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Diffstat (limited to 'src/devices/bus/nubus/nubus_specpdq.cpp')
-rw-r--r--src/devices/bus/nubus/nubus_specpdq.cpp40
1 files changed, 17 insertions, 23 deletions
diff --git a/src/devices/bus/nubus/nubus_specpdq.cpp b/src/devices/bus/nubus/nubus_specpdq.cpp
index 891defaa336..c00938c6102 100644
--- a/src/devices/bus/nubus/nubus_specpdq.cpp
+++ b/src/devices/bus/nubus/nubus_specpdq.cpp
@@ -157,22 +157,18 @@ void nubus_specpdq_device::device_timer(emu_timer &timer, device_timer_id tid, i
uint32_t nubus_specpdq_device::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
- uint32_t *scanline;
- int x, y;
- uint8_t pixels, *vram;
-
// first time? kick off the VBL timer
- vram = &m_vram[0x9000];
+ uint8_t const *const vram = &m_vram[0x9000];
switch (m_mode)
{
case 0: // 1 bpp
- for (y = 0; y < 844; y++)
+ for (int y = 0; y < 844; y++)
{
- scanline = &bitmap.pix32(y);
- for (x = 0; x < 1152/8; x++)
+ uint32_t *scanline = &bitmap.pix(y);
+ for (int x = 0; x < 1152/8; x++)
{
- pixels = vram[(y * 512) + (BYTE4_XOR_BE(x))];
+ uint8_t const pixels = vram[(y * 512) + (BYTE4_XOR_BE(x))];
*scanline++ = m_palette_val[(pixels&0x80)];
*scanline++ = m_palette_val[((pixels<<1)&0x80)];
@@ -187,12 +183,12 @@ uint32_t nubus_specpdq_device::screen_update(screen_device &screen, bitmap_rgb32
break;
case 1: // 2 bpp
- for (y = 0; y < 844; y++)
+ for (int y = 0; y < 844; y++)
{
- scanline = &bitmap.pix32(y);
- for (x = 0; x < 1152/4; x++)
+ uint32_t *scanline = &bitmap.pix(y);
+ for (int x = 0; x < 1152/4; x++)
{
- pixels = vram[(y * 512) + (BYTE4_XOR_BE(x))];
+ uint8_t const pixels = vram[(y * 512) + (BYTE4_XOR_BE(x))];
*scanline++ = m_palette_val[(pixels&0xc0)];
*scanline++ = m_palette_val[((pixels<<2)&0xc0)];
@@ -203,13 +199,12 @@ uint32_t nubus_specpdq_device::screen_update(screen_device &screen, bitmap_rgb32
break;
case 2: // 4 bpp
- for (y = 0; y < 844; y++)
+ for (int y = 0; y < 844; y++)
{
- scanline = &bitmap.pix32(y);
-
- for (x = 0; x < 1152/2; x++)
+ uint32_t *scanline = &bitmap.pix(y);
+ for (int x = 0; x < 1152/2; x++)
{
- pixels = vram[(y * 1024) + (BYTE4_XOR_BE(x))];
+ uint8_t const pixels = vram[(y * 1024) + (BYTE4_XOR_BE(x))];
*scanline++ = m_palette_val[(pixels&0xf0)];
*scanline++ = m_palette_val[((pixels<<4)&0xf0)];
@@ -218,13 +213,12 @@ uint32_t nubus_specpdq_device::screen_update(screen_device &screen, bitmap_rgb32
break;
case 3: // 8 bpp
- for (y = 0; y < 844; y++)
+ for (int y = 0; y < 844; y++)
{
- scanline = &bitmap.pix32(y);
-
- for (x = 0; x < 1152; x++)
+ uint32_t *scanline = &bitmap.pix(y);
+ for (int x = 0; x < 1152; x++)
{
- pixels = vram[(y * 1152) + (BYTE4_XOR_BE(x))];
+ uint8_t const pixels = vram[(y * 1152) + (BYTE4_XOR_BE(x))];
*scanline++ = m_palette_val[pixels];
}
}