226 lines
8.5 KiB
C#
226 lines
8.5 KiB
C#
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using System.IO;
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namespace MAME.Core
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{
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public class Taitosnd
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{
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public static byte TC0140SYT_PORT01_FULL, TC0140SYT_PORT23_FULL, TC0140SYT_PORT01_FULL_MASTER, TC0140SYT_PORT23_FULL_MASTER;
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public struct TC0140SYT
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{
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public byte[] slavedata;
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public byte[] masterdata;
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public byte mainmode;
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public byte submode;
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public byte status;
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public byte nmi_enabled;
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public byte nmi_req;
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}
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public static TC0140SYT tc0140syt;
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public static void taitosnd_start()
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{
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tc0140syt = new TC0140SYT();
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tc0140syt.slavedata = new byte[4];
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tc0140syt.masterdata = new byte[4];
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tc0140syt.mainmode = 0;
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tc0140syt.submode = 0;
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tc0140syt.status = 0;
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tc0140syt.nmi_enabled = 0;
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tc0140syt.nmi_req = 0;
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TC0140SYT_PORT01_FULL = 0x01;
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TC0140SYT_PORT23_FULL = 0x02;
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TC0140SYT_PORT01_FULL_MASTER = 0x04;
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TC0140SYT_PORT23_FULL_MASTER = 0x08;
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}
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public static void Interrupt_Controller()
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{
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if ((tc0140syt.nmi_req != 0) && (tc0140syt.nmi_enabled != 0))
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{
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Cpuint.cpunum_set_input_line(1, (int)LineState.INPUT_LINE_NMI, LineState.PULSE_LINE);
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tc0140syt.nmi_req = 0;
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}
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}
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public static void taitosound_port_w(int offset, byte data)
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{
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data &= 0x0f;
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tc0140syt.mainmode = data;
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}
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public static void taitosound_comm_w(int offset, byte data)
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{
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data &= 0x0f; /*this is important, otherwise ballbros won't work*/
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switch (tc0140syt.mainmode)
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{
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case 0x00: // mode #0
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tc0140syt.slavedata[tc0140syt.mainmode++] = data;
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break;
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case 0x01: // mode #1
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tc0140syt.slavedata[tc0140syt.mainmode++] = data;
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tc0140syt.status |= TC0140SYT_PORT01_FULL;
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tc0140syt.nmi_req = 1;
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break;
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case 0x02: // mode #2
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tc0140syt.slavedata[tc0140syt.mainmode++] = data;
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break;
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case 0x03: // mode #3
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tc0140syt.slavedata[tc0140syt.mainmode++] = data;
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tc0140syt.status |= TC0140SYT_PORT23_FULL;
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tc0140syt.nmi_req = 1;
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break;
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case 0x04: // port status
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/* this does a hi-lo transition to reset the sound cpu */
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if (data != 0)
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{
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Cpuint.cpunum_set_input_line(1, (int)LineState.INPUT_LINE_RESET, LineState.ASSERT_LINE);
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}
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else
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{
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Cpuint.cpunum_set_input_line(1, (int)LineState.INPUT_LINE_RESET, LineState.CLEAR_LINE);
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Cpuexec.cpu_spin(); /* otherwise no sound in driftout */
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}
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break;
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default:
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break;
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}
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}
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public static byte taitosound_comm_r(int offset)
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{
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byte result;
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switch (tc0140syt.mainmode)
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{
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case 0x00: // mode #0
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result = tc0140syt.masterdata[tc0140syt.mainmode++];
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break;
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case 0x01: // mode #1
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tc0140syt.status &= (byte)(~TC0140SYT_PORT01_FULL_MASTER);
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result = tc0140syt.masterdata[tc0140syt.mainmode++];
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break;
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case 0x02: // mode #2
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result = tc0140syt.masterdata[tc0140syt.mainmode++];
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break;
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case 0x03: // mode #3
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tc0140syt.status &= (byte)(~TC0140SYT_PORT23_FULL_MASTER);
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result = tc0140syt.masterdata[tc0140syt.mainmode++];
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break;
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case 0x04: // port status
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result = tc0140syt.status;
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break;
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default:
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result = 0;
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break;
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}
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return result;
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}
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public static void taitosound_slave_port_w(byte data)
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{
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data &= 0x0f;
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tc0140syt.submode = data;
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}
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public static void taitosound_slave_comm_w(byte data)
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{
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data &= 0x0f;
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switch (tc0140syt.submode)
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{
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case 0x00: // mode #0
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tc0140syt.masterdata[tc0140syt.submode++] = data;
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break;
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case 0x01: // mode #1
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tc0140syt.masterdata[tc0140syt.submode++] = data;
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tc0140syt.status |= TC0140SYT_PORT01_FULL_MASTER;
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Cpuexec.cpu_spin(); /* writing should take longer than emulated, so spin */
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break;
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case 0x02: // mode #2
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tc0140syt.masterdata[tc0140syt.submode++] = data;
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break;
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case 0x03: // mode #3
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tc0140syt.masterdata[tc0140syt.submode++] = data;
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tc0140syt.status |= TC0140SYT_PORT23_FULL_MASTER;
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Cpuexec.cpu_spin(); /* writing should take longer than emulated, so spin */
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break;
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case 0x04: // port status
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break;
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case 0x05: // nmi disable
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tc0140syt.nmi_enabled = 0;
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break;
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case 0x06: // nmi enable
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tc0140syt.nmi_enabled = 1;
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break;
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default:
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break;
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}
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Interrupt_Controller();
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}
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public static byte taitosound_slave_comm_r()
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{
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byte res = 0;
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switch (tc0140syt.submode)
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{
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case 0x00: // mode #0
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res = tc0140syt.slavedata[tc0140syt.submode++];
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break;
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case 0x01: // mode #1
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tc0140syt.status &= unchecked((byte)(~0x01));
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res = tc0140syt.slavedata[tc0140syt.submode++];
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break;
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case 0x02: // mode #2
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res = tc0140syt.slavedata[tc0140syt.submode++];
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break;
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case 0x03: // mode #3
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tc0140syt.status &= unchecked((byte)(~0x02));
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res = tc0140syt.slavedata[tc0140syt.submode++];
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break;
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case 0x04: // port status
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res = tc0140syt.status;
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break;
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default:
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res = 0;
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break;
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}
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Interrupt_Controller();
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return res;
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}
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public static void taitosound_port16_msb_w(ushort data)
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{
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//if (ACCESSING_BITS_8_15)
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taitosound_port_w(0, (byte)(data >> 8));
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}
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public static void taitosound_port16_msb_w1(byte data)
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{
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//if (ACCESSING_BITS_8_15)
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taitosound_port_w(0, data);
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}
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public static void taitosound_comm16_msb_w(ushort data)
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{
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//if (ACCESSING_BITS_8_15)
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taitosound_comm_w(0, (byte)(data >> 8));
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}
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public static void taitosound_comm16_msb_w1(byte data)
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{
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//if (ACCESSING_BITS_8_15)
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taitosound_comm_w(0, data);
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}
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public static ushort taitosound_comm16_msb_r()
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{
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return (ushort)(taitosound_comm_r(0) << 8);
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}
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public static void SaveStateBinary(BinaryWriter writer)
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{
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writer.Write(tc0140syt.slavedata, 0, 4);
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writer.Write(tc0140syt.masterdata, 0, 4);
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writer.Write(tc0140syt.mainmode);
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writer.Write(tc0140syt.submode);
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writer.Write(tc0140syt.status);
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writer.Write(tc0140syt.nmi_enabled);
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writer.Write(tc0140syt.nmi_req);
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}
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public static void LoadStateBinary(BinaryReader reader)
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{
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tc0140syt.slavedata = reader.ReadBytes(4);
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tc0140syt.masterdata = reader.ReadBytes(4);
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tc0140syt.mainmode = reader.ReadByte();
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tc0140syt.submode = reader.ReadByte();
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tc0140syt.status = reader.ReadByte();
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tc0140syt.nmi_enabled = reader.ReadByte();
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tc0140syt.nmi_req = reader.ReadByte();
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}
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}
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}
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