Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-07-05 09:57:47 +03:00
Code Issues Actions 33 Packages Projects Releases Wiki Activity

mv_sonora: Support machines with a 32-bit wide bus. [R. Belmont]

Browse Source
This commit is contained in:
arbee 2022-07-08 19:29:33 -04:00
parent 8d28264487
commit 1fb65766df
2 changed files with 105 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

129
src/devices/machine/mv_sonora.cpp
View File

@ -25,7 +25,8 @@ mac_video_sonora_device::mac_video_sonora_device(const machine_config &mconfig,
m_screen(*this, "screen"),
m_palette(*this, "palette"),
m_monitor_config(*this, "monitor"),
m_screen_vblank(*this)
m_screen_vblank(*this),
m_is32bit(false)
{
}
@ -47,7 +48,7 @@ void mac_video_sonora_device::device_reset()
m_modeline_id = -1;
m_mode = 0x9f;
m_depth = 0;
m_monitor_id = 0;
m_monitor_id = 8;
m_vtest = 0;
m_vram_offset = 0;
}
@ -108,34 +109,110 @@ uint32_t mac_video_sonora_device::screen_update(screen_device &screen, bitmap_rg
uint32_t hres = m.htot - m.hfp - m.hs - m.hbp;
uint32_t vres = m.vtot - m.vfp - m.vs - m.vbp;
const uint64_t *vram = m_vram + (m_vram_offset / 8);
const pen_t *pens = m_palette->pens();
switch(m_depth) {
case 0: // 1bpp
for(uint32_t y = 0; y != vres; y++) {
uint32_t *scanline = &bitmap.pix(y);
for(uint32_t x = 0; x != hres; x += 64) {
uint64_t pixels = *vram ++;
for(int32_t bit = 63; bit >= 0; bit --)
*scanline ++ = pens[(((pixels >> bit) & 1) << 7) | 0x7f];
}
}
break;
case 3: // 8bpp
for(uint32_t y = 0; y != vres; y++) {
uint32_t *scanline = &bitmap.pix(y);
for(uint32_t x = 0; x != hres; x += 8) {
uint64_t pixels = *vram ++;
for(int32_t bit = 56; bit >= 0; bit -= 8)
*scanline ++ = pens[((pixels >> bit) & 0xff)];
if (m_is32bit) {
const uint32_t *vram = (uint32_t *)(m_vram + (m_vram_offset / 8));
switch (m_depth)
{
case 0: // 1bpp
for (uint32_t y = 0; y != vres; y++)
{
uint32_t *scanline = &bitmap.pix(y);
for (uint32_t x = 0; x != hres; x += 32)
{
uint32_t pixels = *vram++;
for (int32_t bit = 31; bit >= 0; bit--)
*scanline++ = pens[(((pixels >> bit) & 1) << 7) | 0x7f];
}
}
}
break;
break;
default:
bitmap.fill(0xff0000);
break;
case 1: // 2bpp
for (uint32_t y = 0; y != vres; y++)
{
uint32_t *scanline = &bitmap.pix(y);
for (uint32_t x = 0; x != hres; x += 16)
{
uint32_t pixels = *vram++;
for (int32_t bit = 30; bit >= 0; bit -= 2)
*scanline++ = pens[(((pixels >> bit) & 0x3)<<6) | 0x3f];
}
}
break;
case 2: // 4bpp
for (uint32_t y = 0; y != vres; y++)
{
uint32_t *scanline = &bitmap.pix(y);
for (uint32_t x = 0; x != hres; x += 8)
{
uint32_t pixels = *vram++;
for (int32_t bit = 28; bit >= 0; bit -= 4)
*scanline++ = pens[(((pixels >> bit) & 0x0f)<<4) | 0x0f];
}
}
break;
case 3: // 8bpp
for (uint32_t y = 0; y != vres; y++)
{
uint32_t *scanline = &bitmap.pix(y);
for (uint32_t x = 0; x != hres; x += 4)
{
uint32_t pixels = *vram++;
for (int32_t bit = 24; bit >= 0; bit -= 8)
*scanline++ = pens[((pixels >> bit) & 0xff)];
}
}
break;
case 4: // 16bpp
for (uint32_t y = 0; y != vres; y++)
{
uint32_t *scanline = &bitmap.pix(y);
for (uint32_t x = 0; x != hres; x += 2)
{
const uint32_t pixels = *vram++;
*scanline++ = rgb_t(((pixels >> 26) & 0x1f) << 3, ((pixels >> 21) & 0x1f) << 3, ((pixels >> 16) & 0x1f) << 3);
*scanline++ = rgb_t(((pixels >> 10) & 0x1f) << 3, ((pixels >> 5) & 0x1f) << 3, (pixels & 0x1f) << 3);
}
}
break;
default:
bitmap.fill(0xff0000);
break;
}
} else {
const uint64_t *vram = m_vram + (m_vram_offset / 8);
switch(m_depth) {
case 0: // 1bpp
for(uint32_t y = 0; y != vres; y++) {
uint32_t *scanline = &bitmap.pix(y);
for(uint32_t x = 0; x != hres; x += 64) {
uint64_t pixels = *vram ++;
for(int32_t bit = 63; bit >= 0; bit --)
*scanline ++ = pens[(((pixels >> bit) & 1) << 7) | 0x7f];
}
}
break;
case 3: // 8bpp
for(uint32_t y = 0; y != vres; y++) {
uint32_t *scanline = &bitmap.pix(y);
for(uint32_t x = 0; x != hres; x += 8) {
uint64_t pixels = *vram ++;
for(int32_t bit = 56; bit >= 0; bit -= 8)
*scanline ++ = pens[((pixels >> bit) & 0xff)];
}
}
break;
default:
bitmap.fill(0xff0000);
break;
}
}
return 0;

2
src/devices/machine/mv_sonora.h
View File

@ -32,6 +32,7 @@ public:
void set_vram_base(const uint64_t *vram) { m_vram = vram; }
void set_vram_offset(uint32_t offset) { m_vram_offset = offset; }
void set_32bit() { m_is32bit = true; }
protected:
virtual void device_start() override;
@ -61,6 +62,7 @@ private:
uint8_t m_mode, m_depth, m_monitor_id, m_vtest;
uint8_t m_pal_address, m_pal_idx, m_pal_control, m_pal_colkey;
int m_modeline_id;
bool m_is32bit;
uint32_t screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
};