diff options
Diffstat (limited to 'src/devices/bus/vip/vp620.c')
-rw-r--r-- | src/devices/bus/vip/vp620.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/src/devices/bus/vip/vp620.c b/src/devices/bus/vip/vp620.c new file mode 100644 index 00000000000..42a00b37444 --- /dev/null +++ b/src/devices/bus/vip/vp620.c @@ -0,0 +1,103 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder +/********************************************************************** + + RCA VIP ASCII Keyboard Interface VP-620 emulation + +**********************************************************************/ + +#include "vp620.h" + + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +const device_type VP620 = &device_creator<vp620_device>; + + +//------------------------------------------------- +// ASCII_KEYBOARD_INTERFACE( kb_intf ) +//------------------------------------------------- + +WRITE8_MEMBER( vp620_device::kb_w ) +{ + m_keydata = data; + + m_slot->inst_w(0); + m_slot->inst_w(1); + + m_keystb = ASSERT_LINE; +} + +//------------------------------------------------- +// MACHINE_CONFIG_FRAGMENT( vp620 ) +//------------------------------------------------- + +static MACHINE_CONFIG_FRAGMENT( vp620 ) + MCFG_DEVICE_ADD("keyboard", GENERIC_KEYBOARD, 0) + MCFG_GENERIC_KEYBOARD_CB(WRITE8(vp620_device, kb_w)) +MACHINE_CONFIG_END + + +//------------------------------------------------- +// machine_config_additions - device-specific +// machine configurations +//------------------------------------------------- + +machine_config_constructor vp620_device::device_mconfig_additions() const +{ + return MACHINE_CONFIG_NAME( vp620 ); +} + + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// vp620_device - constructor +//------------------------------------------------- + +vp620_device::vp620_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, VP620, "VP620", tag, owner, clock, "vp620", __FILE__), + device_vip_byteio_port_interface(mconfig, *this), + m_keydata(0), + m_keystb(CLEAR_LINE) +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void vp620_device::device_start() +{ +} + + +//------------------------------------------------- +// vip_in_r - byte input read +//------------------------------------------------- + +UINT8 vp620_device::vip_in_r() +{ + return m_keydata; +} + + +//------------------------------------------------- +// vip_ef3_r - EF3 flag read +//------------------------------------------------- + +int vp620_device::vip_ef4_r() +{ + int state = m_keystb; + + m_keystb = CLEAR_LINE; + + return state; +} |