summaryrefslogtreecommitdiffstatshomepage
diff options
context:
space:
mode:
author cam900 <dbtlrchl@naver.com>2020-09-13 17:45:42 +0900
committer Vas Crabb <cuavas@users.noreply.github.com>2020-09-13 18:51:53 +1000
commit612bf6546f096b92e5bd028813c99fa54e1604e1 (patch)
tree063d7270005a4c2e6628404565066d1941e939e6
parent59ff79f394461e37bc08a3321509d070b8e0ba4a (diff)
Device-fied PRO-CT0
for protection, aka ALPHA-8921(in Some later 80s alpha denshi PCBs) or SNK-9201 prot_fatfury2.cpp: Convert protection into alpha_8921.cpp device
-rw-r--r--scripts/src/machine.lua11
-rw-r--r--scripts/target/mame/arcade.lua1
-rw-r--r--scripts/target/mame/mess.lua1
-rw-r--r--src/devices/bus/neogeo/prot_fatfury2.cpp86
-rw-r--r--src/devices/bus/neogeo/prot_fatfury2.h6
-rw-r--r--src/devices/machine/alpha_8921.cpp213
-rw-r--r--src/devices/machine/alpha_8921.h85
7 files changed, 340 insertions, 63 deletions
diff --git a/scripts/src/machine.lua b/scripts/src/machine.lua
index a4751370c7d..600c22f2746 100644
--- a/scripts/src/machine.lua
+++ b/scripts/src/machine.lua
@@ -4535,3 +4535,14 @@ if (MACHINES["SWIM3"]~=null) then
MAME_DIR .. "src/devices/machine/swim3.h",
}
end
+
+---------------------------------------------------
+--
+--@src/devices/machine/alpha_8921.h,MACHINES["ALPHA_8921"] = true
+---------------------------------------------------
+if (MACHINES["ALPHA_8921"]~=null) then
+ files {
+ MAME_DIR .. "src/devices/machine/alpha_8921.cpp",
+ MAME_DIR .. "src/devices/machine/alpha_8921.h",
+ }
+end
diff --git a/scripts/target/mame/arcade.lua b/scripts/target/mame/arcade.lua
index 1a295e77378..3ecc8b0f72f 100644
--- a/scripts/target/mame/arcade.lua
+++ b/scripts/target/mame/arcade.lua
@@ -388,6 +388,7 @@ VIDEOS["VRENDER0"] = true
MACHINES["ACORN_VIDC"] = true
MACHINES["AKIKO"] = true
+MACHINES["ALPHA_8921"] = true
--MACHINES["AM2901B"] = true
MACHINES["ARM_IOMD"] = true
MACHINES["AUTOCONFIG"] = true
diff --git a/scripts/target/mame/mess.lua b/scripts/target/mame/mess.lua
index 879f722a883..e01532fb463 100644
--- a/scripts/target/mame/mess.lua
+++ b/scripts/target/mame/mess.lua
@@ -426,6 +426,7 @@ VIDEOS["BT431"] = true
--------------------------------------------------
MACHINES["AKIKO"] = true
+MACHINES["ALPHA_8921"] = true
MACHINES["AM2901B"] = true
MACHINES["AUTOCONFIG"] = true
MACHINES["BUSMOUSE"] = true
diff --git a/src/devices/bus/neogeo/prot_fatfury2.cpp b/src/devices/bus/neogeo/prot_fatfury2.cpp
index bd7af9247db..c8e7151e6e8 100644
--- a/src/devices/bus/neogeo/prot_fatfury2.cpp
+++ b/src/devices/bus/neogeo/prot_fatfury2.cpp
@@ -11,14 +11,18 @@ DEFINE_DEVICE_TYPE(NG_FATFURY2_PROT, fatfury2_prot_device, "ng_fatfury_prot", "N
fatfury2_prot_device::fatfury2_prot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
device_t(mconfig, NG_FATFURY2_PROT, tag, owner, clock),
- m_prot_data(0)
+ m_pro_ct0(*this, "pro_ct0")
{
}
+void fatfury2_prot_device::device_add_mconfig(machine_config &config)
+{
+ ALPHA_8921(config, m_pro_ct0, 0); // PRO-CT0 or SNK-9201
+}
+
void fatfury2_prot_device::device_start()
{
- save_item(NAME(m_prot_data));
}
void fatfury2_prot_device::device_reset()
@@ -33,69 +37,27 @@ void fatfury2_prot_device::device_reset()
/* 0x2xxxxx range. There are several checks all around the code. */
uint16_t fatfury2_prot_device::protection_r(offs_t offset)
{
- uint16_t res = m_prot_data >> 24;
-
- switch (offset)
- {
- case 0x55550/2:
- case 0xffff0/2:
- case 0x00000/2:
- case 0xff000/2:
- case 0x36000/2:
- case 0x36008/2:
- return res;
-
- case 0x36004/2:
- case 0x3600c/2:
- return ((res & 0xf0) >> 4) | ((res & 0x0f) << 4);
-
- default:
- logerror("unknown protection read at %s, offset %08x\n", machine().describe_context(), offset << 1);
- return 0;
- }
+ m_pro_ct0->even_w(BIT(offset, 1));
+ m_pro_ct0->h_w(BIT(offset, 2));
+ u8 gad = m_pro_ct0->gad_r();
+ u8 gbd = m_pro_ct0->gbd_r();
+ return (BIT(gbd, 0, 2) << 6) | (BIT(gbd, 2, 2) << 4) | (BIT(gad, 0, 2) << 6) | (BIT(gad, 2, 2) << 4);
}
void fatfury2_prot_device::protection_w(offs_t offset, uint16_t data)
{
- switch (offset)
- {
- case 0x11112/2: /* data == 0x1111; expects 0xff000000 back */
- m_prot_data = 0xff000000;
- break;
-
- case 0x33332/2: /* data == 0x3333; expects 0x0000ffff back */
- m_prot_data = 0x0000ffff;
- break;
-
- case 0x44442/2: /* data == 0x4444; expects 0x00ff0000 back */
- m_prot_data = 0x00ff0000;
- break;
-
- case 0x55552/2: /* data == 0x5555; read back from 55550, ffff0, 00000, ff000 */
- m_prot_data = 0xff00ff00;
- break;
-
- case 0x56782/2: /* data == 0x1234; read back from 36000 *or* 36004 */
- m_prot_data = 0xf05a3601;
- break;
-
- case 0x42812/2: /* data == 0x1824; read back from 36008 *or* 3600c */
- m_prot_data = 0x81422418;
- break;
-
- case 0x55550/2:
- case 0xffff0/2:
- case 0xff000/2:
- case 0x36000/2:
- case 0x36004/2:
- case 0x36008/2:
- case 0x3600c/2:
- m_prot_data <<= 8;
- break;
-
- default:
- logerror("unknown protection write at %s, offset %08x, data %02x\n", machine().describe_context(), offset, data);
- break;
- }
+ // /PORTOEL connected into PRO-CT0 CLK pin
+ m_pro_ct0->clk_w(true);
+
+ m_pro_ct0->load_w(BIT(offset, 0)); // A1
+ m_pro_ct0->even_w(BIT(offset, 1)); // A2
+ m_pro_ct0->h_w(BIT(offset, 2)); // A3
+
+ // C16-31 = A4-A19, C0-C15 = D0-D15
+ m_pro_ct0->c_w((u32(bitswap<16>(BIT(offset, 3, 16), 15, 13, 11, 9, 14, 12, 10, 8, 7, 5, 3, 1, 6, 4, 2, 0)) << 16) |
+ bitswap<16>(data, 15, 13, 11, 9, 14, 12, 10, 8, 7, 5, 3, 1, 6, 4, 2, 0));
+
+ // release /PORTOEL
+ m_pro_ct0->clk_w(false);
}
diff --git a/src/devices/bus/neogeo/prot_fatfury2.h b/src/devices/bus/neogeo/prot_fatfury2.h
index 111b9f7388b..1cab87cb26a 100644
--- a/src/devices/bus/neogeo/prot_fatfury2.h
+++ b/src/devices/bus/neogeo/prot_fatfury2.h
@@ -6,6 +6,8 @@
#pragma once
+#include "machine/alpha_8921.h"
+
DECLARE_DEVICE_TYPE(NG_FATFURY2_PROT, fatfury2_prot_device)
@@ -19,10 +21,12 @@ public:
void protection_w(offs_t offset, uint16_t data);
protected:
+ virtual void device_add_mconfig(machine_config &config) override;
virtual void device_start() override;
virtual void device_reset() override;
- uint32_t m_prot_data;
+private:
+ required_device<alpha_8921_device> m_pro_ct0; // PRO-CT0 or SNK-9201
};
#endif // MAME_BUS_NEOGEO_PROT_FATFURY2_H
diff --git a/src/devices/machine/alpha_8921.cpp b/src/devices/machine/alpha_8921.cpp
new file mode 100644
index 00000000000..1157b061f28
--- /dev/null
+++ b/src/devices/machine/alpha_8921.cpp
@@ -0,0 +1,213 @@
+// license:BSD-3-Clause
+// copyright-holders:cam900
+/***************************************************************************
+
+ Alpha denshi ALPHA-8921 emulation
+
+ Also known as
+ SNK PRO-CT0
+ SNK-9201
+
+ This chip is sprite ROM data serializer, or optional security device.
+ used in some later 80s Alpha Denshi hardware(ex: Gang Wars),
+ Some early Neogeo MVS motherboards, AES cartridges.
+ also integrated in NEO-ZMC2, NEO-CMC.
+
+ reference: https://wiki.neogeodev.org/index.php?title=PRO-CT0
+
+***************************************************************************/
+
+#include "emu.h"
+#include "alpha_8921.h"
+#include <algorithm>
+
+
+//**************************************************************************
+// GLOBAL VARIABLES
+//**************************************************************************
+
+// device type definition
+DEFINE_DEVICE_TYPE(ALPHA_8921, alpha_8921_device, "alpha_8921", "Alpha denshi ALPHA-8921")
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// alpha_8921_device - constructor
+//-------------------------------------------------
+
+alpha_8921_device::alpha_8921_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : device_t(mconfig, ALPHA_8921, tag, owner, clock)
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void alpha_8921_device::device_start()
+{
+ // save states
+ save_item(NAME(m_clk));
+ save_item(NAME(m_load));
+ save_item(NAME(m_even));
+ save_item(NAME(m_h));
+ save_item(NAME(m_c));
+ save_item(NAME(m_gad));
+ save_item(NAME(m_gbd));
+ save_item(NAME(m_dota));
+ save_item(NAME(m_dotb));
+ save_item(NAME(m_sr));
+ save_item(NAME(m_old_sr));
+ save_item(NAME(m_old_even));
+ save_item(NAME(m_old_h));
+}
+
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void alpha_8921_device::device_reset()
+{
+ // force update outputs
+ m_old_sr = ~m_sr;
+ m_old_even = !m_even;
+ m_old_h = !m_h;
+ update_output();
+}
+
+
+//**************************************************************************
+// READ/WRITE HANDLERS
+//**************************************************************************
+
+//-------------------------------------------------
+// clk_w - Change clock pin status
+//-------------------------------------------------
+
+WRITE_LINE_MEMBER(alpha_8921_device::clk_w)
+{
+ if (m_clk != state)
+ {
+ m_clk = state;
+ if (!m_clk) // falling edge
+ {
+ if (m_load)
+ m_sr = m_c;
+ else if (m_h)
+ m_sr = (BIT(m_sr, 24, 6) << 26) | (BIT(m_sr, 16, 6) << 18) | (BIT(m_sr, 8, 6) << 10) | (BIT(m_sr, 0, 6) << 2);
+ else
+ m_sr = ((BIT(m_sr, 26, 6)) << 24) | ((BIT(m_sr, 18, 6)) << 16) | ((BIT(m_sr, 10, 6)) << 8) | (BIT(m_sr, 2, 6));
+ }
+ }
+}
+
+//-------------------------------------------------
+// load_w - Change LOAD pin status
+//-------------------------------------------------
+
+WRITE_LINE_MEMBER(alpha_8921_device::load_w)
+{
+ m_load = state;
+}
+
+//-------------------------------------------------
+// even_w - Change EVEN pin status
+//-------------------------------------------------
+
+WRITE_LINE_MEMBER(alpha_8921_device::even_w)
+{
+ m_even = state;
+}
+
+//-------------------------------------------------
+// h_w - Change H pin status
+//-------------------------------------------------
+
+WRITE_LINE_MEMBER(alpha_8921_device::h_w)
+{
+ m_h = state;
+}
+
+//-------------------------------------------------
+// c_w - Change C data
+//-------------------------------------------------
+
+void alpha_8921_device::c_w(u32 data)
+{
+ m_c = data;
+}
+
+//-------------------------------------------------
+// update_output - Update output results
+//-------------------------------------------------
+
+void alpha_8921_device::update_output()
+{
+ if ((m_old_sr != m_sr) || (m_old_even != m_even) || (m_old_h != m_h))
+ {
+ switch (m_h)
+ {
+ case 1:
+ m_gbd = bitswap<4>(m_sr, 30, 22, 14, 6);
+ m_gad = bitswap<4>(m_sr, 31, 23, 15, 7);
+ break;
+ case 0:
+ m_gbd = bitswap<4>(m_sr, 25, 17, 9, 1);
+ m_gad = bitswap<4>(m_sr, 24, 16, 8, 0);
+ break;
+ }
+ if (m_even)
+ std::swap<u8>(m_gad, m_gbd);
+
+ m_dota = m_gad ? true : false;
+ m_dotb = m_gbd ? true : false;
+ m_old_sr = m_sr;
+ m_old_even = m_even;
+ m_old_h = m_h;
+ }
+}
+
+//-------------------------------------------------
+// gad_r - Read GAD data
+//-------------------------------------------------
+
+u8 alpha_8921_device::gad_r()
+{
+ update_output();
+ return m_gad & 0xf;
+}
+
+//-------------------------------------------------
+// gbd_r - Read GBD data
+//-------------------------------------------------
+
+u8 alpha_8921_device::gbd_r()
+{
+ update_output();
+ return m_gbd & 0xf;
+}
+
+//-------------------------------------------------
+// dota_r - Read DOTA pin data (GAD isn't 0)
+//-------------------------------------------------
+
+READ_LINE_MEMBER(alpha_8921_device::dota_r)
+{
+ update_output();
+ return m_dota;
+}
+
+//-------------------------------------------------
+// dotb_r - Read DOTB pin data (GBD isn't 0)
+//-------------------------------------------------
+
+READ_LINE_MEMBER(alpha_8921_device::dotb_r)
+{
+ update_output();
+ return m_dotb;
+}
diff --git a/src/devices/machine/alpha_8921.h b/src/devices/machine/alpha_8921.h
new file mode 100644
index 00000000000..1dd690581cb
--- /dev/null
+++ b/src/devices/machine/alpha_8921.h
@@ -0,0 +1,85 @@
+// license:BSD-3-Clause
+// copyright-holders:cam900
+/***************************************************************************
+
+ Alpha denshi ALPHA-8921 emulation
+
+***************************************************************************/
+
+#ifndef MAME_MACHINE_ALPHA_8921_H
+#define MAME_MACHINE_ALPHA_8921_H
+
+#pragma once
+
+
+
+//**************************************************************************
+// INTERFACE CONFIGURATION MACROS
+//**************************************************************************
+
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> alpha_8921_device
+
+class alpha_8921_device : public device_t
+{
+public:
+ // construction/destruction
+ alpha_8921_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+ // inputs
+ DECLARE_WRITE_LINE_MEMBER(clk_w);
+ DECLARE_WRITE_LINE_MEMBER(load_w);
+ DECLARE_WRITE_LINE_MEMBER(even_w);
+ DECLARE_WRITE_LINE_MEMBER(h_w);
+ void c_w(u32 data);
+
+ // outputs
+ u8 gad_r();
+ u8 gbd_r();
+ DECLARE_READ_LINE_MEMBER(dota_r);
+ DECLARE_READ_LINE_MEMBER(dotb_r);
+
+protected:
+ // device-level overrides
+ virtual void device_start() override;
+ virtual void device_reset() override;
+
+private:
+ // inputs
+ bool m_clk = false; // CLK pin
+ bool m_load = false; // LOAD pin
+ bool m_even = false; // EVEN pin
+ bool m_h = false; // H pin
+ u32 m_c = 0; // C data (32 bit)
+
+ // outputs
+ u8 m_gad = 0; // GAD data (4 bit)
+ u8 m_gbd = 0; // GBD data (4 bit)
+ bool m_dota = false; // DOTA pin
+ bool m_dotb = false; // DOTB pin
+
+ // internal status
+ u32 m_sr = 0;
+ u32 m_old_sr = ~0;
+ bool m_old_even = true;
+ bool m_old_h = true;
+ void update_output();
+};
+
+
+// device type definition
+DECLARE_DEVICE_TYPE(ALPHA_8921, alpha_8921_device)
+
+
+
+//**************************************************************************
+// GLOBAL VARIABLES
+//**************************************************************************
+
+
+#endif // MAME_MACHINE_ALPHA_8921_H