// license:BSD-3-Clause
// copyright-holders:Miodrag Milanovic, Robbbert
/******************************************************************************
LLC1 driver by Miodrag Milanovic
2009-04-17 Preliminary driver.
2012-07-?? Updates by Robbbert
Handy addresses: (Press X then the 4 digits then Enter)
0800 = BASIC cold start
0803 = BASIC warm start
13BE = display Monitor logo
This machine has an 8-digit LED display with hex keyboard,
and also a 64x16 monochrome screen with full keyboard.
The monitor uses the hex keyboard, while Basic uses the full keyboard.
Monitor output is on the digits, but the single-step command displays
a running register dump on the main screen.
There are no storage facilities, and no sound.
BASIC is integer only (-32768 to 32767), about 6k of space, and all
input is to be in uppercase. It does have minimal string capability,
but there is no $ sign, so how to create a string variable is unknown.
To exit back to the monitor, type BYE.
The user instructions of the monitor (in German) are here:
http://www.jens-mueller.org/jkcemu/llc1.html
ToDo:
- Get good dump of monitor rom, has one known bad byte, possibly more.
- In Basic, when it first scrolls, the start of the line shifts a character
to the right. Unknown if a bug or a bad byte. (patched)
*******************************************************************************/
#include "emu.h"
#include "cpu/z80/z80.h"
#include "machine/z80daisy.h"
#include "machine/z80ctc.h"
#include "machine/z80pio.h"
#include "machine/keyboard.h"
#include "emupal.h"
#include "screen.h"
#include "llc1.lh"
class llc1_state : public driver_device
{
public:
llc1_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_ctc(*this, "ctc")
, m_p_chargen(*this, "chargen")
, m_vram(*this, "videoram")
, m_digits(*this, "digit%u", 0U)
{ }
void llc1(machine_config &config);
DECLARE_INPUT_CHANGED_MEMBER(z3_button);
private:
void machine_start() override;
void machine_reset() override;
void kbd_put(u8 data);
u8 port1a_r();
u8 port2a_r();
u8 port2b_r();
void port1a_w(u8 data);
void port1b_w(u8 data);
u32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
void io_map(address_map &map);
void mem_map(address_map &map);
u8 m_porta;
u8 m_term_data;
required_device<z80_device> m_maincpu;
required_device<z80ctc_device> m_ctc;
required_region_ptr<u8> m_p_chargen;
required_shared_ptr<u8> m_vram;
output_finder<8> m_digits;
};
/* Address maps */
void llc1_state::mem_map(address_map &map)
{
map(0x0000, 0x07ff).rom(); // Monitor ROM
map(0x0800, 0x13ff).rom(); // BASIC ROM
map(0x1400, 0x1bff).ram(); // RAM
map(0x1c00, 0x1fff).ram().share("videoram"); // Video RAM
}
void llc1_state::io_map(address_map &map)
{
map.global_mask(0xff);
map.unmap_value_high();
map(0xEC, 0xEF).rw("pio2", FUNC(z80pio_device::read), FUNC(z80pio_device::write));
map(0xF4, 0xF7).rw("pio1", FUNC(z80pio_device::read), FUNC(z80pio_device::write));
map(0xF8, 0xFB).rw(m_ctc, FUNC(z80ctc_device::read), FUNC(z80ctc_device::write));
}
/* Input ports */
static INPUT_PORTS_START( llc1 )
PORT_START("X4") // out F4,BF
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("0") PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHANGED_MEMBER(DEVICE_SELF, llc1_state, z3_button, 0)
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("1") PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHANGED_MEMBER(DEVICE_SELF, llc1_state, z3_button, 0)
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("2") PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHANGED_MEMBER(DEVICE_SELF, llc1_state, z3_button, 0)
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("3") PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHANGED_MEMBER(DEVICE_SELF, llc1_state, z3_button, 0)
PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("C") PORT_CODE(KEYCODE_C) PORT_CHAR('C') PORT_CHANGED_MEMBER(DEVICE_SELF, llc1_state, z3_button, 0)
PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("D") PORT_CODE(KEYCODE_D) PORT_CHAR('D') PORT_CHANGED_MEMBER(DEVICE_SELF, llc1_state, z3_button, 0)
PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("E") PORT_CODE(KEYCODE_E) PORT_CHAR('E') PORT_CHANGED_MEMBER(DEVICE_SELF, llc1_state, z3_button, 0)
PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F") PORT_CODE(KEYCODE_F) PORT_CHAR('F') PORT_CHANGED_MEMBER(DEVICE_SELF, llc1_state, z3_button, 0)
PORT_START("X5") // out F4,DF
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("4") PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHANGED_MEMBER(DEVICE_SELF, llc1_state, z3_button, 0)
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("5") PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHANGED_MEMBER(DEVICE_SELF, llc1_state, z3_button, 0)
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("6") PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHANGED_MEMBER(DEVICE_SELF, llc1_state, z3_button, 0)
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("7") PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHANGED_MEMBER(DEVICE_SELF, llc1_state, z3_button, 0)
PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("REG") PORT_CODE(KEYCODE_R) PORT_CHAR('R') PORT_CHANGED_MEMBER(DEVICE_SELF, llc1_state, z3_button, 0)
PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("M (Mem)") PORT_CODE(KEYCODE_M) PORT_CHAR('M') PORT_CHANGED_MEMBER(DEVICE_SELF, llc1_state, z3_button, 0)
PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("ST (Start)") PORT_CODE(KEYCODE_ENTER) PORT_CHAR('^') PORT_CHANGED_MEMBER(DEVICE_SELF, llc1_state, z3_button, 0)
PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("DF (Reset)") PORT_CODE(KEYCODE_ESC) PORT_CHAR(27) PORT_CHANGED_MEMBER(DEVICE_SELF, llc1_state, z3_button, 0)
PORT_START("X6") // out F4,EF
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("8") PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHANGED_MEMBER(DEVICE_SELF, llc1_state, z3_button, 0)
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("9") PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHANGED_MEMBER(DEVICE_SELF, llc1_state, z3_button, 0)
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("A") PORT_CODE(KEYCODE_A) PORT_CHAR('A') PORT_CHANGED_MEMBER(DEVICE_SELF, llc1_state, z3_button, 0)
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("B") PORT_CODE(KEYCODE_B) PORT_CHAR('B') PORT_CHANGED_MEMBER(DEVICE_SELF, llc1_state, z3_button, 0)
PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("ES (Step)") PORT_CODE(KEYCODE_S) PORT_CHAR('S') PORT_CHANGED_MEMBER(DEVICE_SELF, llc1_state, z3_button, 0)
PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("DL (Go)") PORT_CODE(KEYCODE_X) PORT_CHAR('X') PORT_CHANGED_MEMBER(DEVICE_SELF, llc1_state, z3_button, 0)
PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("HP (BP)") PORT_CODE(KEYCODE_P) PORT_CHAR('P') PORT_CHANGED_MEMBER(DEVICE_SELF, llc1_state, z3_button, 0)
PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNUSED) // does nothing
INPUT_PORTS_END
INPUT_CHANGED_MEMBER(llc1_state::z3_button)
{
m_ctc->trg3(newval);
}
void llc1_state::kbd_put(u8 data)
{
static constexpr u8 s1[16]={0x40, 0x1e, 0x12, 0x1b, 0x19, 0x14, 0x15, 0x1d, 0x16, 0x17, 0x1c, 0x3c, 0x3f, 0x3d, 0x3e, 0x10}; // 0x20 to 0x2F
static constexpr u8 s2[7] ={0x1a, 0x11, 0x7c, 0x13, 0x7b, 0x1f, 0x00}; // 0x3A to 0x40
static constexpr u8 s3[6] ={0x5c, 0x00, 0x5b, 0x7e, 0x00, 0x5e}; // 0x5B to 0x60
m_term_data = data;
if ((data >= 0x20) && (data <= 0x2f))
m_term_data = s1[data-0x20];
else if ((data >= 0x3a) && (data <= 0x40))
m_term_data = s2[data-0x3a];
else if ((data >= 0x5b) && (data <= 0x60))
m_term_data = s3[data-0x5b];
else if (data >= 0x7b)
m_term_data = 0;
if (m_term_data)
m_term_data |= 0x80;
}
// LLC1 BASIC keyboard
u8 llc1_state::port2b_r()
{
if (BIT(m_term_data, 7))
{
m_term_data &= 0x7f;
return 0xff;
}
else
return m_term_data;
}
u8 llc1_state::port2a_r()
{
return 0;
}
// LLC1 Monitor keyboard
u8 llc1_state::port1a_r()
{
u8 data = 0;
if (!BIT(m_porta, 4))
data = ioport("X4")->read();
if (!BIT(m_porta, 5))
data = ioport("X5")->read();
if (!BIT(m_porta, 6))
data = ioport("X6")->read();
if (data & 0xf0)
data = (data >> 4) | 0x80;
return data;
}
void llc1_state::port1a_w(u8 data)
{
m_porta = data;
}
void llc1_state::port1b_w(u8 data)
{
static u8 count = 0, digit = 0;
if (data == 0)
{
digit = 0;
count = 0;
}
else
count++;
if (count == 1)
{
if (digit < 8)
m_digits[digit] = data & 0x7f;
}
else
if (count == 3)
{
count = 0;
digit++;
}
}
void llc1_state::machine_reset()
{
m_term_data = 0;
}
void llc1_state::machine_start()
{
m_digits.resolve();
save_item(NAME(m_porta));
save_item(NAME(m_term_data));
}
u32 llc1_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
u8 y,ra,chr,gfx,inv;
u16 sy=0,ma=0,x;
for (y = 0; y < 16; y++)
{
for (ra = 0; ra < 8; ra++)
{
u16 *p = &bitmap.pix16(sy++);
for (x = ma; x < ma + 64; x++)
{
inv = (m_vram[x] & 0x80) ? 0xff : 0;
chr = m_vram[x] & 0x7f;
/* get pattern of pixels for that character scanline */
gfx = m_p_chargen[ chr | (ra << 7) ] ^ inv;
/* Display a scanline of a character (8 pixels) */
*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+=64;
}
return 0;
}
static const z80_daisy_config daisy_chain[] =
{
{ "pio2" },
{ "ctc" },
{ nullptr }
};
/* F4 Character Displayer */
static const gfx_layout charlayout =
{
8, 8, /* 8 x 8 characters */
128, /* 128 characters */
1, /* 1 bits per pixel */
{ 0 }, /* no bitplanes */
/* x offsets */
{ 0, 1, 2, 3, 4, 5, 6, 7 },
/* y offsets */
{ 0, 1*128*8, 2*128*8, 3*128*8, 4*128*8, 5*128*8, 6*128*8, 7*128*8 },
8 /* every char takes 8 x 1 bytes */
};
static GFXDECODE_START( gfx_llc1 )
GFXDECODE_ENTRY( "chargen", 0x0000, charlayout, 0, 1 )
GFXDECODE_END
/* Machine driver */
void llc1_state::llc1(machine_config &config)
{
/* basic machine hardware */
Z80(config, m_maincpu, XTAL(2'000'000));
m_maincpu->set_daisy_config(daisy_chain);
m_maincpu->set_addrmap(AS_PROGRAM, &llc1_state::mem_map);
m_maincpu->set_addrmap(AS_IO, &llc1_state::io_map);
/* 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*8, 16*8);
screen.set_visarea(0, 64*8-1, 0, 16*8-1);
screen.set_screen_update(FUNC(llc1_state::screen_update));
screen.set_palette("palette");
GFXDECODE(config, "gfxdecode", "palette", gfx_llc1);
PALETTE(config, "palette", palette_device::MONOCHROME);
config.set_default_layout(layout_llc1);
z80pio_device& pio1(Z80PIO(config, "pio1", XTAL(2'000'000)));
pio1.in_pa_callback().set(FUNC(llc1_state::port1a_r));
pio1.out_pa_callback().set(FUNC(llc1_state::port1a_w));
pio1.out_pb_callback().set(FUNC(llc1_state::port1b_w));
z80pio_device& pio2(Z80PIO(config, "pio2", XTAL(2'000'000)));
pio2.out_int_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0);
pio2.in_pa_callback().set(FUNC(llc1_state::port2a_r));
pio2.in_pb_callback().set(FUNC(llc1_state::port2b_r));
Z80CTC(config, m_ctc, XTAL(2'000'000));
// timer 0 irq does digit display
// timer 3 is kicked off by a key press, and scans the monitor keyboard.
m_ctc->intr_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0);
m_ctc->zc_callback<0>().set(m_ctc, FUNC(z80ctc_device::trg1));
m_ctc->zc_callback<1>().set(m_ctc, FUNC(z80ctc_device::trg2));
generic_keyboard_device &keyboard(GENERIC_KEYBOARD(config, "keyboard", 0));
keyboard.set_keyboard_callback(FUNC(llc1_state::kbd_put));
}
/* ROM definition */
ROM_START( llc1 )
ROM_REGION( 0x1400, "maincpu", 0 )
//ROM_LOAD( "llc1-monitor.rom", 0x0000, 0x0800, BAD_DUMP CRC(0e81378d) SHA1(0fbb6eca016d0f439ea1c9aa0cb0affb5f49ea69) )
ROM_LOAD( "llc1mon.bin", 0x0000, 0x0800, BAD_DUMP CRC(e291dd63) SHA1(31a71bef84f7c164a270d0895cb645e078e9c6f2) )
ROM_LOAD( "llc1_tb1.bin", 0x0800, 0x0400, CRC(0d9d4039) SHA1(b515e385af57f4faf3a9f7b4a1edd59a1c1ea260) )
ROM_LOAD( "llc1_tb2.bin", 0x0c00, 0x0400, CRC(28bfea2a) SHA1(a68a8b87bfc931627ddd8d124b153e511477fbaf) )
ROM_LOAD( "llc1_tb3.bin", 0x1000, 0x0400, CRC(fe5e3132) SHA1(cc3b191e41f5772a4b86b8eb0ebe6fce67872df6) )
ROM_FILL(0x02dc, 1, 0x0f) // fix display of AF in the reg command (confirmed from monitor listing)
ROM_FILL(0x1361, 1, 0x40) // fix scrolling in Basic
ROM_REGION( 0x0400, "chargen", 0 )
ROM_LOAD ("llc1_zg.bin", 0x0000, 0x0400, CRC(fa2cd659) SHA1(1fa5f9992f35929f656c4ce55ed6980c5da1772b) )
ROM_END
/* Driver */
/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */
COMP( 1984, llc1, 0, 0, llc1, llc1, llc1_state, empty_init, "SCCH", "LLC-1", MACHINE_NO_SOUND_HW | MACHINE_SUPPORTS_SAVE )