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ims_cvc: hack for host/guest endianness mismatch (nw)

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This commit is contained in:
Patrick Mackinlay 2020-01-28 17:22:28 +07:00
parent 5710f7f5a8
commit 63fd509d7e
2 changed files with 12 additions and 5 deletions
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12
src/devices/video/ims_cvc.cpp
View File

@ -154,6 +154,8 @@ void ims_cvc_device::device_start()
save_item(NAME(m_mask));
save_item(NAME(m_tos));
save_item(NAME(m_boot));
save_item(NAME(m_swap));
}
void ims_cvc_device::device_reset()
@ -194,7 +196,7 @@ u32 g300_device::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, rect
for (int y = screen.visible_area().min_y; y <= screen.visible_area().max_y; y++)
for (int x = screen.visible_area().min_x; x <= screen.visible_area().max_x; x++)
bitmap.pix(y, x) = pen_color(m_vram->read(address++) & m_mask);
bitmap.pix(y, x) = pen_color(m_vram->read(address++ ^ m_swap) & m_mask);
return 0;
}
@ -209,7 +211,7 @@ u32 g332_device::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, rect
for (int y = screen.visible_area().min_y; y <= screen.visible_area().max_y; y++)
for (int x = screen.visible_area().min_x; x <= screen.visible_area().max_x; x += 8)
{
u8 pixel_data = m_vram->read(address++);
u8 pixel_data = m_vram->read(address++ ^ m_swap);
bitmap.pix(y, x + 0) = pen_color(pixel_data & 0x1 & m_mask); pixel_data >>= 1;
bitmap.pix(y, x + 1) = pen_color(pixel_data & 0x1 & m_mask); pixel_data >>= 1;
@ -226,7 +228,7 @@ u32 g332_device::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, rect
for (int y = screen.visible_area().min_y; y <= screen.visible_area().max_y; y++)
for (int x = screen.visible_area().min_x; x <= screen.visible_area().max_x; x += 4)
{
u8 pixel_data = m_vram->read(address++);
u8 pixel_data = m_vram->read(address++ ^ m_swap);
bitmap.pix(y, x + 0) = pen_color(pixel_data & 0x3 & m_mask); pixel_data >>= 2;
bitmap.pix(y, x + 1) = pen_color(pixel_data & 0x3 & m_mask); pixel_data >>= 2;
@ -239,7 +241,7 @@ u32 g332_device::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, rect
for (int y = screen.visible_area().min_y; y <= screen.visible_area().max_y; y++)
for (int x = screen.visible_area().min_x; x <= screen.visible_area().max_x; x += 2)
{
u8 pixel_data = m_vram->read(address++);
u8 pixel_data = m_vram->read(address++ ^ m_swap);
bitmap.pix(y, x + 0) = pen_color(pixel_data & 0xf & m_mask); pixel_data >>= 4;
bitmap.pix(y, x + 1) = pen_color(pixel_data & 0xf & m_mask);
@ -249,7 +251,7 @@ u32 g332_device::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, rect
case BPP_8:
for (int y = screen.visible_area().min_y; y <= screen.visible_area().max_y; y++)
for (int x = screen.visible_area().min_x; x <= screen.visible_area().max_x; x++)
bitmap.pix(y, x) = pen_color(m_vram->read(address++) & m_mask);
bitmap.pix(y, x) = pen_color(m_vram->read(address++ ^ m_swap) & m_mask);
break;
}

5
src/devices/video/ims_cvc.h
View File

@ -21,6 +21,7 @@ public:
virtual void map(address_map &map) = 0;
virtual u32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, rectangle const &cliprect) = 0;
virtual void set_swapped(bool swapped) { m_swap = swapped ? 3 : 0; };
protected:
ims_cvc_device(machine_config const &mconfig, device_type type, char const *tag, device_t *owner, u32 clock);
@ -88,6 +89,8 @@ protected:
u32 m_mask;
u32 m_tos;
u32 m_boot;
unsigned m_swap = 0;
};
class g300_device : public ims_cvc_device
@ -218,6 +221,8 @@ class g364_device : public g332_device
{
public:
g364_device(machine_config const &mconfig, char const *tag, device_t *owner, u32 clock);
virtual void set_swapped(bool swapped) override { m_swap = swapped ? 7 : 0; };
};
DECLARE_DEVICE_TYPE(G300, g300_device)