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
153
154
155
156
157
158
|
// license:BSD-3-Clause
// copyright-holders:Sandro Ronco
/***************************************************************************
Axel AX-20
27/12/2011 Skeleton driver.
Hardware description:
- CPU: I8088
- FDC: I8272
- PIT: I8253
- PIC: I8259
Also marketed under the Matra brand as MAX-20 ("M" for Matra ?)
****************************************************************************/
#include "emu.h"
#include "cpu/i86/i86.h"
#include "bus/isa/fdc.h"
class ax20_state : public driver_device
{
public:
ax20_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu"),
m_p_vram(*this, "p_vram"),
m_gfxdecode(*this, "gfxdecode"),
m_palette(*this, "palette"),
m_fdc(*this, "fdc") { }
required_device<cpu_device> m_maincpu;
required_shared_ptr<UINT8> m_p_vram;
required_device<gfxdecode_device> m_gfxdecode;
required_device<palette_device> m_palette;
required_device<i8272a_device> m_fdc;
virtual void machine_start();
UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
DECLARE_READ8_MEMBER(unk_r);
DECLARE_WRITE8_MEMBER(tc_w);
DECLARE_WRITE8_MEMBER(ctl_w);
};
READ8_MEMBER(ax20_state::unk_r)
{
return 0;
}
WRITE8_MEMBER(ax20_state::tc_w)
{
m_fdc->tc_w((data & 0xf0) == 0xf0);
}
WRITE8_MEMBER(ax20_state::ctl_w)
{
m_fdc->subdevice<floppy_connector>("0")->get_device()->mon_w(!(data & 1));
}
UINT32 ax20_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
for ( int y = 0; y < 24; y++ )
{
for ( int x = 0; x < 80; x++ )
{
UINT16 tile = m_p_vram[24 + y * 128 + x ] & 0x7f;
m_gfxdecode->gfx(0)->opaque(bitmap,cliprect, tile, 0, 0, 0, x*8, y*12);
}
}
return 0;
}
static ADDRESS_MAP_START(ax20_map, AS_PROGRAM, 8, ax20_state)
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE(0x00000,0x1ffff) AM_RAM
AM_RANGE(0x20000,0x3ffff) AM_RAM //optional RAM
AM_RANGE(0xf0400,0xf0fff) AM_RAM AM_SHARE("p_vram")
AM_RANGE(0xff800,0xfffff) AM_ROM AM_REGION("ipl", 0)
ADDRESS_MAP_END
static ADDRESS_MAP_START(ax20_io, AS_IO, 8, ax20_state)
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE(0xffc0, 0xffc0) AM_WRITE(tc_w)
AM_RANGE(0xffd0, 0xffd0) AM_WRITE(ctl_w)
AM_RANGE(0xffe0, 0xffe0) AM_READ(unk_r)
AM_RANGE(0xff80, 0xff81) AM_DEVICE("fdc", i8272a_device, map)
ADDRESS_MAP_END
/* Input ports */
static INPUT_PORTS_START( ax20 )
INPUT_PORTS_END
void ax20_state::machine_start()
{
}
static const gfx_layout ax20_charlayout =
{
8, 12,
128,
1,
{ 0 },
{ 4*8+7, 4*8+6, 4*8+5, 4*8+4, 4*8+3, 4*8+2, 4*8+1, 4*8+0 },
{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8, 8*8, 8*9, 8*10, 8*11 },
8*16
};
static GFXDECODE_START( ax20 )
GFXDECODE_ENTRY( "chargen", 0x0000, ax20_charlayout, 0, 1 )
GFXDECODE_END
static SLOT_INTERFACE_START( ax20_floppies )
SLOT_INTERFACE( "525dd", FLOPPY_525_DD )
SLOT_INTERFACE_END
static MACHINE_CONFIG_START( ax20, ax20_state )
/* basic machine hardware */
MCFG_CPU_ADD("maincpu", I8088, XTAL_14_31818MHz/3)
MCFG_CPU_PROGRAM_MAP(ax20_map)
MCFG_CPU_IO_MAP(ax20_io)
/* video hardware */
MCFG_SCREEN_ADD("screen", RASTER)
MCFG_SCREEN_REFRESH_RATE(50)
MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
MCFG_SCREEN_UPDATE_DRIVER(ax20_state, screen_update)
MCFG_SCREEN_SIZE(80*8, 24*12)
MCFG_SCREEN_VISIBLE_AREA(0, 80*8-1, 0, 24*12-1)
MCFG_SCREEN_PALETTE("palette")
MCFG_GFXDECODE_ADD("gfxdecode", "palette", ax20)
MCFG_PALETTE_ADD_MONOCHROME_GREEN("palette")
MCFG_I8272A_ADD("fdc", true)
/* Devices */
MCFG_FLOPPY_DRIVE_ADD("fdc:0", ax20_floppies, "525dd", isa8_fdc_device::floppy_formats)
MACHINE_CONFIG_END
/* ROM definition */
ROM_START( ax20 )
ROM_REGION( 0x0800, "ipl", 0 )
ROM_LOAD( "ax20-s.rom", 0x0000, 0x0800, CRC(f11f95b9) SHA1(59949332dd431fcf8211c2d556e1f49351e90750))
ROM_REGION( 0x4000, "chargen", 0 )
ROM_LOAD( "ax20-g.rom", 0x0000, 0x0800, CRC(90bcef80) SHA1(922067fd7316de9e69b9600c793ada5c87197eeb))
ROM_END
/* Driver */
/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */
COMP( 1982, ax20, 0, 0, ax20, ax20, driver_device, 0, "Axel", "AX-20", GAME_NOT_WORKING | GAME_NO_SOUND)
|