summaryrefslogblamecommitdiffstatshomepage
path: root/src/mame/machine/tatsumi.cpp
blob: e861d47a2bba7fced02abe0b938dbf136db7066b (plain) (tree)
1
2
3
4
5
6
7
8
9

                                  
                
                             

                           


                                                                                
                                   
 

                           
 

                                        



                                                                                
                                            
 
                              

 
                                             

          





                                                                                                      
 
                                      
 
                                    
         
                                                                        
                                                                            
         
 
                                  
                                                                       
            
                                                                      
 
                                  
                                                                         
            
                                                                        
 
                                      

 

                                                        
                                                 
 
                                                                                        

 
                                               
 
                                                                   

                                              
                                            
                                                   
                                                 
                                  
                                                 
                                              
            
                                                                                        
                                                      

 
                                                
 
                                                                   
 
                                            
                                                                                         

                                                                                             
                               
         
                                                            


         
                                           
 
                                         

 
                                            
 
                                                

 
                                          
 
                                                             

 





                                             
                                               
 

                                                         



                                                                                
                                                
 
                                                                   

                                              
                                  
                                                  
 
                                                      

 
                                                 
 
                                                                   
 
                                                                                             
                               
         
                                          
                                                                               
 
                                                            



         
                                                  
 
                                      
 
                                  
                                                                       
            
                                                                      
 
                                 
                                                                         
            
                                                                        
 
                                                                            
                                                                                                




                 


                                                                                  
 

                                                              
 
                                 
 
                                                                          
 
                                                            
 

                                    
 
                                                                   
                                                                       









                                                                 
                                     
         
                                          
                             

         
                                        

 
                                                
 
                                                    
                                                               

 
                                                

                                         

                                          
 
                                                    
                                                                                       
 
                                                               



                                                                                
                                                 
 
                              
 
                                                       
                                                                









                  
                                                                   
         
                                 
                                                                       

         
                                                                   
         
                                   
                                                                      

         
                                        



                                                                                
                                                 
 
                                                           
 
                                                                                    
                               
                                        

                                              
                                             
                 
                                                            










                                                                                                           
                                                  


                               
                                            



                           
                                                  
 

                                                                    
 
                                         





                                                                                     
                                                  
 
                                          
 


                                                                                    



                            
                                               
 
                                   
 




                                                                
                           

                                                                                            


                         
// license:BSD-3-Clause
// copyright-holders:Bryan McPhail
#include "emu.h"
#include "includes/tatsumi.h"
#include "sound/okim6295.h"


/******************************************************************************/

void tatsumi_state::tatsumi_reset()
{
	m_last_control = 0;
	m_control_word = 0;

	save_item(NAME(m_last_control));
	save_item(NAME(m_control_word));
}

/******************************************************************************/

READ16_MEMBER(apache3_state::apache3_bank_r)
{
	return m_control_word;
}

WRITE16_MEMBER(apache3_state::apache3_bank_w)
{
	/*
	    0x8000  - Set when accessing palette ram (not implemented, perhaps blank screen?)
	    0x0080  - Set when accessing IO cpu RAM/ROM (implemented as halt cpu)
	    0x0060  - IOP bank to access from main cpu (0x0 = RAM, 0x20 = lower ROM, 0x60 = upper ROM)
	    0x0010  - Set when accessing OBJ cpu RAM/ROM (implemented as halt cpu)
	    0x000f  - OBJ bank to access from main cpu (0x8 = RAM, 0x0 to 0x7 = ROM)
	*/

	COMBINE_DATA(&m_control_word);

	if (m_control_word & 0x7f00)
	{
		logerror("Unknown control Word: %04x\n",m_control_word);
		m_subcpu2->set_input_line(INPUT_LINE_HALT, CLEAR_LINE); // ?
	}

	if (m_control_word & 0x10)
		m_subcpu->set_input_line(INPUT_LINE_HALT, ASSERT_LINE);
	else
		m_subcpu->set_input_line(INPUT_LINE_HALT, CLEAR_LINE);

	if (m_control_word & 0x80)
		m_audiocpu->set_input_line(INPUT_LINE_HALT, ASSERT_LINE);
	else
		m_audiocpu->set_input_line(INPUT_LINE_HALT, CLEAR_LINE);

	m_last_control=m_control_word;
}

// D1 = /ZBREQ  - Z80 bus request
// D0 = /GRDACC - Allow 68000 access to road pattern RAM
WRITE16_MEMBER(apache3_state::apache3_z80_ctrl_w)
{
	m_subcpu2->set_input_line(INPUT_LINE_HALT, data & 2 ? ASSERT_LINE : CLEAR_LINE);
}

READ16_MEMBER(apache3_state::apache3_v30_v20_r)
{
	address_space &targetspace = m_audiocpu->space(AS_PROGRAM);

	/* Each V20 byte maps to a V30 word */
	if ((m_control_word & 0xe0) == 0xe0)
		offset += 0xf8000; /* Upper half */
	else if ((m_control_word & 0xe0) == 0xc0)
		offset += 0xf0000;
	else if ((m_control_word & 0xe0) == 0x80)
		offset += 0x00000; // main ram
	else
		logerror("%08x: unmapped read z80 rom %08x\n", m_maincpu->pc(), offset);
	return 0xff00 | targetspace.read_byte(offset);
}

WRITE16_MEMBER(apache3_state::apache3_v30_v20_w)
{
	address_space &targetspace = m_audiocpu->space(AS_PROGRAM);

	if ((m_control_word & 0xe0) != 0x80)
		logerror("%08x: write unmapped v30 rom %08x\n", m_maincpu->pc(), offset);

	/* Only 8 bits of the V30 data bus are connected - ignore writes to the other half */
	if (ACCESSING_BITS_0_7)
	{
		targetspace.write_byte(offset, data & 0xff);
	}
}

READ16_MEMBER(apache3_state::apache3_z80_r)
{
	return m_apache3_z80_ram[offset];
}

WRITE16_MEMBER(apache3_state::apache3_z80_w)
{
	m_apache3_z80_ram[offset] = data & 0xff;
}

READ8_MEMBER(apache3_state::apache3_vr1_r)
{
	return (uint8_t)((255./100) * (100 - m_vr1->read()));
}

/* Ground/sky rotation control
 *
 * There are 12 16-bit values that are
 * presumably loaded into the 8 TZ2213 custom
 * accumulators and counters.
 */
WRITE16_MEMBER(apache3_state::apache3_rotate_w)
{
	m_apache3_rotate_ctrl[m_apache3_rot_idx] = data;
	m_apache3_rot_idx = (m_apache3_rot_idx + 1) % 12;
}

/******************************************************************************/

READ16_MEMBER(roundup5_state::roundup_v30_z80_r)
{
	address_space &targetspace = m_audiocpu->space(AS_PROGRAM);

	/* Each Z80 byte maps to a V30 word */
	if (m_control_word & 0x20)
		offset += 0x8000; /* Upper half */

	return 0xff00 | targetspace.read_byte(offset);
}

WRITE16_MEMBER(roundup5_state::roundup_v30_z80_w)
{
	address_space &targetspace = m_audiocpu->space(AS_PROGRAM);

	/* Only 8 bits of the V30 data bus are connected - ignore writes to the other half */
	if (ACCESSING_BITS_0_7)
	{
		if (m_control_word & 0x20)
			offset += 0x8000; /* Upper half of Z80 address space */

		targetspace.write_byte(offset, data & 0xff);
	}
}


WRITE16_MEMBER(roundup5_state::roundup5_control_w)
{
	COMBINE_DATA(&m_control_word);

	if (m_control_word & 0x10)
		m_subcpu->set_input_line(INPUT_LINE_HALT, ASSERT_LINE);
	else
		m_subcpu->set_input_line(INPUT_LINE_HALT, CLEAR_LINE);

	if (m_control_word & 0x4)
		m_audiocpu->set_input_line(INPUT_LINE_HALT, ASSERT_LINE);
	else
		m_audiocpu->set_input_line(INPUT_LINE_HALT, CLEAR_LINE);

//  if (offset == 1 && (tatsumi_control_w & 0xfeff) != (last_bank & 0xfeff))
//      logerror("%s:  Changed bank to %04x (%d)\n", m_maincpu->pc(), tatsumi_control_w,offset);

//todo - watchdog

	/* Bank:

	    0x0017  :   OBJ banks
	    0x0018  :   68000 RAM       mask 0x0380 used to save bits when writing
	    0x0c10  :   68000 ROM

	    0x0040  :   Z80 rom (lower half) mapped to 0x10000
	    0x0060  :   Z80 rom (upper half) mapped to 0x10000

	    0x0100  :   watchdog.

	    0x0c00  :   vram bank (bits 0x7000 also set when writing vram)

	    0x8000  :   set whenever writing to palette ram?

	    Changed bank to 0060 (0)
	*/

	if ((m_control_word & 0x8) == 0 && !(m_last_control & 0x8))
		m_subcpu->set_input_line(INPUT_LINE_IRQ4, ASSERT_LINE);
//  if (tatsumi_control_w&0x200)
//      cpu_set_reset_line(1, CLEAR_LINE);
//  else
//      cpu_set_reset_line(1, ASSERT_LINE);

//  if ((tatsumi_control_w&0x200) && (last_bank&0x200)==0)
//      logerror("68k irq\n");
//  if ((tatsumi_control_w&0x200)==0 && (last_bank&0x200)==0x200)
//      logerror("68k reset\n");

	if (m_control_word == 0x3a00)
	{
//      cpu_set_reset_line(1, CLEAR_LINE);
//      logerror("68k on\n");
	}

	m_last_control = m_control_word;
}

WRITE16_MEMBER(roundup5_state::roundup5_d0000_w)
{
	COMBINE_DATA(&m_roundup5_d0000_ram[offset]);
//  logerror("d_68k_d0000_w %s %04x\n", m_maincpu->pc(), data);
}

WRITE16_MEMBER(roundup5_state::roundup5_e0000_w)
{
	/*  Bit 0x10 is road bank select,
	    Bit 0x100 is used, but unknown
	*/

	COMBINE_DATA(&m_roundup5_e0000_ram[offset]);
	m_subcpu->set_input_line(INPUT_LINE_IRQ4, CLEAR_LINE); // guess, probably wrong

//  logerror("d_68k_e0000_w %s %04x\n", m_maincpu->pc(), data);
}

/******************************************************************************/

WRITE8_MEMBER(cyclwarr_state::cyclwarr_control_w)
{
	m_control_word = data;

//  if ((m_control_word&0xfe) != (m_last_control&0xfe))
//      logerror("%s  control_w %04x\n", m_maincpu->pc(), data);

/*

0x1 - watchdog
0x4 - cpu bus lock



*/

	if ((m_control_word & 4) == 4 && (m_last_control & 4) == 0)
	{
//      logerror("68k 2 halt\n");
		m_subcpu->set_input_line(INPUT_LINE_HALT, ASSERT_LINE);
	}

	if ((m_control_word & 4) == 0 && (m_last_control & 4) == 4)
	{
//      logerror("68k 2 irq go\n");
		m_subcpu->set_input_line(INPUT_LINE_HALT, CLEAR_LINE);
	}

	m_last_control = m_control_word;
}

/******************************************************************************/

READ16_MEMBER(tatsumi_state::tatsumi_v30_68000_r)
{
	const uint16_t* rom=(uint16_t*)m_subregion->base();

//logerror("%s:68000_r(%04X),cw=%04X\n", m_maincpu->pc(), offset*2, m_control_word);
	/* Read from 68k RAM */
	if ((m_control_word&0x1f)==0x18)
	{
		// hack to make roundup 5 boot
		if (m_maincpu->pc()==0xec575)
		{
			uint8_t *dst = m_mainregion->base();
			dst[BYTE_XOR_LE(0xec57a)]=0x46;
			dst[BYTE_XOR_LE(0xec57b)]=0x46;

			dst[BYTE_XOR_LE(0xfc520)]=0x46; //code that stops cpu after coin counter goes mad..
			dst[BYTE_XOR_LE(0xfc521)]=0x46;
			dst[BYTE_XOR_LE(0xfc522)]=0x46;
			dst[BYTE_XOR_LE(0xfc523)]=0x46;
			dst[BYTE_XOR_LE(0xfc524)]=0x46;
			dst[BYTE_XOR_LE(0xfc525)]=0x46;
		}

		return m_68k_ram[offset & 0x1fff];
	}

	/* Read from 68k ROM */
	offset+=(m_control_word&0x7)*0x8000;

	return rom[offset];
}

WRITE16_MEMBER(tatsumi_state::tatsumi_v30_68000_w)
{
	if ((m_control_word&0x1f)!=0x18)
		logerror("68k write in bank %05x\n",m_control_word);

	COMBINE_DATA(&m_68k_ram[offset]);
}

/***********************************************************************************/

// Todo:  Current YM2151 doesn't seem to raise the busy flag quickly enough for the
// self-test in Tatsumi games.  Needs fixed, but hack it here for now.
READ8_MEMBER(tatsumi_state::tatsumi_hack_ym2151_r)
{
	int r=m_ym2151->status_r(space,0);

	if (m_audiocpu->pc()==0x2aca || m_audiocpu->pc()==0x29fe
		|| m_audiocpu->pc()==0xf9721
		|| m_audiocpu->pc()==0x1b96 || m_audiocpu->pc()==0x1c65) // BigFight
		return 0x80;
	return r;
}

READ8_MEMBER(tatsumi_state::tatsumi_hack_oki_r)
{
	int r=m_oki->read(space,0);

	if (m_audiocpu->pc()==0x2b70 || m_audiocpu->pc()==0x2bb5
		|| m_audiocpu->pc()==0x2acc
		|| m_audiocpu->pc()==0x1c79 // BigFight
		|| m_audiocpu->pc()==0x1cbe // BigFight
		|| m_audiocpu->pc()==0xf9881)
		return 0xf;
	if (m_audiocpu->pc()==0x2ba3 || m_audiocpu->pc()==0x2a9b || m_audiocpu->pc()==0x2adc
		|| m_audiocpu->pc()==0x1cac) // BigFight
		return 0;
	return r;
}