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tv912.cpp: Update comments; add some more inputs (nw)

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This commit is contained in:
AJR 2018-01-18 22:41:10 -05:00
parent 263cfa1292
commit 8f33cd9044
1 changed files with 99 additions and 47 deletions
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146
src/mame/drivers/tv912.cpp
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@ -8,10 +8,43 @@
from each other in the number and pattern of keys on the nondetachable
keyboard. Those with a B suffix had a TTY-style keyboard, while the C
suffix indicated a typewriter-style keyboard. The TVI-920 added a row of
function keys but was otherwise mostly identical to the TVI-912.
function keys but was otherwise mostly identical to the TVI-912. The
TVI-912C keyboard matrix and ribbon connector pinout are almost the same
as in the TVI-910.
The baud rate switches are mounted vertically at the rear of the unit.
Only one switch may be down (closed) at a time.
Settings for these terminals are controlled by DIP switches, which are not
read by the CPU except for those of S4 (which is usually left as a block of
bare jumpers) and the half-duplex and 50/60 Hz switches of S2. Four to five
of the S2 switches directly manipulate UART pins to select the number and
framing of data bits. Position 8 (NB2) is deliberately disconnected on
later revisions to restrict communications to 7 or 8 data bits, likely
because of known incompatibilities between UART models in 5-bit data mode.
The baud rate switches (S1/S3) are mounted vertically at the rear of the
unit. As these are connected directly to the frequency outputs of the baud
rate generation circuit (which consists mainly of the LS163s at A73, A70,
A71 and A72), only one switch may be down (closed) at a time. (The nominal
"75 baud" output of this circuit doubles as the beep sound frequency.)
Originally the UART was connected to receive and transmit data at the
printer rate when the printer was selected, even though it did not receive
any data through the printer connector. Later board revisions fixed this
by tying the signal selected by S1 to the UART's RCP; S3 could be similarly
tied to TCP by modifying a couple of jumpers.
The hardware appears to have been originally designed to access two 2316E
program ROMs (alternatively 8316E or 2716), with the lower 2K at A50 and
upper 2K at A49. These were ultimately merged into a single 2332 or 8332A
at A49; several jumpers in the area could be inserted or removed to
accommodate these different ROM types. The later A49B1 and A49C1 ROMs were
apparently interchangeable between TVI-912B/C and TVI-920B/C. Part or all
of the program ROM could also be made internal to the CPU by replacing the
8035 with a 8048, 8748 or 8049 and grounding the EA pin by inserting a
jumper at W1.
Each displayed character nominally consists of 6 x 8 dots within a 7 x 10
cell. However, the lowest two bits of each row of character data may be
set to shift either the first three dots, the last three dots or both
forward by half a dot, thus effectively doubling horizontal resolution.
*******************************************************************************/
@ -44,12 +77,14 @@ public:
, m_printer_baud(*this, "PRINTBAUD")
, m_uart_control(*this, "UARTCTRL")
, m_modifiers(*this, "MODIFIERS")
, m_half_duplex(*this, "HALFDUP")
, m_jumpers(*this, "JUMPERS")
, m_option(*this, "OPTION")
, m_baudgen_timer(nullptr)
{ }
DECLARE_WRITE8_MEMBER(p1_w);
DECLARE_READ8_MEMBER(p2_r);
DECLARE_WRITE8_MEMBER(p2_w);
DECLARE_READ8_MEMBER(crtc_r);
DECLARE_WRITE8_MEMBER(crtc_w);
@ -87,6 +122,7 @@ private:
required_ioport m_printer_baud;
required_ioport m_uart_control;
required_ioport m_modifiers;
required_ioport m_half_duplex;
required_ioport m_jumpers;
required_ioport m_option;
@ -103,15 +139,23 @@ WRITE8_MEMBER(tv912_state::p1_w)
m_keyboard_scan = data;
}
READ8_MEMBER(tv912_state::p2_r)
{
// P27: -HALF DUPLEX
u8 result = m_half_duplex->read() << 7;
// P26: -PTR RDY
// P25: -DCR
return result | 0x7f;
}
WRITE8_MEMBER(tv912_state::p2_w)
{
// P20-P23: Address Signals (4MSBS)
m_bankdev->set_bank(data & 0x0f);
// P24: +4Hz Flasher
// P25: -DCR
// P26: -PTR RDY
// P27: -HALF DUPLEX
}
READ8_MEMBER(tv912_state::crtc_r)
@ -232,7 +276,7 @@ void tv912_state::machine_reset()
m_uart->set_input_pin(AY31015_NP, BIT(uart_ctrl, 4));
m_uart->set_input_pin(AY31015_TSB, BIT(uart_ctrl, 3));
m_uart->set_input_pin(AY31015_NB1, BIT(uart_ctrl, 2));
m_uart->set_input_pin(AY31015_NB2, 1);
m_uart->set_input_pin(AY31015_NB2, BIT(uart_ctrl, 1));
m_uart->set_input_pin(AY31015_EPS, BIT(uart_ctrl, 0));
m_uart->set_input_pin(AY31015_CS, 1);
}
@ -262,7 +306,7 @@ INPUT_CHANGED_MEMBER(tv912_state::uart_settings_changed)
m_uart->set_input_pin(AY31015_NP, BIT(uart_ctrl, 4));
m_uart->set_input_pin(AY31015_TSB, BIT(uart_ctrl, 3));
m_uart->set_input_pin(AY31015_NB1, BIT(uart_ctrl, 2));
// S2:8 was probably connected to NB2 on earlier hardware revisions
m_uart->set_input_pin(AY31015_NB2, BIT(uart_ctrl, 1));
m_uart->set_input_pin(AY31015_EPS, BIT(uart_ctrl, 0));
}
@ -301,21 +345,28 @@ static INPUT_PORTS_START( switches )
PORT_DIPNAME(0x08, 0x00, "Stop Bits") PORT_DIPLOCATION("S2:6") PORT_CHANGED_MEMBER(DEVICE_SELF, tv912_state, uart_settings_changed, nullptr)
PORT_DIPSETTING(0x00, "1")
PORT_DIPSETTING(0x08, "2")
PORT_DIPNAME(0x04, 0x04, "Data Bits") PORT_DIPLOCATION("S2:7") PORT_CHANGED_MEMBER(DEVICE_SELF, tv912_state, uart_settings_changed, nullptr)
PORT_DIPSETTING(0x00, "7")
PORT_DIPSETTING(0x04, "8")
PORT_DIPUNUSED_DIPLOC(0x02, 0x02, "S2:8")
PORT_DIPNAME(0x06, 0x06, "Data Bits") PORT_DIPLOCATION("S2:8,7") PORT_CHANGED_MEMBER(DEVICE_SELF, tv912_state, uart_settings_changed, nullptr)
PORT_DIPSETTING(0x00, "5")
PORT_DIPSETTING(0x04, "6")
PORT_DIPSETTING(0x02, "7")
PORT_DIPSETTING(0x06, "8")
// S2:8 is not connected on later revisions
PORT_START("MODIFIERS")
PORT_DIPNAME(0x80, 0x80, "Refresh Rate") PORT_DIPLOCATION("S2:4")
PORT_DIPSETTING(0x00, "50 Hz")
PORT_DIPSETTING(0x80, "60 Hz")
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Alpha Lock") PORT_CODE(KEYCODE_CAPSLOCK)
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Shift") PORT_CHAR(UCHAR_SHIFT_1) PORT_CODE(KEYCODE_LSHIFT)
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Shift") PORT_CHAR(UCHAR_SHIFT_1) PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT)
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Ctrl") PORT_CHAR(UCHAR_SHIFT_2) PORT_CODE(KEYCODE_LCONTROL)
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Funct") PORT_CODE(KEYCODE_LALT)
PORT_BIT(0x23, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("HALFDUP")
PORT_DIPNAME(0x01, 0x01, "Communication Mode") PORT_DIPLOCATION("S2:3")
PORT_DIPSETTING(0x01, "Full Duplex")
PORT_DIPSETTING(0x00, "Half Duplex")
PORT_START("JUMPERS")
PORT_DIPNAME(0x08, 0x08, "Automatic CRLF") PORT_DIPLOCATION("S4:1") // or jumper W31
PORT_DIPSETTING(0x08, DEF_STR(Off))
@ -352,38 +403,38 @@ static INPUT_PORTS_START( tv912b )
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("KEY2")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR(',') PORT_CHAR('<') PORT_CODE(KEYCODE_COMMA)
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR(',') PORT_CHAR('<') PORT_CODE(KEYCODE_COMMA) //PORT_CODE(KEYCODE_COMMA_PAD)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('v') PORT_CHAR('V') PORT_CHAR(0x16) PORT_CODE(KEYCODE_V)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("KEY3")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('.') PORT_CHAR('>') PORT_CODE(KEYCODE_STOP)
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('.') PORT_CHAR('>') PORT_CODE(KEYCODE_STOP) PORT_CODE(KEYCODE_DEL_PAD)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('b') PORT_CHAR('B') PORT_CHAR(0x02) PORT_CODE(KEYCODE_B)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("KEY4")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('4') PORT_CHAR('$') PORT_CODE(KEYCODE_4)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR(0x09) PORT_CODE(KEYCODE_ESC)
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('4') PORT_CHAR('$') PORT_CODE(KEYCODE_4) PORT_CODE(KEYCODE_4_PAD)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR(0x09) PORT_CODE(KEYCODE_ESC) PORT_CODE(KEYCODE_TAB_PAD)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN) // some non-printing character
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("KEY5")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('5') PORT_CHAR('%') PORT_CODE(KEYCODE_5)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('1') PORT_CHAR('!') PORT_CODE(KEYCODE_1)
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('5') PORT_CHAR('%') PORT_CODE(KEYCODE_5) PORT_CODE(KEYCODE_5_PAD)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('1') PORT_CHAR('!') PORT_CODE(KEYCODE_1) PORT_CODE(KEYCODE_1_PAD)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("KEY6")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('6') PORT_CHAR('&') PORT_CODE(KEYCODE_6)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('2') PORT_CHAR('\"') PORT_CODE(KEYCODE_2)
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('6') PORT_CHAR('&') PORT_CODE(KEYCODE_6) PORT_CODE(KEYCODE_6_PAD)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('2') PORT_CHAR('\"') PORT_CODE(KEYCODE_2) PORT_CODE(KEYCODE_2_PAD)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("KEY7")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('7') PORT_CHAR('\'') PORT_CODE(KEYCODE_7)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('3') PORT_CHAR('#') PORT_CODE(KEYCODE_3)
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('7') PORT_CHAR('\'') PORT_CODE(KEYCODE_7) PORT_CODE(KEYCODE_7_PAD)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('3') PORT_CHAR('#') PORT_CODE(KEYCODE_3) PORT_CODE(KEYCODE_3_PAD)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
@ -436,37 +487,37 @@ static INPUT_PORTS_START( tv912b )
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("KEY16")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR(0x0d) PORT_CODE(KEYCODE_ENTER)
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Return") PORT_CHAR(0x0d) PORT_CODE(KEYCODE_ENTER)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('i') PORT_CHAR('I') PORT_CODE(KEYCODE_I)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN) // control character 0xc9
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("KEY17")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) // control character 0xd0
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) // control character 0xd0 (PRINT)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('o') PORT_CHAR('O') PORT_CHAR(0x0f) PORT_CODE(KEYCODE_O)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN) // control character 0xd1
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("KEY18")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) // control character 0x7f
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Rub Out") PORT_CHAR(0x08) PORT_CODE(KEYCODE_QUOTE)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('p') PORT_CHAR('P') PORT_CHAR(0x10) PORT_CODE(KEYCODE_P)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("KEY19")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) // control character 0x9a
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) // control character 0x9a (BREAK)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Line Feed") PORT_CHAR(0x0a) PORT_CODE(KEYCODE_INSERT)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("KEY20")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) // control character 0x1f
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) // control character 0x1f (PAGE)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('l') PORT_CHAR('L') PORT_CODE(KEYCODE_L)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN) // control character 0xb5
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("KEY21")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Rub Out") PORT_CHAR(0x08) PORT_CODE(KEYCODE_DEL)
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(LEFT)) PORT_CODE(KEYCODE_LEFT)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR(';') PORT_CHAR('+') PORT_CODE(KEYCODE_COLON)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
@ -508,26 +559,26 @@ static INPUT_PORTS_START( tv912b )
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("KEY28")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) // control character 0x0c
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(RIGHT)) PORT_CODE(KEYCODE_RIGHT)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('z') PORT_CHAR('Z') PORT_CHAR(0x1a) PORT_CODE(KEYCODE_Z)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN) // control character 0xd9
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("KEY29")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) // non-printing character
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNKNOWN) // control character 0xbb
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(UP)) PORT_CODE(KEYCODE_UP)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNKNOWN) // control character 0xbb (CLEAR)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("KEY30")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) PORT_CHAR(UCHAR_MAMEKEY(DOWN)) PORT_CODE(KEYCODE_DOWN)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNKNOWN) // control character (CLR TAB)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("KEY31")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(HOME)) PORT_CODE(KEYCODE_RALT)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNKNOWN) // control character (PROT MODE)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
INPUT_PORTS_END
@ -632,7 +683,7 @@ static INPUT_PORTS_START( tv912c )
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("KEY16")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) // line feed
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Line Feed") PORT_CHAR(0x0a) PORT_CODE(KEYCODE_INSERT)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('i') PORT_CHAR('I') PORT_CODE(KEYCODE_I)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
@ -650,13 +701,13 @@ static INPUT_PORTS_START( tv912c )
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("KEY19")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) // control character 0x9a
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) // control character 0x9a (BREAK)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('[') PORT_CHAR(']') PORT_CHAR(0x1d) PORT_CODE(KEYCODE_CLOSEBRACE)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("KEY20")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) // (BLOCK CONV)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('l') PORT_CHAR('L') PORT_CODE(KEYCODE_L)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
@ -669,19 +720,19 @@ static INPUT_PORTS_START( tv912c )
PORT_START("KEY22")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('/') PORT_CHAR('?') PORT_CODE(KEYCODE_SLASH)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR(0x0d) PORT_CODE(KEYCODE_ENTER)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(ENTER_PAD)) PORT_CODE(KEYCODE_ENTER_PAD)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("KEY23")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR(' ') PORT_CODE(KEYCODE_SPACE)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNKNOWN) // enter?
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Return") PORT_CHAR(0x0d) PORT_CODE(KEYCODE_ENTER)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("KEY24")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('\\') PORT_CHAR('|') PORT_CHAR(0x1c) PORT_CODE(KEYCODE_BACKSLASH)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('-') PORT_CHAR('_') PORT_CODE(KEYCODE_MINUS)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('-') PORT_CHAR('_') PORT_CODE(KEYCODE_MINUS) PORT_CODE(KEYCODE_TAB_PAD)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
@ -711,28 +762,29 @@ static INPUT_PORTS_START( tv912c )
PORT_START("KEY29")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) // non-printing character
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNKNOWN) // control character 0xbb
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNKNOWN) // control character 0xbb (CLEAR)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("KEY30")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNKNOWN) // (DEL)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("KEY31")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(HOME)) PORT_CODE(KEYCODE_RALT)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('{') PORT_CHAR('}') PORT_CODE(KEYCODE_OPENBRACE)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN)
PORT_BIT(0xdc, IP_ACTIVE_LOW, IPT_UNUSED)
INPUT_PORTS_END
MACHINE_CONFIG_START(tv912_state::tv912)
MCFG_CPU_ADD("maincpu", I8035, XTAL_23_814MHz / 4)
MCFG_CPU_ADD("maincpu", I8035, XTAL_23_814MHz / 4) // nominally +6MHz, actually 5.9535 MHz
MCFG_CPU_PROGRAM_MAP(prog_map)
MCFG_CPU_IO_MAP(io_map)
MCFG_MCS48_PORT_P1_OUT_CB(WRITE8(tv912_state, p1_w))
MCFG_MCS48_PORT_P2_IN_CB(READ8(tv912_state, p2_r))
MCFG_MCS48_PORT_P2_OUT_CB(WRITE8(tv912_state, p2_w))
MCFG_MCS48_PORT_T0_IN_CB(DEVREADLINE("rs232", rs232_port_device, cts_r))
MCFG_MCS48_PORT_T1_IN_CB(DEVREADLINE("crtc", tms9927_device, bl_r)) MCFG_DEVCB_INVERT
@ -760,7 +812,7 @@ MACHINE_CONFIG_START(tv912_state::tv912)
MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, nullptr)
MCFG_SPEAKER_STANDARD_MONO("mono")
MCFG_SOUND_ADD("beep", BEEP, XTAL_23_814MHz / 7 / 11 / 256) // nominally 1200 Hz (same clock as for 75 baud setting)
MCFG_SOUND_ADD("beep", BEEP, XTAL_23_814MHz / 7 / 11 / 256) // nominally 1200 Hz
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
MACHINE_CONFIG_END