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|
// license:BSD-3-Clause
// copyright-holders:Curt Coder
/***************************************************************************
Chromatics CGC 7900
05/04/2010 Skeleton driver.
****************************************************************************/
/*
TODO:
. does not boot
. interrupts
. vsync interrupt
. map ROM to 000000-000007 at boot
- NVRAM (= battery backed SRAM) at 0xE40xxx
- floppy
- bitmap display
- Z mode read/write
- color status write
- bitmap roll
- overlay roll
. keyboard
- joystick
- light pen
- memory parity
- sync
- disk DMA
- PIO DMA
- serial port controller
- HVG
- OMTI Series 10 SCSI controller (8" Winchester HD)
docs:
bitsavers://pdf/chromatics/
http://z80cpu.eu/mirrors/oldcomputers.dyndns.org/public/pub/manuals/omti10a.pdf
how to:
C-u @ -- enter Terminal
C-u F -- use serial port from Terminal (null_modem has to be set up 9600, 7E1)
C-u M -- enter Monitor
C-u T -- enter Thaw (setup utility)
C-u d -- boot DOS
C-u Q 1 -- display clock
See User's Manual appendix A for more control sequences.
*/
#include "emu.h"
#include "includes/cgc7900.h"
#include "speaker.h"
#define VERBOSE 1
#include "logmacro.h"
/***************************************************************************
PARAMETERS
***************************************************************************/
#define INT_RTC 0x0001
#define INT_RS449_TXRDY 0x0002
#define INT_BINT2 0x0004
#define INT_RS232_TXRDY 0x0008
#define INT_DISK 0x0010
#define INT_BINT3 0x0020
#define INT_BEZEL 0x0040
#define INT_KEYBOARD 0x0080
#define INT_RS449_RXRDY 0x0100
#define INT_LIGHT_PEN 0x0200
#define INT_BINT4 0x0400
#define INT_JOYSTICK 0x0800
#define INT_VSYNC 0x1000
#define INT_BINT5 0x2000
#define INT_BINT1 0x4000
#define INT_RS232_RXRDY 0x8000
/***************************************************************************
READ/WRITE HANDLERS
***************************************************************************/
void cgc7900_state::kbd_put(u8 data)
{
kbd_ready = true;
kbd_data = data;
irq_encoder(7, ASSERT_LINE);
}
/*-------------------------------------------------
keyboard_r - keyboard data read
-------------------------------------------------*/
READ16_MEMBER( cgc7900_state::keyboard_r )
{
u16 data;
/*
bit description
0 key data bit 0
1 key data bit 1
2 key data bit 2
3 key data bit 3
4 key data bit 4
5 key data bit 5
6 key data bit 6
7 key data bit 7
8 SHIFT key
9 CTRL key
10 M1 key
11 M2 key
12
13
14
15
*/
if (kbd_ready)
{
data = kbd_data | kbd_mods;
kbd_ready = false;
irq_encoder(7, CLEAR_LINE);
}
else
{
data = kbd_mods;
}
LOG("kbd == %04x\n", data);
if (kbd_mods)
kbd_mods = 0;
return data;
}
/*-------------------------------------------------
keyboard_w - keyboard data write
-------------------------------------------------*/
WRITE16_MEMBER( cgc7900_state::keyboard_w )
{
/*
bit description
0 LED select bit 0
1 LED select bit 1
2 LED select bit 2
3 LED select bit 3
4 LED select bit 4
5
6
7 LED switch (1=on, 0=off)
8
9
10
11
12
13
14
15
*/
LOG("kbd <- %04x\n", data);
}
/*-------------------------------------------------
interrupt_mask_w - interrupt mask write
-------------------------------------------------*/
static const int int_levels[16] = { 5, 4, 5, 4, 4, 5, 4, 5, 5, 4, 5, 4, 4, 5, 4, 5 };
static const int int_vectors[16] = {
0x4b, 0x44, 0x4c, 0x43, 0x42, 0x4d, 0x45, 0x4a, 0x49, 0x46, 0x4e, 0x41, 0x40, 0x4f, 0x47, 0x48
};
WRITE16_MEMBER( cgc7900_state::interrupt_mask_w )
{
/*
bit description vec level
0 real time clock 4b 5
1 RS-449 Tx ready 44 4
2 BINT 2 4c 5
3 RS-232 Tx ready 43 4
4 disk 42 4
5 BINT 3 4d 5
6 bezel keys 45 4
7 keyboard 4a 5
8 RS-449 Rx ready 49 5
9 light pen 46 4
10 BINT 4 4e 5
11 joystick 41 4
12 vert. retrace 40 4
13 BINT 5 4f 5
14 BINT 1 47 4
15 RS-232 Rx ready 48 5
default mask is 0x7e3f -- RS232 Rx, RS449 Rx, keyboard, bezel.
*/
if (m_int_mask != data)
{
u16 changed = m_int_mask ^ data;
LOG("i_mask: changed %04X -> %04X\n", m_int_mask, data);
for (int i = 0; i < 16; i++)
{
if (BIT(changed, i) && BIT(data, i))
{
LOG("i_mask: pin %d disabled, clearing irq\n", i);
irq_encoder(i, CLEAR_LINE);
}
if (BIT(changed, i) && !BIT(data, i))
{
LOG("i_mask: pin %d enabled, %s irq\n", i, BIT(m_int_active, i) ? "setting" : "clearing");
irq_encoder(i, BIT(m_int_active, i));
}
}
}
m_int_mask = data;
}
void cgc7900_state::cpu_space_map(address_map &map)
{
map(0xfffff2, 0xffffff).lr16(NAME([] (offs_t offset) -> u16 { return int_vectors[offset + 1]; }));
}
void cgc7900_state::irq_encoder(int pin, int state)
{
if (state == ASSERT_LINE)
m_int_active |= (1 << pin);
else
m_int_active &= ~(1 << pin);
if (!BIT(m_int_mask, pin))
{
m_maincpu->set_input_line(int_levels[pin], state);
}
}
/*-------------------------------------------------
disk_data_r - disk data read
-------------------------------------------------*/
READ16_MEMBER( cgc7900_state::disk_data_r )
{
return 0;
}
/*-------------------------------------------------
disk_data_w - disk data write
-------------------------------------------------*/
WRITE16_MEMBER( cgc7900_state::disk_data_w )
{
}
/*-------------------------------------------------
disk_status_r - disk status read
-------------------------------------------------*/
READ16_MEMBER( cgc7900_state::disk_status_r )
{
/*
bit signal description
0 _I/O input/output
1 _REQ request
2 _BSY busy
3 C/_D control/data
4 _MSG message
5 _RDY ready
6
7
8
9
10
11
12
13
14
15
*/
return 0xffff - 0x04;
}
/*-------------------------------------------------
disk_command_w - disk command write
-------------------------------------------------*/
WRITE16_MEMBER( cgc7900_state::disk_command_w )
{
}
READ16_MEMBER(cgc7900_state::unmapped_r)
{
return rand();
}
/***************************************************************************
MEMORY MAPS
***************************************************************************/
/*-------------------------------------------------
ADDRESS_MAP( cgc7900_mem )
-------------------------------------------------*/
void cgc7900_state::cgc7900_mem(address_map &map)
{
map.unmap_value_high();
map(0x000000, 0x1fffff).ram().share("chrom_ram");
map(0x800000, 0x80ffff).rom().region(M68000_TAG, 0);
map(0x810000, 0x9fffff).r(FUNC(cgc7900_state::unmapped_r));
map(0xa00000, 0xbfffff).rw(FUNC(cgc7900_state::z_mode_r), FUNC(cgc7900_state::z_mode_w));
map(0xc00000, 0xdfffff).ram().share("plane_ram");
map(0xe00000, 0xe1ffff).w(FUNC(cgc7900_state::color_status_w));
// map(0xe20000, 0xe23fff) Raster Processor
map(0xe30000, 0xe303ff).ram().share("clut_ram");
map(0xe38000, 0xe3bfff).ram().share("overlay_ram");
map(0xe40000, 0xe40001).ram().share("roll_bitmap");
map(0xe40002, 0xe40003).ram().share("pan_x");
map(0xe40004, 0xe40005).ram().share("pan_y");
map(0xe40006, 0xe40007).ram().share("zoom");
map(0xe40008, 0xe40009).ram();
map(0xe4000a, 0xe4000f).ram(); // Raster Processor
map(0xe40010, 0xe40011).ram().share("blink_select");
map(0xe40012, 0xe40013).ram().share("plane_select");
map(0xe40014, 0xe40015).ram().share("plane_switch");
map(0xe40016, 0xe40017).ram().share("color_status_fg");
map(0xe40018, 0xe40019).ram().share("color_status_bg");
map(0xe4001a, 0xe4001b).ram().share("roll_overlay");
map(0xe4001c, 0xe40fff).ram();
// map(0xefc440, 0xefc441) HVG Load X
// map(0xefc442, 0xefc443) HVG Load Y
// map(0xefc444, 0xefc445) HVG Load dX
// map(0xefc446, 0xefc447) HVG Load dY
// map(0xefc448, 0xefc449) HVG Load Pixel Color
// map(0xefc44a, 0xefc44b) HVG Load Trip
map(0xff8000, 0xff8003).rw(m_i8251_0, FUNC(i8251_device::read), FUNC(i8251_device::write)).umask16(0x00ff);
map(0xff8040, 0xff8043).rw(m_i8251_1, FUNC(i8251_device::read), FUNC(i8251_device::write)).umask16(0x00ff);
map(0xff8080, 0xff8081).rw(FUNC(cgc7900_state::keyboard_r), FUNC(cgc7900_state::keyboard_w));
// map(0xff80c6, 0xff80c7) Joystick X axis
// map(0xff80ca, 0xff80cb) Joystick Y axis
// map(0xff80cc, 0xff80cd) Joystick Z axis
map(0xff8100, 0xff8101).rw(FUNC(cgc7900_state::disk_data_r), FUNC(cgc7900_state::disk_data_w));
map(0xff8120, 0xff8121).rw(FUNC(cgc7900_state::disk_status_r), FUNC(cgc7900_state::disk_command_w));
map(0xff8140, 0xff8141).portr("BEZEL");
map(0xff8180, 0xff8180).w(K1135A_TAG, FUNC(com8116_device::stt_str_w));
map(0xff81c0, 0xff81ff).rw(MM58167_TAG, FUNC(mm58167_device::read), FUNC(mm58167_device::write)).umask16(0x00ff);
map(0xff8200, 0xff8201).w(FUNC(cgc7900_state::interrupt_mask_w));
// map(0xff8240, 0xff8241) Light Pen enable
// map(0xff8242, 0xff8243) Light Pen X value
// map(0xff8244, 0xff8245) Light Pen Y value
// map(0xff8246, 0xff8247) Buffer memory parity check
// map(0xff8248, 0xff8249) Buffer memory parity set/reset
map(0xff824a, 0xff824b).r(FUNC(cgc7900_state::sync_r));
map(0xff83c0, 0xff83c0).w(AY8910_TAG, FUNC(ay8910_device::address_w));
map(0xff83c2, 0xff83c2).r(AY8910_TAG, FUNC(ay8910_device::data_r));
map(0xff83c4, 0xff83c4).w(AY8910_TAG, FUNC(ay8910_device::data_w));
// DDMA option board
// map(0xff8500, 0xff8501) Disk DMA Command Register
// map(0xff8502, 0xff8503) Disk DMA Address Register
// map(0xff8507, 0xff8507) Disk DMA Control/Status Register
}
/*-------------------------------------------------
ADDRESS_MAP( keyboard_mem )
-------------------------------------------------*/
void cgc7900_state::keyboard_mem(address_map &map)
{
map(0x000, 0x7ff).rom();
}
/***************************************************************************
INPUT PORTS
***************************************************************************/
/*-------------------------------------------------
INPUT_PORTS( cgc7900 )
-------------------------------------------------*/
static INPUT_PORTS_START( cgc7900 )
PORT_START("BEZEL")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Bezel 7")
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Bezel 8")
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Bezel 5")
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Bezel 6")
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Bezel 3")
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Bezel 4")
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Bezel 1")
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("Bezel 2")
PORT_START("JOYSTICK_X")
PORT_BIT( 0x3ff, 0x200, IPT_AD_STICK_X ) PORT_MINMAX(0x000, 0x3ff) PORT_SENSITIVITY(100) PORT_KEYDELTA(50)
PORT_START("JOYSTICK_Y")
PORT_BIT( 0x3ff, 0x200, IPT_AD_STICK_Y ) PORT_MINMAX(0x000, 0x3ff) PORT_SENSITIVITY(100) PORT_KEYDELTA(50)
PORT_START("JOYSTICK_Z")
PORT_BIT( 0x3ff, 0x200, IPT_AD_STICK_Z ) PORT_MINMAX(0x000, 0x3ff) PORT_SENSITIVITY(100) PORT_KEYDELTA(50)
PORT_START("LIGHT_PEN_X")
PORT_BIT( 0x1ff, 0x100, IPT_LIGHTGUN_X ) PORT_CROSSHAIR(X, 1.0, 0.0, 0) PORT_MINMAX(0, 511) PORT_SENSITIVITY(20) PORT_KEYDELTA(25)
PORT_START("LIGHT_PEN_Y")
PORT_BIT( 0x1ff, 0x0c0, IPT_LIGHTGUN_Y ) PORT_CROSSHAIR(Y, 1.0, 0.0, 0) PORT_MINMAX(0, 383) PORT_SENSITIVITY(20) PORT_KEYDELTA(25)
INPUT_PORTS_END
/***************************************************************************
MACHINE INITIALIZATION
***************************************************************************/
/*-------------------------------------------------
MACHINE_START( cgc7900 )
-------------------------------------------------*/
void cgc7900_state::machine_start()
{
/* register for state saving */
save_pointer(NAME(m_overlay_ram.target()), 0x4000);
}
void cgc7900_state::machine_reset()
{
uint8_t *user1 = memregion(M68000_TAG)->base();
memcpy((uint8_t *)m_chrom_ram.target(), user1, 8); // not really what happens but...
kbd_mods = 0x300; // forces cold boot -- initializes SRAM contents
kbd_data = 0;
kbd_ready = false;
m_i8251_0->write_cts(0);
m_int_active = 0;
}
/***************************************************************************
MACHINE DRIVERS
***************************************************************************/
/*-------------------------------------------------
MACHINE_DRIVER( cgc7900 )
-------------------------------------------------*/
void cgc7900_state::cgc7900(machine_config &config)
{
/* basic machine hardware */
M68000(config, m_maincpu, XTAL(28'480'000)/4);
m_maincpu->set_addrmap(AS_PROGRAM, &cgc7900_state::cgc7900_mem);
m_maincpu->set_addrmap(m68000_base_device::AS_CPU_SPACE, &cgc7900_state::cpu_space_map);
i8035_device &kbmcu(I8035(config, I8035_TAG, 1000000));
kbmcu.set_addrmap(AS_PROGRAM, &cgc7900_state::keyboard_mem);
kbmcu.set_disable();
// am2910_device &am2910(AM2910(config, AM2910_TAG, XTAL(17'360'000)));
// am2910.set_addrmap(AS_PROGRAM, &cgc7900_state::omti10_mem);
/* video hardware */
cgc7900_video(config);
/* sound hardware */
SPEAKER(config, "mono").front_center();
AY8910(config, AY8910_TAG, XTAL(28'480'000)/16).add_route(ALL_OUTPUTS, "mono", 0.25);
/* devices */
generic_keyboard_device &keyboard(GENERIC_KEYBOARD(config, "keyboard", 0));
keyboard.set_keyboard_callback(FUNC(cgc7900_state::kbd_put));
mm58167_device &rtc(MM58167(config, MM58167_TAG, XTAL(32'768)));
rtc.irq().set(FUNC(cgc7900_state::irq<0x0>));
com8116_device &k1135a(COM8116(config, K1135A_TAG, XTAL(5'068'800)));
k1135a.fr_handler().set(m_i8251_0, FUNC(i8251_device::write_txc));
k1135a.fr_handler().append(m_i8251_0, FUNC(i8251_device::write_rxc));
k1135a.ft_handler().set(m_i8251_1, FUNC(i8251_device::write_txc));
k1135a.ft_handler().append(m_i8251_1, FUNC(i8251_device::write_rxc));
I8251(config, m_i8251_0, 0);
m_i8251_0->txd_handler().set("rs232", FUNC(rs232_port_device::write_txd));
m_i8251_0->dtr_handler().set("rs232", FUNC(rs232_port_device::write_dtr));
m_i8251_0->rts_handler().set("rs232", FUNC(rs232_port_device::write_rts));
m_i8251_0->rxrdy_handler().set(FUNC(cgc7900_state::irq<0xf>));
m_i8251_0->txrdy_handler().set(FUNC(cgc7900_state::irq<0x3>));
rs232_port_device &rs232(RS232_PORT(config, "rs232", default_rs232_devices, "null_modem"));
rs232.rxd_handler().set(m_i8251_0, FUNC(i8251_device::write_rxd));
rs232.dsr_handler().set(m_i8251_0, FUNC(i8251_device::write_dsr));
I8251(config, m_i8251_1, 0);
m_i8251_1->txd_handler().set("rs449", FUNC(rs232_port_device::write_txd));
m_i8251_1->dtr_handler().set("rs449", FUNC(rs232_port_device::write_dtr));
m_i8251_1->rts_handler().set("rs449", FUNC(rs232_port_device::write_rts));
m_i8251_1->rxrdy_handler().set(FUNC(cgc7900_state::irq<0x8>));
m_i8251_1->txrdy_handler().set(FUNC(cgc7900_state::irq<0x1>));
rs232_port_device &rs449(RS232_PORT(config, "rs449", default_rs232_devices, nullptr));
rs449.rxd_handler().set(m_i8251_1, FUNC(i8251_device::write_rxd));
rs449.dsr_handler().set(m_i8251_1, FUNC(i8251_device::write_dsr));
}
/***************************************************************************
ROMS
***************************************************************************/
ROM_START( cgc7900 )
ROM_REGION16_BE( 0x10000, M68000_TAG, 0 )
ROM_LOAD16_BYTE( "210274 800k even a3ee term 1.4.ue24", 0x0000, 0x1000, CRC(5fa8f368) SHA1(120dbcfedce0badd38bf5b23e1fbc99667eb286c) )
ROM_LOAD16_BYTE( "210275 800k odd bbb3 term 1.4.uf24", 0x0001, 0x1000, CRC(4d479457) SHA1(5fa96a1eadfd9ba493d28691286e2e001a489a19) )
ROM_LOAD16_BYTE( "210276 802k even 0c22 term 1.4.ue22", 0x2000, 0x1000, CRC(c88c44ec) SHA1(f39d8a3cf7aaefd815b4426348965b076c1f2265) )
ROM_LOAD16_BYTE( "210277 802k odd b58c term 1.4.uf22", 0x2001, 0x1000, CRC(52ffe01f) SHA1(683aa71c2eb17b7ad639b888487db73d7684901a) )
ROM_LOAD16_BYTE( "210278 804k even eaf4 term 1.4.ue21", 0x4000, 0x1000, CRC(7fe326db) SHA1(d39d05e008160fb8afa62e0d4cfb1d813f2296d4) )
ROM_LOAD16_BYTE( "210279 804k odd 3f6d term 1.4.uf21", 0x4001, 0x1000, CRC(6c12d81c) SHA1(efe7c20e567c02b9c5b66a2d18e035d5f5f56b28) )
ROM_LOAD16_BYTE( "210280 806k even 679d term 1.4.ue20", 0x6000, 0x1000, CRC(70930d74) SHA1(a5ab1c0bd8bd829408961107e01598cd71a97fec) )
ROM_LOAD16_BYTE( "210281 1.4 806k odd sum 611e.uf20", 0x6001, 0x1000, CRC(8080aa2a) SHA1(c018a23e6f2158e2d63723cade0a3ad737090921) )
ROM_LOAD16_BYTE( "su7700 210282 808k even opmod term 1.4 sum 2550.ue18", 0x8000, 0x1000, CRC(8f5834cd) SHA1(3cd03c82aa85c30cbc8e954f5a9fc4e9034f913b) )
ROM_LOAD16_BYTE( "su7700 210283 808k odd opmod term 1.4 sum faca.uf18", 0x8001, 0x1000, CRC(e593b133) SHA1(6c641df844706e0d990b5fd544e98594171080a1) )
ROM_LOAD16_BYTE( "210258 80ak even b2f6 mon 1.3.ue15", 0xa000, 0x1000, CRC(ec5a1250) SHA1(ffef73d35f172ac610b35bdf729d51eb6f9346ba) )
ROM_LOAD16_BYTE( "210259 80ak odd cd66 mon 1.3.uf15", 0xa001, 0x1000, CRC(61eb43c6) SHA1(baaae0b787798147da453aac1f815589ea4ed921) )
ROM_LOAD16_BYTE( "210244 80c even ce40 dos 1.6b.ue13", 0xc000, 0x1000, CRC(3b64e4cb) SHA1(71b28d160b101ea6165e602ff1c54272b7b30ece) )
ROM_LOAD16_BYTE( "210245 80c odd 1ac3 dos 1.6b.uf13", 0xc001, 0x1000, CRC(0b6539ca) SHA1(d49e6d3307e5d634a412fd80b59492f31e29f7e0) )
ROM_LOAD16_BYTE( "210290 idris even rel3 sum 0cce.ue12", 0xe000, 0x1000, CRC(07065772) SHA1(620ea5d55021e5c38efc010722ddbd852cd49e39) )
ROM_LOAD16_BYTE( "210291 idris odd rel3 sum 5d11.uf12", 0xe001, 0x1000, CRC(d81b30da) SHA1(228f9b4e39d430ce4aaa81ea63f4516a51e6d001) )
ROM_REGION( 0x800, "i8035", 0 )
ROM_LOAD( "keyboard controller i8035", 0x0000, 0x0800, NO_DUMP )
ROM_REGION( 0x800, "gfx1", 0 )
ROM_LOAD( "norm chrset 4b40.ua13", 0x0000, 0x0400, CRC(55eb7b87) SHA1(768cea80597e7396d9e26f8cd09e6b480a526fce) )
ROM_LOAD( "alt 46a7.ua14", 0x0400, 0x0400, CRC(be22b7e4) SHA1(83ef252c7fab33b4d3821a3049b89d044df35de8) )
ROM_REGION( 0x20, "proms", 0 )
ROM_LOAD( "rp0a.ub8", 0x0000, 0x0020, NO_DUMP )
ROM_LOAD( "rp1a.ub7", 0x0000, 0x0020, NO_DUMP )
ROM_LOAD( "rp2a.ub9", 0x0000, 0x0020, NO_DUMP )
ROM_LOAD( "ha-5.ub1", 0x0000, 0x0020, NO_DUMP )
ROM_LOAD( "03c0.ua16", 0x0000, 0x0020, NO_DUMP )
ROM_LOAD( "03c0.ua11", 0x0000, 0x0020, NO_DUMP )
/* OMTI Series 10 SCSI controller */
ROM_REGION( 0x1400, AM2910_TAG, 0 )
ROM_LOAD( "35 1.7b", 0x0000, 0x0400, NO_DUMP ) /* 82S137N */
ROM_LOAD( "35 2.7b", 0x0400, 0x0400, NO_DUMP ) /* 82S137N */
ROM_LOAD( "35 3.7b", 0x0800, 0x0400, NO_DUMP ) /* 82S137N */
ROM_LOAD( "35 4.7b", 0x0c00, 0x0400, NO_DUMP ) /* 82S137N */
ROM_LOAD( "35 5.7b", 0x1000, 0x0400, NO_DUMP ) /* 82S137N */
ROM_END
/***************************************************************************
SYSTEM DRIVERS
***************************************************************************/
/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */
COMP( 1980, cgc7900, 0, 0, cgc7900, cgc7900, cgc7900_state, empty_init, "Chromatics", "CGC 7900", MACHINE_NOT_WORKING)
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