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diff --git a/src/mame/machine/alfaskop_s41_kb.cpp b/src/mame/machine/alfaskop_s41_kb.cpp
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+++ b/src/mame/machine/alfaskop_s41_kb.cpp
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+// license:BSD-3-Clause
+// copyright-holders: Joakim Larsson Edström
+/**********************************************************************
+
+ Alfaskop 4110 keyboard, emulation of the KeyBoard Unit KBU 4140. which often
+ was attached to the numerical Keyboard eXpansion Unit KXE 4141 which is not
+ emulated yet. There is also an optional Magnetic Identification Device MID 4131
+
+ TTL-level bi-directional serial matrix keyboard
+
+ The KBU 4140 keyboard is controlled by a MC6802@3'579'000Hz in combo with a MC6846.
+ The key matrix is scanned with the help of two 74LS164 which is also extended to the
+ KXE 4141. The columns are read through a 74LS240. There are 8 LEDs which are
+ latched by a 74LS374. The I/O port on the MC6846 is connected to a magnet strip
+ reader through a MIA interface
+
+ The keyboard serial interface line is interpreted and generated by the timer in
+ the MC6846 where both TX and Rx shares the same line on the keyboard side. The
+ keyboard remains silent until spoken to by the host computer to avoid collisions.
+
+ Credits
+ -------
+ The MC6846 ROM and address decoder ROM were dumped by Dalby Datormuseum whom
+ also provided documentation and schematics of the keyboard
+
+ https://sites.google.com/site/dalbydatormuseum/home
+
+ **********************************************************************/
+
+#include "emu.h"
+#include "alfaskop_s41_kb.h"
+#include "cpu/m6800/m6800.h"
+
+//**************************************************************************
+// CONFIGURABLE LOGGING
+//**************************************************************************
+#define LOG_IRQ (1U << 1)
+#define LOG_RESET (1U << 2)
+#define LOG_BITS (1U << 3)
+#define LOG_UI (1U << 4)
+#define LOG_LEDS (1U << 5)
+#define LOG_ROM (1U << 6)
+#define LOG_ADEC (1U << 7)
+#define LOG_IO (1U << 8)
+
+//#define VERBOSE (LOG_GENERAL|LOG_IO|LOG_IRQ|LOG_LEDS|LOG_BITS|LOG_RESET)
+//#define LOG_OUTPUT_STREAM std::cout
+
+#include "logmacro.h"
+
+#define LOGIRQ(...) LOGMASKED(LOG_IRQ, __VA_ARGS__)
+#define LOGRST(...) LOGMASKED(LOG_RESET, __VA_ARGS__)
+#define LOGBITS(...) LOGMASKED(LOG_BITS, __VA_ARGS__)
+#define LOGUI(...) LOGMASKED(LOG_UI, __VA_ARGS__)
+#define LOGLEDS(...) if (!machine().side_effects_disabled()) LOGMASKED(LOG_LEDS, __VA_ARGS__)
+#define LOGROM(...) if (!machine().side_effects_disabled()) LOGMASKED(LOG_ROM, __VA_ARGS__)
+#define LOGADEC(...) if (!machine().side_effects_disabled()) LOGMASKED(LOG_ADEC, __VA_ARGS__)
+#define LOGIO(...) if (!machine().side_effects_disabled()) LOGMASKED(LOG_IO, __VA_ARGS__)
+
+//**************************************************************************
+// MACROS / CONSTANTS
+//**************************************************************************
+
+#define M6800_TAG "mcu"
+
+namespace {
+
+INPUT_PORTS_START(alfaskop_s41_kb)
+ PORT_START("P15")
+ PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("KP 6") PORT_CODE(KEYCODE_6_PAD) PORT_CODE(KEYCODE_RIGHT) PORT_CHAR('6') PORT_CHAR(UCHAR_MAMEKEY(RIGHT)) // 77
+ PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("KP +") PORT_CODE(KEYCODE_PLUS_PAD) PORT_CHAR('+') // 78
+ PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("KP 5") PORT_CODE(KEYCODE_5_PAD) PORT_CHAR('5') // 76
+ PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("* PRINT") PORT_CODE(KEYCODE_TILDE) PORT_CHAR('*') PORT_CHAR(UCHAR_MAMEKEY(PRTSCR)) // 55
+ PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("R Shift") PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1) // 54
+ PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('_') // 53
+ PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME(". :") PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR(':') // 52
+ PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("F5") PORT_CODE(KEYCODE_F5) PORT_CHAR(UCHAR_MAMEKEY(F5)) // 63
+ PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("F6") PORT_CODE(KEYCODE_F6) PORT_CHAR(UCHAR_MAMEKEY(F6)) // 64
+ PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_UNUSED ) // no scancode is sent
+ PORT_BIT( 0x0400, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("CTRL") PORT_CODE(KEYCODE_LCONTROL) PORT_CHAR(UCHAR_MAMEKEY(LCONTROL)) // 29
+ PORT_BIT( 0x0800, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME(", ;") PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR(';') // 51
+ PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_D) PORT_CHAR('D') PORT_CHAR('d') // 32
+ PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_X) PORT_CHAR('X') PORT_CHAR('x') // 45
+ PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_C) PORT_CHAR('C') PORT_CHAR('c') // 46
+ PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_J) PORT_CHAR('J') PORT_CHAR('j') // 36
+
+ PORT_START("P14")
+ PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_UNUSED ) // 00 - keyboard error
+ PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("BREAK") PORT_CODE(KEYCODE_PAUSE) PORT_CHAR(UCHAR_MAMEKEY(PAUSE)) // 70
+ PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("KP 7") PORT_CODE(KEYCODE_7_PAD) PORT_CHAR('7') PORT_CHAR(UCHAR_MAMEKEY(HOME)) // 71
+ PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_UNUSED ) // ff - keyboard error
+ PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_TILDE) PORT_CHAR('^') PORT_CHAR('~') PORT_CHAR(']') // 27
+ PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR(0x00e5) PORT_CHAR(0x00c5) PORT_CHAR('[') // 26 å Å
+ PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_P) PORT_CHAR('P') PORT_CHAR('p') // 25
+ PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("F1") PORT_CODE(KEYCODE_F1) PORT_CHAR(UCHAR_MAMEKEY(F1)) // 59
+ PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("F2") PORT_CODE(KEYCODE_F2) PORT_CHAR(UCHAR_MAMEKEY(F2)) // 60
+ PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W') // 17
+ PORT_BIT( 0x0400, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E') // 18
+ PORT_BIT( 0x0800, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O') // 24
+ PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R') // 19
+ PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T') // 20
+ PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y') // 21
+ PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I') // 23
+
+ PORT_START("P13")
+ PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_NUMLOCK) PORT_CHAR(UCHAR_MAMEKEY(NUMLOCK)) // 69
+ PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_UNUSED ) // ff - keyboard error
+ PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("BS DEL") PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8) PORT_CHAR(UCHAR_MAMEKEY(DEL)) // 14
+ PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('=') PORT_CHAR('+') // 13
+ PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('_') // 12
+ PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHAR(')') // 11
+ PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR('(') // 10
+ PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!') // 02
+ PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("ESC") PORT_CODE(KEYCODE_ESC) PORT_CHAR(UCHAR_MAMEKEY(ESC)) // 01
+ PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('@') // 03
+ PORT_BIT( 0x0400, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#') // 04
+ PORT_BIT( 0x0800, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('*') // 09
+ PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$') // 05
+ PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%') // 06
+ PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('^') // 07
+ PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('&') // 08
+
+ PORT_START("P12")
+ PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("KP 9") PORT_CODE(KEYCODE_9_PAD) PORT_CHAR('9') PORT_CHAR(UCHAR_MAMEKEY(PGUP)) // 73
+ PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("KP -") PORT_CODE(KEYCODE_MINUS_PAD) PORT_CHAR(UCHAR_MAMEKEY(MINUS_PAD)) // 74
+ PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("KP 8") PORT_CODE(KEYCODE_8_PAD) PORT_CODE(KEYCODE_UP) PORT_CHAR('8') PORT_CHAR(UCHAR_MAMEKEY(UP)) // 72
+ PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_TILDE) PORT_CHAR('`') PORT_CHAR('~') // 41
+ PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR('\'') PORT_CHAR('"') // 40
+ PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR(':') // 39
+ PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L') // 38
+ PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("F3") PORT_CODE(KEYCODE_F3) PORT_CHAR(UCHAR_MAMEKEY(F3)) // 61
+ PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("F4") PORT_CODE(KEYCODE_F4) PORT_CHAR(UCHAR_MAMEKEY(F4)) // 62
+ PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q') // 16
+ PORT_BIT( 0x0400, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("TAB") PORT_CODE(KEYCODE_TAB) PORT_CHAR(9) // 15
+ PORT_BIT( 0x0800, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K') // 37
+ PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F') // 33
+ PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G') // 34
+ PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H') // 35
+ PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U') // 22
+
+ PORT_START("P11")
+ PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_DEL_PAD) PORT_CHAR(UCHAR_MAMEKEY(COMMA_PAD)) // 83
+ PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("RETURN") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13) // 28
+ PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("KP 0") PORT_CODE(KEYCODE_0_PAD) PORT_CHAR('0') PORT_CHAR(UCHAR_MAMEKEY(INSERT)) // 82
+ PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_UNUSED ) // 89 - no key
+ PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_UNUSED ) // 86 - no key
+ PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_UNUSED ) // 87 - no key
+ PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_UNUSED ) // 88 - no key
+ PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("F9") PORT_CODE(KEYCODE_F9) PORT_CHAR(UCHAR_MAMEKEY(F9)) // 67
+ PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("F10") PORT_CODE(KEYCODE_F10) PORT_CHAR(UCHAR_MAMEKEY(F10)) // 68
+ PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_UNUSED ) // scan code ff - keyboard error
+ PORT_BIT( 0x0400, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR('\\') // 43
+ PORT_BIT( 0x0800, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("CAPS LOCK") PORT_CODE(KEYCODE_CAPSLOCK) PORT_CHAR(UCHAR_MAMEKEY(CAPSLOCK)) // 58
+ PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("SHIFT LOCK") PORT_CODE(KEYCODE_LALT) // 56
+ PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_UNUSED ) // 85 - no key
+ PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V') // 47
+ PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ') // 57
+
+ PORT_START("P10")
+ PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("KP 3") PORT_CODE(KEYCODE_3_PAD) PORT_CODE(KEYCODE_PGDN) // 81
+ PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_UNUSED ) // ff - keyboard error
+ PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("KP 2") PORT_CODE(KEYCODE_2_PAD) PORT_CODE(KEYCODE_DOWN) PORT_CHAR(UCHAR_MAMEKEY(2_PAD)) // 80
+ PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("NEW LINE") PORT_CODE(KEYCODE_ENTER_PAD) PORT_CHAR(UCHAR_MAMEKEY(ENTER_PAD)) // 84 (programmable, default is 28)
+ PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("KP 1") PORT_CODE(KEYCODE_1_PAD) PORT_CHAR(UCHAR_MAMEKEY(1_PAD)) // 79
+ PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("KP 4") PORT_CODE(KEYCODE_4_PAD) PORT_CODE(KEYCODE_LEFT) PORT_CHAR('4') PORT_CHAR(UCHAR_MAMEKEY(LEFT)) // 75
+ PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_UNUSED ) // ff - keyboard error
+ PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("F7") PORT_CODE(KEYCODE_F7) PORT_CHAR(UCHAR_MAMEKEY(F7)) // 65
+ PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("F8") PORT_CODE(KEYCODE_F8) PORT_CHAR(UCHAR_MAMEKEY(F8)) // 66
+ PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_LSHIFT) PORT_CHAR(UCHAR_SHIFT_1) // 42
+ PORT_BIT( 0x0400, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z') // 44
+ PORT_BIT( 0x0800, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M') // 50
+ PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A') // 30
+ PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S') // 31
+ PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B') // 48
+ PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N') // 49
+INPUT_PORTS_END
+
+
+//-------------------------------------------------
+// ROM( alfaskop_s41_kb )
+//-------------------------------------------------
+
+ROM_START( alfaskop_s41_kb )
+ ROM_REGION( 0x800, M6800_TAG, 0 )
+ ROM_LOAD( "kbc_e34066_0000_ic3.bin", 0x000, 0x800, CRC(a1232241) SHA1(45d1b038bfbd04e1b7e3718a27202280c5257989) )
+ ROM_REGION( 0x20, "ad_rom", 0 ) // Address decoder
+ ROM_LOAD( "kbc_e34066_0000_ic4_e3405970280400.bin", 0x00, 0x20, CRC(f26acca3) SHA1(ac8c607d50bb588c1da4ad1602665c785ebd29b3) )
+ROM_END
+
+} // anonymous namespace
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE(ALFASKOP_S41_KB, alfaskop_s41_keyboard_device, "alfaskop_s41_kb", "Alfaskop 4110 keyboard")
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// alfaskop_s41_keyboard_device - constructor
+//-------------------------------------------------
+
+alfaskop_s41_keyboard_device::alfaskop_s41_keyboard_device(
+ machine_config const &mconfig,
+ char const *tag,
+ device_t *owner,
+ uint32_t clock)
+ : device_t(mconfig, ALFASKOP_S41_KB, tag, owner, clock)
+ , m_mcu(*this, M6800_TAG)
+ , m_mc6846(*this, "mc6846")
+ , m_rows(*this, "P1%u", 0)
+ , m_txd_cb(*this)
+ , m_leds_cb(*this)
+ , m_rxd_high(true)
+ , m_txd_high(true)
+ , m_hold(true)
+ , m_col_select(0)
+ , m_p1(0)
+ , m_leds(0)
+{
+}
+
+WRITE_LINE_MEMBER(alfaskop_s41_keyboard_device::rxd_w)
+{
+ LOGBITS("KBD bit presented: %d\n", state);
+ //m_rxd_high = CLEAR_LINE != state;
+}
+
+// WRITE_LINE_MEMBER(alfaskop_s41_keyboard_device::hold_w)
+// {
+// m_hold = CLEAR_LINE == state;
+// }
+
+WRITE_LINE_MEMBER(alfaskop_s41_keyboard_device::rst_line_w)
+{
+ if (state == CLEAR_LINE)
+ {
+ m_mcu->set_input_line(INPUT_LINE_RESET, CLEAR_LINE);
+ LOGRST("KBD: Keyboard mcu reset line is cleared\n");
+ }
+ else
+ {
+ m_mcu->set_input_line(INPUT_LINE_RESET, ASSERT_LINE);
+ LOGRST("KBD: Keyboard mcu reset line is asserted\n");
+ }
+}
+
+//-------------------------------------------------
+// device_start - device specific startup
+//-------------------------------------------------
+
+void alfaskop_s41_keyboard_device::device_start()
+{
+ m_txd_cb.resolve_safe();
+ m_leds_cb.resolve_safe();
+
+ save_item(NAME(m_rxd_high));
+ save_item(NAME(m_txd_high));
+ save_item(NAME(m_col_select));
+
+ m_rxd_high = true;
+ m_txd_high = true;
+ m_col_select = 0;
+}
+
+
+
+//-------------------------------------------------
+// device_add_mconfig - add device configuration
+//-------------------------------------------------
+
+void alfaskop_s41_keyboard_device::device_add_mconfig(machine_config &config)
+{
+ M6802(config, m_mcu, XTAL(3'579'545)); // Crystal verified from schematics
+ m_mcu->set_addrmap(AS_PROGRAM, &alfaskop_s41_keyboard_device::alfaskop_s41_kb_mem);
+
+ MC6846(config, m_mc6846, XTAL(3'579'545) / 4); // Driven by E from 6802 == XTAL / 4
+ m_mc6846->irq().set([this](bool state)
+ {
+ LOGIRQ(" [timer IRQ: %s] ", state == ASSERT_LINE ? "asserted" : "cleared");
+ m_mcu->set_input_line(M6802_IRQ_LINE, state);
+ });
+ m_mc6846->cp2().set([this](bool state){ LOG("CP2:%d\n", state); });
+ // MIA ID interrupt: m_mc6846->set_input_cp1(1);
+ m_mc6846->cto().set([this](bool state){ LOG("CTO:%d\n", state); }); // Not connected to anything
+}
+
+//-------------------------------------------------
+// input_ports - device-specific input ports
+//-------------------------------------------------
+
+ioport_constructor alfaskop_s41_keyboard_device::device_input_ports() const
+{
+ return INPUT_PORTS_NAME( alfaskop_s41_kb );
+}
+
+//-------------------------------------------------
+// ADDRESS_MAP( alfaskop_s41_kb_mem )
+//-------------------------------------------------
+
+void alfaskop_s41_keyboard_device::alfaskop_s41_kb_mem(address_map &map)
+{
+ map(0x0000, 0x007f).ram(); // Internal RAM
+ /* A 32 byte decoder ROM connects A0-A4 to A11, A12, A13, A15 and to an external port pin, A14 is not decoded!
+ * c3 c3 c3 c3 c3 c3 c3 c3 c3 c3 c3 c3 c3 c3 c3 c3 - if external port pin is low
+ * c3 c3 c3 c3 c5 c6 cb c3 d3 c3 c3 c3 c3 c3 43 f3 - if external port pin is high - normal operation
+ *
+ * Decoder rom byte bits as follows
+ * 0 - 0x01 Start scanning
+ * 1 - 0x02 read col
+ * 2 - 0x04 shift col clock
+ * 3 - 0x08 set lamp data
+ * 4 - 0x10 CS1 mc6846 I/O access - active low
+ * 5 - 0x20 CS0 mc6846 ROM access - active high
+ * 6 - 0x40 n/c?
+ * 7 - 0x80 to KBX
+ *
+ * F3 <- 0x0f <- 1-11 1 == b800-bfff, f800-ffff // 1111 0011 MC6846 Internal ROM access (CS0 - active high)
+ * 43 <- 0x0e <- 1-11 0 == b000-b7ff, f000-f7ff // 0100 0011
+ * c3 <- 0x0d <- 1-10 1 == a800-afff, e800-efff // 1100 0011
+ * c3 <- 0x0c <- 1-10 0 == a000-a7ff, e000-e7ff // 1100 0011
+ * c3 <- 0x0b <- 1-01 1 == 9800-9fff, d800-dfff // 1100 0011
+ * c3 <- 0x0a <- 1-01 0 == 9000-97ff, d000-d7ff // 1100 0011
+ * c3 <- 0x09 <- 1-00 1 == 8800-8fff, c800-cfff // 1100 0011
+ * d3 <- 0x08 <- 1-00 0 == 8000-87ff, c000-c7ff // 1101 0011 MC6846 Internal I/O access (CS1 - active high)
+
+ * c3 <- 0x07 <- 0-11 1 == 3800-3fff, 7800-7fff // 1100 0011
+ * cb <- 0x06 <- 0-11 0 == 3000-37ff, 7000-77ff // 1100 1011 Set lamp data
+ * c6 <- 0x05 <- 0-10 1 == 2800-2fff, 6800-6fff // 1100 0110 start scan
+ * c5 <- 0x04 <- 0-10 0 == 2000-27ff, 6000-67ff // 1100 0101 read col
+ * c3 <- 0x03 <- 0-01 1 == 1800-1fff, 5800-5fff // 1100 0011
+ * c3 <- 0x02 <- 0-01 0 == 1000-17ff, 5000-57ff // 1100 0011
+ * c3 <- 0x01 <- 0-00 1 == 0800-0fff, 4800-4fff // 1100 0011
+ * c3 <- 0x00 <- 0-00 0 == 0000-07ff, 4000-47ff // 1100 0011
+ */
+ map(0x0080, 0xffff).lrw8(NAME([this](address_space &space, offs_t offset) -> uint8_t
+ {
+ uint16_t addr = offset + 0x80;
+ uint8_t index = 0x10 | ((((addr & 0x8000) | ((addr & 0x3800) << 1)) >> 12) & 0x000f); // 0x10 | (((A15 | A13 | A12 | A11) >> 12)
+ uint8_t ret = 0;
+ LOGADEC("address_r %04x -> index %02x: %02x\n", offset + 0x80, index, memregion("ad_rom")->base ()[index]);
+ switch (memregion("ad_rom")->base ()[index])
+ {
+ case 0xf3:
+ ret = memregion(M6800_TAG)->base ()[addr & 0x07ff];
+ LOGROM(" - ROM %04x: %02x\n", addr & 0x7ff, ret);
+ break;
+ case 0xd3:
+ LOGIO(" - I/O read mc6846 %04x", addr & 0x07);
+ ret = m_mc6846->read(space, (offs_t)(addr & 0x07));
+ LOGIO(": %02x\n", ret);
+ break;
+ case 0xc3:
+ break; // Idle
+ default:
+ logerror(" - unmapped read access at %04x through %02x\n", addr, memregion("ad_rom")->base ()[index]);
+ }
+ return ret;
+ }),
+ NAME( [this](address_space &space, offs_t offset, uint8_t data)
+ {
+ uint16_t addr = offset + 0x80;
+ uint8_t index = 0x10 | ((((addr & 0x8000) | ((addr & 0x3800) << 1)) >> 12) & 0x000f); // 0x10 | (((A15 | A13 | A12 | A11) >> 12)
+ LOGADEC("address_w %04x -> index %02x: %02x\n", offset + 0x80, index, memregion("ad_rom")->base ()[index]);
+ switch (memregion("ad_rom")->base ()[index])
+ {
+ case 0xd3:
+ LOGIO(" - I/O write mc6846 %04x, %02x\n", addr & 0x07, data);
+ m_mc6846->write(space, (offs_t)(addr & 0x07), data);
+ break;
+ case 0xcb: // Leds
+ if (m_leds != data)
+ {
+ m_leds_cb(data); m_leds = data;
+ LOGLEDS(" - I/O write LEDs %04x, %02x\n", addr, data);
+ }
+ break;
+ case 0xc3:
+ break; // Idle
+ default:
+ logerror(" - unmapped write access at %04x, %02x through %02x\n", addr, data, memregion("ad_rom")->base ()[index]);
+ }
+ }));
+ // map(0xf800, 0xffff).rom().region(M6800_TAG,0);
+}
+
+//-------------------------------------------------
+// rom_region - device-specific ROM region
+//-------------------------------------------------
+
+const tiny_rom_entry *alfaskop_s41_keyboard_device::device_rom_region() const
+{
+ return ROM_NAME( alfaskop_s41_kb );
+}