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video/315_5124.cpp: Improved registers 03 and 04 behavior in mode 4 [Enik Land] (#7377)
* Registers 03 and 04 behavior in mode 4 * Disable sprites in mode 3 for real * Use logmacro.h for configurable logging
This commit is contained in:
enikland2
GitHub
parent
7b06863d31
commit
9ed7b09671
@ -16,7 +16,7 @@
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To do:
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- Register 3 behaviour in mode 4
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- Mid-scanline changes
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- VRAM/CRAM access constraints
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@ -68,6 +68,25 @@ PAL frame timing
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#include "video/315_5124.h"
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/****************************************************************************
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* Configurable logging
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****************************************************************************/
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#define LOG_GENERAL (1U << 0)
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#define LOG_VIDMODE (1U << 1)
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#define LOG_REGWRITE (1U << 2)
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#define LOG_VCOUNTREAD (1U << 3)
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//#define VERBOSE (LOG_GENERAL | LOG_VIDMODE | LOG_REGWRITE | LOG_VCOUNTREAD)
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//#define LOG_OUTPUT_FUNC printf
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#include "logmacro.h"
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#define LOGVIDMODE(...) LOGMASKED(LOG_VIDMODE, __VA_ARGS__)
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#define LOGREGWRITE(...) LOGMASKED(LOG_REGWRITE, __VA_ARGS__)
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#define LOGVCOUNTREAD(...) LOGMASKED(LOG_VCOUNTREAD, __VA_ARGS__)
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/****************************************************************************/
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#define SEGA315_5124_PALETTE_SIZE (64 + 16)
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#define SEGA315_5377_PALETTE_SIZE 4096
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@ -337,7 +356,7 @@ void sega315_5124_device::select_display_mode()
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else if (!M1 && !M2 && M3) // Mode 3 (Multicolor Mode) */
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m_vdp_mode = 3;
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else
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logerror("Unknown video mode detected (M1 = %c, M2 = %c, M3 = %c, M4 = %c)\n", M1 ? '1' : '0', M2 ? '1' : '0', M3 ? '1' : '0', M4 ? '1' : '0');
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LOGVIDMODE("Unknown video mode detected (M1 = %c, M2 = %c, M3 = %c, M4 = %c)\n", M1 ? '1' : '0', M2 ? '1' : '0', M3 ? '1' : '0', M4 ? '1' : '0');
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}
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}
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@ -351,7 +370,7 @@ void sega315_5313_mode4_device::select_display_mode()
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{
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/* mode 5, not implemented */
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m_vdp_mode = 5;
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logerror("Switched to unimplemented video mode 5 !\n");
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LOGVIDMODE("Switched to unimplemented video mode 5 !\n");
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}
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else
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{
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@ -391,6 +410,24 @@ void sega315_5124_device::set_frame_timing()
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u8 sega315_5124_device::vcount_read()
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{
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u8 vc = vcount();
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LOGVCOUNTREAD(
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"fr %d vpos %3d hpos %3d hc 0x%02X %s: vcount read value 0x%02X\n",
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screen().frame_number(),
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screen().vpos(),
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screen_hpos(),
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hcount(),
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machine().describe_context(),
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vc
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);
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return vc;
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}
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u8 sega315_5124_device::vcount()
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{
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const int active_scr_start = m_frame_timing[VERTICAL_SYNC] + m_frame_timing[TOP_BLANKING] + m_frame_timing[TOP_BORDER];
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int vpos = screen().vpos();
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@ -414,14 +451,20 @@ u8 sega315_5124_device::hcount_read()
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void sega315_5124_device::hcount_latch()
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{
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m_hcounter = hcount();
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m_hcounter_latched = true;
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}
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u8 sega315_5124_device::hcount()
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{
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/* The hcount value returned by the VDP seems to be based on the previous hpos */
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int hclock = screen_hpos() - 1;
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if (hclock < 0)
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hclock += WIDTH;
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m_hcounter = ((hclock - 46) >> 1) & 0xff;
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m_hcounter_latched = true;
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return ((hclock - 46) >> 1) & 0xff;
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}
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@ -876,14 +919,14 @@ void sega315_5124_device::control_write(u8 data)
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break;
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}
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m_reg[reg_num] = m_addr & 0xff;
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//logerror("%s: %s: setting register %x to %02x\n", machine().describe_context(), tag(), reg_num, m_addr & 0xff);
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LOGREGWRITE("%s: %s: setting register %x to %02x\n", machine().describe_context(), tag(), reg_num, m_addr & 0xff);
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switch (reg_num)
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{
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case 0:
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set_display_settings();
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if (BIT(m_addr, 1))
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logerror("overscan enabled.\n");
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LOGVIDMODE("overscan enabled.\n");
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break;
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case 1:
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set_display_settings();
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@ -947,18 +990,6 @@ void sega315_5124_device::control_write(u8 data)
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}
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u16 sega315_5124_device::name_table_row_mode4(int row)
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{
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return ((row >> 3) << 6) & (((m_reg[0x02] & 0x01) << 10) | ((m_reg[0x04] & 0x03) << 11) | 0x23ff);
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}
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u16 sega315_5246_device::name_table_row_mode4(int row)
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{
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return (row >> 3) << 6;
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}
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void sega315_5124_device::draw_leftmost_pixels_mode4(int *line_buffer, int *priority_selected, int fine_x_scroll, int palette_selected, int tile_line)
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{
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// To draw the leftmost pixels when they aren't part of a tile column
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@ -1009,6 +1040,42 @@ void sega315_5313_mode4_device::draw_leftmost_pixels_mode4(int *line_buffer, int
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}
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u16 sega315_5124_device::name_row_mode4(u16 row)
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{
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return row & (((m_reg[0x02] & 0x01) << 10) | 0x3bff);
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}
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u16 sega315_5246_device::name_row_mode4(u16 row)
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{
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return row;
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}
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u16 sega315_5124_device::tile1_select_mode4(u16 tile_number)
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{
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return tile_number & ((m_reg[0x03] << 1) | 1);
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}
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u16 sega315_5246_device::tile1_select_mode4(u16 tile_number)
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{
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return tile_number;
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}
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u16 sega315_5124_device::tile2_select_mode4(u16 tile_number)
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{
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return tile_number & (((m_reg[0x04] & 0x07) << 6) | 0x03f);
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}
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u16 sega315_5246_device::tile2_select_mode4(u16 tile_number)
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{
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return tile_number;
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}
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void sega315_5124_device::draw_scanline_mode4(int *line_buffer, int *priority_selected, int line)
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{
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/* if top 2 rows of screen not affected by horizontal scrolling, then x_scroll = 0 */
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@ -1019,15 +1086,15 @@ void sega315_5124_device::draw_scanline_mode4(int *line_buffer, int *priority_se
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const int fine_x_scroll = (x_scroll & 0x07);
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int scroll_mod;
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u16 name_table_address;
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u16 name_base;
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if (m_y_pixels != 192)
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{
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name_table_address = ((m_reg[0x02] & 0x0c) << 10) | 0x0700;
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name_base = ((m_reg[0x02] & 0x0c) << 10) | 0x0700;
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scroll_mod = 256;
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}
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else
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{
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name_table_address = (m_reg[0x02] << 10) & 0x3800;
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name_base = (m_reg[0x02] << 10) & 0x3800;
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scroll_mod = 224;
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}
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@ -1041,9 +1108,11 @@ void sega315_5124_device::draw_scanline_mode4(int *line_buffer, int *priority_se
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/* vertical scrolling when bit 7 of reg[0x00] is set */
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const int y_scroll = (BIT(m_reg[0x00], 7) && (tile_column > 23)) ? 0 : m_reg9copy;
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const u16 tile_data = space().read_word(name_table_address + name_table_row_mode4((line + y_scroll) % scroll_mod) + table_column);
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const u16 name_row = name_row_mode4((((line + y_scroll) % scroll_mod) >> 3) << 6);
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const u16 tile_data = space().read_word(name_base + name_row + table_column);
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const int tile_selected = (tile_data & 0x01ff);
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const int tile1_selected = tile1_select_mode4(tile_data & 0x01ff);
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const int tile2_selected = tile2_select_mode4(tile_data & 0x01ff);
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const int priority_select = tile_data & PRIORITY_BIT;
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const int palette_selected = BIT(tile_data, 11);
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const int vert_selected = BIT(tile_data, 10);
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@ -1053,10 +1122,10 @@ void sega315_5124_device::draw_scanline_mode4(int *line_buffer, int *priority_se
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if (vert_selected)
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tile_line = 0x07 - tile_line;
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const int bit_plane_0 = space().read_byte(((tile_selected << 5) + ((tile_line & 0x07) << 2)) + 0x00);
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const int bit_plane_1 = space().read_byte(((tile_selected << 5) + ((tile_line & 0x07) << 2)) + 0x01);
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const int bit_plane_2 = space().read_byte(((tile_selected << 5) + ((tile_line & 0x07) << 2)) + 0x02);
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const int bit_plane_3 = space().read_byte(((tile_selected << 5) + ((tile_line & 0x07) << 2)) + 0x03);
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const u8 bit_plane_0 = space().read_byte(((tile1_selected << 5) + ((tile_line & 0x07) << 2)) + 0x00);
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const u8 bit_plane_1 = space().read_byte(((tile1_selected << 5) + ((tile_line & 0x07) << 2)) + 0x01);
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const u8 bit_plane_2 = space().read_byte(((tile2_selected << 5) + ((tile_line & 0x07) << 2)) + 0x02);
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const u8 bit_plane_3 = space().read_byte(((tile2_selected << 5) + ((tile_line & 0x07) << 2)) + 0x03);
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/* Column 0 is the leftmost tile column that completely entered in the screen.
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If the leftmost pixels aren't part of a complete tile, due to horizontal
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@ -1088,25 +1157,25 @@ void sega315_5124_device::draw_scanline_mode4(int *line_buffer, int *priority_se
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}
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u16 sega315_5124_device::sprite_attributes_addr_mode4(u16 base)
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u8 sega315_5124_device::sprite_attribute_extra_offset_mode4(u8 offset)
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{
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return base & ((BIT(m_reg[0x05], 0) << 7) | 0x3f7f);
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return offset & ((BIT(m_reg[0x05], 0) << 7) | 0x7f);
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}
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u16 sega315_5246_device::sprite_attributes_addr_mode4(u16 base)
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u8 sega315_5246_device::sprite_attribute_extra_offset_mode4(u8 offset)
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{
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return base;
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return offset;
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}
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u8 sega315_5124_device::sprite_tile_mask_mode4(u8 tile_number)
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u8 sega315_5124_device::sprite_tile_select_mode4(u8 tile_number)
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{
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return tile_number & (((m_reg[0x06] & 0x03) << 6) | 0x3f);
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}
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u8 sega315_5246_device::sprite_tile_mask_mode4(u8 tile_number)
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u8 sega315_5246_device::sprite_tile_select_mode4(u8 tile_number)
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{
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return tile_number;
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}
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@ -1140,20 +1209,25 @@ void sega315_5313_mode4_device::sprite_count_overflow(int line, int sprite_index
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void sega315_5124_device::select_sprites(int line)
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{
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m_sprite_count = 0;
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if (m_vdp_mode == 1)
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{
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/* Text mode, no sprite processing */
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return;
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}
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/* Check if SI is set */
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m_sprite_height = BIT(m_reg[0x01], 1) ? 16 : 8;
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/* Check if MAG is set */
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m_sprite_zoom_scale = BIT(m_reg[0x01], 0) ? 2 : 1;
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m_sprite_count = 0;
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if (m_vdp_mode == 0 || m_vdp_mode == 2)
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if (m_vdp_mode < 4)
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{
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/* TMS9918 compatibility sprites */
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const int max_sprites = 4;
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m_sprite_base = ((m_reg[0x05] & 0x7f) << 7);
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m_sprite_attribute_base = ((m_reg[0x05] & 0x7f) << 7);
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for (int sprite_index = 0; (sprite_index < 32 * 4); sprite_index += 4)
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{
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@ -1161,7 +1235,7 @@ void sega315_5124_device::select_sprites(int line)
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because the logical start point is slightly shifted on the scanline */
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int parse_line = line - 1;
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int sprite_y = space().read_byte(m_sprite_base + sprite_index);
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int sprite_y = space().read_byte(m_sprite_attribute_base + sprite_index);
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if (sprite_y == 0xd0)
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break;
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@ -1182,9 +1256,9 @@ void sega315_5124_device::select_sprites(int line)
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{
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if (m_sprite_count < max_sprites)
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{
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const int sprite_x = space().read_byte(m_sprite_base + sprite_index + 1);
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int sprite_tile_selected = space().read_byte(m_sprite_base + sprite_index + 2);
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const u8 flags = space().read_byte(m_sprite_base + sprite_index + 3);
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const int sprite_x = space().read_byte(m_sprite_attribute_base + sprite_index + 1);
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int sprite_tile_selected = space().read_byte(m_sprite_attribute_base + sprite_index + 2);
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const u8 flags = space().read_byte(m_sprite_attribute_base + sprite_index + 3);
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int sprite_line = parse_line - sprite_y;
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@ -1219,7 +1293,8 @@ void sega315_5124_device::select_sprites(int line)
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const int max_sprites = 8;
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m_sprite_base = (m_reg[0x05] << 7) & 0x3f00;
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m_sprite_attribute_base = (m_reg[0x05] << 7) & 0x3f00;
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const u16 sprite_attribute_extra_base = m_sprite_attribute_base + sprite_attribute_extra_offset_mode4(0x80);
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for (int sprite_index = 0; (sprite_index < 64); sprite_index++)
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{
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@ -1227,7 +1302,7 @@ void sega315_5124_device::select_sprites(int line)
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because the logical start point is slightly shifted on the scanline */
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int parse_line = line - 1;
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int sprite_y = space().read_byte(m_sprite_base + sprite_index);
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int sprite_y = space().read_byte(m_sprite_attribute_base + sprite_index);
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if (m_y_pixels == 192 && sprite_y == 0xd0)
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break;
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@ -1249,10 +1324,10 @@ void sega315_5124_device::select_sprites(int line)
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if (m_sprite_count < max_sprites)
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{
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const int sprite_line = parse_line - sprite_y;
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int sprite_x = space().read_byte(sprite_attributes_addr_mode4(m_sprite_base + 0x80) + (sprite_index << 1));
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int sprite_tile_selected = space().read_byte(sprite_attributes_addr_mode4(m_sprite_base + 0x81) + (sprite_index << 1));
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int sprite_x = space().read_byte(sprite_attribute_extra_base + (sprite_index << 1));
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int sprite_tile_number = space().read_byte(sprite_attribute_extra_base + (sprite_index << 1) + 1);
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sprite_tile_selected = sprite_tile_mask_mode4(sprite_tile_selected);
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int sprite_tile_selected = sprite_tile_select_mode4(sprite_tile_number);
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if (BIT(m_reg[0x00], 3))
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sprite_x -= 0x08; /* sprite shift */
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@ -1509,17 +1584,18 @@ void sega315_5124_device::draw_sprites_tms9918_mode(int *line_buffer, int line)
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// Display mode 2 (Graphics II Mode)
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void sega315_5124_device::draw_scanline_mode2(int *line_buffer, int line)
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{
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const u16 name_table_base = ((m_reg[0x02] & 0x0f) << 10) + ((line >> 3) * 32);
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const u16 name_base = ((m_reg[0x02] & 0x0f) << 10);
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const u16 color_base = ((m_reg[0x03] & 0x80) << 6);
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const int color_mask = ((m_reg[0x03] & 0x7f) << 3) | 0x07;
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const u16 pattern_base = ((m_reg[0x04] & 0x04) << 11);
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const int pattern_mask = ((m_reg[0x04] & 0x03) << 8) | 0xff;
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const int pattern_offset = (line & 0xc0) << 2;
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const u16 name_row_base = name_base + ((line >> 3) * 32);
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/* Draw background layer */
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for (int tile_column = 0; tile_column < 32; tile_column++)
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{
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const u8 name = space().read_byte(name_table_base + tile_column);
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const u8 name = space().read_byte(name_row_base + tile_column);
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const u8 pattern = space().read_byte(pattern_base + (((pattern_offset + name) & pattern_mask) * 8) + (line & 0x07) );
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const u8 colors = space().read_byte(color_base + (((pattern_offset + name) & color_mask) * 8) + (line & 0x07) );
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@ -1550,14 +1626,15 @@ void sega315_5124_device::draw_scanline_mode2(int *line_buffer, int line)
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// Display mode 0 (Graphics I Mode)
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void sega315_5124_device::draw_scanline_mode0(int *line_buffer, int line)
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{
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const u16 name_base = ((m_reg[0x02] & 0x0f) << 10) + ((line >> 3) * 32);
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const u16 name_base = ((m_reg[0x02] & 0x0f) << 10);
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const u16 color_base = ((m_reg[0x03] << 6) & (VRAM_SIZE - 1));
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const u16 pattern_base = ((m_reg[0x04] << 11) & (VRAM_SIZE - 1));
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const u16 name_row_base = name_base + ((line >> 3) * 32);
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/* Draw background layer */
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for (int tile_column = 0; tile_column < 32; tile_column++)
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{
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const u8 name = space().read_byte(name_base + tile_column);
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const u8 name = space().read_byte(name_row_base + tile_column);
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||||
const u8 pattern = space().read_byte(pattern_base + (name << 3) + (line & 0x07));
|
||||
const u8 colors = space().read_byte(color_base + (name >> 3));
|
||||
|
||||
@ -1584,8 +1661,9 @@ void sega315_5124_device::draw_scanline_mode0(int *line_buffer, int line)
|
||||
// Display mode 1 (Text Mode)
|
||||
void sega315_5124_device::draw_scanline_mode1(int *line_buffer, int line)
|
||||
{
|
||||
const u16 name_base = ((m_reg[0x02] & 0x0f) << 10) + ((line >> 3) * 32);
|
||||
const u16 name_base = ((m_reg[0x02] & 0x0f) << 10);
|
||||
const u16 pattern_base = ((m_reg[0x04] << 11) & (VRAM_SIZE - 1));
|
||||
const u16 name_row_base = name_base + ((line >> 3) * 32);
|
||||
|
||||
for (int pixel_plot_x = 0; pixel_plot_x < 8; pixel_plot_x++)
|
||||
{
|
||||
@ -1595,7 +1673,7 @@ void sega315_5124_device::draw_scanline_mode1(int *line_buffer, int line)
|
||||
/* Draw background layer */
|
||||
for (int tile_column = 0; tile_column < 40; tile_column++)
|
||||
{
|
||||
const u8 name = space().read_byte(name_base + tile_column);
|
||||
const u8 name = space().read_byte(name_row_base + tile_column);
|
||||
const u8 pattern = space().read_byte(pattern_base + (name << 3) + (line & 0x07));
|
||||
|
||||
for (int pixel_x = 0; pixel_x < 6; pixel_x++)
|
||||
@ -1624,13 +1702,14 @@ void sega315_5124_device::draw_scanline_mode1(int *line_buffer, int line)
|
||||
// Display mode 3 (Multicolor Mode)
|
||||
void sega315_5124_device::draw_scanline_mode3(int *line_buffer, int line)
|
||||
{
|
||||
const u16 name_base = ((m_reg[0x02] & 0x0f) << 10) + ((line >> 3) * 32);
|
||||
const u16 name_base = ((m_reg[0x02] & 0x0f) << 10);
|
||||
const u16 pattern_base = ((m_reg[0x04] << 11) & (VRAM_SIZE - 1));
|
||||
const u16 name_row_base = name_base + ((line >> 3) * 32);
|
||||
|
||||
/* Draw background layer */
|
||||
for (int tile_column = 0; tile_column < 32; tile_column++)
|
||||
{
|
||||
const u8 name = space().read_byte(name_base + tile_column);
|
||||
const u8 name = space().read_byte(name_row_base + tile_column);
|
||||
const u8 pattern = space().read_byte(pattern_base + (name << 3) + (((line >> 3) & 3) << 1) + ((line & 4) >> 2));
|
||||
|
||||
for (int pixel_x = 0; pixel_x < 8; pixel_x++)
|
||||
@ -1988,7 +2067,7 @@ void sega315_5124_device::device_start()
|
||||
//save_item(NAME(m_tmpbitmap));
|
||||
//save_item(NAME(m_y1_bitmap));
|
||||
save_item(NAME(m_draw_time));
|
||||
save_item(NAME(m_sprite_base));
|
||||
save_item(NAME(m_sprite_attribute_base));
|
||||
save_item(NAME(m_sprite_pattern_line));
|
||||
save_item(NAME(m_sprite_tile_selected));
|
||||
save_item(NAME(m_sprite_x));
|
||||
|
||||
@ -119,9 +119,11 @@ protected:
|
||||
virtual void draw_scanline(int pixel_offset_x, int pixel_plot_y, int line);
|
||||
virtual void blit_scanline(int *line_buffer, int *priority_selected, int pixel_offset_x, int pixel_plot_y, int line);
|
||||
virtual void draw_leftmost_pixels_mode4(int *line_buffer, int *priority_selected, int fine_x_scroll, int palette_selected, int tile_line);
|
||||
virtual u16 name_table_row_mode4(int row);
|
||||
virtual u16 sprite_attributes_addr_mode4(u16 base);
|
||||
virtual u8 sprite_tile_mask_mode4(u8 tile_number);
|
||||
virtual u16 name_row_mode4(u16 row);
|
||||
virtual u16 tile1_select_mode4(u16 tile_number);
|
||||
virtual u16 tile2_select_mode4(u16 tile_number);
|
||||
virtual u8 sprite_attribute_extra_offset_mode4(u8 offset);
|
||||
virtual u8 sprite_tile_select_mode4(u8 tile_number);
|
||||
void process_line_timer();
|
||||
void draw_scanline_mode4(int *line_buffer, int *priority_selected, int line);
|
||||
void draw_sprites_mode4(int *line_buffer, int *priority_selected, int line);
|
||||
@ -131,6 +133,8 @@ protected:
|
||||
void draw_scanline_mode1(int *line_buffer, int line);
|
||||
void draw_scanline_mode0(int *line_buffer, int line);
|
||||
void check_pending_flags();
|
||||
u8 vcount();
|
||||
u8 hcount();
|
||||
|
||||
unsigned m_hcounter_divide;
|
||||
u8 m_reg[16]; /* All the registers */
|
||||
@ -167,7 +171,7 @@ protected:
|
||||
const u8 m_palette_offset;
|
||||
const u8 m_reg_num_mask;
|
||||
bool m_display_disabled;
|
||||
u16 m_sprite_base;
|
||||
u16 m_sprite_attribute_base;
|
||||
u16 m_sprite_pattern_line[8];
|
||||
int m_sprite_tile_selected[8];
|
||||
int m_sprite_x[8];
|
||||
@ -219,9 +223,11 @@ protected:
|
||||
|
||||
virtual void device_add_mconfig(machine_config &config) override;
|
||||
|
||||
virtual u16 name_table_row_mode4(int row) override;
|
||||
virtual u16 sprite_attributes_addr_mode4(u16 base) override;
|
||||
virtual u8 sprite_tile_mask_mode4(u8 tile_number) override;
|
||||
virtual u16 name_row_mode4(u16 row) override;
|
||||
virtual u16 tile1_select_mode4(u16 tile_number) override;
|
||||
virtual u16 tile2_select_mode4(u16 tile_number) override;
|
||||
virtual u8 sprite_attribute_extra_offset_mode4(u8 offset) override;
|
||||
virtual u8 sprite_tile_select_mode4(u8 tile_number) override;
|
||||
virtual void select_extended_res_mode4(bool M1, bool M2, bool M3) override;
|
||||
|
||||
private:
|
||||
|
||||
Loading…
Reference in New Issue
Block a user