diff options
Diffstat (limited to 'src/devices/bus/a2bus/a2echoii.c')
-rw-r--r-- | src/devices/bus/a2bus/a2echoii.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/src/devices/bus/a2bus/a2echoii.c b/src/devices/bus/a2bus/a2echoii.c new file mode 100644 index 00000000000..e6be96b5d85 --- /dev/null +++ b/src/devices/bus/a2bus/a2echoii.c @@ -0,0 +1,103 @@ +// license:BSD-3-Clause +// copyright-holders:R. Belmont +/********************************************************************* + + a2echoii.c + + Implementation of the Street Electronics Echo II speech card + +*********************************************************************/ + +#include "a2echoii.h" +#include "includes/apple2.h" +#include "sound/tms5220.h" + +/*************************************************************************** + PARAMETERS +***************************************************************************/ + +//************************************************************************** +// GLOBAL VARIABLES +//************************************************************************** + +const device_type A2BUS_ECHOII = &device_creator<a2bus_echoii_device>; + +#define TMS_TAG "tms5220" + +MACHINE_CONFIG_FRAGMENT( a2echoii ) + MCFG_SPEAKER_STANDARD_MONO("echoii") + MCFG_SOUND_ADD(TMS_TAG, TMS5220, 640000) // Note the Echo II card has a "FREQ" potentiometer which can be used to adjust the tms5220's clock frequency; 640khz is the '8khz' value according to the tms5220 datasheet + MCFG_SOUND_ROUTE(ALL_OUTPUTS, "echoii", 1.0) +MACHINE_CONFIG_END + +/*************************************************************************** + FUNCTION PROTOTYPES +***************************************************************************/ + +//------------------------------------------------- +// machine_config_additions - device-specific +// machine configurations +//------------------------------------------------- + +machine_config_constructor a2bus_echoii_device::device_mconfig_additions() const +{ + return MACHINE_CONFIG_NAME( a2echoii ); +} + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +a2bus_echoii_device::a2bus_echoii_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source) : + device_t(mconfig, type, name, tag, owner, clock, shortname, source), + device_a2bus_card_interface(mconfig, *this), + m_tms(*this, TMS_TAG) +{ +} + +a2bus_echoii_device::a2bus_echoii_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, A2BUS_ECHOII, "Street Electronics Echo II", tag, owner, clock, "a2echoii", __FILE__), + device_a2bus_card_interface(mconfig, *this), + m_tms(*this, TMS_TAG) +{ +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void a2bus_echoii_device::device_start() +{ + // set_a2bus_device makes m_slot valid + set_a2bus_device(); +} + +void a2bus_echoii_device::device_reset() +{ +} + +UINT8 a2bus_echoii_device::read_c0nx(address_space &space, UINT8 offset) +{ + switch (offset) + { + case 0: + return 0x1f | m_tms->status_r(space, 0); + } + + return 0; +} + +void a2bus_echoii_device::write_c0nx(address_space &space, UINT8 offset, UINT8 data) +{ + switch (offset) + { + case 0: + m_tms->data_w(space, offset, data); + break; + } +} + +bool a2bus_echoii_device::take_c800() +{ + return false; +} |