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
|
// license:BSD-3-Clause
// copyright-holders:AJR, Angelo Salese
/****************************************************************************
Toshiba Pasopia Kanji ROM PAC2 emulation
TODO: find out the difference between PA7246 and PA7247 (which one
is actually dumped here?)
****************************************************************************/
#include "emu.h"
#include "rompac2.h"
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
// device type definition
DEFINE_DEVICE_TYPE(PASOPIA_PA7246, pasopia_pa7246_device, "pa7246", "PA7246 Pasopia Kanji ROM PAC2")
//**************************************************************************
// DEVICE DEFINITION
//**************************************************************************
//-------------------------------------------------
// pasopia_pa7246_device - construction
//-------------------------------------------------
pasopia_pa7246_device::pasopia_pa7246_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
: device_t(mconfig, PASOPIA_PA7246, tag, owner, clock)
, pac2_card_interface(mconfig, *this)
, m_kanji_rom(*this, "kanji")
, m_kanji_index(0)
{
}
ROM_START(pa7246)
ROM_REGION(0x20000, "kanji", 0)
ROM_LOAD("kanji.rom", 0x00000, 0x20000, CRC(6109e308) SHA1(5c21cf1f241ef1fa0b41009ea41e81771729785f))
ROM_END
//-------------------------------------------------
// device_rom_region - return a pointer to the
// rom region description for this device
//-------------------------------------------------
const tiny_rom_entry *pasopia_pa7246_device::device_rom_region() const
{
return ROM_NAME(pa7246);
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void pasopia_pa7246_device::device_start()
{
save_item(NAME(m_kanji_index));
}
//**************************************************************************
// PAC2 INTERFACE
//**************************************************************************
//-------------------------------------------------
// pac2_read - I/O read access
//-------------------------------------------------
u8 pasopia_pa7246_device::pac2_read(offs_t offset)
{
return m_kanji_rom[m_kanji_index];
}
//-------------------------------------------------
// pac2_write - I/O write access
//-------------------------------------------------
void pasopia_pa7246_device::pac2_write(offs_t offset, u8 data)
{
switch (offset)
{
case 0:
m_kanji_index = (m_kanji_index & 0x1ff00) | ((data & 0xff) << 0);
break;
case 1:
m_kanji_index = (m_kanji_index & 0x100ff) | ((data & 0xff) << 8);
break;
case 2:
m_kanji_index = (m_kanji_index & 0x0ffff) | ((data & 0x01) << 16);
break;
}
}
|