mirror of
https://github.com/holub/mame
synced 2025-10-05 08:41:31 +03:00
csd: Update interface to better reflect real hardware, add address
deocoding PAL and verify memory map
This commit is contained in:
Dirk Best
parent
0295ac745d
commit
fe3f74a3e9
@ -16,135 +16,20 @@
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extern const device_type MIDWAY_CHEAP_SQUEAK_DELUXE = &device_creator<midway_cheap_squeak_deluxe_device>;
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//-------------------------------------------------
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// midway_cheap_squeak_deluxe_device - constructor
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// audio cpu map
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//-------------------------------------------------
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midway_cheap_squeak_deluxe_device::midway_cheap_squeak_deluxe_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
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: device_t(mconfig, MIDWAY_CHEAP_SQUEAK_DELUXE, "Cheap Squeak Deluxe Sound Board", tag, owner, clock, "midcsd", __FILE__),
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device_mixer_interface(mconfig, *this),
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m_cpu(*this, "cpu"),
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m_pia(*this, "pia"),
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m_dac(*this, "dac"),
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m_status(0),
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m_dacval(0)
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{
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}
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//-------------------------------------------------
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// read - return the status value
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//-------------------------------------------------
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READ8_MEMBER(midway_cheap_squeak_deluxe_device::read)
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{
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return m_status;
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}
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//-------------------------------------------------
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// write - handle an external write to the input
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// latch
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//-------------------------------------------------
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WRITE8_MEMBER(midway_cheap_squeak_deluxe_device::write)
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{
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synchronize(0, data);
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}
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//-------------------------------------------------
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// reset_write - write to the reset line
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//-------------------------------------------------
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WRITE_LINE_MEMBER(midway_cheap_squeak_deluxe_device::reset_write)
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{
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m_cpu->set_input_line(INPUT_LINE_RESET, state ? ASSERT_LINE : CLEAR_LINE);
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}
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//-------------------------------------------------
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// porta_w - PIA port A writes
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//-------------------------------------------------
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WRITE8_MEMBER(midway_cheap_squeak_deluxe_device::porta_w)
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{
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m_dacval = (data << 2) | (m_dacval & 3);
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m_dac->write(m_dacval);
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}
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//-------------------------------------------------
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// portb_w - PIA port B writes
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//-------------------------------------------------
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WRITE8_MEMBER(midway_cheap_squeak_deluxe_device::portb_w)
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{
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m_dacval = (m_dacval & ~3) | (data >> 6);
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m_dac->write(m_dacval);
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uint8_t z_mask = m_pia->port_b_z_mask();
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if (~z_mask & 0x10) m_status = (m_status & ~1) | ((data >> 4) & 1);
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if (~z_mask & 0x20) m_status = (m_status & ~2) | ((data >> 4) & 2);
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}
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//-------------------------------------------------
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// irq_w - IRQ line state changes
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//-------------------------------------------------
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WRITE_LINE_MEMBER(midway_cheap_squeak_deluxe_device::irq_w)
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{
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int combined_state = m_pia->irq_a_state() | m_pia->irq_b_state();
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m_cpu->set_input_line(4, combined_state ? ASSERT_LINE : CLEAR_LINE);
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}
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//-------------------------------------------------
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// pia_r - PIA read access
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//-------------------------------------------------
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READ16_MEMBER(midway_cheap_squeak_deluxe_device::pia_r)
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{
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// Spy Hunter accesses the MSB; Turbo Tag access via the LSB
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// My guess is that Turbo Tag works through a fluke, whereby the 68000
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// using the MOVEP instruction outputs the same value on the high and
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// low bytes.
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if (ACCESSING_BITS_8_15)
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return m_pia->read_alt(space, offset) << 8;
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else
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return m_pia->read_alt(space, offset);
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}
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//-------------------------------------------------
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// pia_w - PIA write access
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//-------------------------------------------------
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WRITE16_MEMBER(midway_cheap_squeak_deluxe_device::pia_w)
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{
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if (ACCESSING_BITS_8_15)
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m_pia->write_alt(space, offset, data >> 8);
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else
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m_pia->write_alt(space, offset, data);
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}
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//-------------------------------------------------
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// audio CPU map
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//-------------------------------------------------
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// address map determined by PAL; not verified
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// address map determined by PAL; verified
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static ADDRESS_MAP_START( csdeluxe_map, AS_PROGRAM, 16, midway_cheap_squeak_deluxe_device )
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ADDRESS_MAP_UNMAP_HIGH
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ADDRESS_MAP_GLOBAL_MASK(0x1ffff)
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AM_RANGE(0x000000, 0x007fff) AM_ROM
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AM_RANGE(0x018000, 0x018007) AM_READWRITE(pia_r, pia_w)
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AM_RANGE(0x01c000, 0x01cfff) AM_RAM
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AM_RANGE(0x00000, 0x07fff) AM_ROM
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AM_RANGE(0x18000, 0x18007) AM_MIRROR(0x3ff8) AM_DEVREADWRITE8("pia", pia6821_device, read_alt, write_alt, 0xff00) // Spy Hunter accesses the MSB
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AM_RANGE(0x18000, 0x18007) AM_MIRROR(0x3ff8) AM_DEVREADWRITE8("pia", pia6821_device, read_alt, write_alt, 0x00ff) // Turbo Tag access via the LSB
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AM_RANGE(0x1c000, 0x1cfff) AM_RAM
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ADDRESS_MAP_END
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//-------------------------------------------------
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// machine configuration
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//-------------------------------------------------
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@ -164,17 +49,39 @@ static MACHINE_CONFIG_FRAGMENT(midway_cheap_squeak_deluxe)
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MCFG_SOUND_ROUTE_EX(0, "dac", 1.0, DAC_VREF_POS_INPUT) MCFG_SOUND_ROUTE_EX(0, "dac", -1.0, DAC_VREF_NEG_INPUT)
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MACHINE_CONFIG_END
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//-------------------------------------------------
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// device_mconfig_additions - return a pointer to
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// the device's machine fragment
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//-------------------------------------------------
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machine_config_constructor midway_cheap_squeak_deluxe_device::device_mconfig_additions() const
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{
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return MACHINE_CONFIG_NAME( midway_cheap_squeak_deluxe );
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}
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//-------------------------------------------------
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// rom_region - device-specific ROM region
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//-------------------------------------------------
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ROM_START( csd )
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ROM_REGION(0x4a, "pal", 0)
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ROM_LOAD("0304-00803-0052.u15", 0x00, 0x4a, CRC(8b401aee) SHA1(360f3f59877f0bc25b4154782a2011963dd80a52)) // address decoding pal CSD002R0 (PAL14L8)
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ROM_END
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const tiny_rom_entry *midway_cheap_squeak_deluxe_device::device_rom_region() const
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{
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return ROM_NAME( csd );
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}
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//-------------------------------------------------
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// midway_cheap_squeak_deluxe_device - constructor
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//-------------------------------------------------
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midway_cheap_squeak_deluxe_device::midway_cheap_squeak_deluxe_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
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device_t(mconfig, MIDWAY_CHEAP_SQUEAK_DELUXE, "Cheap Squeak Deluxe Sound Board", tag, owner, clock, "midcsd", __FILE__),
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device_mixer_interface(mconfig, *this),
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m_cpu(*this, "cpu"),
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m_pia(*this, "pia"),
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m_dac(*this, "dac"),
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m_status(0),
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m_dacval(0)
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{
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}
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//-------------------------------------------------
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// device_start - device-specific startup
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@ -186,26 +93,88 @@ void midway_cheap_squeak_deluxe_device::device_start()
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save_item(NAME(m_dacval));
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}
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//-------------------------------------------------
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// device_reset - device-specific reset
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//-------------------------------------------------
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void midway_cheap_squeak_deluxe_device::device_reset()
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{
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}
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//-------------------------------------------------
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// device_timer - timer callbacks
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//-------------------------------------------------
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void midway_cheap_squeak_deluxe_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
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{
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m_pia->portb_w(param & 0x0f);
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m_pia->ca1_w(~param & 0x10);
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m_pia->ca1_w(param);
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// oftentimes games will write one nibble at a time; the sync on this is very
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// important, so we boost the interleave briefly while this happens
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machine().scheduler().boost_interleave(attotime::zero, attotime::from_usec(100));
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}
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//-------------------------------------------------
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// stat_r - return the status value
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//-------------------------------------------------
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READ8_MEMBER( midway_cheap_squeak_deluxe_device::stat_r )
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{
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return m_status;
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}
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//-------------------------------------------------
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// sr_w - external 4-bit write to the input latch
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//-------------------------------------------------
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WRITE8_MEMBER( midway_cheap_squeak_deluxe_device::sr_w )
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{
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m_pia->portb_w(data & 0x0f);
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}
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//-------------------------------------------------
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// sirq_w - external irq write
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//-------------------------------------------------
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WRITE_LINE_MEMBER( midway_cheap_squeak_deluxe_device::sirq_w )
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{
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synchronize(0, !state);
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}
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//-------------------------------------------------
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// reset_write - write to the reset line
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//-------------------------------------------------
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WRITE_LINE_MEMBER( midway_cheap_squeak_deluxe_device::reset_w )
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{
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m_cpu->set_input_line(INPUT_LINE_RESET, state ? ASSERT_LINE : CLEAR_LINE);
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m_cpu->set_input_line(INPUT_LINE_HALT, state ? ASSERT_LINE : CLEAR_LINE);
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}
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//-------------------------------------------------
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// porta_w - PIA port A writes
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//-------------------------------------------------
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WRITE8_MEMBER( midway_cheap_squeak_deluxe_device::porta_w )
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{
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m_dacval = (data << 2) | (m_dacval & 3);
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m_dac->write(m_dacval);
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}
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//-------------------------------------------------
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// portb_w - PIA port B writes
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//-------------------------------------------------
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WRITE8_MEMBER( midway_cheap_squeak_deluxe_device::portb_w )
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{
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// bit 4-5, status
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uint8_t z_mask = m_pia->port_b_z_mask();
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if (~z_mask & 0x10) m_status = (m_status & ~1) | ((data >> 4) & 1);
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if (~z_mask & 0x20) m_status = (m_status & ~2) | ((data >> 4) & 2);
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// bit 6-7, dac data
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m_dacval = (m_dacval & ~3) | (data >> 6);
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m_dac->write(m_dacval);
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}
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//-------------------------------------------------
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// irq_w - IRQ line state changes
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//-------------------------------------------------
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WRITE_LINE_MEMBER( midway_cheap_squeak_deluxe_device::irq_w )
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{
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int combined_state = m_pia->irq_a_state() | m_pia->irq_b_state();
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m_cpu->set_input_line(4, combined_state ? ASSERT_LINE : CLEAR_LINE);
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}
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@ -23,30 +23,28 @@
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// ======================> midway_cheap_squeak_deluxe_device
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class midway_cheap_squeak_deluxe_device : public device_t,
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public device_mixer_interface
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class midway_cheap_squeak_deluxe_device : public device_t, public device_mixer_interface
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{
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public:
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// construction/destruction
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midway_cheap_squeak_deluxe_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
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// read/write
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DECLARE_READ8_MEMBER(read);
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DECLARE_WRITE8_MEMBER(write);
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DECLARE_WRITE_LINE_MEMBER(reset_write);
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DECLARE_READ8_MEMBER(stat_r);
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DECLARE_WRITE8_MEMBER(sr_w);
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DECLARE_WRITE_LINE_MEMBER(sirq_w);
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DECLARE_WRITE_LINE_MEMBER(reset_w);
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// internal communications
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DECLARE_WRITE8_MEMBER(porta_w);
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DECLARE_WRITE8_MEMBER(portb_w);
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DECLARE_WRITE_LINE_MEMBER(irq_w);
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DECLARE_READ16_MEMBER(pia_r);
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DECLARE_WRITE16_MEMBER(pia_w);
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protected:
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// device-level overrides
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virtual machine_config_constructor device_mconfig_additions() const override;
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virtual const tiny_rom_entry *device_rom_region() const override;
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virtual void device_start() override;
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virtual void device_reset() override;
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virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
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private:
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@ -393,7 +393,7 @@ WRITE8_MEMBER(mcr3_state::stargrds_op6_w)
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READ8_MEMBER(mcr3_state::spyhunt_ip1_r)
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{
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return ioport("ssio:IP1")->read() | (m_cheap_squeak_deluxe->read(space, 0) << 5);
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return ioport("ssio:IP1")->read() | (m_cheap_squeak_deluxe->stat_r(space, 0) << 5);
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}
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@ -437,7 +437,8 @@ WRITE8_MEMBER(mcr3_state::spyhunt_op4_w)
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m_last_op4 = data;
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/* low 5 bits go to control the Chip Squeak Deluxe */
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m_cheap_squeak_deluxe->write(space, offset, data);
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m_cheap_squeak_deluxe->sr_w(space, offset, data & 0x0f);
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m_cheap_squeak_deluxe->sirq_w(BIT(data, 4));
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}
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@ -45,8 +45,7 @@ public:
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m_videoram(*this, "videoram"),
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m_cheap_squeak_deluxe(*this, "csd"),
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m_bg_tilemap(nullptr),
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m_fg_tilemap(nullptr),
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m_sound_data(0)
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m_fg_tilemap(nullptr)
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{ }
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DECLARE_VIDEO_START(zwackery);
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@ -64,7 +63,6 @@ public:
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DECLARE_READ8_MEMBER(pia1_porta_r);
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DECLARE_WRITE8_MEMBER(pia1_porta_w);
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DECLARE_READ8_MEMBER(pia1_portb_r);
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DECLARE_WRITE_LINE_MEMBER(pia1_ca2_w);
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DECLARE_READ8_MEMBER(pia2_porta_r);
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DECLARE_READ8_MEMBER(ptm_r);
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@ -88,10 +86,9 @@ private:
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tilemap_t *m_fg_tilemap;
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std::unique_ptr<uint8_t[]> m_spriteram;
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std::unique_ptr<uint8_t[]> m_srcdata0;
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std::unique_ptr<uint8_t[]> m_srcdata2;
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uint8_t m_sound_data;
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};
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@ -406,12 +403,7 @@ GFXDECODE_END
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WRITE8_MEMBER( zwackery_state::pia1_porta_w )
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{
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m_sound_data = (data >> 4) & 0x0f;
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}
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WRITE_LINE_MEMBER( zwackery_state::pia1_ca2_w )
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{
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m_cheap_squeak_deluxe->write(machine().dummy_space(), 0, (state << 4) | m_sound_data);
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m_cheap_squeak_deluxe->sr_w(space, 0, data >> 4);
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}
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@ -486,7 +478,6 @@ void zwackery_state::machine_start()
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// register for save states
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save_pointer(NAME(m_spriteram.get()), 0x800);
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save_item(NAME(m_sound_data));
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}
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@ -499,6 +490,8 @@ static MACHINE_CONFIG_START( zwackery, zwackery_state )
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MCFG_CPU_ADD("maincpu", M68000, 7652400) // based on counter usage, should be XTAL_16MHz/2
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MCFG_CPU_PROGRAM_MAP(zwackery_map)
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MCFG_QUANTUM_PERFECT_CPU("maincpu")
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MCFG_WATCHDOG_ADD("watchdog")
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MCFG_DEVICE_ADD("ptm", PTM6840, 7652400 / 10)
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@ -514,7 +507,7 @@ static MACHINE_CONFIG_START( zwackery, zwackery_state )
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MCFG_PIA_READPA_HANDLER(READ8(zwackery_state, pia1_porta_r))
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MCFG_PIA_WRITEPA_HANDLER(WRITE8(zwackery_state, pia1_porta_w))
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MCFG_PIA_READPB_HANDLER(READ8(zwackery_state, pia1_portb_r))
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MCFG_PIA_CA2_HANDLER(WRITELINE(zwackery_state, pia1_ca2_w))
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MCFG_PIA_CA2_HANDLER(DEVWRITELINE("csd", midway_cheap_squeak_deluxe_device, sirq_w))
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MCFG_DEVICE_ADD("pia2", PIA6821, 0)
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MCFG_PIA_READPA_HANDLER(READ8(zwackery_state, pia2_porta_r))
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