summaryrefslogtreecommitdiffstatshomepage
path: root/src/mess/drivers/mbc55x.c
blob: 602eb146c8a038afb8b269faeb64b4b47365d36e (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
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
// license:BSD-3-Clause
// copyright-holders:Phill Harvey-Smith
/*
    drivers/mbc55x.c

    Machine driver for the Sanyo MBC-550 and MBC-555.

    Phill Harvey-Smith
    2011-01-29.


ToDo:
- Fix the sound
- Add serial uart

*/


#include "includes/mbc55x.h"


const unsigned char mbc55x_palette[SCREEN_NO_COLOURS][3] =
{
	/*normal brightness */
	{ 0x00,0x00,0x00 }, /* black */
	{ 0x00,0x00,0x80 }, /* blue */
	{ 0x00,0x80,0x00 }, /* green */
	{ 0x00,0x80,0x80 }, /* cyan */
	{ 0x80,0x00,0x00 }, /* red */
	{ 0x80,0x00,0x80 }, /* magenta */
	{ 0x80,0x80,0x00 }, /* yellow */
	{ 0x80,0x80,0x80 }, /* light grey */
};


static ADDRESS_MAP_START(mbc55x_mem, AS_PROGRAM, 8, mbc55x_state)
	AM_RANGE( 0x00000, 0x0FFFF ) AM_RAMBANK(RAM_BANK00_TAG)
	AM_RANGE( 0x10000, 0x1FFFF ) AM_RAMBANK(RAM_BANK01_TAG)
	AM_RANGE( 0x20000, 0x2FFFF ) AM_RAMBANK(RAM_BANK02_TAG)
	AM_RANGE( 0x30000, 0x3FFFF ) AM_RAMBANK(RAM_BANK03_TAG)
	AM_RANGE( 0x40000, 0x4FFFF ) AM_RAMBANK(RAM_BANK04_TAG)
	AM_RANGE( 0x50000, 0x5FFFF ) AM_RAMBANK(RAM_BANK05_TAG)
	AM_RANGE( 0x60000, 0x6FFFF ) AM_RAMBANK(RAM_BANK06_TAG)
	AM_RANGE( 0x70000, 0x7FFFF ) AM_RAMBANK(RAM_BANK07_TAG)
	AM_RANGE( 0x80000, 0x8FFFF ) AM_RAMBANK(RAM_BANK08_TAG)
	AM_RANGE( 0x90000, 0x9FFFF ) AM_RAMBANK(RAM_BANK09_TAG)
	AM_RANGE( 0xA0000, 0xAFFFF ) AM_RAMBANK(RAM_BANK0A_TAG)
	AM_RANGE( 0xB0000, 0xBFFFF ) AM_RAMBANK(RAM_BANK0B_TAG)
	AM_RANGE( 0xC0000, 0xCFFFF ) AM_RAMBANK(RAM_BANK0C_TAG)
	AM_RANGE( 0xD0000, 0xDFFFF ) AM_RAMBANK(RAM_BANK0D_TAG)
	AM_RANGE( 0xE0000, 0xEFFFF ) AM_RAMBANK(RAM_BANK0E_TAG)
	AM_RANGE( 0xF0000, 0xF3FFF ) AM_RAMBANK(RED_PLANE_TAG)
	AM_RANGE( 0xF4000, 0xF7FFF ) AM_RAMBANK(BLUE_PLANE_TAG)
	AM_RANGE( 0xF8000, 0xFBFFF ) AM_NOP
	AM_RANGE( 0xFC000, 0xFFFFF ) AM_ROM AM_WRITENOP AM_REGION(MAINCPU_TAG, 0x0000) AM_MIRROR(0x002000)
ADDRESS_MAP_END

static ADDRESS_MAP_START(mbc55x_io, AS_IO, 8, mbc55x_state)
	ADDRESS_MAP_GLOBAL_MASK(0xff)
	AM_RANGE( 0X0000, 0X0003) AM_READWRITE(mbcpic8259_r, mbcpic8259_w)
	AM_RANGE( 0x0008, 0x000F) AM_READWRITE(mbc55x_disk_r, mbc55x_disk_w)
	AM_RANGE( 0X0010, 0X0010) AM_READWRITE( vram_page_r, vram_page_w)
	AM_RANGE( 0x0018, 0x001F) AM_READWRITE( ppi8255_r, ppi8255_w)
	AM_RANGE( 0X0020, 0X0027) AM_READWRITE(mbcpit8253_r, mbcpit8253_w)
	AM_RANGE( 0x0028, 0x002B) AM_READWRITE( mbc55x_usart_r, mbc55x_usart_w)
	AM_RANGE( 0x0030, 0x0031) AM_DEVREADWRITE(VID_MC6845_NAME, mc6845_device, status_r, address_w )
	AM_RANGE( 0x0032, 0x0033) AM_DEVREADWRITE(VID_MC6845_NAME, mc6845_device, register_r, register_w )
	AM_RANGE( 0x0038, 0x003B) AM_READWRITE(mbc55x_kb_usart_r, mbc55x_kb_usart_w)
ADDRESS_MAP_END

static INPUT_PORTS_START( mbc55x )
	PORT_START("KEY0") /* Key row 0 scancodes 00..07 */
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("1")      PORT_CODE(KEYCODE_1)            PORT_CHAR('1')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("2")      PORT_CODE(KEYCODE_2)            PORT_CHAR('2')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("3")      PORT_CODE(KEYCODE_3)            PORT_CHAR('3')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("4")      PORT_CODE(KEYCODE_4)            PORT_CHAR('4')
	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("5")      PORT_CODE(KEYCODE_5)            PORT_CHAR('5')
	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("6")      PORT_CODE(KEYCODE_6)            PORT_CHAR('6')
	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("7")      PORT_CODE(KEYCODE_7)            PORT_CHAR('7')
	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("8")      PORT_CODE(KEYCODE_8)            PORT_CHAR('8')

	PORT_START("KEY1") /* Key row 1 scancodes 08..0F */
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("9")      PORT_CODE(KEYCODE_9)            PORT_CHAR('9')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("0")      PORT_CODE(KEYCODE_0)            PORT_CHAR('0')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("-")      PORT_CODE(KEYCODE_MINUS)        PORT_CHAR('-')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("=")      PORT_CODE(KEYCODE_EQUALS)       PORT_CHAR('=')
	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("BSLASH") PORT_CODE(KEYCODE_BACKSLASH)    PORT_CHAR('\\')
	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Q")      PORT_CODE(KEYCODE_Q)            PORT_CHAR('Q')
	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("W")      PORT_CODE(KEYCODE_W)            PORT_CHAR('W')
	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("E")      PORT_CODE(KEYCODE_E)            PORT_CHAR('E')

	PORT_START("KEY2") /* Key row 2 scancodes 10..17 */
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("R")      PORT_CODE(KEYCODE_R)            PORT_CHAR('R')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("T")      PORT_CODE(KEYCODE_T)            PORT_CHAR('T')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Y")      PORT_CODE(KEYCODE_Y)            PORT_CHAR('Y')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("U")      PORT_CODE(KEYCODE_U)            PORT_CHAR('U')
	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("I")      PORT_CODE(KEYCODE_I)            PORT_CHAR('I')
	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("O")      PORT_CODE(KEYCODE_O)            PORT_CHAR('O')
	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("P")      PORT_CODE(KEYCODE_P)            PORT_CHAR('P')
	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("[")      PORT_CODE(KEYCODE_OPENBRACE)    PORT_CHAR('[')


	PORT_START("KEY3") /* Key row 3 scancodes 18..1F */
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("]")      PORT_CODE(KEYCODE_CLOSEBRACE)   PORT_CHAR(']')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("A")      PORT_CODE(KEYCODE_A)            PORT_CHAR('A')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("S")      PORT_CODE(KEYCODE_S)            PORT_CHAR('S')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("D")      PORT_CODE(KEYCODE_D)            PORT_CHAR('D')
	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F")      PORT_CODE(KEYCODE_F)            PORT_CHAR('F')
	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("G")      PORT_CODE(KEYCODE_G)            PORT_CHAR('G')
	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("H")      PORT_CODE(KEYCODE_H)            PORT_CHAR('H')
	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("J")      PORT_CODE(KEYCODE_J)            PORT_CHAR('J')

	PORT_START("KEY4") /* Key row 4 scancodes 20..27 */
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("K")      PORT_CODE(KEYCODE_K)            PORT_CHAR('K')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("L")      PORT_CODE(KEYCODE_L)            PORT_CHAR('L')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME(";")      PORT_CODE(KEYCODE_COLON)        PORT_CHAR(';')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("TILDE")  PORT_CODE(KEYCODE_TILDE)        PORT_CHAR('`')
	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("#")      PORT_CODE(KEYCODE_QUOTE)        PORT_CHAR('#')
	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("ENTER")  PORT_CODE(KEYCODE_ENTER)        PORT_CHAR(0x0D)
	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Z")      PORT_CODE(KEYCODE_Z)            PORT_CHAR('Z')
	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("X")      PORT_CODE(KEYCODE_X)            PORT_CHAR('X')


	PORT_START("KEY5") /* Key row 5 scancodes 28..2F */
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("C")      PORT_CODE(KEYCODE_C)            PORT_CHAR('C')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("V")      PORT_CODE(KEYCODE_V)            PORT_CHAR('V')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("B")      PORT_CODE(KEYCODE_B)            PORT_CHAR('B')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("N")      PORT_CODE(KEYCODE_N)            PORT_CHAR('N')
	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("M")      PORT_CODE(KEYCODE_M)            PORT_CHAR('M')
	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME(",")      PORT_CODE(KEYCODE_COMMA)        PORT_CHAR(',')
	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME(".")      PORT_CODE(KEYCODE_STOP)         PORT_CHAR('.')
	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("/")      PORT_CODE(KEYCODE_SLASH)        PORT_CHAR('/')

	PORT_START("KEY6") /* Key row 6 scancodes 30..37 */
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("SPACE")  PORT_CODE(KEYCODE_SPACE)        PORT_CHAR(' ')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED)
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNUSED)
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNUSED)
	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED)
	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED)
	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED)
	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED)

#if 0
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("BACKSLASH") PORT_CODE(KEYCODE_BACKSLASH)    PORT_CHAR('\\')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("LSHIFT") PORT_CODE(KEYCODE_LSHIFT)       PORT_CHAR(UCHAR_SHIFT_1)

	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("CTRL")   PORT_CODE(KEYCODE_LCONTROL)     PORT_CODE(KEYCODE_RCONTROL) // Ether control

	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("RSHIFT") PORT_CODE(KEYCODE_RSHIFT)       PORT_CHAR(UCHAR_SHIFT_2)
	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("PRSCR")  PORT_CODE(KEYCODE_ASTERISK)     PORT_CHAR('*')

	PORT_START("KEY7") /* Key row 7 scancodes 38..3F */
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("ALT")    PORT_CODE(KEYCODE_LALT)         PORT_CODE(KEYCODE_RALT)
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("CAPS")   PORT_CODE(KEYCODE_CAPSLOCK)
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F1")     PORT_CODE(KEYCODE_F1)
	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F2")     PORT_CODE(KEYCODE_F2)
	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F3")     PORT_CODE(KEYCODE_F3)
	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F4")     PORT_CODE(KEYCODE_F4)
	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F5")     PORT_CODE(KEYCODE_F5)

	PORT_START("KEY8") /* Key row 8 scancodes 40..47 */
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F6")     PORT_CODE(KEYCODE_F6)
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F7")     PORT_CODE(KEYCODE_F7)
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F8")     PORT_CODE(KEYCODE_F8)
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F9")     PORT_CODE(KEYCODE_F9)
	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F10")    PORT_CODE(KEYCODE_F10)
	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("NUMLK")  PORT_CODE(KEYCODE_NUMLOCK)
	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("SCRLK")  PORT_CODE(KEYCODE_SCRLOCK)
	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("KP7")    PORT_CODE(KEYCODE_7_PAD)        PORT_CHAR('7')

	PORT_START("KEY9") /* Key row 9 scancodes 48..4F */
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("KP8")    PORT_CODE(KEYCODE_8_PAD)        //PORT_CHAR('8')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("KP9")    PORT_CODE(KEYCODE_9_PAD)        //PORT_CHAR('9')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("KP-")    PORT_CODE(KEYCODE_MINUS_PAD)    //PORT_CHAR('-')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("KP4")    PORT_CODE(KEYCODE_4_PAD)        //PORT_CHAR('4')
	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("KP5")    PORT_CODE(KEYCODE_5_PAD)        //PORT_CHAR('5')
	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("KP6")    PORT_CODE(KEYCODE_6_PAD)        //PORT_CHAR('6')
	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("KP+")    PORT_CODE(KEYCODE_PLUS_PAD)     //PORT_CHAR('+')
	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("KP1")    PORT_CODE(KEYCODE_1_PAD)        //PORT_CHAR('1')

	PORT_START("KEY10") /* Key row 10 scancodes 50..57 */
	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("KP2")    PORT_CODE(KEYCODE_2_PAD)        //PORT_CHAR('2')
	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("KP3")    PORT_CODE(KEYCODE_3_PAD)        //PORT_CHAR('3')
	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("KP0")    PORT_CODE(KEYCODE_0_PAD)        //PORT_CHAR('0')
	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("KP.")    PORT_CODE(KEYCODE_DEL_PAD)      //PORT_CHAR('.')
	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED)
	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED)
	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED)
	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED)
	//PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("KP5")    PORT_CODE(KEYCODE_5_PAD)        PORT_CHAR('5')
	//PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("KP6")    PORT_CODE(KEYCODE_6_PAD)        PORT_CHAR('6')
	//PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("KP+")    PORT_CODE(KEYCODE_PLUS_PAD)     PORT_CHAR('+')
	//PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("KP1")    PORT_CODE(KEYCODE_1_PAD)        PORT_CHAR('1')
#endif

	PORT_START(KEY_SPECIAL_TAG)
	PORT_BIT(KEY_BIT_LSHIFT,    IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("LSHIFT") PORT_CODE(KEYCODE_LSHIFT)       PORT_CHAR(UCHAR_SHIFT_1)
	PORT_BIT(KEY_BIT_RSHIFT,    IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("RSHIFT") PORT_CODE(KEYCODE_RSHIFT)       PORT_CHAR(UCHAR_SHIFT_2)
	PORT_BIT(KEY_BIT_CTRL,      IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("CTRL")   PORT_CODE(KEYCODE_LCONTROL)     PORT_CODE(KEYCODE_RCONTROL) // Ether control
	PORT_BIT(KEY_BIT_GRAPH,     IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("GRAPH")  PORT_CODE(KEYCODE_LALT)         PORT_CODE(KEYCODE_RALT)
	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED)
	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED)
	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED)
	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED)

INPUT_PORTS_END


PALETTE_INIT_MEMBER(mbc55x_state, mbc55x)
{
	int colourno;

	logerror("initializing palette\n");

	for ( colourno = 0; colourno < SCREEN_NO_COLOURS; colourno++ )
		palette.set_pen_color(colourno, mbc55x_palette[colourno][RED], mbc55x_palette[colourno][GREEN], mbc55x_palette[colourno][BLUE]);
}


FLOPPY_FORMATS_MEMBER( mbc55x_state::floppy_formats )
	FLOPPY_PC_FORMAT
FLOPPY_FORMATS_END


// MBC-550 : 1 x 5.25" disk-drive (160 KB)
// MBC-555 : 2 x 5.25" disk-drive (160 KB)
// MBC-555-2 : 2 x 5.25" disk-drive (360 KB)
// MBC-555-3 : 2 x 5.25" disk-drive (720 KB)

static SLOT_INTERFACE_START( mbc55x_floppies )
	SLOT_INTERFACE("ssdd", FLOPPY_525_SSDD)
	SLOT_INTERFACE("dd", FLOPPY_525_DD)
	SLOT_INTERFACE("qd", FLOPPY_525_QD)
SLOT_INTERFACE_END


static MACHINE_CONFIG_START( mbc55x, mbc55x_state )
	/* basic machine hardware */
	MCFG_CPU_ADD(MAINCPU_TAG, I8088, 3600000)
	MCFG_CPU_PROGRAM_MAP(mbc55x_mem)
	MCFG_CPU_IO_MAP(mbc55x_io)
	MCFG_CPU_IRQ_ACKNOWLEDGE_DEVICE(PIC8259_TAG, pic8259_device, inta_cb)

	/* video hardware */
	MCFG_SCREEN_ADD(SCREEN_TAG, RASTER)
	MCFG_SCREEN_RAW_PARAMS(XTAL_14_31818MHz,896,0,300,262,0,200)
	MCFG_SCREEN_UPDATE_DEVICE(VID_MC6845_NAME, mc6845_device, screen_update)
	MCFG_SCREEN_VBLANK_DRIVER(mbc55x_state, screen_eof_mbc55x)

	MCFG_PALETTE_ADD("palette", SCREEN_NO_COLOURS * 3)
	MCFG_PALETTE_INIT_OWNER(mbc55x_state, mbc55x)
//  MCFG_SCREEN_SIZE(650, 260)
//  MCFG_SCREEN_VISIBLE_AREA(0, 639, 0, 249)

	MCFG_RAM_ADD(RAM_TAG)
	MCFG_RAM_DEFAULT_SIZE("128K")
	MCFG_RAM_EXTRA_OPTIONS("128K,192K,256K,320K,384K,448K,512K,576K,640K")

	/* sound hardware */
	MCFG_SPEAKER_STANDARD_MONO(MONO_TAG)
	MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS,MONO_TAG, 0.75)

	/* Devices */
	MCFG_DEVICE_ADD(I8251A_KB_TAG, I8251, 0)
	MCFG_I8251_RXRDY_HANDLER(DEVWRITELINE(PIC8259_TAG, pic8259_device, ir3_w))

	MCFG_DEVICE_ADD(PIT8253_TAG, PIT8253, 0)
	MCFG_PIT8253_CLK0(PIT_C0_CLOCK)
	MCFG_PIT8253_OUT0_HANDLER(DEVWRITELINE(PIC8259_TAG, pic8259_device, ir0_w))
	MCFG_PIT8253_CLK1(PIT_C1_CLOCK)
	MCFG_PIT8253_OUT1_HANDLER(DEVWRITELINE(PIC8259_TAG, pic8259_device, ir1_w))
	MCFG_PIT8253_CLK2(PIT_C2_CLOCK)
	MCFG_PIT8253_OUT2_HANDLER(WRITELINE(mbc55x_state, pit8253_t2))

	MCFG_PIC8259_ADD( PIC8259_TAG, INPUTLINE(MAINCPU_TAG, INPUT_LINE_IRQ0), VCC, NULL )

	MCFG_DEVICE_ADD(PPI8255_TAG, I8255, 0)
	MCFG_I8255_IN_PORTA_CB(READ8(mbc55x_state, mbc55x_ppi_porta_r))
	MCFG_I8255_OUT_PORTA_CB(WRITE8(mbc55x_state, mbc55x_ppi_porta_w))
	MCFG_I8255_IN_PORTB_CB(READ8(mbc55x_state, mbc55x_ppi_portb_r))
	MCFG_I8255_OUT_PORTB_CB(WRITE8(mbc55x_state, mbc55x_ppi_portb_w))
	MCFG_I8255_IN_PORTC_CB(READ8(mbc55x_state, mbc55x_ppi_portc_r))
	MCFG_I8255_OUT_PORTC_CB(WRITE8(mbc55x_state, mbc55x_ppi_portc_w))

	MCFG_MC6845_ADD(VID_MC6845_NAME, MC6845, SCREEN_TAG, XTAL_14_31818MHz/8)
	MCFG_MC6845_SHOW_BORDER_AREA(false)
	MCFG_MC6845_CHAR_WIDTH(8)
	MCFG_MC6845_UPDATE_ROW_CB(mbc55x_state, crtc_update_row)
	MCFG_MC6845_OUT_VSYNC_CB(WRITELINE(mbc55x_state, vid_hsync_changed))
	MCFG_MC6845_OUT_HSYNC_CB(WRITELINE(mbc55x_state, vid_vsync_changed))

	/* Backing storage */
	MCFG_FD1793_ADD(FDC_TAG, XTAL_1MHz)

	MCFG_FLOPPY_DRIVE_ADD(FDC_TAG ":0", mbc55x_floppies, "qd", mbc55x_state::floppy_formats)
	MCFG_FLOPPY_DRIVE_ADD(FDC_TAG ":1", mbc55x_floppies, "qd", mbc55x_state::floppy_formats)
	MCFG_FLOPPY_DRIVE_ADD(FDC_TAG ":2", mbc55x_floppies, "", mbc55x_state::floppy_formats)
	MCFG_FLOPPY_DRIVE_ADD(FDC_TAG ":3", mbc55x_floppies, "", mbc55x_state::floppy_formats)

	/* Software list */
	MCFG_SOFTWARE_LIST_ADD("disk_list","mbc55x")
MACHINE_CONFIG_END


ROM_START( mbc55x )
	ROM_REGION( 0x4000, MAINCPU_TAG, 0 )

	ROM_SYSTEM_BIOS(0, "v120", "mbc55x BIOS v1.20 (1983)")
	ROMX_LOAD("mbc55x-v120.rom", 0x0000, 0x2000, CRC(b439b4b8) SHA1(6e8df0f3868e3fd0229a5c2720d6c01e46815cab), ROM_BIOS(1)  )
ROM_END


/*    YEAR  NAME        PARENT  COMPAT  MACHINE INPUT   INIT  COMPANY  FULLNAME   FLAGS */
COMP( 1983, mbc55x,     0,      0,      mbc55x, mbc55x, driver_device, 0,   "Sanyo",  "MBC-55x",  0 /*MACHINE_NO_SOUND*/)