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Diffstat (limited to 'src/mess/video/channelf.c')
-rw-r--r--src/mess/video/channelf.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/src/mess/video/channelf.c b/src/mess/video/channelf.c
new file mode 100644
index 00000000000..32ae62ffc2e
--- /dev/null
+++ b/src/mess/video/channelf.c
@@ -0,0 +1,71 @@
+#include "includes/channelf.h"
+
+static const rgb_t channelf_palette[] =
+{
+ MAKE_RGB(0x10, 0x10, 0x10), /* black */
+ MAKE_RGB(0xfd, 0xfd, 0xfd), /* white */
+ MAKE_RGB(0xff, 0x31, 0x53), /* red */
+ MAKE_RGB(0x02, 0xcc, 0x5d), /* green */
+ MAKE_RGB(0x4b, 0x3f, 0xf3), /* blue */
+ MAKE_RGB(0xe0, 0xe0, 0xe0), /* ltgray */
+ MAKE_RGB(0x91, 0xff, 0xa6), /* ltgreen */
+ MAKE_RGB(0xce, 0xd0, 0xff) /* ltblue */
+};
+
+#define BLACK 0
+#define WHITE 1
+#define RED 2
+#define GREEN 3
+#define BLUE 4
+#define LTGRAY 5
+#define LTGREEN 6
+#define LTBLUE 7
+
+static const UINT16 colormap[] = {
+ BLACK, WHITE, WHITE, WHITE,
+ LTBLUE, BLUE, RED, GREEN,
+ LTGRAY, BLUE, RED, GREEN,
+ LTGREEN, BLUE, RED, GREEN,
+};
+
+/* Initialise the palette */
+PALETTE_INIT( channelf )
+{
+ palette_set_colors(machine, 0, channelf_palette, ARRAY_LENGTH(channelf_palette));
+}
+
+VIDEO_START( channelf )
+{
+ channelf_state *state = machine.driver_data<channelf_state>();
+ state->m_p_videoram = state->memregion("vram")->base();
+}
+
+static int recalc_palette_offset(int reg1, int reg2)
+{
+ /* Note: This is based on the decoding they used to */
+ /* determine which palette this line is using */
+
+ return ((reg2&0x2)|(reg1>>1)) << 2;
+}
+
+SCREEN_UPDATE_IND16( channelf )
+{
+ channelf_state *state = screen.machine().driver_data<channelf_state>();
+ UINT8 y,col;
+ UINT16 ma=0,x;
+ int palette_offset;
+
+ for(y = 0; y < 64; y++ )
+ {
+ UINT16 *p = &bitmap.pix16(y);
+ palette_offset = recalc_palette_offset(state->m_p_videoram[y*128+125]&3, state->m_p_videoram[y*128+126]&3);
+
+ for (x = ma; x < ma + 128; x++)
+ {
+ col = palette_offset+(state->m_p_videoram[x|(y<<7)]&3);
+ *p++ = colormap[col];
+ }
+ ma+=128;
+ }
+ return 0;
+}