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Diffstat (limited to 'src/devices/bus/c64/bn1541.cpp')
-rw-r--r-- | src/devices/bus/c64/bn1541.cpp | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/src/devices/bus/c64/bn1541.cpp b/src/devices/bus/c64/bn1541.cpp new file mode 100644 index 00000000000..41e37f17fdd --- /dev/null +++ b/src/devices/bus/c64/bn1541.cpp @@ -0,0 +1,154 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder, smf +/********************************************************************** + + SpeedDOS / Burst Nibbler 1541/1571 Parallel Cable emulation + + http://sta.c64.org/cbmparc2.html + +**********************************************************************/ + +#include "bn1541.h" + + + +//************************************************************************** +// MACROS / CONSTANTS +//************************************************************************** + +#define LOG 0 + + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +const device_type C64_BN1541 = &device_creator<c64_bn1541_device>; + + + +//************************************************************************** +// FLOPPY DRIVE INTERFACE +//************************************************************************** + +//------------------------------------------------- +// device_c64_floppy_parallel_interface - constructor +//------------------------------------------------- + +device_c64_floppy_parallel_interface::device_c64_floppy_parallel_interface(const machine_config &mconfig, device_t &device) : + m_other(NULL) +{ +} + + +//------------------------------------------------- +// ~device_c64_floppy_parallel_interface - destructor +//------------------------------------------------- + +device_c64_floppy_parallel_interface::~device_c64_floppy_parallel_interface() +{ +} + + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// c64_bn1541_device - constructor +//------------------------------------------------- + +c64_bn1541_device::c64_bn1541_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, C64_BN1541, "C64 Burst Nibbler 1541/1571 Parallel Cable", tag, owner, clock, "c64_bn1541", __FILE__), + device_pet_user_port_interface(mconfig, *this), + device_c64_floppy_parallel_interface(mconfig, *this) +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void c64_bn1541_device::device_start() +{ + device_iterator iter(machine().root_device()); + + for (device_t *device = iter.first(); device != NULL; device = iter.next()) + { + device_iterator subiter(*device); + + for (device_t *subdevice = subiter.first(); subdevice != NULL; subdevice = iter.next()) + { + if (subdevice->interface(m_other) && subdevice != this) + { + if (LOG) logerror("Parallel device %s\n", subdevice->tag()); + + // grab the first 1541/1571 and run to the hills + m_other->m_other = this; + return; + } + } + } +} + + +//------------------------------------------------- +// parallel_data_w - +//------------------------------------------------- + +void c64_bn1541_device::parallel_data_w(UINT8 data) +{ + if (LOG) logerror("1541 parallel data %02x\n", data); + + output_c((data>>0)&1); + output_d((data>>1)&1); + output_e((data>>2)&1); + output_f((data>>3)&1); + output_h((data>>4)&1); + output_j((data>>5)&1); + output_k((data>>6)&1); + output_l((data>>7)&1); +} + + +//------------------------------------------------- +// parallel_strobe_w - +//------------------------------------------------- + +void c64_bn1541_device::parallel_strobe_w(int state) +{ + if (LOG) logerror("1541 parallel strobe %u\n", state); + + output_b(state); +} + + +//------------------------------------------------- +// update_output +//------------------------------------------------- + +void c64_bn1541_device::update_output() +{ + if (m_other != NULL) + { + m_other->parallel_data_w(m_parallel_output); + } +} + + +//------------------------------------------------- +// input_8 - CIA2 PC write +//------------------------------------------------- + +WRITE_LINE_MEMBER(c64_bn1541_device::input_8) +{ + if (LOG) logerror("C64 parallel strobe %u\n", state); + + if (m_other != NULL) + { + m_other->parallel_strobe_w(state); + } +} |