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-rw-r--r--src/mame/audio/grchamp.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/src/mame/audio/grchamp.c b/src/mame/audio/grchamp.c
new file mode 100644
index 00000000000..2951ee04fd4
--- /dev/null
+++ b/src/mame/audio/grchamp.c
@@ -0,0 +1,62 @@
+/*************************************************************************
+
+ audio\grchamp.c
+
+*************************************************************************/
+#include "driver.h"
+#include "grchamp.h"
+
+
+/************************************************************************/
+/* Grand Champion Analog emulation */
+/* Written by Hans Andersson, dec 2005 */
+/************************************************************************/
+
+static const discrete_dac_r1_ladder grchamp_sound_dac1 =
+{
+ 8, // size of ladder
+ {RES_K(680), RES_K(330), RES_K(150), RES_K(82), RES_K(39), RES_K(20), RES_K(10), RES_K(4.7)},
+ 0,
+ 0, // no rBias
+ 0, // no rGnd
+ 0 // no cap
+};
+
+static const discrete_dac_r1_ladder grchamp_sound_dac2 =
+{
+ 8, // size of ladder
+ {RES_K(680), RES_K(330), RES_K(150), RES_K(82), RES_K(39), RES_K(20), RES_K(10), RES_K(4.7)},
+ 0,
+ 0, // no rBias
+ 0, // no rGnd
+ 0 // no cap
+};
+
+/* Nodes - Sounds */
+
+DISCRETE_SOUND_START(grchamp)
+
+ /************************************************/
+ /* Input register mapping for grand champion */
+ /************************************************/
+
+ DISCRETE_INPUT_LOGIC(GRCHAMP_ENGINE_CS_EN)
+ DISCRETE_INPUT_DATA (GRCHAMP_SIFT_DATA)
+ DISCRETE_INPUT_DATA (GRCHAMP_ATTACK_UP_DATA)
+ DISCRETE_INPUT_NOT (GRCHAMP_IDLING_EN)
+ DISCRETE_INPUT_LOGIC(GRCHAMP_FOG_EN)
+ DISCRETE_INPUT_DATA (GRCHAMP_PLAYER_SPEED_DATA)
+ DISCRETE_INPUT_DATA (GRCHAMP_ATTACK_SPEED_DATA)
+ DISCRETE_INPUT_DATA (GRCHAMP_A_DATA)
+ DISCRETE_INPUT_DATA (GRCHAMP_B_DATA)
+
+ DISCRETE_DAC_R1(NODE_20, 1, GRCHAMP_A_DATA, DEFAULT_TTL_V_LOGIC_1, &grchamp_sound_dac1)
+
+ DISCRETE_DAC_R1(NODE_21, 1, GRCHAMP_B_DATA, DEFAULT_TTL_V_LOGIC_1, &grchamp_sound_dac2)
+
+ DISCRETE_ADDER4(NODE_89, 1, 0, NODE_20, NODE_21, 0)
+
+ DISCRETE_OUTPUT(NODE_89, 5000)
+
+DISCRETE_SOUND_END
+