETTE_1512[m_vdu_color & 0x0f], cliprect);
- break;
-
- case GRAPHICS_2:
- bitmap.fill(PALETTE_1512[m_vdu_border & 0x0f], cliprect);
- break;
- }
-
- m_vdu->screen_update(screen, bitmap, cliprect);
- }
- else
- {
- bitmap.fill(rgb_t::black, cliprect);
- }
-
- return 0;
-}
-
-
-//-------------------------------------------------
-// MACHINE_CONFIG( pc1512 )
-//-------------------------------------------------
-
-MACHINE_CONFIG_FRAGMENT( pc1512_video )
- MCFG_SCREEN_ADD(SCREEN_TAG, RASTER)
- MCFG_SCREEN_UPDATE_DRIVER(pc1512_state, screen_update)
- MCFG_SCREEN_SIZE(80*8, 24*8)
- MCFG_SCREEN_VISIBLE_AREA(0, 80*8-1, 0, 24*8-1)
- MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500))
- MCFG_SCREEN_REFRESH_RATE(50)
-
- MCFG_MC6845_ADD(AMS40041_TAG, AMS40041, SCREEN_TAG, XTAL_28_63636MHz/32)
- MCFG_MC6845_SHOW_BORDER_AREA(true)
- MCFG_MC6845_CHAR_WIDTH(8)
- MCFG_MC6845_UPDATE_ROW_CB(pc1512_state, crtc_update_row)
-MACHINE_CONFIG_END