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author Michael Zapf <github@mizapf.de>2020-04-06 13:36:13 +0200
committer Michael Zapf <github@mizapf.de>2020-04-06 13:39:34 +0200
commitc5b838bc2c15f509273470d9abc732023a2f705f (patch)
tree2c2b6558436129f25e6a3b68a9597d35716e6c6a
parentea677489db27f9eb1fcd758f68df16bf84cf3fec (diff)
Add octal registered transceiver 74543
-rw-r--r--scripts/src/machine.lua12
-rw-r--r--src/devices/machine/74543.cpp120
-rw-r--r--src/devices/machine/74543.h124
3 files changed, 256 insertions, 0 deletions
diff --git a/scripts/src/machine.lua b/scripts/src/machine.lua
index 4e7352c3e41..29cb6c48970 100644
--- a/scripts/src/machine.lua
+++ b/scripts/src/machine.lua
@@ -525,6 +525,18 @@ end
---------------------------------------------------
--
+--@src/devices/machine/74543.h,MACHINES["TTL74543"] = true
+---------------------------------------------------
+
+if (MACHINES["TTL74543"]~=null) then
+ files {
+ MAME_DIR .. "src/devices/machine/74543.cpp",
+ MAME_DIR .. "src/devices/machine/74543.h",
+ }
+end
+
+---------------------------------------------------
+--
--@src/devices/machine/7474.h,MACHINES["TTL7474"] = true
---------------------------------------------------
diff --git a/src/devices/machine/74543.cpp b/src/devices/machine/74543.cpp
new file mode 100644
index 00000000000..2abba597941
--- /dev/null
+++ b/src/devices/machine/74543.cpp
@@ -0,0 +1,120 @@
+// license:BSD-3-Clause
+// copyright-holders:Michael Zapf
+/*****************************************************************************
+
+ 74543: Octal Registered Transceiver
+ (typically 74F543)
+
+*****************************************************************************/
+
+#include "emu.h"
+#include "74543.h"
+
+DEFINE_DEVICE_TYPE(TTL74543, ttl74543_device, "ttl74543", "Octal Registered Transceiver")
+
+ttl74543_device::ttl74543_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : device_t(mconfig, TTL74543, tag, owner, clock),
+ m_output_a(*this),
+ m_output_b(*this),
+ m_ceabpre(false),
+ m_leabpre(false),
+ m_oeabpre(false),
+ m_cebapre(false),
+ m_lebapre(false),
+ m_oebapre(false)
+{
+}
+
+void ttl74543_device::device_start()
+{
+ save_item(NAME(m_ceab));
+ save_item(NAME(m_leab));
+ save_item(NAME(m_oeab));
+ save_item(NAME(m_ceba));
+ save_item(NAME(m_leba));
+ save_item(NAME(m_oeba));
+
+ save_item(NAME(m_latch));
+
+ m_output_a.resolve_safe();
+ m_output_b.resolve_safe();
+}
+
+void ttl74543_device::device_reset()
+{
+ m_ceab = m_ceabpre;
+ m_leab = m_leabpre;
+ m_oeab = m_oeabpre;
+ m_ceba = m_cebapre;
+ m_leba = m_lebapre;
+ m_oeba = m_oebapre;
+}
+
+/*
+ Data I/O control table:
+
+ Inputs Latch Output
+ CEAB* LEAB* OEAB* Status Buffers
+ -----------------------------------------
+ H X X Latched High Z A->B flow shown
+ X H X Latched - B->A flow control is the same
+ L L X Transparent - except using CEBA*, LEBA*, OEBA*
+ X X H - High Z
+ L X L - Driving
+
+ X = immaterial
+*/
+
+void ttl74543_device::a_w(uint8_t a)
+{
+ if (m_ceab && m_leab) m_latch = a;
+}
+
+void ttl74543_device::b_w(uint8_t b)
+{
+ if (m_ceba && m_leba) m_latch = b;
+}
+
+void ttl74543_device::outputb_rz(uint8_t& value)
+{
+ if (m_ceab && m_oeab) value = m_latch;
+}
+
+void ttl74543_device::outputa_rz(uint8_t& value)
+{
+ if (m_ceba && m_oeba) value = m_latch;
+}
+
+WRITE_LINE_MEMBER( ttl74543_device::ceab_w )
+{
+ m_ceab = (state == 0);
+ if (m_ceab && m_oeab) m_output_b(m_latch);
+}
+
+WRITE_LINE_MEMBER( ttl74543_device::leab_w )
+{
+ m_leab = (state == 0);
+}
+
+WRITE_LINE_MEMBER( ttl74543_device::oeab_w )
+{
+ m_oeab = (state == 0);
+ if (m_ceab && m_oeab) m_output_b(m_latch);
+}
+
+WRITE_LINE_MEMBER( ttl74543_device::ceba_w )
+{
+ m_ceba = (state == 0);
+ if (m_ceba && m_oeba) m_output_a(m_latch);
+}
+
+WRITE_LINE_MEMBER( ttl74543_device::leba_w )
+{
+ m_leba = (state == 0);
+}
+
+WRITE_LINE_MEMBER( ttl74543_device::oeba_w )
+{
+ m_oeba = (state == 0);
+ if (m_ceba && m_oeba) m_output_a(m_latch);
+}
diff --git a/src/devices/machine/74543.h b/src/devices/machine/74543.h
new file mode 100644
index 00000000000..ab2c7a561d2
--- /dev/null
+++ b/src/devices/machine/74543.h
@@ -0,0 +1,124 @@
+// license:BSD-3-Clause
+// copyright-holders:Michael Zapf
+/*****************************************************************************
+
+ 74543: Octal Registered Transceiver
+ (typically 74F543)
+
+***********************************************************************
+
+ Connection Diagram:
+ _________
+ LEBA* 1 | | | | 24 Vcc
+ OEBA* 2 | --- | 23 CEBA*
+ A0 3 | | 22 B0
+ A1 4 | | 21 B1
+ A2 5 | | 20 B2
+ A3 6 | | 19 B3
+ A4 7 | | 18 B4
+ A5 8 | | 17 B5
+ A6 9 | | 16 B6
+ A7 10 | | 15 B7
+ CEAB* 11 | | 14 LEAB*
+ GND 12 |_________| 13 OEAB*
+
+
+ Logic Symbol:
+ | |
+ ____|______|____
+ | |
+ | A0 ... A7 |
+ | |
+ --O| OEAB |
+ --O| OEBA |
+ --O| CEAB |
+ --O| CEBA |
+ --O| LEAB |
+ --O| LEBA |
+ | |
+ | B0 ... B7 |
+ |________________|
+ | |
+ | |
+
+
+***********************************************************************
+
+ Data I/O control table:
+
+ Inputs Latch Output
+ CEAB* LEAB* OEAB* Status Buffers
+ -----------------------------------------
+ H X X Latched High Z A->B flow shown
+ X H X Latched - B->A flow control is the same
+ L L X Transparent - except using CEBA*, LEBA*, OEBA*
+ X X H - High Z
+ L X L - Driving
+
+ X = immaterial
+**********************************************************************/
+
+#ifndef MAME_MACHINE_74543_H
+#define MAME_MACHINE_74543_H
+
+#pragma once
+
+class ttl74543_device : public device_t
+{
+public:
+ ttl74543_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0);
+ auto outputa_cb() { return m_output_a.bind(); }
+ auto outputb_cb() { return m_output_b.bind(); }
+
+ // public interfaces
+ DECLARE_WRITE_LINE_MEMBER(ceab_w);
+ DECLARE_WRITE_LINE_MEMBER(leab_w);
+ DECLARE_WRITE_LINE_MEMBER(oeab_w);
+ DECLARE_WRITE_LINE_MEMBER(ceba_w);
+ DECLARE_WRITE_LINE_MEMBER(leba_w);
+ DECLARE_WRITE_LINE_MEMBER(oeba_w);
+
+ void a_w(uint8_t a);
+ void b_w(uint8_t a);
+ void outputa_rz(uint8_t& value);
+ void outputb_rz(uint8_t& value);
+
+ // Preset values
+ // for lines tied to H or L
+ void set_ceab_pin_value(int value) { m_ceabpre = (value==0); }
+ void set_leab_pin_value(int value) { m_leabpre = (value==0); }
+ void set_oeab_pin_value(int value) { m_oeabpre = (value==0); }
+ void set_ceba_pin_value(int value) { m_cebapre = (value==0); }
+ void set_leba_pin_value(int value) { m_lebapre = (value==0); }
+ void set_oeba_pin_value(int value) { m_oebapre = (value==0); }
+
+protected:
+ // device-level overrides
+ void device_start() override;
+ void device_reset() override;
+
+private:
+ devcb_write8 m_output_a;
+ devcb_write8 m_output_b;
+
+ bool m_ceab;
+ bool m_leab;
+ bool m_oeab;
+ bool m_ceba;
+ bool m_leba;
+ bool m_oeba;
+
+ bool m_ceabpre;
+ bool m_leabpre;
+ bool m_oeabpre;
+ bool m_cebapre;
+ bool m_lebapre;
+ bool m_oebapre;
+
+ uint8_t m_latch;
+};
+
+// device type definition
+DECLARE_DEVICE_TYPE(TTL74543, ttl74543_device)
+
+#endif // MAME_MACHINE_74161_H