diff options
Diffstat (limited to 'src/mame/machine/itt1700_kbd.cpp')
-rw-r--r-- | src/mame/machine/itt1700_kbd.cpp | 282 |
1 files changed, 282 insertions, 0 deletions
diff --git a/src/mame/machine/itt1700_kbd.cpp b/src/mame/machine/itt1700_kbd.cpp new file mode 100644 index 00000000000..23cbe0dd94b --- /dev/null +++ b/src/mame/machine/itt1700_kbd.cpp @@ -0,0 +1,282 @@ +// license:BSD-3-Clause +// copyright-holders:AJR +/*********************************************************************************************************************************** + +Preliminary ITT 1700 keyboard emulation. + +***********************************************************************************************************************************/ + +#include "emu.h" +#include "machine/itt1700_kbd.h" + +//************************************************************************** +// GLOBAL VARIABLES +//************************************************************************** + +DEFINE_DEVICE_TYPE(ITT1700_KEYBOARD, itt1700_keyboard_device, "itt1700_kbd", "ITT 1700 keyboard") + +//************************************************************************** +// DEVICE DEFINITION +//************************************************************************** + +//------------------------------------------------- +// itt1700_keyboard_device - constructor +//------------------------------------------------- + +itt1700_keyboard_device::itt1700_keyboard_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) + : device_t(mconfig, ITT1700_KEYBOARD, tag, owner, clock) + , m_clock_state(true) + , m_line1_state(true) + , m_line2_state(true) + , m_scan_counter(0) + , m_keys(*this, "KEY%u", 0U) +{ +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void itt1700_keyboard_device::device_start() +{ + save_item(NAME(m_clock_state)); + save_item(NAME(m_line1_state)); + save_item(NAME(m_line2_state)); + save_item(NAME(m_scan_counter)); +} + +//------------------------------------------------- +// line1_w - write from host to control line 1 +//------------------------------------------------- + +WRITE_LINE_MEMBER(itt1700_keyboard_device::line1_w) +{ + m_line1_state = state; +} + +//------------------------------------------------- +// line2_w - write from host to control line 2 +//------------------------------------------------- + +WRITE_LINE_MEMBER(itt1700_keyboard_device::line2_w) +{ + m_line2_state = state; +} + +//------------------------------------------------- +// clock_w - write clock pulse from host +//------------------------------------------------- + +WRITE_LINE_MEMBER(itt1700_keyboard_device::clock_w) +{ + if (state && !m_clock) + { + // TODO: what happens when both lines are on? + if (m_line1_state) + m_scan_counter = 0x7d; + else if (m_line2_state) + m_scan_counter = (m_scan_counter + 1) & 0x7f; + } + + m_clock = state; +} + +//------------------------------------------------- +// sense_r - poll return line +//------------------------------------------------- + +READ_LINE_MEMBER(itt1700_keyboard_device::sense_r) +{ + return !BIT(m_keys[m_scan_counter >> 3]->read(), m_scan_counter & 7); +} + +//************************************************************************** +// KEY INPUT MATRIX +//************************************************************************** + +static INPUT_PORTS_START(itt1700_kbd) + PORT_START("KEY0") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNKNOWN) + + PORT_START("KEY1") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNKNOWN) + + PORT_START("KEY2") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNKNOWN) + + PORT_START("KEY3") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNKNOWN) + + PORT_START("KEY4") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNKNOWN) + + PORT_START("KEY5") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNKNOWN) + + PORT_START("KEY6") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNKNOWN) + + PORT_START("KEY7") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNKNOWN) + + PORT_START("KEY8") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNKNOWN) + + PORT_START("KEY9") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNKNOWN) + + PORT_START("KEY10") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNKNOWN) + + PORT_START("KEY11") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNKNOWN) + + PORT_START("KEY12") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNKNOWN) + + PORT_START("KEY13") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNKNOWN) + + PORT_START("KEY14") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNKNOWN) + + PORT_START("KEY15") + PORT_DIPNAME(0x01, 0x01, DEF_STR(Unknown)) + PORT_DIPSETTING(0x01, DEF_STR(Off)) + PORT_DIPSETTING(0x00, DEF_STR(On)) + PORT_DIPNAME(0x02, 0x02, DEF_STR(Unknown)) + PORT_DIPSETTING(0x02, DEF_STR(Off)) + PORT_DIPSETTING(0x00, DEF_STR(On)) + PORT_DIPNAME(0x04, 0x04, DEF_STR(Unknown)) + PORT_DIPSETTING(0x04, DEF_STR(Off)) + PORT_DIPSETTING(0x00, DEF_STR(On)) + PORT_DIPNAME(0x08, 0x08, DEF_STR(Unknown)) + PORT_DIPSETTING(0x08, DEF_STR(Off)) + PORT_DIPSETTING(0x00, DEF_STR(On)) + PORT_DIPNAME(0x10, 0x10, DEF_STR(Unknown)) + PORT_DIPSETTING(0x10, DEF_STR(Off)) + PORT_DIPSETTING(0x00, DEF_STR(On)) + PORT_DIPNAME(0x20, 0x20, DEF_STR(Unknown)) + PORT_DIPSETTING(0x20, DEF_STR(Off)) + PORT_DIPSETTING(0x00, DEF_STR(On)) + PORT_DIPNAME(0x40, 0x40, DEF_STR(Unknown)) + PORT_DIPSETTING(0x40, DEF_STR(Off)) + PORT_DIPSETTING(0x00, DEF_STR(On)) + PORT_DIPNAME(0x80, 0x80, DEF_STR(Unknown)) + PORT_DIPSETTING(0x80, DEF_STR(Off)) + PORT_DIPSETTING(0x00, DEF_STR(On)) +INPUT_PORTS_END + +//------------------------------------------------- +// input_ports - device-specific input ports +//------------------------------------------------- + +ioport_constructor itt1700_keyboard_device::device_input_ports() const +{ + return INPUT_PORTS_NAME(itt1700_kbd); +} |