diff options
Diffstat (limited to 'src/devices/bus/a2gameio/joyport.cpp')
-rw-r--r-- | src/devices/bus/a2gameio/joyport.cpp | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/src/devices/bus/a2gameio/joyport.cpp b/src/devices/bus/a2gameio/joyport.cpp new file mode 100644 index 00000000000..987724adb91 --- /dev/null +++ b/src/devices/bus/a2gameio/joyport.cpp @@ -0,0 +1,106 @@ +// license:BSD-3-Clause +// copyright-holders:R. Belmont +/********************************************************************* + + Sirius JoyPort - connects 2 digital joysticks to Apple II and II Plus + + This doesn't work on the IIe or IIgs because the buttons are + active low, meaning those systems always go into self-test if a + JoyPort is connected. Also, the annunciator useage could clash + with double-hi-res on those systems. + + IIc and IIc Plus are out because they don't have annunciator outputs. + +*********************************************************************/ + +#include "emu.h" +#include "bus/a2gameio/joyport.h" + +//************************************************************************** +// GLOBAL VARIABLES +//************************************************************************** + +// device type definition +DEFINE_DEVICE_TYPE(APPLE2_JOYPORT, apple2_joyport_device, "a2joyprt", "Sirius JoyPort") + +//************************************************************************** +// PARAMETERS +//************************************************************************** + +#define JOYSTICK_DELTA 80 +#define JOYSTICK_SENSITIVITY 50 +#define JOYSTICK_AUTOCENTER 80 + +//************************************************************************** +// INPUT PORTS +//************************************************************************** + +static INPUT_PORTS_START( apple2_joyport ) + PORT_START("joystick_p1") + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) + PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) + PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) + PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) + + PORT_START("joystick_p2") + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(2) + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(2) + PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_PLAYER(2) + PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(2) + PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2) +INPUT_PORTS_END + +//************************************************************************** +// DEVICE IMPLEMENTATION +//************************************************************************** + +apple2_joyport_device::apple2_joyport_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) + : device_t(mconfig, APPLE2_JOYPORT, tag, owner, clock) + , device_a2gameio_interface(mconfig, *this) + , m_player1(*this, "joystick_p1") + , m_player2(*this, "joystick_p2") +{ +} + +ioport_constructor apple2_joyport_device::device_input_ports() const +{ + return INPUT_PORTS_NAME(apple2_joyport); +} + +void apple2_joyport_device::device_start() +{ + save_item(NAME(m_an0)); + save_item(NAME(m_an1)); +} + +READ_LINE_MEMBER(apple2_joyport_device::sw0_r) +{ + u8 port_read = m_an1 ? m_player2->read() : m_player1->read(); + + return BIT(port_read, 4); +} + +READ_LINE_MEMBER(apple2_joyport_device::sw1_r) +{ + u8 port_read = m_an1 ? m_player2->read() : m_player1->read(); + + return m_an1 ? BIT(port_read, 0) : BIT(port_read, 3); +} + +READ_LINE_MEMBER(apple2_joyport_device::sw2_r) +{ + u8 port_read = m_an1 ? m_player2->read() : m_player1->read(); + + return m_an1 ? BIT(port_read, 2) : BIT(port_read, 1); +} + +WRITE_LINE_MEMBER(apple2_joyport_device::an0_w) +{ + m_an0 = state; +} + +WRITE_LINE_MEMBER(apple2_joyport_device::an1_w) +{ + m_an1 = state; +} |