// license:BSD-3-Clause
// copyright-holders:Ryan Holtz
/*****************************************************************************
SunPlus SPG2xx-series SoC peripheral emulation (Video)
**********************************************************************/
#include "emu.h"
#include "spg2xx_video.h"
DEFINE_DEVICE_TYPE(SPG24X_VIDEO, spg24x_video_device, "spg24x_video", "SPG240-series System-on-a-Chip (Video)")
#define LOG_IRQS (1U << 4)
#define LOG_VLINES (1U << 5)
#define LOG_DMA (1U << 9)
#define LOG_PPU_READS (1U << 22)
#define LOG_PPU_WRITES (1U << 23)
#define LOG_UNKNOWN_PPU (1U << 24)
#define LOG_PPU (LOG_PPU_READS | LOG_PPU_WRITES | LOG_UNKNOWN_PPU)
#define LOG_ALL (LOG_IRQS | LOG_PPU | LOG_VLINES | LOG_DMA )
#define VERBOSE (0)
#include "logmacro.h"
#define SPG_DEBUG_VIDEO (0)
#define VIDEO_IRQ_ENABLE m_video_regs[0x62]
#define VIDEO_IRQ_STATUS m_video_regs[0x63]
spg2xx_video_device::spg2xx_video_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, type, tag, owner, clock)
, m_sprlimit_read_cb(*this)
, m_rowscrolloffset_read_cb(*this)
, m_cpu(*this, finder_base::DUMMY_TAG)
, m_screen(*this, finder_base::DUMMY_TAG)
, m_scrollram(*this, "scrollram")
, m_paletteram(*this, "paletteram")
, m_spriteram(*this, "spriteram")
, m_video_irq_cb(*this)
{
}
spg24x_video_device::spg24x_video_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: spg2xx_video_device(mconfig, SPG24X_VIDEO, tag, owner, clock)
{
}
void spg2xx_video_device::device_start()
{
for (uint8_t i = 0; i < 32; i++)
{
m_rgb5_to_rgb8[i] = (i << 3) | (i >> 2);
}
for (uint16_t i = 0; i < 0x8000; i++)
{
m_rgb555_to_rgb888[i] = (m_rgb5_to_rgb8[(i >> 10) & 0x1f] << 16) |
(m_rgb5_to_rgb8[(i >> 5) & 0x1f] << 8) |
(m_rgb5_to_rgb8[(i >> 0) & 0x1f] << 0);
}
m_screenpos_timer = timer_alloc(TIMER_SCREENPOS);
m_screenpos_timer->adjust(attotime::never);
save_item(NAME(m_hide_page0));
save_item(NAME(m_hide_page1));
save_item(NAME(m_hide_sprites));
save_item(NAME(m_debug_sprites));
save_item(NAME(m_debug_blit));
save_item(NAME(m_debug_palette));
save_item(NAME(m_sprite_index_to_debug));
save_item(NAME(m_video_regs));
m_sprlimit_read_cb.resolve_safe(0);
m_rowscrolloffset_read_cb.resolve_safe(0);
m_video_irq_cb.resolve();
}
void spg2xx_video_device::device_reset()
{
memset(m_video_regs, 0, 0x100 * sizeof(uint16_t));
m_video_regs[0x36] = 0xffff;
m_video_regs[0x37] = 0xffff;
m_video_regs[0x3c] = 0x0020;
m_video_regs[0x42] = 0x0001;
m_hide_page0 = false;
m_hide_page1 = false;
m_hide_sprites = false;
m_debug_sprites = false;
m_debug_blit = false;
m_debug_palette = false;
m_sprite_index_to_debug = 0;
}
/*************************
* Video Hardware *
*************************/
// Perform a lerp between a and b
inline uint8_t spg2xx_video_device::mix_channel(uint8_t bottom, uint8_t top)
{
uint8_t alpha = (m_video_regs[0x2a] & 3) << 6;
return ((256 - alpha) * bottom + alpha * top) >> 8;
}
template<spg2xx_video_device::blend_enable_t Blend, spg2xx_video_device::rowscroll_enable_t RowScroll, spg2xx_video_device::flipx_t FlipX>
void spg2xx_video_device::draw(const rectangle &cliprect, uint32_t line, uint32_t xoff, uint32_t yoff, uint32_t bitmap_addr, uint16_t tile, int32_t h, int32_t w, uint8_t bpp, uint32_t yflipmask, uint32_t palette_offset)
{
address_space &space = m_cpu->space(AS_PROGRAM);
uint32_t nc_bpp = ((bpp) + 1) << 1;
if (SPG_DEBUG_VIDEO && m_debug_blit)
{
printf("s:%d line:%d xy:%08x,%08x bitmap_addr:%08x tile:%04x\n", cliprect.min_x, line, xoff, yoff, bitmap_addr, tile);
printf("hw:%d,%d yfm:%d nc_bppols:%d pobs:%02x ", w, h, yflipmask, nc_bpp, palette_offset);
}
palette_offset >>= nc_bpp;
palette_offset <<= nc_bpp;
if (SPG_DEBUG_VIDEO && m_debug_blit)
{
printf("poas:%02x\n", palette_offset);
}
uint32_t bits_per_row = nc_bpp * w / 16;
uint32_t words_per_tile = bits_per_row * h;
uint32_t m = bitmap_addr + words_per_tile * tile + bits_per_row * (line ^ yflipmask);
uint32_t bits = 0;
uint32_t nbits = 0;
uint32_t y = line;
int yy = (yoff + y) & 0x1ff;
if (yy >= 0x01c0)
yy -= 0x0200;
if (yy > 240 || yy < 0)
return;
if (SPG_DEBUG_VIDEO && m_debug_blit)
printf("%3d:\n", yy);
int y_index = yy * 320;
for (int32_t x = FlipX ? (w - 1) : 0; FlipX ? x >= 0 : x < w; FlipX ? x-- : x++)
{
int xx = xoff + x;
bits <<= nc_bpp;
if (SPG_DEBUG_VIDEO && m_debug_blit)
printf(" %08x:%d ", bits, nbits);
if (nbits < nc_bpp)
{
uint16_t b = space.read_word(m++ & 0x3fffff);
b = (b << 8) | (b >> 8);
bits |= b << (nc_bpp - nbits);
nbits += 16;
if (SPG_DEBUG_VIDEO && m_debug_blit)
printf("(%04x:%08x:%d) ", b, bits, nbits);
}
nbits -= nc_bpp;
uint32_t pal = palette_offset + (bits >> 16);
if (SPG_DEBUG_VIDEO && m_debug_blit)
printf("%02x:%02x:%04x ", bits >> 16, pal, bits & 0xffff);
bits &= 0xffff;
if (RowScroll)
xx -= (int16_t)m_scrollram[(yy + m_rowscrolloffset_read_cb()) & 0x1ff];
xx &= 0x01ff;
if (xx >= 0x01c0)
xx -= 0x0200;
if (xx >= 0 && xx < 320)
{
int pix_index = xx + y_index;
uint16_t rgb = m_paletteram[pal];
if (SPG_DEBUG_VIDEO && m_debug_blit)
printf("rgb:%04x ", rgb);
if (!(rgb & 0x8000))
{
if (Blend)
{
if (SPG_DEBUG_VIDEO && m_debug_blit)
printf("M\n");
m_screenbuf[pix_index] = (mix_channel((uint8_t)(m_screenbuf[pix_index] >> 16), m_rgb5_to_rgb8[(rgb >> 10) & 0x1f]) << 16) |
(mix_channel((uint8_t)(m_screenbuf[pix_index] >> 8), m_rgb5_to_rgb8[(rgb >> 5) & 0x1f]) << 8) |
(mix_channel((uint8_t)(m_screenbuf[pix_index] >> 0), m_rgb5_to_rgb8[rgb & 0x1f]));
}
else
{
if (SPG_DEBUG_VIDEO && m_debug_blit)
printf("S\n");
m_screenbuf[pix_index] = m_rgb555_to_rgb888[rgb];
}
}
else if (SPG_DEBUG_VIDEO && m_debug_blit)
{
printf("X\n");
}
}
}
}
void spg2xx_video_device::draw_bitmap(const rectangle& cliprect, uint32_t scanline, int priority, uint32_t bitmap_addr, uint16_t* regs)
{
if ((scanline < 0) || (scanline >= 240))
return;
address_space& space = m_cpu->space(AS_PROGRAM);
const int linewidth = 320 / 2;
int sourcebase = 0x3f0000; // this is correct for Texas Hold'em - TODO: get from a register?
sourcebase++; // why is this needed?
int bitmapline = scanline - 20; // should be from scrolly?
// at least for Texas Hold'em there is only enough memory for this size bitmap, and other reads would be outside of memory and generate excessive logging
// maybe we just need to silence logging instead tho?
if ((bitmapline < 0) || (bitmapline >= 200))
return;
sourcebase += bitmapline * linewidth;
uint32_t* dest = &m_screenbuf[320 * scanline];
for (int i = 0; i < 320 / 2; i++)
{
uint8_t palette_entry;
uint16_t color;
const uint16_t data = space.read_word(sourcebase + i);
palette_entry = (data & 0x00ff);
color = m_paletteram[palette_entry];
if (!(color & 0x8000))
{
dest[(i * 2)+0] = m_rgb555_to_rgb888[color & 0x7fff];
}
palette_entry = (data & 0xff00) >> 8;
color = m_paletteram[palette_entry];
if (!(color & 0x8000))
{
dest[(i * 2)+1] = m_rgb555_to_rgb888[color & 0x7fff];
}
}
}
void spg2xx_video_device::draw_page(const rectangle &cliprect, uint32_t scanline, int priority, uint32_t bitmap_addr, uint16_t *regs)
{
uint32_t xscroll = regs[0];
uint32_t yscroll = regs[1];
uint32_t attr = regs[2];
uint32_t ctrl = regs[3];
uint32_t tilemap = regs[4];
uint32_t palette_map = regs[5];
address_space &space = m_cpu->space(AS_PROGRAM);
if (!(ctrl & PAGE_ENABLE_MASK))
{
return;
}
if (((attr & PAGE_PRIORITY_FLAG_MASK) >> PAGE_PRIORITY_FLAG_SHIFT) != priority)
{
return;
}
if (ctrl & 0x0001) // Bitmap mode!
{
draw_bitmap(cliprect, scanline, priority, bitmap_addr, regs);
return;
}
uint32_t tile_h = 8 << ((attr & PAGE_TILE_HEIGHT_MASK) >> PAGE_TILE_HEIGHT_SHIFT);
uint32_t tile_w = 8 << ((attr & PAGE_TILE_WIDTH_MASK) >> PAGE_TILE_WIDTH_SHIFT);
uint32_t tile_count_x = 512 / tile_w;
uint32_t bitmap_y = (scanline + yscroll) & 0xff;
uint32_t y0 = bitmap_y / tile_h;
uint32_t tile_scanline = bitmap_y % tile_h;
uint32_t tile_address = tile_count_x * y0;
if (SPG_DEBUG_VIDEO && machine().input().code_pressed(KEYCODE_H))
printf("s:%3d | baddr:%08x | yscr:%3d | bity:%3d | y0:%2d | ts:%2d\n", scanline, bitmap_addr, yscroll, bitmap_y, y0, tile_scanline);
if (SPG_DEBUG_VIDEO && machine().input().code_pressed(KEYCODE_EQUALS))
m_debug_blit = true;
for (uint32_t x0 = 0; x0 < tile_count_x; x0++, tile_address++)
{
uint32_t yy = ((tile_h * y0 - yscroll + 0x10) & 0xff) - 0x10;
uint32_t xx = (tile_w * x0 - xscroll) & 0x1ff;
uint16_t tile = (ctrl & PAGE_WALLPAPER_MASK) ? space.read_word(tilemap) : space.read_word(tilemap + tile_address);
uint16_t palette = 0;
if (!tile)
continue;
palette = (ctrl & PAGE_WALLPAPER_MASK) ? space.read_word(palette_map) : space.read_word(palette_map + tile_address / 2);
if (x0 & 1)
palette >>= 8;
uint32_t tileattr = attr;
uint32_t tilectrl = ctrl;
if ((ctrl & 2) == 0)
{ // -(1) bld(1) flip(2) pal(4)
tileattr &= ~0x000c;
tileattr |= (palette >> 2) & 0x000c; // flip
tileattr &= ~0x0f00;
tileattr |= (palette << 8) & 0x0f00; // palette
tilectrl &= ~0x0100;
tilectrl |= (palette << 2) & 0x0100; // blend
}
const bool blend = (tileattr & 0x4000 || tilectrl & 0x0100);
const bool row_scroll = (tilectrl & 0x0010);
const bool flip_x = (tileattr & TILE_X_FLIP);
const uint32_t yflipmask = tileattr & TILE_Y_FLIP ? tile_h - 1 : 0;
const uint32_t palette_offset = (tileattr & 0x0f00) >> 4;
const uint8_t bpp = tileattr & 0x0003;
if (blend)
{
if (row_scroll)
{
if (flip_x)
draw<BlendOn, RowScrollOn, FlipXOn>(cliprect, tile_scanline, xx, yy, bitmap_addr, tile, tile_h, tile_w, bpp, yflipmask, palette_offset);
else
draw<BlendOn, RowScrollOn, FlipXOff>(cliprect, tile_scanline, xx, yy, bitmap_addr, tile, tile_h, tile_w, bpp, yflipmask, palette_offset);
}
else
{
if (flip_x)
draw<BlendOn, RowScrollOff, FlipXOn>(cliprect, tile_scanline, xx, yy, bitmap_addr, tile, tile_h, tile_w, bpp, yflipmask, palette_offset);
else
draw<BlendOn, RowScrollOff, FlipXOff>(cliprect, tile_scanline, xx, yy, bitmap_addr, tile, tile_h, tile_w, bpp, yflipmask, palette_offset);
}
}
else
{
if (row_scroll)
{
if (flip_x)
draw<BlendOff, RowScrollOn, FlipXOn>(cliprect, tile_scanline, xx, yy, bitmap_addr, tile, tile_h, tile_w, bpp, yflipmask, palette_offset);
else
draw<BlendOff, RowScrollOn, FlipXOff>(cliprect, tile_scanline, xx, yy, bitmap_addr, tile, tile_h, tile_w, bpp, yflipmask, palette_offset);
}
else
{
if (flip_x)
draw<BlendOff, RowScrollOff, FlipXOn>(cliprect, tile_scanline, xx, yy, bitmap_addr, tile, tile_h, tile_w, bpp, yflipmask, palette_offset);
else
draw<BlendOff, RowScrollOff, FlipXOff>(cliprect, tile_scanline, xx, yy, bitmap_addr, tile, tile_h, tile_w, bpp, yflipmask, palette_offset);
}
}
}
if (SPG_DEBUG_VIDEO && machine().input().code_pressed(KEYCODE_EQUALS))
m_debug_blit = false;
}
void spg2xx_video_device::draw_sprite(const rectangle &cliprect, uint32_t scanline, int priority, uint32_t base_addr)
{
uint32_t bitmap_addr = 0x40 * m_video_regs[0x22];
uint16_t tile = m_spriteram[base_addr + 0];
int16_t x = m_spriteram[base_addr + 1];
int16_t y = m_spriteram[base_addr + 2];
uint16_t attr = m_spriteram[base_addr + 3];
if (!tile)
{
return;
}
if (((attr & PAGE_PRIORITY_FLAG_MASK) >> PAGE_PRIORITY_FLAG_SHIFT) != priority)
{
return;
}
const uint32_t h = 8 << ((attr & PAGE_TILE_HEIGHT_MASK) >> PAGE_TILE_HEIGHT_SHIFT);
const uint32_t w = 8 << ((attr & PAGE_TILE_WIDTH_MASK) >> PAGE_TILE_WIDTH_SHIFT);
if (!(m_video_regs[0x42] & SPRITE_COORD_TL_MASK))
{
x = (160 + x) - w / 2;
y = (120 - y) - (h / 2) + 8;
}
x &= 0x01ff;
y &= 0x01ff;
uint32_t tile_line = ((scanline - y) + 0x200) % h;
int16_t test_y = (y + tile_line) & 0x1ff;
if (test_y >= 0x01c0)
test_y -= 0x0200;
if (test_y != scanline)
{
return;
}
bool blend = (attr & 0x4000);
bool flip_x = (attr & TILE_X_FLIP);
const uint8_t bpp = attr & 0x0003;
const uint32_t yflipmask = attr & TILE_Y_FLIP ? h - 1 : 0;
const uint32_t palette_offset = (attr & 0x0f00) >> 4;
#if SPG_DEBUG_VIDEO
if (m_debug_sprites && machine().input().code_pressed(KEYCODE_MINUS))
m_debug_blit = true;
if (blend)
{
if (flip_x)
draw<BlendOn, RowScrollOff, FlipXOn>(cliprect, tile_line, x, y, bitmap_addr, tile, h, w, bpp, yflipmask, palette_offset);
else
draw<BlendOn, RowScrollOff, FlipXOff>(cliprect, tile_line, x, y, bitmap_addr, tile, h, w, bpp, yflipmask, palette_offset);
}
else
{
if (flip_x)
draw<BlendOff, RowScrollOff, FlipXOn>(cliprect, tile_line, x, y, bitmap_addr, tile, h, w, bpp, yflipmask, palette_offset);
else
draw<BlendOff, RowScrollOff, FlipXOff>(cliprect, tile_line, x, y, bitmap_addr, tile, h, w, bpp, yflipmask, palette_offset);
}
m_debug_blit = false;
#else
if (blend)
{
if (flip_x)
draw<BlendOn, RowScrollOff, FlipXOn>(cliprect, tile_line, x, y, bitmap_addr, tile, h, w, bpp, yflipmask, palette_offset);
else
draw<BlendOn, RowScrollOff, FlipXOff>(cliprect, tile_line, x, y, bitmap_addr, tile, h, w, bpp, yflipmask, palette_offset);
}
else
{
if (flip_x)
draw<BlendOff, RowScrollOff, FlipXOn>(cliprect, tile_line, x, y, bitmap_addr, tile, h, w, bpp, yflipmask, palette_offset);
else
draw<BlendOff, RowScrollOff, FlipXOff>(cliprect, tile_line, x, y, bitmap_addr, tile, h, w, bpp, yflipmask, palette_offset);
}
#endif
}
void spg2xx_video_device::draw_sprites(const rectangle &cliprect, uint32_t scanline, int priority)
{
if (!(m_video_regs[0x42] & SPRITE_ENABLE_MASK))
{
return;
}
#if SPG_DEBUG_VIDEO
if (!m_debug_sprites)
{
#endif
for (uint32_t n = 0; n < m_sprlimit_read_cb(); n++)
{
draw_sprite(cliprect, scanline, priority, 4 * n);
}
#if SPG_DEBUG_VIDEO
}
else
{
draw_sprite(cliprect, scanline, priority, 4 * m_sprite_index_to_debug);
}
#endif
}
void spg2xx_video_device::apply_saturation(const rectangle &cliprect)
{
static const float s_u8_to_float = 1.0f / 255.0f;
static const float s_gray_r = 0.299f;
static const float s_gray_g = 0.587f;
static const float s_gray_b = 0.114f;
const float sat_adjust = (0xff - (m_video_regs[0x3c] & 0x00ff)) / (float)(0xff - 0x20);
for (int y = cliprect.min_y; y <= cliprect.max_y; y++)
{
uint32_t *src = &m_screenbuf[cliprect.min_x + 320 * y];
for (int x = cliprect.min_x; x <= cliprect.max_x; x++)
{
const uint32_t src_rgb = *src;
const float src_r = (uint8_t)(src_rgb >> 16) * s_u8_to_float;
const float src_g = (uint8_t)(src_rgb >> 8) * s_u8_to_float;
const float src_b = (uint8_t)(src_rgb >> 0) * s_u8_to_float;
const float luma = src_r * s_gray_r + src_g * s_gray_g + src_b * s_gray_b;
const float adjusted_r = luma + (src_r - luma) * sat_adjust;
const float adjusted_g = luma + (src_g - luma) * sat_adjust;
const float adjusted_b = luma + (src_b - luma) * sat_adjust;
const int integer_r = (int)floor(adjusted_r * 255.0f);
const int integer_g = (int)floor(adjusted_g * 255.0f);
const int integer_b = (int)floor(adjusted_b * 255.0f);
*src++ = (integer_r > 255 ? 0xff0000 : (integer_r < 0 ? 0 : ((uint8_t)integer_r << 16))) |
(integer_g > 255 ? 0x00ff00 : (integer_g < 0 ? 0 : ((uint8_t)integer_g << 8))) |
(integer_b > 255 ? 0x0000ff : (integer_b < 0 ? 0 : (uint8_t)integer_b));
}
}
}
void spg2xx_video_device::apply_fade(const rectangle &cliprect)
{
const uint16_t fade_offset = m_video_regs[0x30];
for (int y = cliprect.min_y; y <= cliprect.max_y; y++)
{
uint32_t *src = &m_screenbuf[cliprect.min_x + 320 * y];
for (int x = cliprect.min_x; x <= cliprect.max_x; x++)
{
const uint32_t src_rgb = *src;
const uint8_t src_r = (src_rgb >> 16) & 0xff;
const uint8_t src_g = (src_rgb >> 8) & 0xff;
const uint8_t src_b = (src_rgb >> 0) & 0xff;
const uint8_t r = src_r - fade_offset;
const uint8_t g = src_g - fade_offset;
const uint8_t b = src_b - fade_offset;
*src++ = (r > src_r ? 0 : (r << 16)) |
(g > src_g ? 0 : (g << 8)) |
(b > src_b ? 0 : (b << 0));
}
}
}
uint32_t spg2xx_video_device::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
memset(&m_screenbuf[320 * cliprect.min_y], 0, 4 * 320 * ((cliprect.max_y - cliprect.min_y) + 1));
const uint32_t page1_addr = 0x40 * m_video_regs[0x20];
const uint32_t page2_addr = 0x40 * m_video_regs[0x21];
uint16_t *page1_regs = m_video_regs + 0x10;
uint16_t *page2_regs = m_video_regs + 0x16;
for (uint32_t scanline = (uint32_t)cliprect.min_y; scanline <= (uint32_t)cliprect.max_y; scanline++)
{
for (int i = 0; i < 4; i++)
{
if (!SPG_DEBUG_VIDEO || !m_hide_page0)
draw_page(cliprect, scanline, i, page1_addr, page1_regs);
if (!SPG_DEBUG_VIDEO || !m_hide_page1)
draw_page(cliprect, scanline, i, page2_addr, page2_regs);
if (!SPG_DEBUG_VIDEO || !m_hide_sprites)
draw_sprites(cliprect, scanline, i);
}
}
if ((m_video_regs[0x3c] & 0x00ff) != 0x0020)
{
apply_saturation(cliprect);
}
if (m_video_regs[0x30] != 0)
{
apply_fade(cliprect);
}
for (int y = cliprect.min_y; y <= cliprect.max_y; y++)
{
uint32_t *dest = &bitmap.pix32(y, cliprect.min_x);
uint32_t *src = &m_screenbuf[cliprect.min_x + 320 * y];
memcpy(dest, src, sizeof(uint32_t) * ((cliprect.max_x - cliprect.min_x) + 1));
}
if (SPG_DEBUG_VIDEO && m_debug_palette)
{
for (int y = cliprect.min_y; y <= cliprect.max_y && y < 128; y++)
{
const uint16_t high_nybble = (y / 8) << 4;
uint32_t *dest = &bitmap.pix32(y, cliprect.min_x);
for (int x = cliprect.min_x; x <= cliprect.max_x && x < 256; x++)
{
const uint16_t low_nybble = x / 16;
const uint16_t palette_entry = high_nybble | low_nybble;
const uint16_t color = m_paletteram[palette_entry];
if (!(color & 0x8000))
{
*dest = m_rgb555_to_rgb888[color & 0x7fff];
}
dest++;
}
}
}
return 0;
}
void spg2xx_video_device::do_sprite_dma(uint32_t len)
{
address_space &mem = m_cpu->space(AS_PROGRAM);
uint32_t src = m_video_regs[0x70] & 0x3fff;
uint32_t dst = m_video_regs[0x71];
for (uint32_t j = 0; j < len; j++)
{
m_spriteram[(dst + j) & 0x3ff] = mem.read_word(src + j);
}
m_video_regs[0x72] = 0;
if (VIDEO_IRQ_ENABLE & 4)
{
const uint16_t old = VIDEO_IRQ_STATUS;
VIDEO_IRQ_STATUS |= 4;
const uint16_t changed = old ^ (VIDEO_IRQ_ENABLE & VIDEO_IRQ_STATUS);
if (changed)
check_video_irq();
}
}
READ16_MEMBER(spg2xx_video_device::video_r)
{
switch (offset)
{
case 0x38: // Current Line
LOGMASKED(LOG_VLINES, "video_r: Current Line: %04x\n", m_screen->vpos());
return m_screen->vpos();
case 0x62: // Video IRQ Enable
LOGMASKED(LOG_IRQS, "video_r: Video IRQ Enable: %04x\n", VIDEO_IRQ_ENABLE);
return VIDEO_IRQ_ENABLE;
case 0x63: // Video IRQ Status
LOGMASKED(LOG_IRQS, "video_r: Video IRQ Status: %04x\n", VIDEO_IRQ_STATUS);
return VIDEO_IRQ_STATUS;
default:
LOGMASKED(LOG_UNKNOWN_PPU, "video_r: Unknown register %04x = %04x\n", 0x2800 + offset, m_video_regs[offset]);
break;
}
return m_video_regs[offset];
}
WRITE16_MEMBER(spg2xx_video_device::video_w)
{
switch (offset)
{
case 0x10: // Page 1 X scroll
LOGMASKED(LOG_PPU_WRITES, "video_w: Page 1 X Scroll = %04x\n", data & 0x01ff);
m_video_regs[offset] = data & 0x01ff;
break;
case 0x11: // Page 1 Y scroll
LOGMASKED(LOG_PPU_WRITES, "video_w: Page 1 Y Scroll = %04x\n", data & 0x00ff);
m_video_regs[offset] = data & 0x00ff;
break;
case 0x12: // Page 1 Attributes
LOGMASKED(LOG_PPU_WRITES, "video_w: Page 1 Attributes = %04x (Depth:%d, Palette:%d, VSize:%d, HSize:%d, FlipY:%d, FlipX:%d, BPP:%d)\n", data
, (data >> 12) & 3, (data >> 8) & 15, 8 << ((data >> 6) & 3), 8 << ((data >> 4) & 3), BIT(data, 3), BIT(data, 2), 2 * ((data & 3) + 1));
m_video_regs[offset] = data;
break;
case 0x13: // Page 1 Control
LOGMASKED(LOG_PPU_WRITES, "video_w: Page 1 Control = %04x (Blend:%d, HiColor:%d, RowScroll:%d, Enable:%d, Wallpaper:%d, RegSet:%d, Bitmap:%d)\n", data
, BIT(data, 8), BIT(data, 7), BIT(data, 4), BIT(data, 3), BIT(data, 2), BIT(data, 1), BIT(data, 0));
m_video_regs[offset] = data;
break;
case 0x14: // Page 1 Tile Address
LOGMASKED(LOG_PPU_WRITES, "video_w: Page 1 Tile Address = %04x\n", data & 0x1fff);
m_video_regs[offset] = data;
break;
case 0x15: // Page 1 Attribute Address
LOGMASKED(LOG_PPU_WRITES, "video_w: Page 1 Attribute Address = %04x\n", data & 0x1fff);
m_video_regs[offset] = data;
break;
case 0x16: // Page 2 X scroll
LOGMASKED(LOG_PPU_WRITES, "video_w: Page 2 X Scroll = %04x\n", data & 0x01ff);
m_video_regs[offset] = data & 0x01ff;
break;
case 0x17: // Page 2 Y scroll
LOGMASKED(LOG_PPU_WRITES, "video_w: Page 2 Y Scroll: %04x = %04x\n", 0x2800 | offset, data & 0x00ff);
m_video_regs[offset] = data & 0x00ff;
break;
case 0x18: // Page 2 Attributes
LOGMASKED(LOG_PPU_WRITES, "video_w: Page 2 Attributes = %04x (Depth:%d, Palette:%d, VSize:%d, HSize:%d, FlipY:%d, FlipX:%d, BPP:%d)\n", data
, (data >> 12) & 3, (data >> 8) & 15, 8 << ((data >> 6) & 3), 8 << ((data >> 4) & 3), BIT(data, 3), BIT(data, 2), 2 * ((data & 3) + 1));
m_video_regs[offset] = data;
break;
case 0x19: // Page 2 Control
LOGMASKED(LOG_PPU_WRITES, "video_w: Page 2 Control = %04x (Blend:%d, HiColor:%d, RowScroll:%d, Enable:%d, Wallpaper:%d, RegSet:%d, Bitmap:%d)\n", data
, BIT(data, 8), BIT(data, 7), BIT(data, 4), BIT(data, 3), BIT(data, 2), BIT(data, 1), BIT(data, 0));
m_video_regs[offset] = data;
break;
case 0x1a: // Page 2 Tile Address
LOGMASKED(LOG_PPU_WRITES, "video_w: Page 2 Tile Address = %04x\n", data & 0x1fff);
m_video_regs[offset] = data;
break;
case 0x1b: // Page 2 Attribute Address
LOGMASKED(LOG_PPU_WRITES, "video_w: Page 2 Attribute Address = %04x\n", data & 0x1fff);
m_video_regs[offset] = data;
break;
case 0x20: // Page 1 Segment Address
LOGMASKED(LOG_PPU_WRITES, "video_w: Page 1 Segment Address = %04x\n", data);
m_video_regs[offset] = data;
break;
case 0x21: // Page 2 Segment Address
LOGMASKED(LOG_PPU_WRITES, "video_w: Page 2 Segment Address = %04x\n", data);
m_video_regs[offset] = data;
break;
case 0x22: // Sprite Segment Address
LOGMASKED(LOG_PPU_WRITES, "video_w: Sprite Segment Address = %04x\n", data);
m_video_regs[offset] = data;
break;
case 0x2a: // Blend Level Control
LOGMASKED(LOG_PPU_WRITES, "video_w: Blend Level Control = %04x\n", data & 0x0003);
m_video_regs[offset] = data & 0x0003;
break;
case 0x30: // Fade Effect Control
LOGMASKED(LOG_PPU_WRITES, "video_w: Fade Effect Control = %04x\n", data & 0x00ff);
m_video_regs[offset] = data & 0x00ff;
break;
case 0x36: // IRQ pos V
case 0x37: // IRQ pos H
m_video_regs[offset] = data & 0x01ff;
LOGMASKED(LOG_IRQS, "video_w: Video IRQ Position: %04x,%04x (%04x)\n", m_video_regs[0x37], m_video_regs[0x36], 0x2800 | offset);
if (m_video_regs[0x37] < 160 && m_video_regs[0x36] < 240)
m_screenpos_timer->adjust(m_screen->time_until_pos(m_video_regs[0x36], m_video_regs[0x37] << 1));
else
m_screenpos_timer->adjust(attotime::never);
break;
case 0x39: // Latch 1st Line Pen Pulse
LOGMASKED(LOG_PPU_WRITES, "video_w: Latch 1st Line Pen Pulse = %04x\n", data & 0x0001);
m_video_regs[offset] = data & 0x0001;
break;
case 0x3c: // TV Control 1
LOGMASKED(LOG_PPU_WRITES, "video_w: TV Control 1 = %04x (Hue:%02x, Saturation:%02x)\n", data, data >> 8, data & 0x00ff);
m_video_regs[offset] = data;
break;
case 0x3d: // TV Control 2
{
static const char* const s_lpf_mode[4] = { "LPF1", "LPF2", "All", "Edge" };
LOGMASKED(LOG_PPU_WRITES, "video_w: TV Control 2 = %04x (LPFMode:%s, Enable:%d, Interlace:%d)\n", data & 0x000f
, s_lpf_mode[(data >> 2) & 3], BIT(data, 1), BIT(data, 0));
m_video_regs[offset] = data & 0x000f;
break;
}
case 0x3e: // Light Pen Y Position
LOGMASKED(LOG_PPU_WRITES, "video_w: Light Pen Y (read only) = %04x\n", data & 0x01ff);
break;
case 0x3f: // Light Pen YXPosition
LOGMASKED(LOG_PPU_WRITES, "video_w: Light Pen X (read only) = %04x\n", data & 0x01ff);
break;
case 0x42: // Sprite Control
LOGMASKED(LOG_PPU_WRITES, "video_w: Sprite Control = %04x (TopLeft:%d, Enable:%d)\n", data & 0x0003, BIT(data, 1), BIT(data, 0));
m_video_regs[offset] = data & 0x0003;
break;
case 0x62: // Video IRQ Enable
{
LOGMASKED(LOG_IRQS, "video_w: Video IRQ Enable = %04x (DMA:%d, Timing:%d, Blanking:%d)\n", data & 0x0007, BIT(data, 2), BIT(data, 1), BIT(data, 0));
const uint16_t old = VIDEO_IRQ_ENABLE & VIDEO_IRQ_STATUS;
VIDEO_IRQ_ENABLE = data & 0x0007;
const uint16_t changed = old ^ (VIDEO_IRQ_ENABLE & VIDEO_IRQ_STATUS);
if (changed)
check_video_irq();
break;
}
case 0x63: // Video IRQ Acknowledge
{
LOGMASKED(LOG_IRQS, "video_w: Video IRQ Acknowledge = %04x\n", data);
const uint16_t old = VIDEO_IRQ_ENABLE & VIDEO_IRQ_STATUS;
VIDEO_IRQ_STATUS &= ~data;
const uint16_t changed = old ^ (VIDEO_IRQ_ENABLE & VIDEO_IRQ_STATUS);
if (changed)
check_video_irq();
break;
}
case 0x70: // Sprite DMA Source
LOGMASKED(LOG_DMA, "video_w: Sprite DMA Source = %04x\n", data & 0x3fff);
m_video_regs[offset] = data & 0x3fff;
break;
case 0x71: // Sprite DMA Dest
LOGMASKED(LOG_DMA, "video_w: Sprite DMA Dest = %04x\n", data & 0x03ff);
m_video_regs[offset] = data & 0x03ff;
break;
case 0x72: // Sprite DMA Length
{
LOGMASKED(LOG_DMA, "video_w: Sprite DMA Length = %04x\n", data & 0x03ff);
uint16_t length = data & 0x3ff;
do_sprite_dma(length ? length : 0x400);
break;
}
default:
LOGMASKED(LOG_UNKNOWN_PPU, "video_w: Unknown register %04x = %04x\n", 0x2800 + offset, data);
m_video_regs[offset] = data;
break;
}
}
WRITE_LINE_MEMBER(spg2xx_video_device::vblank)
{
if (!state)
{
VIDEO_IRQ_STATUS &= ~1;
LOGMASKED(LOG_IRQS, "Setting video IRQ status to %04x\n", VIDEO_IRQ_STATUS);
check_video_irq();
return;
}
#if SPG_DEBUG_VIDEO
if (machine().input().code_pressed_once(KEYCODE_5))
m_hide_page0 = !m_hide_page0;
if (machine().input().code_pressed_once(KEYCODE_6))
m_hide_page1 = !m_hide_page1;
if (machine().input().code_pressed_once(KEYCODE_7))
m_hide_sprites = !m_hide_sprites;
if (machine().input().code_pressed_once(KEYCODE_8))
m_debug_sprites = !m_debug_sprites;
if (machine().input().code_pressed_once(KEYCODE_9))
m_sprite_index_to_debug--;
if (machine().input().code_pressed_once(KEYCODE_0))
m_sprite_index_to_debug++;
if (machine().input().code_pressed_once(KEYCODE_L))
m_debug_palette = !m_debug_palette;
#endif
if (VIDEO_IRQ_ENABLE & 1)
{
VIDEO_IRQ_STATUS |= 1;
LOGMASKED(LOG_IRQS, "Setting video IRQ status to %04x\n", VIDEO_IRQ_STATUS);
check_video_irq();
}
}
void spg2xx_video_device::check_video_irq()
{
LOGMASKED(LOG_IRQS, "%ssserting IRQ0 (%04x, %04x)\n", (VIDEO_IRQ_STATUS & VIDEO_IRQ_ENABLE) ? "A" : "Dea", VIDEO_IRQ_STATUS, VIDEO_IRQ_ENABLE);
m_video_irq_cb((VIDEO_IRQ_STATUS & VIDEO_IRQ_ENABLE) ? ASSERT_LINE : CLEAR_LINE);
}
void spg2xx_video_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
{
switch (id)
{
case TIMER_SCREENPOS:
{
if (VIDEO_IRQ_ENABLE & 2)
{
VIDEO_IRQ_STATUS |= 2;
check_video_irq();
}
m_screen->update_partial(m_screen->vpos());
// fire again, jak_dbz pinball needs this
m_screenpos_timer->adjust(m_screen->time_until_pos(m_video_regs[0x36], m_video_regs[0x37] << 1));
break;
}
}
}