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-rw-r--r--src/mame/audio/harddriv.c398
1 files changed, 398 insertions, 0 deletions
diff --git a/src/mame/audio/harddriv.c b/src/mame/audio/harddriv.c
new file mode 100644
index 00000000000..3319698e5cf
--- /dev/null
+++ b/src/mame/audio/harddriv.c
@@ -0,0 +1,398 @@
+/***************************************************************************
+
+ Hard Drivin' sound hardware
+
+****************************************************************************/
+
+#include "driver.h"
+#include "cpu/tms32010/tms32010.h"
+#include "sound/dac.h"
+#include "machine/atarigen.h"
+#include "harddriv.h"
+
+
+#define BIO_FREQUENCY (1000000 / 50)
+#define CYCLES_PER_BIO (5000000 / BIO_FREQUENCY)
+
+
+UINT16 *hdsnddsp_ram;
+
+
+/*************************************
+ *
+ * Static globals
+ *
+ *************************************/
+
+static UINT8 soundflag;
+static UINT8 mainflag;
+static UINT16 sounddata;
+static UINT16 maindata;
+
+static UINT8 dacmute;
+static UINT8 cramen;
+static UINT8 irq68k;
+
+static offs_t sound_rom_offs;
+
+static UINT8 *rombase;
+static UINT32 romsize;
+static UINT16 *comram;
+
+static UINT32 last_bio_cycles;
+
+
+
+/*************************************
+ *
+ * Driver init
+ *
+ *************************************/
+
+void hdsnd_init(void)
+{
+ rombase = (UINT8 *)memory_region(REGION_SOUND1);
+ romsize = memory_region_length(REGION_SOUND1);
+ comram = (UINT16 *)auto_malloc(0x400);
+ last_bio_cycles = 0;
+}
+
+
+
+/*************************************
+ *
+ * Update flags
+ *
+ *************************************/
+
+static void update_68k_interrupts(void)
+{
+ int irqline = 0;
+
+ if (mainflag) irqline = 1;
+ if (irq68k) irqline = 3;
+
+ if (irqline)
+ cpunum_set_input_line(hdcpu_sound, irqline, ASSERT_LINE);
+ else
+ cpunum_set_input_line(hdcpu_sound, 7, CLEAR_LINE);
+}
+
+
+
+/*************************************
+ *
+ * I/O from main CPU side
+ *
+ *************************************/
+
+READ16_HANDLER( hd68k_snd_data_r )
+{
+ soundflag = 0;
+ logerror("%06X:main read from sound=%04X\n", activecpu_get_previouspc(), sounddata);
+ return sounddata;
+}
+
+
+READ16_HANDLER( hd68k_snd_status_r )
+{
+ return (mainflag << 15) | (soundflag << 14) | 0x1fff;
+}
+
+
+static TIMER_CALLBACK( delayed_68k_w )
+{
+ maindata = param;
+ mainflag = 1;
+ update_68k_interrupts();
+}
+
+
+WRITE16_HANDLER( hd68k_snd_data_w )
+{
+ timer_call_after_resynch(data, delayed_68k_w);
+ logerror("%06X:main write to sound=%04X\n", activecpu_get_previouspc(), data);
+}
+
+
+WRITE16_HANDLER( hd68k_snd_reset_w )
+{
+ cpunum_set_input_line(hdcpu_sound, INPUT_LINE_RESET, ASSERT_LINE);
+ cpunum_set_input_line(hdcpu_sound, INPUT_LINE_RESET, CLEAR_LINE);
+ mainflag = soundflag = 0;
+ update_68k_interrupts();
+ logerror("%06X:Reset sound\n", activecpu_get_previouspc());
+}
+
+
+
+/*************************************
+ *
+ * I/O from sound CPU side
+ *
+ *************************************/
+
+READ16_HANDLER( hdsnd68k_data_r )
+{
+ mainflag = 0;
+ update_68k_interrupts();
+ logerror("%06X:sound read from main=%04X\n", activecpu_get_previouspc(), maindata);
+ return maindata;
+}
+
+
+WRITE16_HANDLER( hdsnd68k_data_w )
+{
+ COMBINE_DATA(&sounddata);
+ soundflag = 1;
+ logerror("%06X:sound write to main=%04X\n", activecpu_get_previouspc(), data);
+}
+
+
+
+/*************************************
+ *
+ * Misc. 68k inputs
+ *
+ *************************************/
+
+READ16_HANDLER( hdsnd68k_switches_r )
+{
+ logerror("%06X:hdsnd68k_switches_r(%04X)\n", activecpu_get_previouspc(), offset);
+ return 0;
+}
+
+
+READ16_HANDLER( hdsnd68k_320port_r )
+{
+ logerror("%06X:hdsnd68k_320port_r(%04X)\n", activecpu_get_previouspc(), offset);
+ return 0;
+}
+
+
+READ16_HANDLER( hdsnd68k_status_r )
+{
+//FFFF 3000 R READSTAT Read Status
+// D15 = 'Main Flag'
+// D14 = 'Sound Flag'
+// D13 = Test Switch
+// D12 = 5220 Ready Flag (0=Ready)
+ logerror("%06X:hdsnd68k_status_r(%04X)\n", activecpu_get_previouspc(), offset);
+ return (mainflag << 15) | (soundflag << 14) | 0x2000 | 0;//((readinputport(0) & 0x0020) << 8) | 0;
+}
+
+
+
+/*************************************
+ *
+ * Misc. 68k outputs
+ *
+ *************************************/
+
+WRITE16_HANDLER( hdsnd68k_latches_w )
+{
+ /* bit 3 selects the value; data is ignored */
+ data = (offset >> 3) & 1;
+
+ /* low 3 bits select the function */
+ offset &= 7;
+ switch (offset)
+ {
+ case 0: /* SPWR - 5220 write strobe */
+ /* data == 0 means high, 1 means low */
+ logerror("%06X:SPWR=%d\n", activecpu_get_previouspc(), data);
+ break;
+
+ case 1: /* SPRES - 5220 hard reset */
+ /* data == 0 means low, 1 means high */
+ logerror("%06X:SPRES=%d\n", activecpu_get_previouspc(), data);
+ break;
+
+ case 2: /* SPRATE */
+ /* data == 0 means 8kHz, 1 means 10kHz */
+ logerror("%06X:SPRATE=%d\n", activecpu_get_previouspc(), data);
+ break;
+
+ case 3: /* CRAMEN */
+ /* data == 0 means disable 68k access to COM320, 1 means enable */
+ cramen = data;
+ break;
+
+ case 4: /* RES320 */
+ logerror("%06X:RES320=%d\n", activecpu_get_previouspc(), data);
+ if (hdcpu_sounddsp != -1)
+ cpunum_set_input_line(hdcpu_sounddsp, INPUT_LINE_HALT, data ? CLEAR_LINE : ASSERT_LINE);
+ break;
+
+ case 7: /* LED */
+ break;
+ }
+}
+
+
+WRITE16_HANDLER( hdsnd68k_speech_w )
+{
+ logerror("%06X:hdsnd68k_speech_w(%04X)=%04X\n", activecpu_get_previouspc(), offset, data);
+}
+
+
+WRITE16_HANDLER( hdsnd68k_irqclr_w )
+{
+ irq68k = 0;
+ update_68k_interrupts();
+}
+
+
+
+/*************************************
+ *
+ * TMS32010 access
+ *
+ *************************************/
+
+READ16_HANDLER( hdsnd68k_320ram_r )
+{
+ return hdsnddsp_ram[offset & 0xfff];
+}
+
+
+WRITE16_HANDLER( hdsnd68k_320ram_w )
+{
+ COMBINE_DATA(&hdsnddsp_ram[offset & 0xfff]);
+}
+
+
+READ16_HANDLER( hdsnd68k_320ports_r )
+{
+ UINT16 result;
+ cpuintrf_push_context(hdcpu_sounddsp);
+ result = TMS32010_In(offset & 7);
+ cpuintrf_pop_context();
+ return result;
+}
+
+
+WRITE16_HANDLER( hdsnd68k_320ports_w )
+{
+ cpuintrf_push_context(hdcpu_sounddsp);
+ TMS32010_Out(offset & 7, data);
+ cpuintrf_pop_context();
+}
+
+
+READ16_HANDLER( hdsnd68k_320com_r )
+{
+ if (cramen)
+ return comram[offset & 0x1ff];
+
+ logerror("%06X:hdsnd68k_320com_r(%04X) -- not allowed\n", activecpu_get_previouspc(), offset);
+ return 0xffff;
+}
+
+
+WRITE16_HANDLER( hdsnd68k_320com_w )
+{
+ if (cramen)
+ COMBINE_DATA(&comram[offset & 0x1ff]);
+ else
+ logerror("%06X:hdsnd68k_320com_w(%04X)=%04X -- not allowed\n", activecpu_get_previouspc(), offset, data);
+}
+
+
+
+/*************************************
+ *
+ * TMS32010 interrupts
+ *
+ *************************************/
+
+READ16_HANDLER( hdsnddsp_get_bio )
+{
+ UINT32 cycles_since_last_bio = activecpu_gettotalcycles() - last_bio_cycles;
+ INT32 cycles_until_bio = CYCLES_PER_BIO - cycles_since_last_bio;
+
+ /* if we're not at the next BIO yet, advance us there */
+ if (cycles_until_bio > 0)
+ {
+ activecpu_adjust_icount(-cycles_until_bio);
+ last_bio_cycles += CYCLES_PER_BIO;
+ }
+ else
+ last_bio_cycles = activecpu_gettotalcycles();
+ return ASSERT_LINE;
+}
+
+
+
+/*************************************
+ *
+ * TMS32010 ports
+ *
+ *************************************/
+
+WRITE16_HANDLER( hdsnddsp_dac_w )
+{
+ /* DAC L */
+ if (!dacmute)
+ DAC_signed_data_16_w(offset, data ^ 0x8000);
+}
+
+
+WRITE16_HANDLER( hdsnddsp_comport_w )
+{
+ /* COM port TD0-7 */
+ logerror("%06X:hdsnddsp_comport_w=%d\n", activecpu_get_previouspc(), data);
+}
+
+
+WRITE16_HANDLER( hdsnddsp_mute_w )
+{
+ /* mute DAC audio, D0=1 */
+/* dacmute = data & 1; -- NOT STUFFED */
+ logerror("%06X:mute DAC=%d\n", activecpu_get_previouspc(), data);
+}
+
+
+WRITE16_HANDLER( hdsnddsp_gen68kirq_w )
+{
+ /* generate 68k IRQ */
+ irq68k = 1;
+ update_68k_interrupts();
+}
+
+
+WRITE16_HANDLER( hdsnddsp_soundaddr_w )
+{
+ if (offset == 0)
+ {
+ /* select sound ROM block */
+ sound_rom_offs = (sound_rom_offs & 0xffff) | ((data & 15) << 16);
+ }
+ else
+ {
+ /* sound memory address */
+ sound_rom_offs = (sound_rom_offs & ~0xffff) | (data & 0xffff);
+ }
+}
+
+
+READ16_HANDLER( hdsnddsp_rom_r )
+{
+ if (sound_rom_offs < romsize)
+ return rombase[sound_rom_offs++] << 7;
+ sound_rom_offs++;
+ return 0;
+}
+
+
+READ16_HANDLER( hdsnddsp_comram_r )
+{
+ return comram[sound_rom_offs++ & 0x1ff];
+}
+
+
+READ16_HANDLER( hdsnddsp_compare_r )
+{
+ logerror("%06X:hdsnddsp_compare_r(%04X)\n", activecpu_get_previouspc(), offset);
+ return 0;
+}