// license:BSD-3-Clause
// copyright-holders:Miodrag Milanovic
/***************************************************************************
AC1 video driver by Miodrag Milanovic
15/01/2009 Preliminary driver.
24/02/2011 Added cassette support ('ac1' and 'ac1_32' only)
Note that Z command will get you into BASIC, and BYE command
takes you back to the Monitor.
S xxxx yyyy = to save memory to tape.
L = to load it back in.
Since there is no motor control, type in L then mount the tape.
****************************************************************************/
#include "emu.h"
#include "cpu/z80/z80.h"
#include "imagedev/cassette.h"
#include "machine/z80pio.h"
#include "machine/z80ctc.h"
#include "screen.h"
#include "speaker.h"
#include "sound/spkrdev.h"
#include "emupal.h"
class ac1_state : public driver_device
{
public:
ac1_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_cassette(*this, "cassette")
, m_maincpu(*this, "maincpu")
, m_vram(*this, "videoram")
, m_gfxdecode(*this, "gfxdecode")
, m_palette(*this, "palette")
, m_speaker(*this, "speaker")
, m_io_line(*this, "LINE.%u", 0U)
{ }
void ac1(machine_config &config);
void ac1_32(machine_config &config);
void ac1scch(machine_config &config);
void init_upper();
void init_lower();
private:
u32 screen_update_ac1(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
u32 screen_update_ac1_32(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
u8 ac1_port_b_r();
u8 ac1_port_a_r();
bool has_lowercase;
void machine_start() override;
void ac1_port_a_w(u8 data);
void ac1_port_b_w(u8 data);
void ac1_32_mem(address_map &map);
void ac1_io(address_map &map);
void ac1scch_io(address_map &map);
void ac1_mem(address_map &map);
required_device<cassette_image_device> m_cassette;
required_device<cpu_device> m_maincpu;
required_shared_ptr<u8> m_vram;
required_device<gfxdecode_device> m_gfxdecode;
required_device<palette_device> m_palette;
required_device<speaker_sound_device> m_speaker;
required_ioport_array<7> m_io_line;
};
u8 ac1_state::ac1_port_b_r()
{
u8 data = 0x7f;
if (m_cassette->input() > 0.03)
data |= 0x80;
return data;
}
// standard ascii keyboard with bit 7 high
u8 ac1_state::ac1_port_a_r()
{
u8 line[7] = { 0,0,0,0,0,0,0} ;
line[6] = m_io_line[6]->read();
if (BIT(line[6], 2,3))
{
if (BIT(line[6], 2))
return 0xa0; // space
if (BIT(line[6], 3))
return 0x8d; // enter
if (BIT(line[6], 4))
return 0x88; // backspace
}
bool SH = BIT(line[6],0);
u8 i;
line[0] = m_io_line[0]->read();
if (line[0])
for (i = 0; i < 8; i++)
if (BIT(line[0], i))
return (SH) ? 0xa0+i : 0xb0+i;
line[1] = m_io_line[1]->read();
if (line[1])
{
for (i = 0; i < 4; i++)
if (BIT(line[1], i))
return (SH) ? 0xa8+i : 0xb8+i;
for (i = 4; i < 8; i++)
if (BIT(line[1], i))
return (SH) ? 0xb8+i : 0xa8+i;
}
bool CTRL = BIT(line[6],1);
line[2] = m_io_line[2]->read();
line[3] = m_io_line[3]->read();
line[4] = m_io_line[4]->read();
line[5] = m_io_line[5]->read();
if (!has_lowercase)
{
SH = false;
CTRL = false;
}
for (u8 j = 2; j < 6; j++)
for (i = 0; i < 8; i++)
if (BIT(line[j], i))
{
u8 k = 0x70 + i + j*8;
return (CTRL) ? k : ((SH) ? k+0x60 : k+0x40);
}
return 0; // no key pressed
}
void ac1_state::ac1_port_a_w(u8 data)
{
}
void ac1_state::ac1_port_b_w(u8 data)
{
/*
bit description
0
1 RTTY receive
2 RTTY transmit
3 RTTY PTT
4
5
6 cassette out
7 cassette in
*/
m_speaker->level_w(BIT(data, 0));
m_cassette->output(BIT(data, 6) ? -1.0 : +1.0);
}
/* Address maps */
void ac1_state::ac1_mem(address_map &map)
{
map.unmap_value_high();
map(0x0000, 0x07ff).rom(); // Monitor
map(0x0800, 0x0fff).rom(); // BASIC
map(0x1000, 0x17ff).ram().share("videoram");
map(0x1800, 0x1fff).ram();
}
void ac1_state::ac1_32_mem(address_map &map)
{
ac1_mem(map);
map(0x1800, 0xffff).ram();
}
void ac1_state::ac1_io(address_map &map)
{
map.global_mask(0xff);
map(0x00, 0x03).rw("ctc", FUNC(z80ctc_device::read), FUNC(z80ctc_device::write)); // on the board, but ignored by standard bios
map(0x04, 0x07).rw("pio", FUNC(z80pio_device::read), FUNC(z80pio_device::write));
}
void ac1_state::ac1scch_io(address_map &map)
{
map.global_mask(0xff);
ac1_io(map);
map(0x08, 0x0b).rw("pio2", FUNC(z80pio_device::read), FUNC(z80pio_device::write));
// more...
}
/* Input ports */
static INPUT_PORTS_START( ac1 )
PORT_START("LINE.0")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_0) PORT_CHAR('0')
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!')
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('"')
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#')
PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$')
PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%')
PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&')
PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('\'')
PORT_START("LINE.1")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('(')
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR(')')
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_COLON) PORT_CHAR(':') PORT_CHAR('*')
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR(';') PORT_CHAR('+')
PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<')
PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('=')
PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>')
PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?')
PORT_START("LINE.2")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('@') PORT_CHAR('`')
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_A) PORT_CHAR('A') PORT_CHAR('a')
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_B) PORT_CHAR('B') PORT_CHAR('b')
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_C) PORT_CHAR('C') PORT_CHAR('c')
PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_D) PORT_CHAR('D') PORT_CHAR('d')
PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_E) PORT_CHAR('E') PORT_CHAR('e')
PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_F) PORT_CHAR('F') PORT_CHAR('f')
PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_G) PORT_CHAR('G') PORT_CHAR('g')
PORT_START("LINE.3")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_H) PORT_CHAR('H') PORT_CHAR('h')
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_I) PORT_CHAR('I') PORT_CHAR('i')
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_J) PORT_CHAR('J') PORT_CHAR('j')
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_K) PORT_CHAR('K') PORT_CHAR('k')
PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_L) PORT_CHAR('L') PORT_CHAR('l')
PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_M) PORT_CHAR('M') PORT_CHAR('m')
PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_N) PORT_CHAR('N') PORT_CHAR('n')
PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_O) PORT_CHAR('O') PORT_CHAR('o')
PORT_START("LINE.4")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_P) PORT_CHAR('P') PORT_CHAR('p')
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_Q) PORT_CHAR('Q') PORT_CHAR('q')
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_R) PORT_CHAR('R') PORT_CHAR('r')
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_S) PORT_CHAR('S') PORT_CHAR('s')
PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_T) PORT_CHAR('T') PORT_CHAR('t')
PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_U) PORT_CHAR('U') PORT_CHAR('u')
PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_V) PORT_CHAR('V') PORT_CHAR('v')
PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_W) PORT_CHAR('W') PORT_CHAR('w')
PORT_START("LINE.5")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_X) PORT_CHAR('X') PORT_CHAR('x')
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_Y) PORT_CHAR('Y') PORT_CHAR('y')
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_Z) PORT_CHAR('Z') PORT_CHAR('z')
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('[') PORT_CHAR(']')
PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR('\\') PORT_CHAR('|')
PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR('{') PORT_CHAR('}')
PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_END) PORT_CHAR('^') PORT_CHAR('~')
PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_HOME) PORT_CHAR('_') PORT_CHAR(127)
PORT_START("LINE.6")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Shift") PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Ctrl") PORT_CODE(KEYCODE_LCONTROL) PORT_CODE(KEYCODE_RCONTROL)
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13)
PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Backspace") PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8)
INPUT_PORTS_END
const gfx_layout charlayout =
{
6, 8, /* 6x8 characters */
256, /* 256 characters */
1, /* 1 bits per pixel */
{0}, /* no bitplanes; 1 bit per pixel */
{7, 6, 5, 4, 3, 2},
{0 * 8, 1 * 8, 2 * 8, 3 * 8, 4 * 8, 5 * 8, 6 * 8, 7 * 8},
8*8 /* size of one char */
};
static GFXDECODE_START( gfx_ac1 )
GFXDECODE_ENTRY( "gfx1", 0x0000, charlayout, 0, 1 )
GFXDECODE_END
u32 ac1_state::screen_update_ac1(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
for (u8 y = 0; y < 16; y++ )
for (u8 x = 0; x < 64; x++ )
m_gfxdecode->gfx(0)->opaque(bitmap,cliprect, m_vram[x + y*64], 0, 0, 0, 63*6-x*6, 15*8-y*8);
return 0;
}
u32 ac1_state::screen_update_ac1_32(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
for (u8 y = 0; y < 32; y++ )
for (u8 x = 0; x < 64; x++ )
m_gfxdecode->gfx(0)->opaque(bitmap,cliprect, m_vram[x + y*64], 0, 0, 0, 63*6-x*6, 31*8-y*8);
return 0;
}
void ac1_state::machine_start()
{
save_item(NAME(has_lowercase));
}
void ac1_state::init_upper()
{
has_lowercase = false;
}
void ac1_state::init_lower()
{
has_lowercase = true;
}
void ac1_state::ac1(machine_config &config)
{
/* basic machine hardware */
Z80(config, m_maincpu, XTAL(8'000'000) / 4);
m_maincpu->set_addrmap(AS_PROGRAM, &ac1_state::ac1_mem);
m_maincpu->set_addrmap(AS_IO, &ac1_state::ac1_io);
z80pio_device& pio(Z80PIO(config, "pio", XTAL(8'000'000)/4));
pio.in_pa_callback().set(FUNC(ac1_state::ac1_port_a_r));
pio.out_pa_callback().set(FUNC(ac1_state::ac1_port_a_w));
pio.in_pb_callback().set(FUNC(ac1_state::ac1_port_b_r));
pio.out_pb_callback().set(FUNC(ac1_state::ac1_port_b_w));
Z80CTC(config, "ctc", 8'000'000 / 4); // all connections go external
// video hardware
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
screen.set_refresh_hz(50);
screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */
screen.set_size(64*6, 16*8);
screen.set_visarea_full();
screen.set_screen_update(FUNC(ac1_state::screen_update_ac1));
screen.set_palette(m_palette);
GFXDECODE(config, m_gfxdecode, m_palette, gfx_ac1);
PALETTE(config, m_palette, palette_device::MONOCHROME);
// sound hardware
SPEAKER(config, "mono").front_center();
SPEAKER_SOUND(config, m_speaker).add_route(ALL_OUTPUTS, "mono", 0.50);
CASSETTE(config, m_cassette);
m_cassette->set_default_state(CASSETTE_STOPPED | CASSETTE_SPEAKER_ENABLED | CASSETTE_MOTOR_ENABLED);
m_cassette->add_route(ALL_OUTPUTS, "mono", 0.05);
}
void ac1_state::ac1_32(machine_config &config)
{
ac1(config);
m_maincpu->set_addrmap(AS_PROGRAM, &ac1_state::ac1_32_mem);
screen_device &screen(*subdevice<screen_device>("screen"));
screen.set_size(64*6, 32*8);
screen.set_visarea_full();
screen.set_screen_update(FUNC(ac1_state::screen_update_ac1_32));
}
void ac1_state::ac1scch(machine_config &config)
{
ac1_32(config);
m_maincpu->set_addrmap(AS_IO, &ac1_state::ac1scch_io);
Z80PIO(config, "pio2", XTAL(8'000'000)/4); // for V24 and printer
// more...
}
/* ROM definition */
ROM_START( ac1 )
ROM_REGION( 0x1000, "maincpu", ROMREGION_ERASEFF )
ROM_SYSTEM_BIOS( 0, "v1", "Version 3.1 (orig)" )
ROMX_LOAD("mon_v31_16.bin", 0x0000, 0x0800, CRC(1ba65e4d) SHA1(3382b8d03f31166a56aea49fd1ec1e82a7108300), ROM_BIOS(0))
ROM_SYSTEM_BIOS( 1, "v2", "Version 3.1 (fixed)" )
ROMX_LOAD("mon_v31_16_v2.bin", 0x0000, 0x0800, CRC(8904beb4) SHA1(db8d00a2537ac3a662e3c91e55eb2bf824a72062), ROM_BIOS(1))
// from Funkamateur 01/85
ROM_LOAD("minibasic.bin", 0x0800, 0x0800, CRC(06782639) SHA1(3fd57b3ae3f538374b0d794d8aa15d06bcaaddd8))
ROM_REGION(0x0800, "gfx1",0)
// 64 chars - U402 BM513
ROM_LOAD("u402.bin", 0x0000, 0x0200, CRC(cfb67f28) SHA1(e3a62a3a8bce0d098887e31fd16410f38832fd18))
ROM_COPY("gfx1", 0x0000, 0x0200, 0x0200)
ROM_COPY("gfx1", 0x0000, 0x0400, 0x0200)
ROM_COPY("gfx1", 0x0000, 0x0600, 0x0200)
ROM_END
ROM_START( ac1_32 )
ROM_REGION( 0x1000, "maincpu", ROMREGION_ERASEFF )
ROM_LOAD("mon_v31_32.bin", 0x0000, 0x0800, CRC(bea78b1a) SHA1(8a3e2ac2033aa0bb016be742cfea7e4b09c0813b))
// from Funkamateur 01/85
ROM_LOAD("minibasic.bin", 0x0800, 0x0800, CRC(06782639) SHA1(3fd57b3ae3f538374b0d794d8aa15d06bcaaddd8))
ROM_REGION(0x0800, "gfx1",0)
ROM_SYSTEM_BIOS( 0, "128", "128 chars" )
// 128 chars - U555 or 2708 from Funkamateur 06/86 128 including pseudo graphics
ROMX_LOAD("zg_128.bin", 0x0000, 0x0400, CRC(0a6f7796) SHA1(64d77639b1ea23f45b4bd38c251851acb2d03822), ROM_BIOS(0))
ROMX_LOAD("zg_128.bin", 0x0400, 0x0400, CRC(0a6f7796) SHA1(64d77639b1ea23f45b4bd38c251851acb2d03822), ROM_BIOS(0))
ROM_SYSTEM_BIOS( 1, "256", "256 chars" )
// 256 chars - 2716 from Computerclub Dessau including pseudo graphics
ROMX_LOAD("zg_256.bin", 0x0000, 0x0800, CRC(b4171df5) SHA1(abdec4e00257f86b1a57e02b9c6b4d2df2a2a2db), ROM_BIOS(1))
ROM_END
ROM_START( ac1scch )
ROM_REGION( 0x1000, "maincpu", ROMREGION_ERASEFF )
ROM_SYSTEM_BIOS( 0, "v7", "Version 7" )
ROMX_LOAD("mon_v7.bin", 0x0000, 0x1000, CRC(fd17b0cf) SHA1(e47113025bd9dadc1522425e21703f43e584b00f), ROM_BIOS(0))
ROM_SYSTEM_BIOS( 1, "v8", "Version 8" )
ROMX_LOAD("mon_v8.bin", 0x0000, 0x1000, CRC(5af68da5) SHA1(e760d4400b9c937e7e789d52b8ec975ff253a122), ROM_BIOS(1))
ROM_SYSTEM_BIOS( 2, "v10", "Version 10" )
ROMX_LOAD("mon_v10.bin", 0x0000, 0x1000, CRC(f8e67ecb) SHA1(7953676fc8c22824ceff464c7177e9ac0343b8ce), ROM_BIOS(2)) // not working
ROM_SYSTEM_BIOS( 3, "v1088", "Version 10/88" )
ROMX_LOAD("mon_v1088.bin", 0x0000, 0x1000, CRC(bbb0a6df) SHA1(de9389e142541a8b5ff238b59e98bf571c794bef), ROM_BIOS(3))
ROM_REGION(0x0800, "gfx1",0)
ROM_LOAD("zg_scch.bin", 0x0000, 0x0800, CRC(fbfaf5da) SHA1(667568c5909e9a17675cf09dfbce2fc090c420ab))
ROM_END
// Driver
// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
COMP( 1984, ac1, 0, 0, ac1, ac1, ac1_state, init_upper, "Frank Heyder", "Amateurcomputer AC1 Berlin", MACHINE_SUPPORTS_SAVE )
COMP( 1984, ac1_32, ac1, 0, ac1_32, ac1, ac1_state, init_lower, "Frank Heyder", "Amateurcomputer AC1 Berlin (32 lines)", MACHINE_SUPPORTS_SAVE )
COMP( 1984, ac1scch, ac1, 0, ac1scch, ac1, ac1_state, init_lower, "Frank Heyder", "Amateurcomputer AC1 SCCH", MACHINE_NOT_WORKING | MACHINE_SUPPORTS_SAVE )
// ac1_2010
// ac1_2017