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m20_kbd.cpp
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m20_kbd.cpp
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// license:BSD-3-Clause
// copyright-holders:Carl,Vas Crabb
#include "emu.h"
#include "m20_kbd.h"
#include "machine/keyboard.ipp"
namespace {
/*
TODO: dump 8048 mcu
There seem to be a lot of guesses in this code - actual scan rate,
FIFO length, command processing, etc. don't seem to be evidence-
based. The modifier handling seems very odd as it has aliasing and
overflow all over the place.
Layout is selected with a set of four jumpers on the keyboard MCU.
We need to bring these out to DIP switches, work out which command
is the layout request, and respond appropriately.
Available layouts:
Italian
German
French
British
USA ASCII
Spanish
Portuguese
Swedish - Finnish
Danish
Katakana
Yugoslavian
Norwegian
Greek
Swiss - French
Swiss - German
The keyboard MCU drives a buzzer. We should work out what the bell
on/off commands are and emulate it.
There are apparently no break codes.
The scancodes are arranged to read in alphabetical order with the QWERTY layout.
Modifiers apparently modify the make codes.
We are using a matrix here that corresponds to the logical scan codes - the physical matrix apparently doesn't match this.
00 1c 1d 1e 1f 20 21 22 23 24 25 26 27 c3 cd ce cf d0
?? 12 18 06 13 15 1a 16 0a 10 11 28 29 c2 ca cb cc d1
?? 02 14 05 07 08 09 0b 0c 0d 2a 2b 2c c1 c7 c8 c9 d2
?? 01 1b 19 04 17 03 0f 0e 2d 2e 2f ?? c4 c5 c6 d3
c0
Ths is the 72-key version of the keyboard.
The katakana kayout has 75 keys, but we don't have a diagram for it.
?? are modifiers, which are read directly, not through the 8x9 scan matrix.
*/
// Italian layout (QZERTY typewriter)
static INPUT_PORTS_START( m20_keyboard )
PORT_START("LINE0")
PORT_BIT(0x01,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("RESET") PORT_CODE(KEYCODE_ESC)
PORT_BIT(0x02,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_LALT) PORT_CHAR('<') PORT_CHAR('>')
PORT_BIT(0x04,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A')
PORT_BIT(0x08,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B')
PORT_BIT(0x10,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C')
PORT_BIT(0x20,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D')
PORT_BIT(0x40,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E')
PORT_BIT(0x80,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F')
PORT_START("LINE1")
PORT_BIT(0x01,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G')
PORT_BIT(0x02,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H')
PORT_BIT(0x04,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I')
PORT_BIT(0x08,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J')
PORT_BIT(0x10,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K')
PORT_BIT(0x20,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L')
PORT_BIT(0x40,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_M) PORT_CHAR(',') PORT_CHAR('?')
PORT_BIT(0x80,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N')
PORT_START("LINE2")
PORT_BIT(0x01,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O')
PORT_BIT(0x02,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P')
PORT_BIT(0x04,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q')
PORT_BIT(0x08,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R')
PORT_BIT(0x10,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S')
PORT_BIT(0x20,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T')
PORT_BIT(0x40,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U')
PORT_BIT(0x80,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V')
PORT_START("LINE3")
PORT_BIT(0x01,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_W) PORT_CHAR('z') PORT_CHAR('Z')
PORT_BIT(0x02,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X')
PORT_BIT(0x04,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y')
PORT_BIT(0x08,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_Z) PORT_CHAR('w') PORT_CHAR('W')
PORT_BIT(0x10,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_0) PORT_CHAR(0x00e0U) PORT_CHAR('0') // a grave
PORT_BIT(0x20,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_1) PORT_CHAR(0x00a3U) PORT_CHAR('1') // pound
PORT_BIT(0x40,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_2) PORT_CHAR(0x00e9U) PORT_CHAR('2') // e acute
PORT_BIT(0x80,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_3) PORT_CHAR('"') PORT_CHAR('3')
PORT_START("LINE4")
PORT_BIT(0x01,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_4) PORT_CHAR('\'') PORT_CHAR('4')
PORT_BIT(0x02,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_5) PORT_CHAR('(') PORT_CHAR('5')
PORT_BIT(0x04,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_6) PORT_CHAR('_') PORT_CHAR('6')
PORT_BIT(0x08,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_7) PORT_CHAR(0x00e8U) PORT_CHAR('7') // e grave
PORT_BIT(0x10,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_8) PORT_CHAR('^') PORT_CHAR('8')
PORT_BIT(0x20,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_9) PORT_CHAR(0x00e7U) PORT_CHAR('9') // c cedilla
PORT_BIT(0x40,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_MINUS) PORT_CHAR(')') PORT_CHAR(0x00b0U) // degree
PORT_BIT(0x80,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('-') PORT_CHAR('+')
PORT_START("LINE5")
PORT_BIT(0x01,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR(0x00ecU) PORT_CHAR('=') // i grave
PORT_BIT(0x02,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR('$') PORT_CHAR('&')
PORT_BIT(0x04,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_COLON) PORT_CHAR('m') PORT_CHAR('M')
PORT_BIT(0x08,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR(0x00f9U) PORT_CHAR('%') // u grave
PORT_BIT(0x10,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_TILDE) PORT_CHAR('*') PORT_CHAR(0x00a7U) // section
PORT_BIT(0x20,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_COMMA) 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(0x00f2U) PORT_CHAR('!') // o grave
PORT_START("LINE6")
PORT_BIT(0x01,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
PORT_BIT(0x02,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_ENTER) PORT_CHAR(0x000dU)
PORT_BIT(0x04,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("S1") PORT_CODE(KEYCODE_BACKSLASH)
PORT_BIT(0x08,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("S2") PORT_CODE(KEYCODE_BACKSPACE)
PORT_BIT(0x10,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("Keypad .") PORT_CODE(KEYCODE_DEL_PAD) PORT_CHAR(UCHAR_MAMEKEY(DEL_PAD))
PORT_BIT(0x20,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_0_PAD) PORT_CHAR(UCHAR_MAMEKEY(0_PAD))
PORT_BIT(0x40,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_ENTER_PAD) PORT_CHAR(UCHAR_MAMEKEY(00_PAD))
PORT_BIT(0x80,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_1_PAD) PORT_CHAR(UCHAR_MAMEKEY(1_PAD))
PORT_START("LINE7")
PORT_BIT(0x01,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_2_PAD) PORT_CHAR(UCHAR_MAMEKEY(2_PAD))
PORT_BIT(0x02,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_3_PAD) PORT_CHAR(UCHAR_MAMEKEY(3_PAD))
PORT_BIT(0x04,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_4_PAD) PORT_CHAR(UCHAR_MAMEKEY(4_PAD))
PORT_BIT(0x08,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_5_PAD) PORT_CHAR(UCHAR_MAMEKEY(5_PAD))
PORT_BIT(0x10,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_6_PAD) PORT_CHAR(UCHAR_MAMEKEY(6_PAD))
PORT_BIT(0x20,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_7_PAD) PORT_CHAR(UCHAR_MAMEKEY(7_PAD))
PORT_BIT(0x40,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_8_PAD) PORT_CHAR(UCHAR_MAMEKEY(8_PAD))
PORT_BIT(0x80,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_9_PAD) PORT_CHAR(UCHAR_MAMEKEY(9_PAD))
PORT_START("LINE8")
PORT_BIT(0x01,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_PLUS_PAD) PORT_CHAR(UCHAR_MAMEKEY(PLUS_PAD))
PORT_BIT(0x02,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_MINUS_PAD) PORT_CHAR(UCHAR_MAMEKEY(MINUS_PAD))
PORT_BIT(0x04,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_ASTERISK) PORT_CHAR(UCHAR_MAMEKEY(ASTERISK))
PORT_BIT(0x08,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_CODE(KEYCODE_SLASH_PAD) PORT_CHAR(UCHAR_MAMEKEY(SLASH_PAD))
PORT_BIT(0xf0,IP_ACTIVE_HIGH,IPT_UNUSED)
PORT_START("MODIFIERS")
PORT_BIT(0x01,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("COMMAND") PORT_CODE(KEYCODE_TAB)
PORT_BIT(0x02,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("CTRL") PORT_CODE(KEYCODE_LCONTROL) PORT_CHAR(UCHAR_MAMEKEY(LCONTROL))
PORT_BIT(0x04,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("R SHIFT") PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
PORT_BIT(0x08,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("L SHIFT") PORT_CODE(KEYCODE_LSHIFT)
PORT_BIT(0xf0,IP_ACTIVE_HIGH,IPT_UNUSED)
INPUT_PORTS_END
} // anonymous namespace
m20_keyboard_device::m20_keyboard_device(const machine_config& mconfig, const char* tag, device_t* owner, uint32_t clock)
: buffered_rs232_device(mconfig, M20_KEYBOARD, tag, owner, 0)
, device_matrix_keyboard_interface(mconfig, *this, "LINE0", "LINE1", "LINE2", "LINE3", "LINE4", "LINE5", "LINE6", "LINE7", "LINE8")
, m_modifiers(*this, "MODIFIERS")
{
}
ioport_constructor m20_keyboard_device::device_input_ports() const
{
return INPUT_PORTS_NAME(m20_keyboard);
}
void m20_keyboard_device::device_reset()
{
buffered_rs232_device::device_reset();
reset_key_state();
clear_fifo();
set_data_frame(1, 8, PARITY_NONE, STOP_BITS_2);
set_rate(1'200);
receive_register_reset();
transmit_register_reset();
output_dcd(0);
output_dsr(0);
output_cts(0);
output_rxd(1);
start_processing(attotime::from_hz(1'200));
}
void m20_keyboard_device::key_make(uint8_t row, uint8_t column)
{
uint8_t const row_code(((row < 6U) ? row : (0x18U | (row - 6U))) << 3);
uint8_t const modifiers(m_modifiers->read());
uint8_t mod_code(0U);
switch (modifiers)
{
case 0x01U: // COMMAND
mod_code = 0x90;
break;
case 0x02U: // CTRL
mod_code = 0x60;
break;
case 0x04U: // RSHIFT
case 0x08U: // LSHIFT
case 0x0cU: // LSHIFT|RSHIFT
mod_code = 0x30;
break;
}
transmit_byte((row_code | column) + mod_code);
}
void m20_keyboard_device::received_byte(uint8_t byte)
{
switch (byte)
{
case 0x03U:
transmit_byte(0x02U);
break;
case 0x80U:
transmit_byte(0x80U);
break;
default:
logerror("received unknown command %02x", byte);
}
}
DEFINE_DEVICE_TYPE(M20_KEYBOARD, m20_keyboard_device, "m20_kbd", "Olivetti M20 Keyboard")