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univac.cpp: Add speaker sound for "audible alarm"

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This commit is contained in:
AJR 2019-01-14 00:22:29 -05:00
parent c816ca06f7
commit 7447ff35aa
1 changed files with 29 additions and 5 deletions
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34
src/mame/drivers/univac.cpp
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@ -103,7 +103,7 @@ After entering the characters, press FCTN and CTRL PAGE keys again to save the s
#include "machine/nvram.h"
#include "machine/z80ctc.h"
#include "machine/z80sio.h"
#include "sound/beep.h"
#include "sound/spkrdev.h"
#include "video/dp8350.h"
#include "emupal.h"
#include "screen.h"
@ -130,7 +130,7 @@ public:
, m_ctc(*this, "ctc")
, m_keybclk(*this, "keybclk")
, m_sio(*this, "sio")
, m_beep(*this, "beeper")
, m_alarm(*this, "alarm")
, m_screen(*this, "screen")
, m_keyboard(*this, "keyboard")
, m_printer(*this, "printer")
@ -142,6 +142,8 @@ public:
, m_display_enable(false)
, m_framecnt(0)
, m_nvram_protect(false)
, m_alarm_enable(false)
, m_alarm_toggle(false)
, m_loopback_control(false)
, m_comm_rxd(true)
, m_sio_txda(true)
@ -167,6 +169,7 @@ private:
DECLARE_WRITE_LINE_MEMBER(ram_control_w);
DECLARE_WRITE_LINE_MEMBER(parity_poison_w);
DECLARE_WRITE_LINE_MEMBER(display_enable_w);
DECLARE_WRITE_LINE_MEMBER(alarm_enable_w);
DECLARE_WRITE_LINE_MEMBER(sio_loopback_w);
DECLARE_WRITE_LINE_MEMBER(sio_txda_w);
DECLARE_WRITE_LINE_MEMBER(sio_txdb_w);
@ -190,7 +193,7 @@ private:
required_device<z80ctc_device> m_ctc;
optional_device<clock_device> m_keybclk;
required_device<z80sio_device> m_sio;
required_device<beep_device> m_beep;
required_device<speaker_sound_device> m_alarm;
required_device<screen_device> m_screen;
required_device<uts_keyboard_port_device> m_keyboard;
@ -208,6 +211,9 @@ private:
u8 m_framecnt;
bool m_nvram_protect;
bool m_alarm_enable;
bool m_alarm_toggle;
bool m_loopback_control;
bool m_comm_rxd;
bool m_sio_txda;
@ -270,7 +276,15 @@ WRITE_LINE_MEMBER(univac_state::nvram_protect_w)
// There seems to be some timing-based write protection related to the CTC's TRG0 input.
// The present implementation is a crude approximation of a wild guess.
if (state)
{
m_nvram_protect = m_screen->vpos() < 10;
if (m_alarm_enable)
{
m_alarm_toggle = !m_alarm_toggle;
m_alarm->level_w(m_alarm_toggle);
}
}
}
WRITE_LINE_MEMBER(univac_state::select_disp_w)
@ -293,6 +307,13 @@ WRITE_LINE_MEMBER(univac_state::display_enable_w)
m_display_enable = state;
}
WRITE_LINE_MEMBER(univac_state::alarm_enable_w)
{
m_alarm_enable = state;
if (!state)
m_alarm->level_w(0);
}
WRITE_LINE_MEMBER(univac_state::sio_loopback_w)
{
if (state)
@ -444,6 +465,9 @@ void univac_state::machine_start()
save_item(NAME(m_parity_poison));
save_item(NAME(m_display_enable));
save_item(NAME(m_framecnt));
save_item(NAME(m_nvram_protect));
save_item(NAME(m_alarm_enable));
save_item(NAME(m_alarm_toggle));
save_item(NAME(m_loopback_control));
save_item(NAME(m_comm_rxd));
save_item(NAME(m_sio_txda));
@ -547,6 +571,7 @@ MACHINE_CONFIG_START(univac_state::uts20)
latch_40.q_out_cb<3>().set(FUNC(univac_state::ram_control_w));
ls259_device &latch_c0(LS259(config, "latch_c0")); // actual type and location unknown
latch_c0.q_out_cb<0>().set(FUNC(univac_state::alarm_enable_w));
latch_c0.q_out_cb<3>().set(FUNC(univac_state::display_enable_w));
latch_c0.q_out_cb<4>().set(FUNC(univac_state::parity_poison_w));
latch_c0.q_out_cb<6>().set(FUNC(univac_state::sio_loopback_w));
@ -592,8 +617,7 @@ MACHINE_CONFIG_START(univac_state::uts20)
/* Sound */
SPEAKER(config, "mono").front_center();
MCFG_DEVICE_ADD("beeper", BEEP, 950) // guess
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.05)
SPEAKER_SOUND(config, m_alarm).add_route(ALL_OUTPUTS, "mono", 0.05);
UTS_KEYBOARD(config, m_keyboard, uts20_keyboards, "extw");
m_keyboard->rxd_callback().set(FUNC(univac_state::aux_rxd_w));