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author etabeta78 <doge.fabio@gmail.com>2016-04-28 11:20:54 +0200
committer etabeta78 <doge.fabio@gmail.com>2016-04-28 11:20:54 +0200
commit152440672108133e5e065e5777bb3672fac4aaae (patch)
tree6a125eee10b7410bf9bd4367829687e379809617 /src/mame/drivers/neogeocd.cpp
parent923539399b66be1a0412f5b957c27668a8492a67 (diff)
misc clean up. nw.
Diffstat (limited to 'src/mame/drivers/neogeocd.cpp')
-rw-r--r--src/mame/drivers/neogeocd.cpp1148
1 files changed, 1148 insertions, 0 deletions
diff --git a/src/mame/drivers/neogeocd.cpp b/src/mame/drivers/neogeocd.cpp
new file mode 100644
index 00000000000..323e3b326f7
--- /dev/null
+++ b/src/mame/drivers/neogeocd.cpp
@@ -0,0 +1,1148 @@
+// license:BSD-3-Clause
+// copyright-holders:Bryan McPhail,Ernesto Corvi,Andrew Prime,Zsolt Vasvari
+// thanks-to:Fuzz
+/***************************************************************************
+
+ Neo-Geo CD hardware
+
+ Thanks to:
+ * The FBA team (Barry Harris) for much of the CDC / CDD code and system details.
+ ( http://www.barryharris.me.uk/ )
+ * Mirko Buffoni for a commented disassembly of the NeoCD bios rom.
+
+ Current status:
+ - NeoCDZ runs, the original NeoCD does not
+ - Might think the tray is open? (check)
+ - Some unknown / unhandled CD commands, code is still a bit messy
+ - CDDA continues to play during loading, should stop it
+ - Games using Raster Effects are broken without a kludge
+ - CPU gets overloaded with IRQs from the timer callback...
+ - Double Dragon doesn't load, it erases the IRQ table
+ - might need better handling of the Vector Table Mapping, or better interrupts (see point above)
+ - Softlist are based on an old Tosec set and should be updated to the TruRip set once we can convert CCD
+ without throwing away gap data etc.
+
+****************************************************************************/
+
+#include "emu.h"
+#include "includes/neogeo.h"
+#include "machine/nvram.h"
+#include "imagedev/chd_cd.h"
+#include "sound/cdda.h"
+#include "machine/megacdcd.h"
+#include "softlist.h"
+
+
+/* Stubs for various functions called by the FBA code, replace with MAME specifics later */
+
+UINT8 *NeoSpriteRAM, *NeoTextRAM;
+//UINT8* NeoSpriteROM;
+//UINT8* NeoTextROM;
+UINT8* YM2610ADPCMAROM;
+UINT8* NeoZ80ROMActive;
+
+// was it actually released in eu / asia?
+#define NEOCD_REGION_ASIA 3 // IronClad runs with a darkened screen (MVS has the same issue)
+#define NEOCD_REGION_EUROPE 2 // ^
+#define NEOCD_REGION_US 1
+#define NEOCD_REGION_JAPAN 0
+
+
+UINT8 NeoSystem = NEOCD_REGION_JAPAN;
+
+
+class ngcd_state : public aes_state
+{
+public:
+ ngcd_state(const machine_config &mconfig, device_type type, const char *tag)
+ : aes_state(mconfig, type, tag)
+ , m_tempcdc(*this,"tempcdc")
+ {
+ NeoCDDMAAddress1 = 0;
+ NeoCDDMAAddress2 = 0;
+ NeoCDDMAValue1 = 0;
+ NeoCDDMAValue2 = 0;
+ NeoCDDMACount = 0;
+ NeoCDDMAMode = 0;
+ nIRQAcknowledge = ~0;
+ nNeoCDIRQVectorAck = 0;
+ nNeoCDIRQVector = 0;
+ m_has_sprite_bus = true;
+ m_has_text_bus = true;
+ m_has_ymrom_bus = true;
+ m_has_z80_bus = true;
+ }
+
+ optional_device<lc89510_temp_device> m_tempcdc;
+
+
+ void NeoCDDoDMA(address_space& curr_space);
+ void set_DMA_regs(int offset, UINT16 wordValue);
+
+ DECLARE_READ16_MEMBER(neocd_memcard_r);
+ DECLARE_WRITE16_MEMBER(neocd_memcard_w);
+ DECLARE_READ16_MEMBER(neocd_control_r);
+ DECLARE_WRITE16_MEMBER(neocd_control_w);
+ DECLARE_READ8_MEMBER(neocd_transfer_r);
+ DECLARE_WRITE8_MEMBER(neocd_transfer_w);
+
+ DECLARE_INPUT_CHANGED_MEMBER(aes_jp1);
+
+ DECLARE_MACHINE_START(neocd);
+ DECLARE_MACHINE_RESET(neocd);
+
+ // neoCD
+
+ INT32 nActiveTransferArea;
+ INT32 nSpriteTransferBank;
+ INT32 nADPCMTransferBank;
+ INT32 NeoCDDMAAddress1;
+ INT32 NeoCDDMAAddress2;
+ INT32 NeoCDDMAValue1;
+ INT32 NeoCDDMAValue2;
+ INT32 NeoCDDMACount;
+ INT32 NeoCDDMAMode;
+ INT32 nIRQAcknowledge;
+ int nNeoCDIRQVectorAck;
+ int nNeoCDIRQVector;
+
+ bool m_has_sprite_bus;
+ bool m_has_text_bus;
+ bool m_has_ymrom_bus;
+ bool m_has_z80_bus;
+
+ int get_nNeoCDIRQVectorAck(void) { return nNeoCDIRQVectorAck; }
+ void set_nNeoCDIRQVectorAck(int val) { nNeoCDIRQVectorAck = val; }
+ int get_nNeoCDIRQVector(void) { return nNeoCDIRQVector; }
+ void NeoCDIRQUpdate(UINT8 byteValue);
+
+ // from the CDC
+ void interrupt_callback_type1(void);
+ void interrupt_callback_type2(void);
+ void interrupt_callback_type3(void);
+
+ UINT8 nTransferWriteEnable;
+
+ bool prohibit_cdc_irq; // hack?
+
+ UINT32 screen_update_neocd(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
+
+ DECLARE_DRIVER_INIT(neocdz);
+ DECLARE_DRIVER_INIT(neocdzj);
+
+ IRQ_CALLBACK_MEMBER(neocd_int_callback);
+
+ std::unique_ptr<UINT8[]> m_meminternal_data;
+protected:
+
+ INT32 SekIdle(INT32 nCycles);
+};
+
+
+
+/*************************************
+ *
+ * Memory card
+ *
+ *************************************/
+
+#define MEMCARD_SIZE 0x0800
+
+
+/* The NeoCD has an 8kB internal memory card, instead of memcard slots like the MVS and AES */
+READ16_MEMBER(ngcd_state::neocd_memcard_r)
+{
+ return m_meminternal_data[offset] | 0xff00;
+}
+
+
+WRITE16_MEMBER(ngcd_state::neocd_memcard_w)
+{
+ if (ACCESSING_BITS_0_7)
+ {
+ m_meminternal_data[offset] = data;
+ }
+}
+
+
+/*************************************
+ *
+ * System control register
+ *
+ *************************************/
+
+READ16_MEMBER(ngcd_state::neocd_control_r)
+{
+ UINT32 sekAddress = 0xff0000+ (offset*2);
+
+ switch (sekAddress & 0xFFFF) {
+ case 0x0016:
+ return m_tempcdc->nff0016_r();
+
+ // LC8951 registers
+ case 0x0100:
+ return m_tempcdc->segacd_cdc_mode_address_r(space, 0, 0xffff);
+ case 0x0102:
+ return m_tempcdc->CDC_Reg_r();
+
+ // CD mechanism communication
+ case 0x0160:
+ return m_tempcdc->neocd_cdd_rx_r();
+
+ case 0x011C: // region
+ return ~((0x10 | (NeoSystem & 3)) << 8);
+ }
+
+
+// bprintf(PRINT_NORMAL, _T(" - NGCD port 0x%06X read (word, PC: 0x%06X)\n"), sekAddress, SekGetPC(-1));
+
+ return ~0;
+}
+
+
+WRITE16_MEMBER(ngcd_state::neocd_control_w)
+{
+ UINT32 sekAddress = 0xff0000+ (offset*2);
+ UINT16 wordValue = data;
+
+// bprintf(PRINT_NORMAL, _T(" - NGCD port 0x%06X -> 0x%04X (PC: 0x%06X)\n"), sekAddress, wordValue, SekGetPC(-1));
+ int byteValue = wordValue & 0xff;
+
+ switch (sekAddress & 0xFFFE) {
+ case 0x0002:
+
+ m_tempcdc->nff0002_set(wordValue);
+
+ break;
+
+ case 0x000E:
+ NeoCDIRQUpdate(wordValue); // irqack
+ break;
+
+ case 0x0016:
+ m_tempcdc->nff0016_set(byteValue);
+ break;
+
+ // DMA controller
+ case 0x0060:
+ if (byteValue & 0x40) {
+ NeoCDDoDMA(space);
+ }
+ break;
+
+ case 0x0064:
+ case 0x0066:
+ case 0x0068:
+ case 0x006A:
+ case 0x006C:
+ case 0x006E:
+ case 0x0070:
+ case 0x0072:
+ case 0x007E:
+ set_DMA_regs(sekAddress & 0xFFFE, wordValue);
+ break;
+
+ // upload DMA controller program
+
+ case 0x0080:
+ case 0x0082:
+ case 0x0084:
+ case 0x0086:
+ case 0x0088:
+ case 0x008A:
+ case 0x008C:
+ case 0x008E:
+// bprintf(PRINT_NORMAL, _T(" - DMA controller program[%02i] -> 0x%04X (PC: 0x%06X)\n"), sekAddress & 0x0F, wordValue, SekGetPC(-1));
+ break;
+
+ // LC8951 registers
+ case 0x0100:
+ m_tempcdc->segacd_cdc_mode_address_w(space, 0, byteValue, 0xffff);
+ break;
+ case 0x0102:
+ m_tempcdc->CDC_Reg_w(byteValue);
+ break;
+
+ case 0x0104:
+// bprintf(PRINT_NORMAL, _T(" - NGCD 0xE00000 area -> 0x%02X (PC: 0x%06X)\n"), byteValue, SekGetPC(-1));
+ if (ACCESSING_BITS_0_7)
+ {
+ nActiveTransferArea = byteValue;
+ }
+ break;
+
+ case 0x0120:
+// bprintf(PRINT_NORMAL, _T(" - NGCD OBJ BUSREQ -> 1 (PC: 0x%06X)\n"), SekGetPC(-1));
+ m_has_sprite_bus = false;
+ break;
+ case 0x0122:
+// bprintf(PRINT_NORMAL, _T(" - NGCD PCM BUSREQ -> 1 (PC: 0x%06X) %x\n"), SekGetPC(-1), byteValue);
+ m_has_ymrom_bus = false;
+ break;
+ case 0x0126:
+// bprintf(PRINT_NORMAL, _T(" - NGCD Z80 BUSREQ -> 1 (PC: 0x%06X)\n"), SekGetPC(-1));
+ m_has_z80_bus = false;
+ space.machine().scheduler().synchronize();
+ m_audiocpu->set_input_line(INPUT_LINE_HALT, ASSERT_LINE);
+ break;
+ case 0x0128:
+// bprintf(PRINT_NORMAL, _T(" - NGCD FIX BUSREQ -> 1 (PC: 0x%06X)\n"), SekGetPC(-1));
+ m_has_text_bus = false;
+ break;
+ case 0x0140:
+// bprintf(PRINT_NORMAL, _T(" - NGCD OBJ BUSREQ -> 0 (PC: 0x%06X)\n"), SekGetPC(-1));
+ m_has_sprite_bus = true;
+ m_sprgen->optimize_sprite_data();
+ break;
+ case 0x0142:
+// bprintf(PRINT_NORMAL, _T(" - NGCD PCM BUSREQ -> 0 (PC: 0x%06X)\n"), SekGetPC(-1));
+ m_has_ymrom_bus = true;
+ break;
+ case 0x0146:
+// bprintf(PRINT_NORMAL, _T(" - NGCD Z80 BUSREQ -> 0 (PC: 0x%06X)\n"), SekGetPC(-1));
+ m_has_z80_bus = true;
+ space.machine().scheduler().synchronize();
+ m_audiocpu->set_input_line(INPUT_LINE_HALT, CLEAR_LINE);
+ break;
+ case 0x0148:
+// bprintf(PRINT_NORMAL, _T(" - NGCD FIX BUSREQ -> 0 (PC: 0x%06X)\n"), SekGetPC(-1));
+ m_has_text_bus = true;
+ break;
+
+ // CD mechanism communication
+ case 0x0162:
+ m_tempcdc->neocd_cdd_tx_w(byteValue);
+ break;
+ case 0x0164:
+ m_tempcdc->NeoCDCommsControl(byteValue & 1, byteValue & 2);
+ break;
+
+ case 0x016c:
+// bprintf(PRINT_ERROR, _T(" - NGCD port 0x%06X -> 0x%02X (PC: 0x%06X)\n"), sekAddress, byteValue, SekGetPC(-1));
+ //MapVectorTable(!(byteValue == 0xFF));
+ if (ACCESSING_BITS_0_7)
+ {
+ // even like this doubledr ends up mapping vectors in, then erasing them causing the loading to crash??
+ // is there some way to enable write protection on the RAM vector area or is it some IRQ masking issue?
+ // the games still write to the normal address for this too?
+ // writes 00 / 01 / ff
+ printf("MapVectorTable? %04x %04x\n",data,mem_mask);
+
+ //m_bank_vectors->set_entry(data == 0 ? 0 : 1);
+ m_use_cart_vectors = (data == 0 ? 0 : 1);
+ }
+
+//extern INT32 bRunPause;
+//bRunPause = 1;
+ break;
+
+ case 0x016e:
+// bprintf(PRINT_IMPORTANT, _T(" - NGCD 0xE00000 area write access %s (0x%02X, PC: 0x%06X)\n"), byteValue ? _T("enabled") : _T("disabled"), byteValue, SekGetPC(-1));
+
+ nTransferWriteEnable = byteValue;
+ break;
+
+ case 0x0180: {
+ // 1 during CD access, 0 otherwise, written frequently
+ //printf("reset cdc %04x %04x\n",data, mem_mask);
+
+ if (ACCESSING_BITS_0_7)
+ {
+ if (data==0x00)
+ {
+ // not a good idea, causes hangs
+ // m_tempcdc->NeoCDCommsReset();
+
+ // I doubt this is correct either, but we need something to stop
+ // the interrupts during gameplay and I'm not sure what...
+ prohibit_cdc_irq = true;
+ }
+ else
+ {
+ prohibit_cdc_irq = false;
+ }
+ }
+ break;
+ }
+ case 0x0182: {
+ // printf("blah %02x\n", byteValue);
+ if (byteValue == 0x00)
+ {
+ machine().device("ymsnd")->reset();
+ m_audiocpu->set_input_line(INPUT_LINE_RESET, ASSERT_LINE);
+ }
+ else m_audiocpu->set_input_line(INPUT_LINE_RESET, CLEAR_LINE);
+
+ break;
+ }
+ case 0x01A0:
+ nSpriteTransferBank = (byteValue & 3) << 20;
+ break;
+ case 0x01A2:
+ nADPCMTransferBank = (byteValue & 1) << 19;
+ break;
+
+
+ default: {
+// bprintf(PRINT_NORMAL, _T(" - NGCD port 0x%06X -> 0x%04X (PC: 0x%06X)\n"), sekAddress, wordValue, SekGetPC(-1));
+ }
+ }
+
+}
+
+
+
+
+/*
+ * Handling NeoCD banked RAM
+ * When the Z80 space is banked in to 0xe00000, only the low byte of each word is used
+ */
+
+
+READ8_MEMBER(ngcd_state::neocd_transfer_r)
+{
+ UINT32 sekAddress = 0xe00000+ (offset);
+ int address;
+ sekAddress ^= 1;
+
+ switch (nActiveTransferArea) {
+ case 0: // Sprites
+ address = (nSpriteTransferBank + (sekAddress & 0x0FFFFF));
+
+ // address is swizzled a bit due to out sprite decoding
+ if ((address&3)==0) return NeoSpriteRAM[address];
+ if ((address&3)==1) return NeoSpriteRAM[address^3];
+ if ((address&3)==2) return NeoSpriteRAM[address^3];
+ if ((address&3)==3) return NeoSpriteRAM[address];
+
+ return NeoSpriteRAM[nSpriteTransferBank + (sekAddress & 0x0FFFFF)];
+ case 1: // ADPCM
+ return YM2610ADPCMAROM[nADPCMTransferBank + ((sekAddress & 0x0FFFFF) >> 1)];
+ case 4: // Z80
+ if ((sekAddress & 0xfffff) >= 0x20000) return ~0;
+ return NeoZ80ROMActive[(sekAddress & 0x1FFFF) >> 1];
+ case 5: // Text
+ return NeoTextRAM[(sekAddress & 0x3FFFF) >> 1];
+ }
+
+ return ~0;
+
+}
+
+WRITE8_MEMBER(ngcd_state::neocd_transfer_w)
+{
+ UINT8 byteValue = data;
+ UINT32 sekAddress = 0xe00000+ (offset);
+
+ if (!nTransferWriteEnable) {
+// return;
+ }
+ int address;
+
+ sekAddress ^= 1;
+
+ switch (nActiveTransferArea) {
+ case 0: // Sprites
+ address = (nSpriteTransferBank + (sekAddress & 0x0FFFFF));
+
+ // address is swizzled a bit due to out sprite decoding
+ if ((address&3)==0) NeoSpriteRAM[address] = byteValue;
+ if ((address&3)==1) NeoSpriteRAM[address^3] = byteValue;
+ if ((address&3)==2) NeoSpriteRAM[address^3] = byteValue;
+ if ((address&3)==3) NeoSpriteRAM[address] = byteValue;
+
+ break;
+ case 1: // ADPCM
+ YM2610ADPCMAROM[nADPCMTransferBank + ((sekAddress & 0x0FFFFF) >> 1)] = byteValue;
+ break;
+ case 4: // Z80
+
+ // kof98 and lresort attempt to write here when the system still has the z80 bank
+ // it seems they attempt to write regular samples (not even deltat) maybe there is
+ // some kind of fall-through behavior, or it shouldn't be allowed to select a
+ // transfer area without the bus? - this should really be checked on hw
+ if (m_has_z80_bus)
+ {
+ YM2610ADPCMAROM[nADPCMTransferBank + ((sekAddress & 0x0FFFFF) >> 1)] = byteValue;
+ }
+ else
+ {
+ // printf("sekAddress %08x %02x\n", sekAddress, data);
+ if ((sekAddress & 0xfffff) >= 0x20000) break;
+ NeoZ80ROMActive[(sekAddress & 0x1FFFF) >> 1] = byteValue;
+ }
+ break;
+ case 5: // Text
+ NeoTextRAM[(sekAddress & 0x3FFFF) >> 1] = byteValue;
+ break;
+ }
+}
+
+
+
+void ngcd_state::set_DMA_regs(int offset, UINT16 wordValue)
+{
+ switch (offset)
+ {
+ case 0x0064:
+ NeoCDDMAAddress1 &= 0x0000FFFF;
+ NeoCDDMAAddress1 |= wordValue << 16;
+ break;
+ case 0x0066:
+ NeoCDDMAAddress1 &= 0xFFFF0000;
+ NeoCDDMAAddress1 |= wordValue;
+ break;
+ case 0x0068:
+ NeoCDDMAAddress2 &= 0x0000FFFF;
+ NeoCDDMAAddress2 |= wordValue << 16;
+ break;
+ case 0x006A:
+ NeoCDDMAAddress2 &= 0xFFFF0000;
+ NeoCDDMAAddress2 |= wordValue;
+ break;
+ case 0x006C:
+ NeoCDDMAValue1 = wordValue;
+ break;
+ case 0x006E:
+ NeoCDDMAValue2 = wordValue;
+ break;
+ case 0x0070:
+ NeoCDDMACount &= 0x0000FFFF;
+ NeoCDDMACount |= wordValue << 16;
+ break;
+ case 0x0072:
+ NeoCDDMACount &= 0xFFFF0000;
+ NeoCDDMACount |= wordValue;
+ break;
+
+ case 0x007E:
+ NeoCDDMAMode = wordValue;
+// bprintf(PRINT_NORMAL, _T(" - DMA controller 0x%2X -> 0x%04X (PC: 0x%06X)\n"), sekAddress & 0xFF, wordValue, SekGetPC(-1));
+ break;
+
+ }
+}
+
+
+
+INT32 ngcd_state::SekIdle(INT32 nCycles)
+{
+ return nCycles;
+}
+
+
+
+/*
+ * CD-ROM / DMA control
+ *
+ * DMA
+
+ FF0061 Write 0x40 means start DMA transfer
+ FF0064 Source address (in copy mode), Target address (in filll mode)
+ FF0068 Target address (in copy mode)
+ FF006C Fill word
+ FF0070 Words count
+ FF007E \
+ ...... | DMA programming words? NeoGeoCD uses Sanyo Puppet LC8359 chip to
+ FF008E / interface with CD, and do DMA transfers
+
+ Memory access control
+
+ FF011C DIP SWITCH (Region code)
+ FF0105 Area Selector (5 = FIX, 0 = SPR, 4 = Z80, 1 = PCM)
+ FF01A1 Sprite bank selector
+ FF01A3 PCM bank selector
+ FF0120 Prepare sprite area for transfer
+ FF0122 Prepare PCM area for transfer
+ FF0126 Prepare Z80 area for transfer
+ FF0128 Prepare Fix area for transfer
+ FF0140 Terminate work on Spr Area (Sprites must be decoded here)
+ FF0142 Terminate work on Pcm Area
+ FF0146 Terminate work on Z80 Area (Z80 needs to be reset)
+ FF0148 Terminate work on Fix Area
+
+ CD-ROM:
+ 0xff0102 == 0xF0 start cd transfer
+ int m=bcd(fast_r8(0x10f6c8));
+ int s=bcd(fast_r8(0x10f6c9));
+ int f=bcd(fast_r8(0x10f6ca));
+ int seccount=fast_r16(0x10f688);
+
+ inisec=((m*60)+s)*75+f;
+ inisec-=150;
+ dstaddr=0x111204; // this must come from somewhere
+
+ the value @ 0x10f688 is decremented each time a sector is read until it's 0.
+
+ *
+ */
+
+
+void ngcd_state::NeoCDDoDMA(address_space& curr_space)
+{
+ // The LC8953 chip has a programmable DMA controller, which is not properly emulated.
+ // Since the software only uses it in a limited way, we can apply a simple heuristic
+ // to determnine the requested operation.
+
+ // Additionally, we don't know how many cycles DMA operations take.
+ // Here, only bus access is used to get a rough approximation --
+ // each read/write takes a single cycle, setup and everything else is ignored.
+
+// bprintf(PRINT_IMPORTANT, _T(" - DMA controller transfer started (PC: 0x%06X)\n"), SekGetPC(-1));
+
+ switch (NeoCDDMAMode) {
+ case 0xCFFD: {
+// bprintf(PRINT_NORMAL, _T(" adr : 0x%08X - 0x%08X <- address, skip odd bytes\n"), NeoCDDMAAddress1, NeoCDDMAAddress1 + NeoCDDMACount * 8);
+
+ // - DMA controller 0x7E -> 0xCFFD (PC: 0xC07CE2)
+ // - DMA controller program[00] -> 0xFCF5 (PC: 0xC07CE8)
+ // - DMA controller program[02] -> 0xE8DA (PC: 0xC07CEE)
+ // - DMA controller program[04] -> 0x92DA (PC: 0xC07CF4)
+ // - DMA controller program[06] -> 0x92DB (PC: 0xC07CFA)
+ // - DMA controller program[08] -> 0x96DB (PC: 0xC07D00)
+ // - DMA controller program[10] -> 0x96F6 (PC: 0xC07D06)
+ // - DMA controller program[12] -> 0x2E02 (PC: 0xC07D0C)
+ // - DMA controller program[14] -> 0xFDFF (PC: 0xC07D12)
+
+ SekIdle(NeoCDDMACount * 4);
+
+ while (NeoCDDMACount--) {
+ curr_space.write_word(NeoCDDMAAddress1 + 0, NeoCDDMAAddress1 >> 24);
+ curr_space.write_word(NeoCDDMAAddress1 + 2, NeoCDDMAAddress1 >> 16);
+ curr_space.write_word(NeoCDDMAAddress1 + 4, NeoCDDMAAddress1 >> 8);
+ curr_space.write_word(NeoCDDMAAddress1 + 6, NeoCDDMAAddress1 >> 0);
+ NeoCDDMAAddress1 += 8;
+ }
+
+ break;
+ }
+
+ case 0xE2DD: {
+// bprintf(PRINT_NORMAL, _T(" copy: 0x%08X - 0x%08X <- 0x%08X - 0x%08X, skip odd bytes\n"), NeoCDDMAAddress2, NeoCDDMAAddress2 + NeoCDDMACount * 2, NeoCDDMAAddress1, NeoCDDMAAddress1 + NeoCDDMACount * 4);
+
+ // - DMA controller 0x7E -> 0xE2DD (PC: 0xC0A190)
+ // - DMA controller program[00] -> 0xFCF5 (PC: 0xC0A192)
+ // - DMA controller program[02] -> 0x82BE (PC: 0xC0A194)
+ // - DMA controller program[04] -> 0x93DA (PC: 0xC0A196)
+ // - DMA controller program[06] -> 0xBE93 (PC: 0xC0A198)
+ // - DMA controller program[08] -> 0xDABE (PC: 0xC0A19A)
+ // - DMA controller program[10] -> 0xF62D (PC: 0xC0A19C)
+ // - DMA controller program[12] -> 0x02FD (PC: 0xC0A19E)
+ // - DMA controller program[14] -> 0xFFFF (PC: 0xC0A1A0)
+
+ SekIdle(NeoCDDMACount * 1);
+
+ while (NeoCDDMACount--) {
+ curr_space.write_word(NeoCDDMAAddress2 + 0, curr_space.read_byte(NeoCDDMAAddress1 + 0));
+ curr_space.write_word(NeoCDDMAAddress2 + 2, curr_space.read_byte(NeoCDDMAAddress1 + 1));
+ NeoCDDMAAddress1 += 2;
+ NeoCDDMAAddress2 += 4;
+ }
+
+ break;
+ }
+
+ case 0xFC2D: {
+// bprintf(PRINT_NORMAL, _T(" copy: 0x%08X - 0x%08X <- LC8951 external buffer, skip odd bytes\n"), NeoCDDMAAddress1, NeoCDDMAAddress1 + NeoCDDMACount * 4);
+
+ // - DMA controller 0x7E -> 0xFC2D (PC: 0xC0A190)
+ // - DMA controller program[00] -> 0xFCF5 (PC: 0xC0A192)
+ // - DMA controller program[02] -> 0x8492 (PC: 0xC0A194)
+ // - DMA controller program[04] -> 0xDA92 (PC: 0xC0A196)
+ // - DMA controller program[06] -> 0xDAF6 (PC: 0xC0A198)
+ // - DMA controller program[08] -> 0x2A02 (PC: 0xC0A19A)
+ // - DMA controller program[10] -> 0xFDFF (PC: 0xC0A19C)
+ // - DMA controller program[12] -> 0x48E7 (PC: 0xC0A19E)
+ // - DMA controller program[14] -> 0xFFFE (PC: 0xC0A1A0)
+
+ char* data = m_tempcdc->LC8915InitTransfer(NeoCDDMACount);
+ if (data == nullptr) {
+ break;
+ }
+
+ SekIdle(NeoCDDMACount * 4);
+
+ while (NeoCDDMACount--) {
+ curr_space.write_byte(NeoCDDMAAddress1 + 0, data[0]);
+ curr_space.write_byte(NeoCDDMAAddress1 + 2, data[1]);
+ NeoCDDMAAddress1 += 4;
+ data += 2;
+ }
+
+ m_tempcdc->LC8915EndTransfer();
+
+ break;
+ }
+
+ case 0xFE3D:
+
+ // - DMA controller 0x7E -> 0xFE3D (PC: 0xC0A190)
+ // - DMA controller program[00] -> 0xFCF5 (PC: 0xC0A192)
+ // - DMA controller program[02] -> 0x82BF (PC: 0xC0A194)
+ // - DMA controller program[04] -> 0x93BF (PC: 0xC0A196)
+ // - DMA controller program[06] -> 0xF629 (PC: 0xC0A198)
+ // - DMA controller program[08] -> 0x02FD (PC: 0xC0A19A)
+ // - DMA controller program[10] -> 0xFFFF (PC: 0xC0A19C)
+ // - DMA controller program[12] -> 0xF17D (PC: 0xC0A19E)
+ // - DMA controller program[14] -> 0xFCF5 (PC: 0xC0A1A0)
+
+ case 0xFE6D: {
+// bprintf(PRINT_NORMAL, _T(" copy: 0x%08X - 0x%08X <- 0x%08X - 0x%08X\n"), NeoCDDMAAddress2, NeoCDDMAAddress2 + NeoCDDMACount * 2, NeoCDDMAAddress1, NeoCDDMAAddress1 + NeoCDDMACount * 2);
+
+ // - DMA controller 0x7E -> 0xFE6D (PC: 0xC0FD7A)
+ // - DMA controller program[00] -> 0xFCF5 (PC: 0xC0FD7C)
+ // - DMA controller program[02] -> 0x82BF (PC: 0xC0FD7E)
+ // - DMA controller program[04] -> 0xF693 (PC: 0xC0FD80)
+ // - DMA controller program[06] -> 0xBF29 (PC: 0xC0FD82)
+ // - DMA controller program[08] -> 0x02FD (PC: 0xC0FD84)
+ // - DMA controller program[10] -> 0xFFFF (PC: 0xC0FD86)
+ // - DMA controller program[12] -> 0xC515 (PC: 0xC0FD88)
+ // - DMA controller program[14] -> 0xFCF5 (PC: 0xC0FD8A)
+
+ SekIdle(NeoCDDMACount * 1);
+
+ while (NeoCDDMACount--) {
+ curr_space.write_word(NeoCDDMAAddress2, curr_space.read_word(NeoCDDMAAddress1));
+ NeoCDDMAAddress1 += 2;
+ NeoCDDMAAddress2 += 2;
+ }
+
+if (NeoCDDMAAddress2 == 0x0800) {
+// MapVectorTable(false);
+// bprintf(PRINT_ERROR, _T(" RAM vectors mapped (PC = 0x%08X\n"), SekGetPC(0));
+// extern INT32 bRunPause;
+// bRunPause = 1;
+}
+ break;
+ }
+
+ case 0xFEF5: {
+// bprintf(PRINT_NORMAL, _T(" adr : 0x%08X - 0x%08X <- address\n"), NeoCDDMAAddress1, NeoCDDMAAddress1 + NeoCDDMACount * 4);
+
+ // - DMA controller 0x7E -> 0xFEF5 (PC: 0xC07CE2)
+ // - DMA controller program[00] -> 0xFCF5 (PC: 0xC07CE8)
+ // - DMA controller program[02] -> 0x92E8 (PC: 0xC07CEE)
+ // - DMA controller program[04] -> 0xBE96 (PC: 0xC07CF4)
+ // - DMA controller program[06] -> 0xF629 (PC: 0xC07CFA)
+ // - DMA controller program[08] -> 0x02FD (PC: 0xC07D00)
+ // - DMA controller program[10] -> 0xFFFF (PC: 0xC07D06)
+ // - DMA controller program[12] -> 0xFC3D (PC: 0xC07D0C)
+ // - DMA controller program[14] -> 0xFCF5 (PC: 0xC07D12)
+
+ SekIdle(NeoCDDMACount * 2);
+
+ while (NeoCDDMACount--) {
+ curr_space.write_word(NeoCDDMAAddress1 + 0, NeoCDDMAAddress1 >> 16);
+ curr_space.write_word(NeoCDDMAAddress1 + 2, NeoCDDMAAddress1 >> 0);
+ NeoCDDMAAddress1 += 4;
+ }
+
+ break;
+ }
+
+ case 0xFFC5: {
+// bprintf(PRINT_NORMAL, _T(" copy: 0x%08X - 0x%08X <- LC8951 external buffer\n"), NeoCDDMAAddress1, NeoCDDMAAddress1 + NeoCDDMACount * 2);
+
+ // - DMA controller 0x7E -> 0xFFC5 (PC: 0xC0A190)
+ // - DMA controller program[00] -> 0xFCF5 (PC: 0xC0A192)
+ // - DMA controller program[02] -> 0xA6F6 (PC: 0xC0A194)
+ // - DMA controller program[04] -> 0x2602 (PC: 0xC0A196)
+ // - DMA controller program[06] -> 0xFDFF (PC: 0xC0A198)
+ // - DMA controller program[08] -> 0xFC2D (PC: 0xC0A19A)
+ // - DMA controller program[10] -> 0xFCF5 (PC: 0xC0A19C)
+ // - DMA controller program[12] -> 0x8492 (PC: 0xC0A19E)
+ // - DMA controller program[14] -> 0xDA92 (PC: 0xC0A1A0)
+
+ char* data = m_tempcdc->LC8915InitTransfer(NeoCDDMACount);
+ if (data == nullptr) {
+ break;
+ }
+
+ SekIdle(NeoCDDMACount * 4);
+
+ while (NeoCDDMACount--) {
+ curr_space.write_byte(NeoCDDMAAddress1 + 0, data[0]);
+ curr_space.write_byte(NeoCDDMAAddress1 + 1, data[1]);
+ NeoCDDMAAddress1 += 2;
+ data += 2;
+ }
+
+ m_tempcdc->LC8915EndTransfer();
+
+ break;
+ }
+
+ case 0xFFCD:
+
+ // - DMA controller 0x7E -> 0xFFCD (PC: 0xC0A190)
+ // - DMA controller program[00] -> 0xFCF5 (PC: 0xC0A192)
+ // - DMA controller program[02] -> 0x92F6 (PC: 0xC0A194)
+ // - DMA controller program[04] -> 0x2602 (PC: 0xC0A196)
+ // - DMA controller program[06] -> 0xFDFF (PC: 0xC0A198)
+ // - DMA controller program[08] -> 0x7006 (PC: 0xC0A19A)
+ // - DMA controller program[10] -> 0x6100 (PC: 0xC0A19C)
+ // - DMA controller program[12] -> 0x2412 (PC: 0xC0A19E)
+ // - DMA controller program[14] -> 0x13FC (PC: 0xC0A1A0)
+
+ case 0xFFDD: {
+// bprintf(PRINT_NORMAL, _T(" Fill: 0x%08X - 0x%08X <- 0x%04X\n"), NeoCDDMAAddress1, NeoCDDMAAddress1 + NeoCDDMACount * 2, NeoCDDMAValue1);
+
+ // - DMA controller 0x7E -> 0xFFDD (PC: 0xC07CE2)
+ // - DMA controller program[00] -> 0xFCF5 (PC: 0xC07CE8)
+ // - DMA controller program[02] -> 0x92F6 (PC: 0xC07CEE)
+ // - DMA controller program[04] -> 0x2602 (PC: 0xC07CF4)
+ // - DMA controller program[06] -> 0xFDFF (PC: 0xC07CFA)
+ // - DMA controller program[08] -> 0xFFFF (PC: 0xC07D00)
+ // - DMA controller program[10] -> 0xFCF5 (PC: 0xC07D06)
+ // - DMA controller program[12] -> 0x8AF0 (PC: 0xC07D0C)
+ // - DMA controller program[14] -> 0x1609 (PC: 0xC07D12)
+
+ SekIdle(NeoCDDMACount * 1);
+
+ while (NeoCDDMACount--) {
+ curr_space.write_word(NeoCDDMAAddress1, NeoCDDMAValue1);
+ NeoCDDMAAddress1 += 2;
+ }
+
+ break;
+ }
+ default: {
+ //bprintf(PRINT_ERROR, _T(" Unknown transfer type 0x%04X (PC: 0x%06X)\n"), NeoCDDMAMode, SekGetPC(-1));
+ //bprintf(PRINT_NORMAL, _T(" ??? : 0x%08X 0x%08X 0x%04X 0x%04X 0x%08X\n"), NeoCDDMAAddress1, NeoCDDMAAddress2, NeoCDDMAValue1, NeoCDDMAValue2, NeoCDDMACount);
+
+//extern INT32 bRunPause;
+//bRunPause = 1;
+
+ }
+ }
+}
+
+
+/*************************************
+ *
+ * Machine initialization
+ *
+ *************************************/
+
+MACHINE_START_MEMBER(ngcd_state,neocd)
+{
+ m_type = NEOGEO_CD;
+ common_machine_start();
+
+ // set curr_slot to 0, so to allow checking m_slots[m_curr_slot] != nullptr
+ m_curr_slot = 0;
+
+ // initialize sprite to point to memory regions
+ m_sprgen->m_fixed_layer_bank_type = 0;
+ m_sprgen->set_screen(m_screen);
+ m_sprgen->set_sprite_region(m_region_sprites->base(), m_region_sprites->bytes());
+ m_sprgen->set_fixed_regions(m_region_fixed->base(), m_region_fixed->bytes(), m_region_fixedbios);
+ m_sprgen->neogeo_set_fixed_layer_source(1);
+
+ // irq levels for NEOCD (swapped compared to MVS / AES)
+ m_vblank_level = 2;
+ m_raster_level = 1;
+
+ // initialize the memcard data structure
+ // NeoCD doesn't have memcard slots, rather, it has a larger internal memory which works the same
+ m_meminternal_data = make_unique_clear<UINT8[]>(0x2000);
+ machine().device<nvram_device>("saveram")->set_base(m_meminternal_data.get(), 0x2000);
+ save_pointer(NAME(m_meminternal_data.get()), 0x2000);
+
+ m_use_cart_vectors = 0;
+
+ m_tempcdc->reset_cd();
+}
+
+
+/*************************************
+ *
+ * Machine reset
+ *
+ *************************************/
+
+MACHINE_RESET_MEMBER(ngcd_state,neocd)
+{
+ neogeo_state::machine_reset();
+
+ NeoSpriteRAM = memregion("sprites")->base();
+ YM2610ADPCMAROM = memregion("ymsnd")->base();
+ NeoZ80ROMActive = memregion("audiocpu")->base();
+ NeoTextRAM = memregion("fixed")->base();
+
+ m_tempcdc->NeoCDCommsReset();
+
+ m_audiocpu->set_input_line(INPUT_LINE_HALT, ASSERT_LINE);
+ m_audiocpu->set_input_line(INPUT_LINE_RESET, ASSERT_LINE);
+
+ nTransferWriteEnable = 0;
+}
+
+
+/*************************************
+ *
+ * Main CPU memory handlers
+ *
+ *************************************/
+
+static ADDRESS_MAP_START( neocd_main_map, AS_PROGRAM, 16, ngcd_state )
+// AM_RANGE(0x000000, 0x00007f) AM_READ_BANK("vectors") // writes will fall through to area below
+ AM_RANGE(0x000000, 0x00007f) AM_READ(banked_vectors_r)
+ AM_RANGE(0x000000, 0x1fffff) AM_RAM AM_REGION("maincpu", 0x00000)
+
+ AM_RANGE(0x300000, 0x300001) AM_MIRROR(0x01fffe) AM_DEVREAD8("ctrl1", neogeo_control_port_device, ctrl_r, 0xff00)
+ AM_RANGE(0x320000, 0x320001) AM_MIRROR(0x01fffe) AM_READ_PORT("AUDIO") AM_WRITE8(audio_command_w, 0xff00)
+ AM_RANGE(0x340000, 0x340001) AM_MIRROR(0x01fffe) AM_DEVREAD8("ctrl1", neogeo_control_port_device, ctrl_r, 0xff00)
+ AM_RANGE(0x360000, 0x37ffff) AM_READ(unmapped_r)
+ AM_RANGE(0x380000, 0x380001) AM_MIRROR(0x01fffe) AM_READ(aes_in2_r)
+ AM_RANGE(0x380000, 0x38007f) AM_MIRROR(0x01ff80) AM_WRITE8(io_control_w, 0x00ff)
+ AM_RANGE(0x3a0000, 0x3a001f) AM_MIRROR(0x01ffe0) AM_READ(unmapped_r) AM_WRITE8(system_control_w, 0x00ff)
+ AM_RANGE(0x3c0000, 0x3c0007) AM_MIRROR(0x01fff8) AM_READ(video_register_r)
+ AM_RANGE(0x3c0000, 0x3c000f) AM_MIRROR(0x01fff0) AM_WRITE(video_register_w)
+ AM_RANGE(0x3e0000, 0x3fffff) AM_READ(unmapped_r)
+ AM_RANGE(0x400000, 0x401fff) AM_MIRROR(0x3fe000) AM_READWRITE(paletteram_r, paletteram_w)
+ AM_RANGE(0x800000, 0x803fff) AM_READWRITE(neocd_memcard_r, neocd_memcard_w)
+ AM_RANGE(0xc00000, 0xc7ffff) AM_MIRROR(0x080000) AM_ROM AM_REGION("mainbios", 0)
+ AM_RANGE(0xd00000, 0xdfffff) AM_READ(unmapped_r)
+ AM_RANGE(0xe00000, 0xefffff) AM_READWRITE8(neocd_transfer_r,neocd_transfer_w, 0xffff)
+ AM_RANGE(0xf00000, 0xfeffff) AM_READ(unmapped_r)
+ AM_RANGE(0xff0000, 0xff01ff) AM_READWRITE(neocd_control_r, neocd_control_w) // CDROM / DMA
+ AM_RANGE(0xff0200, 0xffffff) AM_READ(unmapped_r)
+ADDRESS_MAP_END
+
+
+/*************************************
+ *
+ * Audio CPU port handlers
+ *
+ *************************************/
+
+
+static ADDRESS_MAP_START( neocd_audio_map, AS_PROGRAM, 8, ngcd_state )
+ AM_RANGE(0x0000, 0xffff) AM_RAM AM_REGION("audiocpu", 0x00000)
+ADDRESS_MAP_END
+
+
+static ADDRESS_MAP_START( neocd_audio_io_map, AS_IO, 8, ngcd_state )
+ AM_RANGE(0x00, 0x00) AM_MIRROR(0xff00) AM_READWRITE(audio_command_r, soundlatch_clear_byte_w)
+ AM_RANGE(0x04, 0x07) AM_MIRROR(0xff00) AM_DEVREADWRITE("ymsnd", ym2610_device, read, write)
+ AM_RANGE(0x08, 0x08) AM_MIRROR(0xff10) AM_MASK(0x0010) AM_WRITE(audio_cpu_enable_nmi_w)
+ // banking reads are actually NOP on NeoCD? but some games still access them
+// AM_RANGE(0x08, 0x0b) AM_MIRROR(0xfff0) AM_MASK(0xff03) AM_READ(audio_cpu_bank_select_r)
+ AM_RANGE(0x0c, 0x0c) AM_MIRROR(0xff00) AM_WRITE(soundlatch2_byte_w)
+
+ // ??
+ AM_RANGE(0x80, 0x80) AM_MIRROR(0xff00) AM_WRITENOP
+ AM_RANGE(0xc0, 0xc0) AM_MIRROR(0xff00) AM_WRITENOP
+ AM_RANGE(0xc1, 0xc1) AM_MIRROR(0xff00) AM_WRITENOP
+ADDRESS_MAP_END
+
+
+/*************************************
+ *
+ * Input port definitions
+ *
+ *************************************/
+
+static INPUT_PORTS_START( neocd )
+ PORT_INCLUDE( aes )
+
+ PORT_MODIFY("IN2")
+ PORT_BIT( 0x7000, IP_ACTIVE_HIGH, IPT_UNUSED ) // the NeoCD memcard is internal
+INPUT_PORTS_END
+
+
+
+/*************************************
+ *
+ * Machine driver
+ *
+ *************************************/
+
+
+/* NeoCD uses custom vectors on IRQ4 to handle various events from the CDC */
+
+IRQ_CALLBACK_MEMBER(ngcd_state::neocd_int_callback)
+{
+ if (irqline==4)
+ {
+ if (get_nNeoCDIRQVectorAck()) {
+ set_nNeoCDIRQVectorAck(0);
+ return get_nNeoCDIRQVector();
+ }
+ }
+
+ return (0x60+irqline*4)/4;
+}
+
+void ngcd_state::interrupt_callback_type1(void)
+{
+ nIRQAcknowledge &= ~0x20;
+ NeoCDIRQUpdate(0);
+}
+
+void ngcd_state::interrupt_callback_type2(void)
+{
+ nIRQAcknowledge &= ~0x10;
+ NeoCDIRQUpdate(0);
+}
+
+void ngcd_state::interrupt_callback_type3(void)
+{
+ nIRQAcknowledge &= ~0x08;
+ NeoCDIRQUpdate(0);
+}
+
+
+void ngcd_state::NeoCDIRQUpdate(UINT8 byteValue)
+{
+ // do we also need to check the regular interrupts like FBA?
+
+ nIRQAcknowledge |= (byteValue & 0x38);
+
+ if (!prohibit_cdc_irq)
+ {
+ if ((nIRQAcknowledge & 0x08) == 0) {
+ nNeoCDIRQVector = 0x17;
+ nNeoCDIRQVectorAck = 1;
+ m_maincpu->set_input_line(4, HOLD_LINE);
+ return;
+ }
+ if ((nIRQAcknowledge & 0x10) == 0) {
+ nNeoCDIRQVector = 0x16;
+ nNeoCDIRQVectorAck = 1;
+ m_maincpu->set_input_line(4, HOLD_LINE);
+ return;
+ }
+ if ((nIRQAcknowledge & 0x20) == 0) {
+ nNeoCDIRQVector = 0x15;
+ nNeoCDIRQVectorAck = 1;
+ m_maincpu->set_input_line(4, HOLD_LINE);
+ return;
+ }
+ }
+}
+
+
+UINT32 ngcd_state::screen_update_neocd(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
+{
+ // fill with background color first
+ bitmap.fill(*m_bg_pen, cliprect);
+
+ if (m_has_sprite_bus) m_sprgen->draw_sprites(bitmap, cliprect.min_y);
+
+ if (m_has_text_bus) m_sprgen->draw_fixed_layer(bitmap, cliprect.min_y);
+
+ return 0;
+}
+
+
+static MACHINE_CONFIG_DERIVED_CLASS( neocd, neogeo_base, ngcd_state )
+
+ MCFG_CPU_MODIFY("maincpu")
+ MCFG_CPU_PROGRAM_MAP(neocd_main_map)
+ MCFG_CPU_IRQ_ACKNOWLEDGE_DRIVER(ngcd_state,neocd_int_callback)
+
+ MCFG_CPU_MODIFY("audiocpu")
+ MCFG_CPU_PROGRAM_MAP(neocd_audio_map)
+ MCFG_CPU_IO_MAP(neocd_audio_io_map)
+
+ MCFG_SCREEN_MODIFY("screen")
+ MCFG_SCREEN_UPDATE_DRIVER(ngcd_state, screen_update_neocd)
+
+ // temporary until things are cleaned up
+ MCFG_DEVICE_ADD("tempcdc", LC89510_TEMP, 0) // cd controller
+ MCFG_SEGACD_HACK_SET_NEOCD
+ MCFG_SET_TYPE1_INTERRUPT_CALLBACK( ngcd_state, interrupt_callback_type1 )
+ MCFG_SET_TYPE2_INTERRUPT_CALLBACK( ngcd_state, interrupt_callback_type2 )
+ MCFG_SET_TYPE3_INTERRUPT_CALLBACK( ngcd_state, interrupt_callback_type3 )
+
+ MCFG_NVRAM_ADD_0FILL("saveram")
+
+ MCFG_MACHINE_START_OVERRIDE(ngcd_state,neocd)
+ MCFG_MACHINE_RESET_OVERRIDE(ngcd_state,neocd)
+
+ MCFG_NEOGEO_CONTROL_PORT_ADD("ctrl1", neogeo_controls, "joy", false)
+ MCFG_NEOGEO_CONTROL_PORT_ADD("ctrl2", neogeo_controls, "joy", false)
+
+ MCFG_CDROM_ADD( "cdrom" )
+ MCFG_CDROM_INTERFACE("neocd_cdrom")
+ MCFG_SOFTWARE_LIST_ADD("cd_list","neocd")
+MACHINE_CONFIG_END
+
+
+
+/*************************************
+ *
+ * Driver initalization
+ *
+ *************************************/
+
+ROM_START( neocd )
+ ROM_REGION16_BE( 0x80000, "mainbios", 0 )
+ ROM_SYSTEM_BIOS( 0, "top", "Top loading NeoGeo CD" )
+ ROMX_LOAD( "top-sp1.bin", 0x00000, 0x80000, CRC(c36a47c0) SHA1(235f4d1d74364415910f73c10ae5482d90b4274f), ROM_GROUPWORD | ROM_REVERSE | ROM_BIOS(1))
+ ROM_SYSTEM_BIOS( 1, "front", "Front loading NeoGeo CD" )
+ ROMX_LOAD( "front-sp1.bin", 0x00000, 0x80000, CRC(cac62307) SHA1(53bc1f283cdf00fa2efbb79f2e36d4c8038d743a), ROM_GROUPWORD | ROM_REVERSE | ROM_BIOS(2))
+
+ ROM_REGION( 0x100000, "ymsnd", ROMREGION_ERASEFF )
+ /* 1MB of Sound RAM */
+
+ ROM_REGION( 0x90000, "audiocpu", ROMREGION_ERASEFF )
+ /* 64KB of Z80 RAM */
+
+ ROM_REGION( 0x200000, "maincpu", ROMREGION_ERASE00 )
+ /* 2MB of 68K RAM */
+
+ ROM_REGION( 0x400000, "sprites", ROMREGION_ERASEFF )
+ /* 4MB of Sprite Tile RAM */
+
+ ROM_REGION( 0x20000, "fixed", ROMREGION_ERASEFF )
+ /* 128KB of Text Tile RAM */
+
+ ROM_REGION( 0x20000, "zoomy", 0 )
+ ROM_LOAD( "000-lo.lo", 0x00000, 0x20000, CRC(5a86cff2) SHA1(5992277debadeb64d1c1c64b0a92d9293eaf7e4a) )
+ROM_END
+
+ROM_START( neocdz )
+ ROM_REGION16_BE( 0x80000, "mainbios", 0 )
+ ROM_LOAD16_WORD_SWAP( "neocd.bin", 0x00000, 0x80000, CRC(df9de490) SHA1(7bb26d1e5d1e930515219cb18bcde5b7b23e2eda) )
+
+ ROM_REGION( 0x100000, "ymsnd", ROMREGION_ERASEFF )
+ /* 1MB of Sound RAM */
+
+ ROM_REGION( 0x90000, "audiocpu", ROMREGION_ERASEFF )
+ /* 64KB of Z80 RAM */
+
+ ROM_REGION( 0x200000, "maincpu", ROMREGION_ERASE00 )
+ /* 2MB of 68K RAM */
+
+ ROM_REGION( 0x400000, "sprites", ROMREGION_ERASEFF )
+ /* 4MB of Sprite Tile RAM */
+
+ ROM_REGION( 0x20000, "fixed", ROMREGION_ERASEFF )
+ /* 128KB of Text Tile RAM */
+
+ ROM_REGION( 0x20000, "zoomy", 0 )
+ ROM_LOAD( "000-lo.lo", 0x00000, 0x20000, CRC(5a86cff2) SHA1(5992277debadeb64d1c1c64b0a92d9293eaf7e4a) )
+ROM_END
+
+#define rom_neocdzj rom_neocdz
+
+DRIVER_INIT_MEMBER(ngcd_state,neocdz)
+{
+ NeoSystem = NEOCD_REGION_US;
+}
+
+DRIVER_INIT_MEMBER(ngcd_state,neocdzj)
+{
+ NeoSystem = NEOCD_REGION_JAPAN;
+}
+
+
+/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */
+CONS( 1996, neocdz, 0, 0, neocd, neocd, ngcd_state, neocdz, "SNK", "Neo-Geo CDZ (US)", 0 ) // the CDZ is the newer model
+CONS( 1996, neocdzj, neocdz, 0, neocd, neocd, ngcd_state, neocdzj, "SNK", "Neo-Geo CDZ (Japan)", 0 )
+
+
+CONS( 1994, neocd, neocdz, 0, neocd, neocd, driver_device, 0, "SNK", "Neo-Geo CD", MACHINE_NOT_WORKING ) // older model, ignores disc protections?