diff options
author | smf- <smf-@users.noreply.github.com> | 2016-10-17 16:03:29 +0100 |
---|---|---|
committer | smf- <smf-@users.noreply.github.com> | 2016-10-17 16:04:02 +0100 |
commit | 36944269bd6fe1fb47822a2112c524b13c4b27f2 (patch) | |
tree | c1b29a760bb9a1e222a9390fbc34fe09d407ae91 /src/mame/drivers/meyc8080.cpp | |
parent | 8676fc0d8dd0c3ccf2925075d86338da099ce148 (diff) |
DAC WIP, started documenting the DACs in use. [smf]
ataxx: Fixed missing sound channel caused by one dac not being hooked up and one dac being hooked up to two addresses.
bestbest: Fixed high pitch screech caused by incorrect addressing (two dacs weren't hooked up and two were hooked up to two addresses).
cchasm: Fixed static noise generation caused by feeding the same bit to both dacs.
cheekyms: Slightly improved sound by implementing sound triggers as 8 x 1 bit dacs instead of 1 x 8 bit dac.
galeb: Fixed sound by implementing it according to http://www.deltasoft.com.hr/retro/galebemu.htm & implemented enough of LOAD/SAVE to stop it hanging.
hard drivin: (all games in driver) Improved 12 bit controls, although centre still goes out of sync.
mea8000: Converted to a sound device.
megaphx: Fixed noisy samples due to wrong format.
microvsn: Fixed sound pitch caused by incorrect usage of write_signed8().
seicross: Changed to a 4 bit dac as samples are packed nibble.
spaceg: Preliminary sound using space invaders samples.
suna8: Changed to a 4 bit dac as samples are packed nibble.
vcombat: Fixed static during machine gun fire due to incorrect dc offset removal.
vectrex: Fixed noisy samples due to wrong format.
wheelfir: Fixed sound, eeprom & analogue steering wheel and brake pedal.
Diffstat (limited to 'src/mame/drivers/meyc8080.cpp')
-rw-r--r-- | src/mame/drivers/meyc8080.cpp | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/src/mame/drivers/meyc8080.cpp b/src/mame/drivers/meyc8080.cpp index abd0cb8f070..095c615ae2e 100644 --- a/src/mame/drivers/meyc8080.cpp +++ b/src/mame/drivers/meyc8080.cpp @@ -57,8 +57,9 @@ #include "emu.h" #include "cpu/i8085/i8085.h" -#include "sound/dac.h" #include "machine/nvram.h" +#include "sound/dac.h" +#include "sound/volt_reg.h" #include "wldarrow.lh" #include "mdrawpkr.lh" @@ -89,7 +90,7 @@ public: DECLARE_WRITE8_MEMBER(meyc8080_dac_4_w); UINT32 screen_update_meyc8080(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect); required_device<cpu_device> m_maincpu; - required_device<dac_device> m_dac; + required_device<dac_byte_interface> m_dac; }; @@ -276,25 +277,25 @@ WRITE8_MEMBER(meyc8080_state::counters_w) WRITE8_MEMBER(meyc8080_state::meyc8080_dac_1_w) { - m_dac->write_unsigned8(0x00); + m_dac->write(0); } WRITE8_MEMBER(meyc8080_state::meyc8080_dac_2_w) { - m_dac->write_unsigned8(0x55); + m_dac->write(1); } WRITE8_MEMBER(meyc8080_state::meyc8080_dac_3_w) { - m_dac->write_unsigned8(0xaa); + m_dac->write(2); } WRITE8_MEMBER(meyc8080_state::meyc8080_dac_4_w) { - m_dac->write_unsigned8(0xff); + m_dac->write(3); } @@ -592,9 +593,10 @@ static MACHINE_CONFIG_START( meyc8080, meyc8080_state ) MCFG_SCREEN_UPDATE_DRIVER(meyc8080_state, screen_update_meyc8080) /* audio hardware */ - MCFG_SPEAKER_STANDARD_MONO("mono") - MCFG_DAC_ADD("dac") - MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0) + MCFG_SPEAKER_STANDARD_MONO("speaker") + MCFG_SOUND_ADD("dac", DAC_2BIT_R2R, 0) MCFG_SOUND_ROUTE(ALL_OUTPUTS, "speaker", 0.66) // unknown DAC + MCFG_DEVICE_ADD("vref", VOLTAGE_REGULATOR, 0) MCFG_VOLTAGE_REGULATOR_OUTPUT(5.0) + MCFG_SOUND_ROUTE_EX(0, "dac", 1.0, DAC_VREF_POS_INPUT) MCFG_SOUND_ROUTE_EX(0, "dac", -1.0, DAC_VREF_NEG_INPUT) MACHINE_CONFIG_END |