summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/drivers/jongkyo.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/mame/drivers/jongkyo.cpp')
-rw-r--r--src/mame/drivers/jongkyo.cpp25
1 files changed, 8 insertions, 17 deletions
diff --git a/src/mame/drivers/jongkyo.cpp b/src/mame/drivers/jongkyo.cpp
index 1193f11fa83..98f8ed1d3b0 100644
--- a/src/mame/drivers/jongkyo.cpp
+++ b/src/mame/drivers/jongkyo.cpp
@@ -98,18 +98,10 @@ void jongkyo_state::video_start()
uint32_t jongkyo_state::screen_update_jongkyo(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
- int y;
-
- for (y = 0; y < 256; ++y)
+ for (int y = 0; y < 256; ++y)
{
- int x;
-
- for (x = 0; x < 256; x += 4)
+ for (int x = 0; x < 256; x += 4)
{
- int b;
- int res_x,res_y;
- uint8_t data1;
- uint8_t data2;
uint8_t data3;
// data3 = m_videoram2[x/4 + y*64]; // wrong
@@ -120,15 +112,14 @@ uint32_t jongkyo_state::screen_update_jongkyo(screen_device &screen, bitmap_ind1
// data3 = 0x00; // we're missing 2 bits.. there must be another piece of video ram somewhere or we can't use all the colours (6bpp).. banked somehow?
+ uint8_t data1 = m_videoram[0x4000 + x / 4 + y * 64];
+ uint8_t data2 = m_videoram[x / 4 + y * 64];
- data1 = m_videoram[0x4000 + x / 4 + y * 64];
- data2 = m_videoram[x / 4 + y * 64];
-
- for (b = 0; b < 4; ++b)
+ for (int b = 0; b < 4; ++b)
{
- res_x = m_flip_screen ? 255 - (x + b) : (x + b);
- res_y = m_flip_screen ? 255 - y : y;
- bitmap.pix16(res_y, res_x) = ((data2 & 0x01)) + ((data2 & 0x10) >> 3) +
+ int const res_x = m_flip_screen ? 255 - (x + b) : (x + b);
+ int const res_y = m_flip_screen ? 255 - y : y;
+ bitmap.pix(res_y, res_x) = ((data2 & 0x01)) + ((data2 & 0x10) >> 3) +
((data1 & 0x01) << 2) + ((data1 & 0x10) >> 1) +
((data3 & 0x01) << 4) + ((data3 & 0x10) << 1);
data1 >>= 1;