// license:LGPL-2.1+ // copyright-holders:Angelo Salese /******************************************************************************************************************* Nichibutsu 1414M4 device emulation Written by Angelo Salese, based on researches by Tomasz Slanina with Legion This is some fancy blitter DMA or MCU or even a discrete structure that copies text strings to a 8-bit text layer in various Nihon Bussan games; TODO: - Identify what exactly this "device" is; - The overlying text layer should actually be a base device for this (and used where not applicable like galivan, armedf and bigfightr); - Command triggering condition not understood (and diverges between galivan.cpp and armedf.cpp); - where is the condition that makes "insert coin" text to properly blink? - first byte meaning is completely unknown; - Ninja Emaki triggers unknown commands 0x8000 & 0xff20; Notes: - Just before any string in the "MCU" rom, there's a control byte, this meaning is as follows: 0?-- ---- ---- ---- interpret as data? 10-- ---- ---- ---- single string transfer 11-- ---- ---- ---- src -> dst copy, if destination != 0 fixed src, otherwise do a src -> dst --xx xxxx xxxx xxxx destination offset in the VRAM tilemap ********************************************************************************************************************/ #include "emu.h" #include "machine/nb1414m4.h" #include "screen.h" DEFINE_DEVICE_TYPE(NB1414M4, nb1414m4_device, "nb1414m4", "NB1414M4 Mahjong Custom") nb1414m4_device::nb1414m4_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, NB1414M4, tag, owner, clock) , device_video_interface(mconfig, *this) , m_data(*this, DEVICE_SELF) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void nb1414m4_device::device_start() { m_previous_0200_command = 0xffff; m_previous_0200_command_frame = 0; m_in_game = false; save_item(NAME(m_previous_0200_command)); save_item(NAME(m_previous_0200_command_frame)); save_item(NAME(m_in_game)); } //------------------------------------------------- // device_reset - device-specific startup //------------------------------------------------- void nb1414m4_device::device_reset() { m_previous_0200_command = 0xffff; m_previous_0200_command_frame = 0; m_in_game = false; } /***************************************************************************** DEVICE HANDLERS *****************************************************************************/ void nb1414m4_device::dma(uint16_t src, uint16_t dst, uint16_t size, uint8_t condition, uint8_t *vram) { int i; for(i=0;i>4) + 0x30) : 0x20; vram[dst+0x400] = (m_data[0x47]); vram[dst+0x001] = ((credit_count & 0x0f) + 0x30); vram[dst+0x401] = (m_data[0x48]); if (m_in_game) return; if(credit_count == 1) /* ONE PLAYER ONLY */ { dst = ((m_data[0x07b]<<8)|(m_data[0x07c]&0xff)) & 0x3fff; dma(0x007d,dst,0x18,fl_cond,vram); } else if(credit_count > 1) /* ONE OR TWO PLAYERS */ { dst = ((m_data[0x0ad]<<8)|(m_data[0x0ae]&0xff)) & 0x3fff; dma(0x00af,dst,0x18,fl_cond,vram); } } void nb1414m4_device::kozure_score_msg(uint16_t dst, uint8_t src_base, uint8_t *vram) { int i; uint8_t first_digit; uint8_t res; first_digit = 0; for(i=0;i<6;i++) { res = ((vram[(i/2)+5+src_base*3] >> (!(i & 1) * 4)) & 0xf); if(first_digit || res) { vram[i+dst+0x0000] = res + 0x30; first_digit = 1; } else vram[i+dst+0x0000] = 0x20; vram[i+dst+0x0400] = m_data[0x10f+(src_base*0x1c)+i]; } vram[6+dst+0x0000] = vram[5+dst+0x0000] == 0x20 ? 0x20 : 0x30; vram[6+dst+0x0400] = m_data[0x10f+(src_base*0x1c)+6]; vram[7+dst+0x0000] = 0x30; vram[7+dst+0x0400] = m_data[0x10f+(src_base*0x1c)+7]; } void nb1414m4_device::_0200(uint16_t mcu_cmd, uint8_t *vram) { uint16_t dst; // In any game, this bit is set when now playing. // If it is set, "INSERT COIN" etc. are not displayed. m_in_game = (mcu_cmd & 0x80) != 0; // If the same command in an extremely short cycle (1 frame or less), ignored it. // This is required to displaying continue screen of ninjaemak. // ninjaemak calls this command to clear the screen, draw the continuation screen, and then immediately call the same command. // This second command must be ignored in order not to corrupt the continue screen. if (m_previous_0200_command == mcu_cmd && (screen().frame_number() - m_previous_0200_command_frame) <= 1) return; dst = (m_data[0x330+((mcu_cmd & 0xf)*2)]<<8)|(m_data[0x331+((mcu_cmd & 0xf)*2)]&0xff); dst &= 0x3fff; if(dst & 0x7ff) // fill fill(0x0000,m_data[dst],m_data[dst+1],vram); else // src -> dst dma(dst,0x0000,0x400,1,vram); m_previous_0200_command = mcu_cmd; m_previous_0200_command_frame = screen().frame_number(); } /* [0x02] & 0x01 p1 up [0x02] & 0x02 p1 down [0x02] & 0x04 p1 left [0x02] & 0x08 p1 right [0x02] & 0x10 p1 button 1 [0x02] & 0x20 p1 button 2 [0x02] & 0x40 p1 button 3 [0x03] & 0x01 p2 up [0x03] & 0x02 p2 down [0x03] & 0x04 p2 left [0x03] & 0x08 p2 right [0x03] & 0x10 p2 button 1 [0x03] & 0x20 p2 button 2 [0x03] & 0x40 p2 button 3 [0x04] & 0x10 service [0x04] & 0x04 coin A [0x04] & 0x08 coin B [0x04] & 0x01 start 1 [0x04] & 0x02 start 2 [0x05] DSW1 [0x06] DSW2 [0x07] & 0x40 demo sounds ON / OFF [0x07] & 0x7 lives setting [0x07] & 0x80 cabinet (upright / table) [0x07] & 0x30 difficulty (easy / normal / hard / hardest) [0x0f] coinage A [0x10] coinage B [0x11] sound test num */ void nb1414m4_device::_0600(uint8_t is2p, uint8_t *vram) { uint16_t dst; int i; dst = ((m_data[0x1f5]<<8)|(m_data[0x1f6]&0xff)) & 0x3fff; vram[dst] = (vram[7] & 0x7) + 0x30;//m_data[0x1f7]; dst = ((m_data[0x1f8]<<8)|(m_data[0x1f9]&0xff)) & 0x3fff; dma(0x1fa + (((vram[7] & 0x30) >> 4) * 0x18),dst,12,1,vram); // 0x25a - 0x261 unknown meaning dst = ((m_data[0x262]<<8)|(m_data[0x263]&0xff)) & 0x3fff; dma(0x264 + (((vram[7] & 0x80) >> 7) * 0x18),dst,12,1,vram); dst = ((m_data[0x294]<<8)|(m_data[0x295]&0xff)) & 0x3fff; dma(0x296 + (((vram[7] & 0x40) >> 6) * 0x18),dst,12,1,vram); dst = ((m_data[0x2c6]<<8)|(m_data[0x2c7]&0xff)) & 0x3fff; vram[dst] = ((vram[0xf] & 0xf0) >> 4) + 0x30;//m_data[0x2c8]; dst = ((m_data[0x2c9]<<8)|(m_data[0x2ca]&0xff)) & 0x3fff; vram[dst] = ((vram[0xf] & 0x0f) >> 0) + 0x30;//m_data[0x2cb]; dst = ((m_data[0x2cc]<<8)|(m_data[0x2cd]&0xff)) & 0x3fff; vram[dst] = ((vram[0x10] & 0xf0) >> 4) + 0x30;//m_data[0x2ce]; dst = ((m_data[0x2cf]<<8)|(m_data[0x2d0]&0xff)) & 0x3fff; vram[dst] = ((vram[0x10] & 0x0f) >> 0) + 0x30;//m_data[0x2d1]; dst = ((m_data[0x2d2]<<8)|(m_data[0x2d3]&0xff)) & 0x3fff; vram[dst+0] = ((vram[0x11] & 0xf0) >> 4) + 0x30;//m_data[0x2d4]; vram[dst+1] = (vram[0x11] & 0x0f) + 0x30;//m_data[0x2d5]; dst = ((m_data[0x2d6]<<8)|(m_data[0x2d7]&0xff)) & 0x3fff; dma(0x2d8 + (is2p * 0x18),dst,12,1,vram); // 1p / 2p string dst = ((m_data[0x308]<<8)|(m_data[0x309]&0xff)) & 0x3fff; for(i=0;i<5;i++) /* system inputs */ dma(0x310 + (((vram[0x04] >> (4-i)) & 1) * 6),dst + (i * 0x20),0x3,1,vram); dst = ((m_data[0x30a]<<8)|(m_data[0x30b]&0xff)) & 0x3fff; for(i=0;i<7;i++) /* 1p / 2p inputs */ dma(0x310 + (((vram[0x02 + is2p] >> (6-i)) & 1) * 6),dst + (i * 0x20),0x3,1,vram); dst = ((m_data[0x30c]<<8)|(m_data[0x30d]&0xff)) & 0x3fff; for(i=0;i<8;i++) /* dips */ dma(0x310 + (((vram[0x05] >> (7-i)) & 1) * 6),dst + (i * 0x20),0x3,1,vram); dst = ((m_data[0x30e]<<8)|(m_data[0x30f]&0xff)) & 0x3fff; for(i=0;i<8;i++) /* dips */ dma(0x310 + (((vram[0x06] >> (7-i)) & 1) * 6),dst + (i * 0x20),0x3,1,vram); } void nb1414m4_device::_0e00(uint16_t mcu_cmd, uint8_t *vram) { uint16_t dst; dst = ((m_data[0xdf]<<8)|(m_data[0xe0]&0xff)) & 0x3fff; dma(0x00e1,dst,8,1,vram); /* hi-score */ dst = ((m_data[0xfb]<<8)|(m_data[0xfc]&0xff)) & 0x3fff; dma(0x00fd,dst,8,!(mcu_cmd & 1),vram); /* 1p-msg */ dst = ((m_data[0x10d]<<8)|(m_data[0x10e]&0xff)) & 0x3fff; kozure_score_msg(dst,0,vram); /* 1p score */ if(mcu_cmd & 0x80) { dst = ((m_data[0x117]<<8)|(m_data[0x118]&0xff)) & 0x3fff; dma(0x0119,dst,8,!(mcu_cmd & 2),vram); /* 2p-msg */ dst = ((m_data[0x129]<<8)|(m_data[0x12a]&0xff)) & 0x3fff; kozure_score_msg(dst,1,vram); /* 2p score */ } if((mcu_cmd & 0x04) == 0) { dst = ((m_data[0x133]<<8)|(m_data[0x134]&0xff)) & 0x3fff; dma(0x0135,dst,0x10,1,vram); /* game over */ insert_coin_msg(vram); if((mcu_cmd & 0x18) == 0) // TODO: either one of these two disables credit display credit_msg(vram); } } /***************************************************************************** DEVICE SETTERS *****************************************************************************/ void nb1414m4_device::vblank_trigger() { // TODO: use this for frame number synchronization instead of screen().frame_number() // real HW references definitely syncs insert coin blinking after POST so whatever is the host actually // have an interest over vblank signal. } void nb1414m4_device::exec(uint16_t mcu_cmd, uint8_t *vram, uint16_t &scrollx, uint16_t &scrolly, tilemap_t *tilemap) { /* latch fg scroll values */ scrollx = (vram[0x0d] & 0xff) | ((vram[0x0e] & 0xff) << 8); scrolly = (vram[0x0b] & 0xff) | ((vram[0x0c] & 0xff) << 8); /* process the command */ switch(mcu_cmd & 0xff00) { /* title screen / continue screens */ case 0x0000: insert_coin_msg(vram); credit_msg(vram); break; /* direct DMA'ing / fill */ case 0x0200: _0200(mcu_cmd & 0x87,vram); break; /* service mode */ case 0x0600: _0600(mcu_cmd & 1,vram); break; /* gameplay */ case 0x0e00: _0e00(mcu_cmd & 0xff,vram); break; case 0x8000: break; //Ninja Emaki, attract mode case 0xff00: break; //Ninja Emaki POST, presumably invalid default: popmessage("NB 1414M4 executes %04x command, contact MAMEdev",mcu_cmd); break; } /* mark tiles dirty */ tilemap->mark_all_dirty(); }