(MESS) nes: added support the new homebrew PCB used by

2A03 Puritans Album. [Fabio Priuli]

.gitattributes

@@ -970,6 +970,8 @@ src/emu/bus/midi/midiinport.c svneol=native#text/plain
 src/emu/bus/midi/midiinport.h svneol=native#text/plain
 src/emu/bus/midi/midioutport.c svneol=native#text/plain
 src/emu/bus/midi/midioutport.h svneol=native#text/plain
+src/emu/bus/nes/2a03pur.c svneol=native#text/plain
+src/emu/bus/nes/2a03pur.h svneol=native#text/plain
 src/emu/bus/nes/act53.c svneol=native#text/plain
 src/emu/bus/nes/act53.h svneol=native#text/plain
 src/emu/bus/nes/aladdin.c svneol=native#text/plain

src/emu/bus/bus.mak

@@ -751,6 +751,7 @@ ifneq ($(filter NES,$(BUSES)),)
 OBJDIRS += $(BUSOBJ)/nes
 BUSOBJS += $(BUSOBJ)/nes/nes_slot.o
 BUSOBJS += $(BUSOBJ)/nes/nes_carts.o
+BUSOBJS += $(BUSOBJ)/nes/2a03pur.o
 BUSOBJS += $(BUSOBJ)/nes/act53.o
 BUSOBJS += $(BUSOBJ)/nes/aladdin.o
 BUSOBJS += $(BUSOBJ)/nes/ave.o

src/emu/bus/nes/2a03pur.c

@@ -0,0 +1,110 @@
+/***********************************************************************************************************
+
+
+ NES/Famicom cartridge emulation for 2A03 Puritans Album
+
+ Copyright MESS Team.
+ Visit http://mamedev.org for licensing and usage restrictions.
+
+
+ Here we emulate the PCB designed by infiniteneslives and
+ rainwarrior for this homebew multicart [mapper 30?]
+ The main difference of this PCB compared to others is that it
+ uses 4k PRG banks!
+
+ ***********************************************************************************************************/
+
+
+#include "emu.h"
+#include "2a03pur.h"
+
+
+#ifdef NES_PCB_DEBUG
+#define VERBOSE 1
+#else
+#define VERBOSE 0
+#endif
+
+#define LOG_MMC(x) do { if (VERBOSE) logerror x; } while (0)
+
+
+//-------------------------------------------------
+//  constructor
+//-------------------------------------------------
+
+const device_type NES_2A03PURITANS = &device_creator<nes_2a03pur_device>;
+
+
+nes_2a03pur_device::nes_2a03pur_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+					: nes_nrom_device(mconfig, NES_2A03PURITANS, "NES Cart 2A03 Puritans Album PCB", tag, owner, clock, "nes_2a03pur", __FILE__)
+{
+}
+
+
+
+void nes_2a03pur_device::device_start()
+{
+	common_start();
+	save_item(NAME(m_reg));
+	memset(m_reg, 0x00, sizeof(m_reg));
+	m_reg[7] = 0xff;
+}
+
+void nes_2a03pur_device::pcb_reset()
+{
+	m_chr_source = m_vrom_chunks ? CHRROM : CHRRAM;
+	chr8(0, m_chr_source);
+	// register content is not touched by reset
+}
+
+
+/*-------------------------------------------------
+ mapper specific handlers
+ -------------------------------------------------*/
+
+/*-------------------------------------------------
+
+ Board 2A03 Puritans Album
+
+ In MESS: supported.
+
+ This mapper supports up to 1MB of PRG-ROM, in 4k 
+ banks located at $8000, $9000, $A000, $B000, $C000, 
+ $D000, $E000, and $F000. Each bank is selected by n 
+ 8-bit register at $5FF8, $5FF9, $5FFA, $5FFB, $5FFC, 
+ $5FFD, $5FFE, and $5FFF, respectively, just like NSF 
+ banking. These registers are mirrored across the 
+ entire $5000-$5FFF region (the register is selected 
+ by the low 3 bits), but it is recommended to use the 
+ original addresses. The mirroring is merely a 
+ convenience for the hardware implementation.
+ 
+ The 8kb CHR region may be RAM or ROM. This project 
+ uses CHR-RAM, and the board used by infiniteneslives 
+ for this project may only support CHR-RAM.
+ 
+ At power-on, the mapper automatically sets all bits 
+ in the $5FFF bank register, placing the highest bank 
+ in $F000. This occurs on power-on but not on reset, 
+ so any bank that is mapped to $F000 after power-on 
+ should contain a valid reset vector.
+ 
+ At present, the project uses iNES mapper 30 to 
+ designate this mapper. No mapper number has been 
+ officially reserved yet.
+ -------------------------------------------------*/
+
+WRITE8_MEMBER(nes_2a03pur_device::write_l)
+{
+	LOG_MMC(("2a03 puritans write_l, offset: %04x, data: %02x\n", offset, data));
+	offset += 0x100;
+	if (offset >= 0x1000)
+		m_reg[offset & 7] = data;
+}
+
+READ8_MEMBER(nes_2a03pur_device::read_h)
+{
+	LOG_MMC(("2a03 puritans read_h, offset: %04x\n", offset));
+
+	return m_prg[(m_reg[(offset >> 12) & 7] * 0x1000) + (offset & 0x0fff)];
+}

src/emu/bus/nes/2a03pur.h

@@ -0,0 +1,31 @@
+#ifndef __NES_2A03PUR_H
+#define __NES_2A03PUR_H
+
+#include "nxrom.h"
+
+
+// ======================> nes_racermate_device
+
+class nes_2a03pur_device : public nes_nrom_device
+{
+public:
+	// construction/destruction
+	nes_2a03pur_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+	// device-level overrides
+	virtual void device_start();
+	virtual DECLARE_READ8_MEMBER(read_h);
+	virtual DECLARE_WRITE8_MEMBER(write_l);
+
+	virtual void pcb_reset();
+
+private:
+	UINT8 m_reg[8];
+};
+
+
+
+// device type definition
+extern const device_type NES_2A03PURITANS;
+
+#endif

src/emu/bus/nes/nes_carts.c

@@ -332,6 +332,7 @@ SLOT_INTERFACE_START(nes_cart)
 	SLOT_INTERFACE_INTERNAL("pjoy84",           NES_PJOY84)
 	SLOT_INTERFACE_INTERNAL("nocash_nochr",     NES_NOCHR)
 	SLOT_INTERFACE_INTERNAL("nes_action53",     NES_ACTION53)
+	SLOT_INTERFACE_INTERNAL("nes_2a03pur",      NES_2A03PURITANS)
 // other unsupported...
 	SLOT_INTERFACE_INTERNAL("ninjaryu",         NES_NROM)    // mapper 111 - UNSUPPORTED
 	SLOT_INTERFACE_INTERNAL("unl_dance",        NES_NROM)    // UNSUPPORTED
@@ -350,7 +351,7 @@ SLOT_INTERFACE_START(nes_cart)
 	SLOT_INTERFACE_INTERNAL("ffe3",             NES_FFE3)
 	SLOT_INTERFACE_INTERNAL("ffe4",             NES_FFE4)
 	SLOT_INTERFACE_INTERNAL("ffe8",             NES_FFE8)
-SLOT_INTERFACE_INTERNAL("test",             NES_NROM)
+	SLOT_INTERFACE_INTERNAL("test",             NES_NROM)
 //
 	SLOT_INTERFACE_INTERNAL("unknown",          NES_NROM)  //  a few pirate dumps uses the wrong mapper...
 SLOT_INTERFACE_END

src/emu/bus/nes/nes_carts.h

@@ -31,6 +31,7 @@
 #include "sunsoft_dcs.h"
 #include "taito.h"
 // unlicensed/bootleg/pirate PCBs
+#include "2a03pur.h"
 #include "act53.h"
 #include "aladdin.h"
 #include "ave.h"

src/emu/bus/nes/nes_ines.inc

@@ -59,7 +59,7 @@ static const nes_mmc mmc_list[] =
 	{ 27, UNL_WORLDHERO },  // 27 World Hero board - Unsupported
 	{ 28, BTL_ACTION53 },   // 28 - Multi-discrete PCB designed by Tepples for Action 53
 	// 29 Unused
-	// 30 Unused
+	{ 30, BTL_2A03_PURITANS },   // 30 - PCB designed by infinitelives & rainwarrior for 2A03 Puritans Album
 	// 31 Unused
 	{ 32, IREM_G101 },
 	{ 33, TAITO_TC0190FMC },

src/emu/bus/nes/nes_pcb.inc

@@ -302,6 +302,7 @@ static const nes_pcb pcb_list[] =
 	{ "unl_cfight",       UNL_CITYFIGHT },
 	{ "nocash_nochr",     NOCASH_NOCHR },
 	{ "nes_action53",     BTL_ACTION53 },
+	{ "nes_2a03pur",      BTL_2A03_PURITANS },
 	{ "ffe3",             FFE3_BOARD },
 	{ "ffe4",             FFE4_BOARD },
 	{ "ffe8",             FFE8_BOARD },

src/emu/bus/nes/nes_slot.h

@@ -121,6 +121,7 @@ enum
 	WHIRLWIND_2706,
 	NOCASH_NOCHR,   // homebrew PCB design which uses NTRAM for CHRRAM
 	BTL_ACTION53,   // homebrew PCB for homebrew multicarts
+	BTL_2A03_PURITANS,   // homebrew PCB
 	/* FFE boards, for mappers 6, 8, 17 */
 	FFE3_BOARD, FFE4_BOARD, FFE8_BOARD, TEST_BOARD,
 	/* Unsupported (for place-holder boards, with no working emulation) & no-board (at init) */

src/mess/machine/nes.c

@@ -159,7 +159,7 @@ void nes_state::machine_start()
 
 		// install additional handlers (read_h, read_ex, write_ex)
 		if (m_cartslot->get_pcb_id() == STD_NROM368 || m_cartslot->get_pcb_id() == GG_NROM || m_cartslot->get_pcb_id() == CAMERICA_ALADDIN || m_cartslot->get_pcb_id() == SUNSOFT_DCS
-			|| m_cartslot->get_pcb_id() == BANDAI_DATACH || m_cartslot->get_pcb_id() == BANDAI_KARAOKE || m_cartslot->get_pcb_id() == AVE_MAXI15
+			|| m_cartslot->get_pcb_id() == BANDAI_DATACH || m_cartslot->get_pcb_id() == BANDAI_KARAOKE || m_cartslot->get_pcb_id() == BTL_2A03_PURITANS || m_cartslot->get_pcb_id() == AVE_MAXI15
 			|| m_cartslot->get_pcb_id() == KAISER_KS7022 || m_cartslot->get_pcb_id() == KAISER_KS7031 || m_cartslot->get_pcb_id() == BMC_VT5201
 			|| m_cartslot->get_pcb_id() == UNL_LH32 || m_cartslot->get_pcb_id() == UNL_LH10 || m_cartslot->get_pcb_id() == UNL_2708
 			|| m_cartslot->get_pcb_id() == UNL_43272 || m_cartslot->get_pcb_id() == BMC_G63IN1 || m_cartslot->get_pcb_id() == BMC_8157