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/**********************************************************************
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RCA CDP1863 CMOS 8-Bit Programmable Frequency Generator emulation
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Visit http://mamedev.org for licensing and usage restrictions.
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**********************************************************************/
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- what happens if you connect both clocks?
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#include "cpu/cdp1802/cdp1802.h"
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/***************************************************************************
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***************************************************************************/
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#define CDP1863_DEFAULT_LATCH 0x35
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/***************************************************************************
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***************************************************************************/
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typedef struct _cdp1863_t cdp1863_t;
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int clock1; /* clock 1 */
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int clock2; /* clock 2 */
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sound_stream *stream; /* sound output */
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int oe; /* output enable */
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int latch; /* sound latch */
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INT16 signal; /* current signal */
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int incr; /* initial wave state */
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/***************************************************************************
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***************************************************************************/
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INLINE cdp1863_t *get_safe_token(const device_config *device)
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assert(device != NULL);
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assert(device->token != NULL);
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return (cdp1863_t *)device->token;
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INLINE cdp1863_config *get_safe_config(const device_config *device)
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assert(device != NULL);
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return (cdp1863_config *)device->inline_config;
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/***************************************************************************
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***************************************************************************/
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/*-------------------------------------------------
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cdp1863_str_w - tone latch write
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-------------------------------------------------*/
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WRITE8_DEVICE_HANDLER( cdp1863_str_w )
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cdp1863_t *cdp1863 = get_safe_token(device);
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cdp1863->latch = data;
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/*-------------------------------------------------
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cdp1863_oe_w - output enable write
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------------------------------------------------*/
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WRITE_LINE_DEVICE_HANDLER( cdp1863_oe_w )
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cdp1863_t *cdp1863 = get_safe_token(device);
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/*-------------------------------------------------
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cdp1863_set_clk1 - set clock 1 frequency
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------------------------------------------------*/
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void cdp1863_set_clk1(const device_config *device, int frequency)
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cdp1863_t *cdp1863 = get_safe_token(device);
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cdp1863->clock1 = frequency;
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/*-------------------------------------------------
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cdp1863_set_clk2 - set clock 2 frequency
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------------------------------------------------*/
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void cdp1863_set_clk2(const device_config *device, int frequency)
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cdp1863_t *cdp1863 = get_safe_token(device);
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cdp1863->clock2 = frequency;
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/*-------------------------------------------------
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STREAM_UPDATE( cdp1863_stream_update )
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-------------------------------------------------*/
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static STREAM_UPDATE( cdp1863_stream_update )
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cdp1863_t *cdp1863 = get_safe_token(device);
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INT16 signal = cdp1863->signal;
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stream_sample_t *buffer = outputs[0];
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memset( buffer, 0, samples * sizeof(*buffer) );
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int rate = device->machine->sample_rate / 2;
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/* get progress through wave */
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int incr = cdp1863->incr;
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if (cdp1863->clock1 > 0)
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/* CLK1 is pre-divided by 4 */
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frequency = cdp1863->clock1 / 4 / (cdp1863->latch + 1) / 2;
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/* CLK2 is pre-divided by 8 */
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frequency = cdp1863->clock2 / 8 / (cdp1863->latch + 1) / 2;
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while( samples-- > 0 )
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/* store progress through wave */
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cdp1863->incr = incr;
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cdp1863->signal = signal;
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/*-------------------------------------------------
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DEVICE_START( cdp1863 )
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-------------------------------------------------*/
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static DEVICE_START( cdp1863 )
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cdp1863_t *cdp1863 = get_safe_token(device);
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const cdp1863_config *config = get_safe_config(device);
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/* set initial values */
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cdp1863->stream = stream_create(device, 0, 1, device->machine->sample_rate, cdp1863, cdp1863_stream_update);
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cdp1863->clock1 = device->clock;
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cdp1863->clock2 = config->clock2;
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/* register for state saving */
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state_save_register_device_item(device, 0, cdp1863->clock1);
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state_save_register_device_item(device, 0, cdp1863->clock2);
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state_save_register_device_item(device, 0, cdp1863->oe);
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state_save_register_device_item(device, 0, cdp1863->latch);
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state_save_register_device_item(device, 0, cdp1863->signal);
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state_save_register_device_item(device, 0, cdp1863->incr);
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/*-------------------------------------------------
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DEVICE_RESET( cdp1863 )
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-------------------------------------------------*/
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static DEVICE_RESET( cdp1863 )
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cdp1863_t *cdp1863 = get_safe_token(device);
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cdp1863->latch = CDP1863_DEFAULT_LATCH;
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/*-------------------------------------------------
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DEVICE_GET_INFO( cdp1863 )
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-------------------------------------------------*/
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DEVICE_GET_INFO( cdp1863 )
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/* --- the following bits of info are returned as 64-bit signed integers --- */
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case DEVINFO_INT_TOKEN_BYTES: info->i = sizeof(cdp1863_t); break;
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case DEVINFO_INT_INLINE_CONFIG_BYTES: info->i = sizeof(cdp1863_config); break;
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/* --- the following bits of info are returned as pointers to data or functions --- */
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case DEVINFO_FCT_START: info->start = DEVICE_START_NAME(cdp1863); break;
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case DEVINFO_FCT_STOP: /* Nothing */ break;
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case DEVINFO_FCT_RESET: info->reset = DEVICE_RESET_NAME(cdp1863); break;
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/* --- the following bits of info are returned as NULL-terminated strings --- */
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case DEVINFO_STR_NAME: strcpy(info->s, "RCA CDP1863"); break;
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case DEVINFO_STR_FAMILY: strcpy(info->s, "RCA CDP1800"); break;
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case DEVINFO_STR_VERSION: strcpy(info->s, "1.0"); break;
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case DEVINFO_STR_SOURCE_FILE: strcpy(info->s, __FILE__); break;
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case DEVINFO_STR_CREDITS: strcpy(info->s, "Copyright MESS Team"); break;
added
removed
src/emu/sound/cdp1863.c
