summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/machine/68340.cpp
blob: f65c820ab33b3e1e6f1176ee5698410d9c60c256 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
// license:BSD-3-Clause
// copyright-holders:David Haywood
/* 68340 */

#include "68340.h"




int m68340_calc_cs(m68340cpu_device *m68k, offs_t address)
{
	m68340_sim* sim = m68k->m68340SIM;

	if ( !(sim->m_ba[0] & 1) ) return 1;

	for (int i=0;i<4;i++)
	{
		if (sim->m_ba[i] & 1)
		{
			int mask = ((sim->m_am[i]&0xffffff00) | 0xff);
			int base = sim->m_ba[i] & 0xffffff00;
			int fcmask = (sim->m_am[i] & 0xf0);
			int fcbase = (sim->m_ba[i] & 0xf0) & ~(sim->m_am[i] & 0xf0);
			int fc = m68k->mmu_tmp_fc;

			if ((address & ~mask) == base && ((fc << 4) & ~fcmask ) == fcbase ) return i+1;
		}
	}

	return 0;
}



UINT16 m68340cpu_device::get_cs(offs_t address)
{
	m68340_currentcs = m68340_calc_cs(this, address);

	return m68340_currentcs;
}



/* 68340 specifics - MOVE */

READ32_MEMBER( m68340cpu_device::m68340_internal_base_r )
{
	m68340cpu_device *m68k = this;
	int pc = space.device().safe_pc();
	logerror("%08x m68340_internal_base_r %08x, (%08x)\n", pc, offset*4,mem_mask);
	return m68k->m68340_base;
}

WRITE32_MEMBER( m68340cpu_device::m68340_internal_base_w )
{
	m68340cpu_device *m68k = this;

	int pc = space.device().safe_pc();
	logerror("%08x m68340_internal_base_w %08x, %08x (%08x)\n", pc, offset*4,data,mem_mask);

	// other conditions?
	if (m68k->dfc==0x7)
	{
		// unmap old modules
		if (m68k->m68340_base&1)
		{
			int base = m68k->m68340_base & 0xfffff000;

			m68k->internal->unmap_readwrite(base + 0x000, base + 0x05f);
			m68k->internal->unmap_readwrite(base + 0x600, base + 0x67f);
			m68k->internal->unmap_readwrite(base + 0x700, base + 0x723);
			m68k->internal->unmap_readwrite(base + 0x780, base + 0x7bf);

		}

		COMBINE_DATA(&m68k->m68340_base);
		logerror("%08x m68340_internal_base_w %08x, %08x (%08x) (m68340_base write)\n", pc, offset*4,data,mem_mask);

		// map new modules
		if (m68k->m68340_base&1)
		{
			int base = m68k->m68340_base & 0xfffff000;

			m68k->internal->install_readwrite_handler(base + 0x000, base + 0x03f, read16_delegate(FUNC(m68340cpu_device::m68340_internal_sim_r),this),     write16_delegate(FUNC(m68340cpu_device::m68340_internal_sim_w),this),0xffffffff);
			m68k->internal->install_readwrite_handler(base + 0x010, base + 0x01f, read8_delegate(FUNC(m68340cpu_device::m68340_internal_sim_ports_r),this),write8_delegate(FUNC(m68340cpu_device::m68340_internal_sim_ports_w),this),0xffffffff);
			m68k->internal->install_readwrite_handler(base + 0x040, base + 0x05f, read32_delegate(FUNC(m68340cpu_device::m68340_internal_sim_cs_r),this),  write32_delegate(FUNC(m68340cpu_device::m68340_internal_sim_cs_w),this));
			m68k->internal->install_readwrite_handler(base + 0x600, base + 0x67f, read32_delegate(FUNC(m68340cpu_device::m68340_internal_timer_r),this),   write32_delegate(FUNC(m68340cpu_device::m68340_internal_timer_w),this));
			m68k->internal->install_readwrite_handler(base + 0x700, base + 0x723, read32_delegate(FUNC(m68340cpu_device::m68340_internal_serial_r),this),  write32_delegate(FUNC(m68340cpu_device::m68340_internal_serial_w),this));
			m68k->internal->install_readwrite_handler(base + 0x780, base + 0x7bf, read32_delegate(FUNC(m68340cpu_device::m68340_internal_dma_r),this),     write32_delegate(FUNC(m68340cpu_device::m68340_internal_dma_w),this));

		}

	}
	else
	{
		logerror("%08x m68340_internal_base_w %08x, %04x (%04x) (should fall through?)\n", pc, offset*4,data,mem_mask);
	}



}


static ADDRESS_MAP_START( m68340_internal_map, AS_PROGRAM, 32, m68340cpu_device )
	AM_RANGE(0x0003ff00, 0x0003ff03) AM_READWRITE( m68340_internal_base_r, m68340_internal_base_w)
ADDRESS_MAP_END





m68340cpu_device::m68340cpu_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
	: fscpu32_device(mconfig, "MC68340", tag, owner, clock, M68340, 32,32, ADDRESS_MAP_NAME(m68340_internal_map), "mc68340", __FILE__)
{
	m68340SIM = nullptr;
	m68340DMA = nullptr;
	m68340SERIAL = nullptr;
	m68340TIMER = nullptr;
	m68340_base = 0;
}






void m68340cpu_device::device_reset()
{
	fscpu32_device::device_reset();
}


void m68340cpu_device::device_start()
{
	fscpu32_device::device_start();

	m68340SIM    = new m68340_sim();
	m68340DMA    = new m68340_dma();
	m68340SERIAL = new m68340_serial();
	m68340TIMER  = new m68340_timer();

	m68340SIM->reset();
	m68340DMA->reset();
	m68340SERIAL->reset();
	m68340TIMER->reset();

	start_68340_sim();

	m68340_base = 0x00000000;

	internal = &this->space(AS_PROGRAM);
}