diff options
Diffstat (limited to 'src/devices/bus/vip/byteio.cpp')
-rw-r--r-- | src/devices/bus/vip/byteio.cpp | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/devices/bus/vip/byteio.cpp b/src/devices/bus/vip/byteio.cpp new file mode 100644 index 00000000000..bdebad76dba --- /dev/null +++ b/src/devices/bus/vip/byteio.cpp @@ -0,0 +1,88 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder +/********************************************************************** + + RCA Cosmac VIP Byte Input/Output port emulation + +**********************************************************************/ + +#include "byteio.h" + + + +//************************************************************************** +// GLOBAL VARIABLES +//************************************************************************** + +const device_type VIP_BYTEIO_PORT = &device_creator<vip_byteio_port_device>; + + + +//************************************************************************** +// CARD INTERFACE +//************************************************************************** + +//------------------------------------------------- +// device_vip_byteio_port_interface - constructor +//------------------------------------------------- + +device_vip_byteio_port_interface::device_vip_byteio_port_interface(const machine_config &mconfig, device_t &device) + : device_slot_card_interface(mconfig,device) +{ + m_slot = dynamic_cast<vip_byteio_port_device *>(device.owner()); +} + + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// vip_byteio_port_device - constructor +//------------------------------------------------- + +vip_byteio_port_device::vip_byteio_port_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, VIP_BYTEIO_PORT, "VIP byte I/O port", tag, owner, clock, "vip_byteio_port", __FILE__), + device_slot_interface(mconfig, *this), + m_write_inst(*this) +{ +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void vip_byteio_port_device::device_start() +{ + m_cart = dynamic_cast<device_vip_byteio_port_interface *>(get_card_device()); + + // resolve callbacks + m_write_inst.resolve_safe(); +} + + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void vip_byteio_port_device::device_reset() +{ +} + + +UINT8 vip_byteio_port_device::in_r() { UINT8 data = 0xff; if (m_cart != NULL) data = m_cart->vip_in_r(); return data; } +void vip_byteio_port_device::out_w(UINT8 data) { if (m_cart != NULL) m_cart->vip_out_w(data); } +READ_LINE_MEMBER( vip_byteio_port_device::ef3_r ) { int state = CLEAR_LINE; if (m_cart != NULL) state = m_cart->vip_ef3_r(); return state; } +READ_LINE_MEMBER( vip_byteio_port_device::ef4_r ) { int state = CLEAR_LINE; if (m_cart != NULL) state = m_cart->vip_ef4_r(); return state; } +WRITE_LINE_MEMBER( vip_byteio_port_device::q_w ) { if (m_cart != NULL) m_cart->vip_q_w(state); } + + +//------------------------------------------------- +// SLOT_INTERFACE( vip_byteio_cards ) +//------------------------------------------------- + +SLOT_INTERFACE_START( vip_byteio_cards ) + //SLOT_INTERFACE("exp2", VP576_BYTEIO) + SLOT_INTERFACE("ascii", VP620) +SLOT_INTERFACE_END |