diff options
author | 2019-03-25 23:13:40 +0100 | |
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committer | 2019-03-25 23:13:40 +0100 | |
commit | b380514764cf857469bae61c11143a19f79a74c5 (patch) | |
tree | 63c8012e262618f08a332da31dd714281aa2c5ed /src/devices/video/mm5445.cpp | |
parent | c24473ddff715ecec2e258a6eb38960cf8c8e98e (diff) |
Revert "conflict resolution (nw)"
This reverts commit c24473ddff715ecec2e258a6eb38960cf8c8e98e, reversing
changes made to 009cba4fb8102102168ef32870892438327f3705.
Diffstat (limited to 'src/devices/video/mm5445.cpp')
-rw-r--r-- | src/devices/video/mm5445.cpp | 106 |
1 files changed, 0 insertions, 106 deletions
diff --git a/src/devices/video/mm5445.cpp b/src/devices/video/mm5445.cpp deleted file mode 100644 index 6b857ed19b3..00000000000 --- a/src/devices/video/mm5445.cpp +++ /dev/null @@ -1,106 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:hap -/* - - National Semiconductor MM5445 series VFD Driver - - TODO: - - brightness control input pin (sets output voltage level) - -*/ - -#include "emu.h" -#include "video/mm5445.h" - - -DEFINE_DEVICE_TYPE(MM5445, mm5445_device, "mm5445", "MM5445 VFD Driver") -DEFINE_DEVICE_TYPE(MM5446, mm5446_device, "mm5446", "MM5446 VFD Driver") -DEFINE_DEVICE_TYPE(MM5447, mm5447_device, "mm5447", "MM5447 VFD Driver") -DEFINE_DEVICE_TYPE(MM5448, mm5448_device, "mm5448", "MM5448 VFD Driver") - -//------------------------------------------------- -// constructor -//------------------------------------------------- - -mm5445_device::mm5445_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock, u8 outpins) : - device_t(mconfig, type, tag, owner, clock), - m_outmask((u64(1) << outpins) - 1), - m_write_output(*this) -{ } - -mm5445_device::mm5445_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : - mm5445_device(mconfig, MM5445, tag, owner, clock, 33) -{ } - -mm5446_device::mm5446_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : - mm5445_device(mconfig, MM5446, tag, owner, clock, 34) -{ } - -mm5447_device::mm5447_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : - mm5445_device(mconfig, MM5447, tag, owner, clock, 34) -{ } - -mm5448_device::mm5448_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : - mm5445_device(mconfig, MM5448, tag, owner, clock, 35) -{ } - - -//------------------------------------------------- -// device_start - device-specific startup -//------------------------------------------------- - -void mm5445_device::device_start() -{ - // resolve callbacks - m_write_output.resolve_safe(); - - // zerofill - m_clk = 0; - m_enable = 0; - m_data = 0; - m_shiftreg = 0; - m_shiftcount = 0; - - // register for savestates - save_item(NAME(m_clk)); - save_item(NAME(m_enable)); - save_item(NAME(m_data)); - save_item(NAME(m_shiftreg)); - save_item(NAME(m_shiftcount)); -} - - -//------------------------------------------------- -// handlers -//------------------------------------------------- - -WRITE_LINE_MEMBER(mm5445_device::clock_w) -{ - state = (state) ? 1 : 0; - bool rise = state && !m_clk; - m_clk = state; - - // clock on rising edge - if (rise) - { - u64 data_in = u64(m_data & ~m_enable) << 34; - u64 lead_in = ~m_shiftreg & data_in; - m_shiftreg = (m_shiftreg & ((u64(1) << 34) - 1)) | data_in; - - // leading 1 triggers shift start - if (m_shiftcount == 0 && !lead_in) - return; - - // output on 35th clock - if (m_shiftcount == 35) - { - m_shiftcount = 0; - m_write_output(0, m_shiftreg & m_outmask, ~u64(0)); - } - else - { - m_shiftreg >>= 1; - m_shiftcount++; - } - } -} |