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
|
// license:BSD-3-Clause
// copyright-holders:Miodrag Milanovic, Robbbert
/***************************************************************************
Robotron K8915
30/08/2010 Skeleton driver
When it says DIAGNOSTIC RAZ P, press enter.
****************************************************************************/
#include "emu.h"
#include "cpu/z80/z80.h"
#include "machine/keyboard.h"
#define KEYBOARD_TAG "keyboard"
class k8915_state : public driver_device
{
public:
k8915_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu"),
m_p_videoram(*this, "p_videoram")
{
}
required_device<cpu_device> m_maincpu;
DECLARE_READ8_MEMBER( k8915_52_r );
DECLARE_READ8_MEMBER( k8915_53_r );
DECLARE_WRITE8_MEMBER( k8915_a8_w );
DECLARE_WRITE8_MEMBER( kbd_put );
required_shared_ptr<UINT8> m_p_videoram;
UINT8 *m_p_chargen;
UINT8 m_framecnt;
UINT8 m_term_data;
virtual void machine_reset();
virtual void video_start();
UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
DECLARE_DRIVER_INIT(k8915);
};
READ8_MEMBER( k8915_state::k8915_52_r )
{
// get data from ascii keyboard
UINT8 ret = m_term_data;
m_term_data = 0;
return ret;
}
READ8_MEMBER( k8915_state::k8915_53_r )
{
// keyboard status
return m_term_data ? 1 : 0;
}
WRITE8_MEMBER( k8915_state::k8915_a8_w )
{
// seems to switch ram and rom around.
if (data == 0x87)
membank("boot")->set_entry(0); // ram at 0000
else
membank("boot")->set_entry(1); // rom at 0000
}
static ADDRESS_MAP_START(k8915_mem, AS_PROGRAM, 8, k8915_state)
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE(0x0000, 0x0fff) AM_RAMBANK("boot")
AM_RANGE(0x1000, 0x17ff) AM_RAM AM_SHARE("p_videoram")
AM_RANGE(0x1800, 0xffff) AM_RAM
ADDRESS_MAP_END
static ADDRESS_MAP_START(k8915_io, AS_IO, 8, k8915_state)
ADDRESS_MAP_GLOBAL_MASK(0xff)
AM_RANGE(0x52, 0x52) AM_READ(k8915_52_r)
AM_RANGE(0x53, 0x53) AM_READ(k8915_53_r)
AM_RANGE(0xa8, 0xa8) AM_WRITE(k8915_a8_w)
ADDRESS_MAP_END
/* Input ports */
static INPUT_PORTS_START( k8915 )
INPUT_PORTS_END
void k8915_state::machine_reset()
{
membank("boot")->set_entry(1);
}
DRIVER_INIT_MEMBER(k8915_state,k8915)
{
UINT8 *RAM = memregion("maincpu")->base();
membank("boot")->configure_entries(0, 2, &RAM[0x0000], 0x10000);
}
void k8915_state::video_start()
{
m_p_chargen = memregion("chargen")->base();
}
UINT32 k8915_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
UINT8 y,ra,chr,gfx;
UINT16 sy=0,ma=0,x;
m_framecnt++;
for (y = 0; y < 25; y++)
{
for (ra = 0; ra < 10; ra++)
{
UINT16 *p = &bitmap.pix16(sy++);
for (x = ma; x < ma + 80; x++)
{
gfx = 0;
if (ra < 9)
{
chr = m_p_videoram[x];
/* Take care of flashing characters */
if ((chr & 0x80) && (m_framecnt & 0x08))
chr = 0x20;
chr &= 0x7f;
gfx = m_p_chargen[(chr<<4) | ra ];
}
/* Display a scanline of a character */
*p++ = BIT(gfx, 7);
*p++ = BIT(gfx, 6);
*p++ = BIT(gfx, 5);
*p++ = BIT(gfx, 4);
*p++ = BIT(gfx, 3);
*p++ = BIT(gfx, 2);
*p++ = BIT(gfx, 1);
*p++ = BIT(gfx, 0);
}
}
ma+=80;
}
return 0;
}
WRITE8_MEMBER( k8915_state::kbd_put )
{
m_term_data = data;
}
static MACHINE_CONFIG_START( k8915, k8915_state )
/* basic machine hardware */
MCFG_CPU_ADD("maincpu", Z80, XTAL_16MHz / 4)
MCFG_CPU_PROGRAM_MAP(k8915_mem)
MCFG_CPU_IO_MAP(k8915_io)
/* video hardware */
MCFG_SCREEN_ADD("screen", RASTER)
MCFG_SCREEN_REFRESH_RATE(60)
MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
MCFG_SCREEN_UPDATE_DRIVER(k8915_state, screen_update)
MCFG_SCREEN_SIZE(640, 250)
MCFG_SCREEN_VISIBLE_AREA(0, 639, 0, 249)
MCFG_SCREEN_PALETTE("palette")
MCFG_PALETTE_ADD_MONOCHROME_GREEN("palette")
MCFG_DEVICE_ADD(KEYBOARD_TAG, GENERIC_KEYBOARD, 0)
MCFG_GENERIC_KEYBOARD_CB(WRITE8(k8915_state, kbd_put))
MACHINE_CONFIG_END
/* ROM definition */
ROM_START( k8915 )
ROM_REGION( 0x11000, "maincpu", ROMREGION_ERASEFF )
ROM_LOAD( "k8915.bin", 0x10000, 0x1000, CRC(ca70385f) SHA1(a34c14adae9be821678aed7f9e33932ee1f3e61c))
/* character generator not dumped, using the one from 'c10' for now */
ROM_REGION( 0x2000, "chargen", 0 )
ROM_LOAD( "c10_char.bin", 0x0000, 0x2000, BAD_DUMP CRC(cb530b6f) SHA1(95590bbb433db9c4317f535723b29516b9b9fcbf))
ROM_END
/* Driver */
/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */
COMP( 1982, k8915, 0, 0, k8915, k8915, k8915_state, k8915, "Robotron", "K8915", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)
|