diff options
Diffstat (limited to 'src/devices/bus/neogeo/prot_fatfury2.cpp')
-rw-r--r-- | src/devices/bus/neogeo/prot_fatfury2.cpp | 100 |
1 files changed, 36 insertions, 64 deletions
diff --git a/src/devices/bus/neogeo/prot_fatfury2.cpp b/src/devices/bus/neogeo/prot_fatfury2.cpp index 418c49ff4cd..d28b417b33d 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() @@ -31,71 +35,39 @@ void fatfury2_prot_device::device_reset() /* the protection involves reading and writing addresses in the */ /* 0x2xxxxx range. There are several checks all around the code. */ -READ16_MEMBER( fatfury2_prot_device::protection_r ) +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(); + /* + Data pin from PRO-CT0 + D0 D1 D2 D3 D4 D5 D6 D7 + GAD2 GAD3 GAD0 GAD1 GBD2 GBD3 GBD0 GBD1 + */ + return (BIT(gbd, 0, 2) << 6) | (BIT(gbd, 2, 2) << 4) | (BIT(gad, 0, 2) << 2) | (BIT(gad, 2, 2) << 0); } -WRITE16_MEMBER( fatfury2_prot_device::protection_w ) +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 + /* + Address/Data pin mapping into PRO-CT0 + C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 LOAD EVEN H + D0 D4 D1 D5 D2 D6 D3 D7 D8 D12 D9 D13 D10 D14 D11 D15 A4 A8 A5 A9 A6 A10 A7 A11 A12 A16 A13 A17 A14 A18 A15 A19 A1 A2 A3 + */ + m_pro_ct0->c_w((u32(bitswap<16>(BIT(offset, 3, 16), 15, 11, 14, 10, 13, 9, 12, 8, 7, 3, 6, 2, 5, 1, 4, 0)) << 16) | + u32(bitswap<16>(data, 15, 11, 14, 10, 13, 9, 12, 8, 7, 3, 6, 2, 5, 1, 4, 0))); + + // release /PORTOEL + m_pro_ct0->clk_w(false); } |