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
|
// license:BSD-3-Clause
// copyright-holders:AJR
/***********************************************************************************************************************************
2017-11-03 Skeleton
Altos II terminal. Green screen.
Chips: Z80A, 2x Z80DART, Z80CTC, X2210D, 2x CRT9006, CRT9007, CRT9021A, 8x 6116
Other: Beeper. Crystals: 4.9152, 8.000, 40.000
Keyboard: P8035L CPU, undumped 2716 labelled "358_2758", XTAL marked "4608-300-107 KSS4C"
************************************************************************************************************************************/
#include "emu.h"
#include "cpu/z80/z80.h"
#include "cpu/z80/z80daisy.h"
#include "machine/z80ctc.h"
#include "machine/z80dart.h"
#include "machine/clock.h"
#include "machine/x2212.h"
//#include "video/crt9007.h"
//#include "video/crt9021.h"
#include "screen.h"
class altos2_state : public driver_device
{
public:
altos2_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_novram(*this, "novram")
, m_p_chargen(*this, "chargen")
, m_p_videoram(*this, "videoram")
{ }
DECLARE_WRITE8_MEMBER(video_mode_w);
u32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
void altos2(machine_config &config);
private:
virtual void machine_reset() override;
required_device<cpu_device> m_maincpu;
required_device<x2210_device> m_novram;
required_region_ptr<u8> m_p_chargen;
required_shared_ptr<u8> m_p_videoram;
};
void altos2_state::machine_reset()
{
m_novram->recall(ASSERT_LINE);
m_novram->recall(CLEAR_LINE);
}
WRITE8_MEMBER(altos2_state::video_mode_w)
{
// D5 = 1 for 132-column mode (6-pixel char width)
// D5 = 0 for 80-column mode (10-pixel char width)
logerror("Writing %02X to mode register at %s\n", data, machine().describe_context());
}
u32 altos2_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
return 0;
}
static ADDRESS_MAP_START( mem_map, AS_PROGRAM, 8, altos2_state )
AM_RANGE(0x0000, 0x3fff) AM_ROM AM_REGION("roms", 0)
AM_RANGE(0xc000, 0xffff) AM_RAM AM_SHARE("videoram")
ADDRESS_MAP_END
static ADDRESS_MAP_START( io_map, AS_IO, 8, altos2_state)
ADDRESS_MAP_GLOBAL_MASK(0xff)
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE(0x00, 0x03) AM_DEVREADWRITE("dart1", z80dart_device, ba_cd_r, ba_cd_w)
AM_RANGE(0x04, 0x07) AM_DEVREADWRITE("dart2", z80dart_device, ba_cd_r, ba_cd_w)
AM_RANGE(0x08, 0x0b) AM_DEVREADWRITE("ctc", z80ctc_device, read, write)
AM_RANGE(0x0c, 0x0c) AM_WRITE(video_mode_w)
AM_RANGE(0x40, 0x7f) AM_DEVREADWRITE("novram", x2210_device, read, write)
//AM_RANGE(0x80, 0xff) AM_DEVREADWRITE_MOD("vpac", crt9007_device, read, write, rshift<1>)
ADDRESS_MAP_END
static INPUT_PORTS_START( altos2 )
INPUT_PORTS_END
static const z80_daisy_config daisy_chain[] =
{
{ "dart1" },
{ "dart2" },
{ "ctc" },
{ nullptr }
};
MACHINE_CONFIG_START(altos2_state::altos2)
/* basic machine hardware */
MCFG_CPU_ADD("maincpu",Z80, XTAL(4'000'000)) // unknown clock
MCFG_CPU_PROGRAM_MAP(mem_map)
MCFG_CPU_IO_MAP(io_map)
MCFG_Z80_DAISY_CHAIN(daisy_chain)
MCFG_DEVICE_ADD("ctc_clock", CLOCK, 4915200) // ctc & dart connections are guesswork
MCFG_CLOCK_SIGNAL_HANDLER(DEVWRITELINE("ctc", z80ctc_device, trg0))
MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("ctc", z80ctc_device, trg1))
MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("ctc", z80ctc_device, trg2))
MCFG_DEVICE_ADD("ctc", Z80CTC, XTAL(4'000'000))
MCFG_Z80CTC_INTR_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0))
MCFG_Z80CTC_ZC0_CB(DEVWRITELINE("dart1", z80dart_device, txca_w))
MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("dart1", z80dart_device, rxca_w))
MCFG_Z80CTC_ZC1_CB(DEVWRITELINE("dart1", z80dart_device, rxtxcb_w))
MCFG_Z80CTC_ZC2_CB(DEVWRITELINE("dart2", z80dart_device, rxca_w))
MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("dart2", z80dart_device, txca_w))
MCFG_DEVICE_ADD("dart1", Z80DART, XTAL(4'000'000))
MCFG_Z80DART_OUT_INT_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0))
MCFG_DEVICE_ADD("dart2", Z80DART, XTAL(4'000'000)) // channel B not used for communications
MCFG_Z80DART_OUT_INT_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0))
MCFG_Z80DART_OUT_DTRB_CB(DEVWRITELINE("novram", x2210_device, store)) MCFG_DEVCB_INVERT // FIXME: no inverter should be needed
MCFG_DEVICE_ADD("novram", X2210, 0)
MCFG_SCREEN_ADD("screen", RASTER)
MCFG_SCREEN_RAW_PARAMS(XTAL(40'000'000) / 2, 960, 0, 800, 347, 0, 325)
MCFG_SCREEN_UPDATE_DRIVER(altos2_state, screen_update)
//MCFG_DEVICE_ADD("vpac", CRT9007, VPAC_CLOCK)
//MCFG_CRT9007_INT_CALLBACK(DEVWRITELINE("ctc", z80ctc_device, trg3))
//MCFG_VIDEO_SET_SCREEN("screen")
MACHINE_CONFIG_END
ROM_START( altos2 )
ROM_REGION( 0x4000, "roms", 0 )
ROM_LOAD( "us_v1.2_15732.u32", 0x0000, 0x2000, CRC(a85f7be0) SHA1(3cfa954c916258d86f7f745d10ec2ff5e33261b3) )
ROM_LOAD( "us_v1.2_15733.u19", 0x2000, 0x2000, CRC(45ebe88a) SHA1(33f16b382a2b365122ebf5e5f7312f8afa45ad15) )
ROM_REGION( 0x2000, "chargen", 0 )
ROM_LOAD( "us_v1.1_14410.u34", 0x0000, 0x2000, CRC(0ebb78bf) SHA1(96a1f7d34ff35037cbbc93049c0e2b9c9f11f1db) )
ROM_END
COMP( 1983, altos2, 0, 0, altos2, altos2, altos2_state, 0, "Altos", "Altos II Terminal", MACHINE_IS_SKELETON )
|