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konmedal: add scc enable register

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This commit is contained in:
hap 2023-07-08 14:59:47 +02:00
parent 9945ff79de
commit ef6cb6efa1
2 changed files with 36 additions and 17 deletions
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12
src/devices/sound/k051649.cpp
View File

@ -12,16 +12,16 @@
waveform from RAM (32 bytes per waveform, 8 bit signed data).
This sound chip is the same as the sound chip in some Konami
megaROM cartridges for the MSX. It is actually well researched
and documented:
http://bifi.msxnet.org/msxnet/tech/scc.html
Thanks to Sean Young (sean@mess.org) for some bugfixes.
megaROM cartridges for the MSX. This device only emulates the
sound portion, not the memory mapper.
K052539 is more or less equivalent to this chip except channel 5
does not share waveram with channel 4.
References:
- http://bifi.msxnet.org/msxnet/tech/scc.html
- http://bifi.msxnet.org/msxnet/tech/soundcartridge
TODO:
- make K052539 a subdevice
- test register bits 0-4, not used in any software

41
src/mame/konami/konmedal.cpp
View File

@ -88,6 +88,7 @@ public:
m_k053252(*this, "k053252"),
m_k052109(*this, "k052109"),
m_palette(*this, "palette"),
m_scc_map(*this, "scc_map"),
m_ymz(*this, "ymz"),
m_oki(*this, "oki"),
m_upd7759(*this, "upd"),
@ -128,6 +129,7 @@ private:
uint8_t vram_r(offs_t offset);
void vram_w(offs_t offset, uint8_t data);
void bankswitch_w(uint8_t data);
void scc_enable_w(uint8_t data);
void control2_w(uint8_t data);
void medalcnt_w(uint8_t data);
void lamps_w(uint8_t data);
@ -161,6 +163,7 @@ private:
optional_device<k053252_device> m_k053252;
optional_device<k052109_device> m_k052109;
required_device<palette_device> m_palette;
memory_view m_scc_map;
optional_device<ymz280b_device> m_ymz;
optional_device<okim6295_device> m_oki;
optional_device<upd7759_device> m_upd7759;
@ -168,11 +171,14 @@ private:
required_ioport m_outport;
output_finder<8> m_lamps;
u8 m_control, m_control2, m_shuri_irq;
int m_ccu_int_time, m_ccu_int_time_count;
int m_avac;
int m_layer_colorbase[4];
int m_layer_order[4];
u8 m_control = 0;
u8 m_control2 = 0;
u8 m_shuri_irq = 0;
int m_ccu_int_time = 0;
int m_ccu_int_time_count = 0;;
int m_avac = 0;
int m_layer_colorbase[4] = { };
int m_layer_order[4] = { };
};
void konmedal_state::control2_w(uint8_t data)
@ -381,6 +387,16 @@ void konmedal_state::bankswitch_w(uint8_t data)
m_control = data & 0xf;
}
void konmedal_state::scc_enable_w(uint8_t data)
{
// SCC memory bank register 3, 0x3f to enable access to sound registers
// normally it's safe to ignore this register in arcade drivers, but in this case slimekun relies on it
if ((data & 0x3f) == 0x3f)
m_scc_map.select(0);
else
m_scc_map.disable();
}
void konmedal_state::medal_main(address_map &map)
{
map(0x0000, 0x7fff).rom().region("maincpu", 0);
@ -420,8 +436,9 @@ void konmedal_state::ddboy_main(address_map &map)
map(0xc703, 0xc703).portr("IN2");
map(0xc800, 0xc80f).rw(m_k053252, FUNC(k053252_device::read), FUNC(k053252_device::write));
map(0xcc00, 0xcc00).rw(m_oki, FUNC(okim6295_device::read), FUNC(okim6295_device::write));
map(0xd000, 0xd000).nopw(); // ??? writes 00 and 3f every frame
map(0xd800, 0xd8ff).m("k051649", FUNC(k051649_device::scc_map));
map(0xd000, 0xd000).mirror(0x07ff).w(FUNC(konmedal_state::scc_enable_w));
map(0xd800, 0xdfff).view(m_scc_map);
m_scc_map[0](0xd800, 0xd8ff).mirror(0x0700).m("k051649", FUNC(k051649_device::scc_map));
map(0xe000, 0xffff).rw(FUNC(konmedal_state::vram_r), FUNC(konmedal_state::vram_w));
}
@ -439,8 +456,9 @@ void konmedal_state::shuriboy_main(address_map &map)
map(0x8c00, 0x8c00).w(FUNC(konmedal_state::shuri_bank_w));
map(0x8d00, 0x8d00).w(m_upd7759, FUNC(upd7759_device::port_w));
map(0x8e00, 0x8e00).w(FUNC(konmedal_state::lamps_w));
map(0x9000, 0x9000).nopw(); // writes alternating 00 and 3F
map(0x9800, 0x98ff).m("k051649", FUNC(k051649_device::scc_map));
map(0x9000, 0x9000).mirror(0x07ff).w(FUNC(konmedal_state::scc_enable_w));
map(0x9800, 0x9fff).view(m_scc_map);
m_scc_map[0](0x9800, 0x98ff).mirror(0x0700).m("k051649", FUNC(k051649_device::scc_map));
map(0xa000, 0xbfff).bankr("bank1");
map(0xc000, 0xffff).rw(m_k052109, FUNC(k052109_device::read), FUNC(k052109_device::write));
map(0xdd00, 0xdd00).rw(FUNC(konmedal_state::shuri_irq_r), FUNC(konmedal_state::shuri_irq_w));
@ -797,7 +815,9 @@ MACHINE_START_MEMBER(konmedal_state, shuriboy)
void konmedal_state::machine_reset()
{
m_control = m_control2 = m_shuri_irq = 0;
m_control = 0;
m_control2 = 0;
m_shuri_irq = 0;
m_ccu_int_time_count = 0;
m_ccu_int_time = 31;
m_avac = 0;
@ -973,7 +993,6 @@ TIMER_DEVICE_CALLBACK_MEMBER(konmedal_state::shuri_scanline)
if ((scanline == 240) && (m_shuri_irq & 0x4))
{
m_maincpu->set_input_line(0, ASSERT_LINE);
}
if ((scanline == 255) && (m_shuri_irq & 0x1))