diff options
Diffstat (limited to 'src/emu/bus/compucolor/floppy.c')
-rw-r--r-- | src/emu/bus/compucolor/floppy.c | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/src/emu/bus/compucolor/floppy.c b/src/emu/bus/compucolor/floppy.c new file mode 100644 index 00000000000..62d8d2437b8 --- /dev/null +++ b/src/emu/bus/compucolor/floppy.c @@ -0,0 +1,255 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder +/********************************************************************** + + Compucolor Floppy Disk Drive emulation + + Copyright MESS Team. + Visit http://mamedev.org for licensing and usage restrictions. + +*********************************************************************/ + +#include "floppy.h" + + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +const device_type COMPUCOLOR_FLOPPY_PORT = &device_creator<compucolor_floppy_port_device>; +const device_type COMPUCOLOR_FLOPPY = &device_creator<compucolor_floppy_device>; + + +//------------------------------------------------- +// SLOT_INTERFACE( compucolor_floppy_port_devices ) +//------------------------------------------------- + +SLOT_INTERFACE_START( compucolor_floppy_port_devices ) + SLOT_INTERFACE("floppy", COMPUCOLOR_FLOPPY) +SLOT_INTERFACE_END + + +//------------------------------------------------- +// FLOPPY_FORMATS( floppy_formats ) +//------------------------------------------------- + +FLOPPY_FORMATS_MEMBER( compucolor_floppy_device::floppy_formats ) + FLOPPY_CCVF_FORMAT +FLOPPY_FORMATS_END + + +//------------------------------------------------- +// SLOT_INTERFACE( compucolor_floppies ) +//------------------------------------------------- + +static SLOT_INTERFACE_START( compucolor_floppies ) + SLOT_INTERFACE_INTERNAL( "525sssd", FLOPPY_525_SSSD ) +SLOT_INTERFACE_END + + +//------------------------------------------------- +// MACHINE_DRIVER( compucolor_floppy ) +//------------------------------------------------- + +static MACHINE_CONFIG_FRAGMENT( compucolor_floppy ) + MCFG_FLOPPY_DRIVE_ADD("floppy", compucolor_floppies, "525sssd", compucolor_floppy_device::floppy_formats) +MACHINE_CONFIG_END + + +//------------------------------------------------- +// machine_config_additions - device-specific +// machine configurations +//------------------------------------------------- + +machine_config_constructor compucolor_floppy_device::device_mconfig_additions() const +{ + return MACHINE_CONFIG_NAME( compucolor_floppy ); +} + + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// device_compucolor_floppy_port_interface - constructor +//------------------------------------------------- + +device_compucolor_floppy_port_interface::device_compucolor_floppy_port_interface(const machine_config &mconfig, device_t &device) + : device_rs232_port_interface(mconfig, device) +{ +} + + +//------------------------------------------------- +// compucolor_floppy_port_device - constructor +//------------------------------------------------- + +compucolor_floppy_port_device::compucolor_floppy_port_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) + : rs232_port_device(mconfig, COMPUCOLOR_FLOPPY_PORT, "Compucolor Floppy Port", tag, owner, clock, "compclr_flp_port", __FILE__) +{ +} + + +//------------------------------------------------- +// compucolor_floppy_device - constructor +//------------------------------------------------- + +compucolor_floppy_device::compucolor_floppy_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) + : device_t(mconfig, COMPUCOLOR_FLOPPY, "Compucolor floppy", tag, owner, clock, "compclr_flp", __FILE__), + device_compucolor_floppy_port_interface(mconfig, *this), + m_floppy(*this, "floppy:525sssd"), + m_rw(1), + m_stp(0), + m_sel(1), + m_period(attotime::from_hz(9600*8)) +{ + m_owner = dynamic_cast<compucolor_floppy_port_device *>(this->owner()); +} + + +//------------------------------------------------- +// device_config_complete - +//------------------------------------------------- + +void compucolor_floppy_port_device::device_config_complete() +{ + rs232_port_device::device_config_complete(); + + m_dev = dynamic_cast<device_compucolor_floppy_port_interface *>(get_card_device()); +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void compucolor_floppy_port_device::device_start() +{ + rs232_port_device::device_start(); +} + + +void compucolor_floppy_device::device_start() +{ + // allocate timer + m_timer = timer_alloc(); + m_timer->adjust(attotime::from_hz(9600*8), 0, attotime::from_hz(9600*8)); + + // state saving + save_item(NAME(m_rw)); + save_item(NAME(m_stp)); + save_item(NAME(m_sel)); +} + + +//------------------------------------------------- +// device_timer - handle timer events +//------------------------------------------------- + +void compucolor_floppy_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) +{ + if (!m_sel && !m_rw) + { + output_rxd(read_bit()); + } +} + + +//------------------------------------------------- +// tx_w - +//------------------------------------------------- + +void compucolor_floppy_device::tx(UINT8 state) +{ + if (!m_sel && m_rw) + { + write_bit(state); + } +} + + +//------------------------------------------------- +// rw_w - +//------------------------------------------------- + +void compucolor_floppy_device::rw_w(int state) +{ + if (!m_rw && state) + { + output_rxd(1); + } + + m_rw = state; +} + + +//------------------------------------------------- +// stepper_w - +//------------------------------------------------- + +void compucolor_floppy_device::stepper_w(UINT8 data) +{ + if (!m_sel) + { + if ((m_stp == 1 && data == 4) || (m_stp == 2 && data == 1) || (m_stp == 4 && data == 2)) + { + // step in + m_floppy->dir_w(1); + m_floppy->stp_w(0); + m_floppy->stp_w(1); + } + else if ((m_stp == 1 && data == 2) || (m_stp == 2 && data == 4) || (m_stp == 4 && data == 1)) + { + // step out + m_floppy->dir_w(0); + m_floppy->stp_w(0); + m_floppy->stp_w(1); + } + } + + m_stp = data; +} + + +//------------------------------------------------- +// select_w - +//------------------------------------------------- + +void compucolor_floppy_device::select_w(int state) +{ + m_floppy->mon_w(state); + + if (!m_sel && state) + { + output_rxd(1); + } + + m_sel = state; +} + + +//------------------------------------------------- +// read_bit - +//------------------------------------------------- + +bool compucolor_floppy_device::read_bit() +{ + attotime when = machine().time(); + attotime edge = m_floppy->get_next_transition(when); + attotime next = when + m_period; + + return (edge.is_never() || edge >= next) ? 0 : 1; +} + + +//------------------------------------------------- +// write_bit - +//------------------------------------------------- + +void compucolor_floppy_device::write_bit(bool bit) +{ + // TODO +} |