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author Patrick Mackinlay <pmackinlay@hotmail.com>2019-02-20 13:25:12 +0700
committer Patrick Mackinlay <pmackinlay@hotmail.com>2019-02-20 13:25:12 +0700
commit455195eecf8bf0ec1ea266b79fc216d53ebc6170 (patch)
tree6515392cfed121f4363bfed71b71663ee200cc94 /src/devices
parentb84397f786f177bc0e215a9d76f2454045ac71fa (diff)
xc1700e: new device
Diffstat (limited to 'src/devices')
-rw-r--r--src/devices/machine/xc1700e.cpp83
-rw-r--r--src/devices/machine/xc1700e.h117
2 files changed, 200 insertions, 0 deletions
diff --git a/src/devices/machine/xc1700e.cpp b/src/devices/machine/xc1700e.cpp
new file mode 100644
index 00000000000..6d82555437d
--- /dev/null
+++ b/src/devices/machine/xc1700e.cpp
@@ -0,0 +1,83 @@
+// license:BSD-3-Clause
+// copyright-holders:Patrick Mackinlay
+
+/*
+ * An implementation of the Xilinx XC1700E family of serial configuration PROM
+ * devices, including:
+ *
+ * Part Capacity Variants
+ * -------- --------- ----------------
+ * XC1736E 36,288
+ * XC1765E 65,536 XC1765EL
+ * XC17128E 131,072 XC17128EL
+ * XC17256E 262,144 XC17256EL
+ * XC17512L 524,288
+ * XC1701 1,048,576 XC1701L, XQ1701L
+ * XC1702L 2,097,152
+ * XC1704L 4,194,304
+ *
+ * The input C̅E̅ and CLK lines have not been explicitly implemented; these are
+ * assumed to be asserted as expected before/during data read. Similarly, the
+ * RESET/O̅E̅ or OE/R̅E̅S̅E̅T̅ is implicitly handled by device_reset(). The effect of
+ * C̅E̅O̅ can be obtained by connecting the cascade_r callback to the data_r of
+ * the cascaded device and resetting all devices when needed.
+ *
+ * This implementation assumes the input data is stored least-significant bit
+ * first; i.e. the first bit read out of the device is held in the LSB of the
+ * first byte of the memory region. This convention matches at least one
+ * dumping device tested.
+ *
+ * Sources:
+ *
+ * http://www.xilinx.com/support/documentation/data_sheets/ds027.pdf
+ *
+ */
+
+#include "emu.h"
+#include "xc1700e.h"
+
+#define VERBOSE 0
+#include "logmacro.h"
+
+DEFINE_DEVICE_TYPE(XC1736E, xc1736e_device, "xc1736e", "Xilinx 36,288 bit Serial PROM")
+DEFINE_DEVICE_TYPE(XC1765E, xc1765e_device, "xc1765e", "Xilinx 65,536 bit Serial PROM")
+DEFINE_DEVICE_TYPE(XC17128E, xc17128e_device, "xc17128e", "Xilinx 131,072 bit Serial PROM")
+DEFINE_DEVICE_TYPE(XC17256E, xc17256e_device, "xc17256e", "Xilinx 262,144 bit Serial PROM")
+DEFINE_DEVICE_TYPE(XC17512L, xc17512l_device, "xc17512l", "Xilinx 524,288 bit Serial PROM")
+DEFINE_DEVICE_TYPE(XC1701, xc1701_device, "xc1701", "Xilinx 1,048,576 bit Serial PROM")
+DEFINE_DEVICE_TYPE(XC1702L, xc1702l_device, "xc1702l", "Xilinx 2,097,152 bit Serial PROM")
+DEFINE_DEVICE_TYPE(XC1704L, xc1704l_device, "xc1704l", "Xilinx 4,194,304 bit Serial PROM")
+
+base_xc1700e_device::base_xc1700e_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock, u32 capacity)
+ : device_t(mconfig, type, tag, owner, clock)
+ , m_capacity(capacity)
+ , m_region(*this, DEVICE_SELF)
+ , m_cascade_cb(*this)
+{
+}
+
+void base_xc1700e_device::device_start()
+{
+ m_cascade_cb.resolve_safe(1);
+
+ save_item(NAME(m_address));
+}
+
+void base_xc1700e_device::device_reset()
+{
+ m_address = 0;
+}
+
+int base_xc1700e_device::data_r()
+{
+ if (m_address < m_capacity)
+ {
+ int const data = BIT(m_region->as_u8(m_address >> 3), m_address & 7);
+
+ m_address++;
+
+ return data;
+ }
+ else
+ return m_cascade_cb();
+}
diff --git a/src/devices/machine/xc1700e.h b/src/devices/machine/xc1700e.h
new file mode 100644
index 00000000000..f455b733d2d
--- /dev/null
+++ b/src/devices/machine/xc1700e.h
@@ -0,0 +1,117 @@
+// license:BSD-3-Clause
+// copyright-holders:Patrick Mackinlay
+
+#ifndef MAME_MACHINE_XC1700E_H
+#define MAME_MACHINE_XC1700E_H
+
+#pragma once
+
+class base_xc1700e_device : public device_t
+{
+public:
+ // configuration
+ auto cascade_r() { return m_cascade_cb.bind(); }
+
+ // output line
+ int data_r();
+
+protected:
+ base_xc1700e_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock, u32 capacity);
+
+ // device_t overrides
+ virtual void device_start() override;
+ virtual void device_reset() override;
+
+private:
+ // device configuration
+ const u32 m_capacity;
+ required_memory_region m_region;
+
+ devcb_read_line m_cascade_cb;
+
+ // device state
+ unsigned m_address;
+};
+
+DECLARE_DEVICE_TYPE(XC1736E, xc1736e_device)
+DECLARE_DEVICE_TYPE(XC1765E, xc1765e_device)
+DECLARE_DEVICE_TYPE(XC17128E, xc17128e_device)
+DECLARE_DEVICE_TYPE(XC17256E, xc17256e_device)
+DECLARE_DEVICE_TYPE(XC17512L, xc17512l_device)
+DECLARE_DEVICE_TYPE(XC1701, xc1701_device)
+DECLARE_DEVICE_TYPE(XC1702L, xc1702l_device)
+DECLARE_DEVICE_TYPE(XC1704L, xc1704l_device)
+
+class xc1736e_device : public base_xc1700e_device
+{
+public:
+ xc1736e_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0)
+ : base_xc1700e_device(mconfig, XC1736E, tag, owner, clock, 36'288UL)
+ {
+ }
+};
+
+class xc1765e_device : public base_xc1700e_device
+{
+public:
+ xc1765e_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0)
+ : base_xc1700e_device(mconfig, XC1765E, tag, owner, clock, 65'536UL)
+ {
+ }
+};
+
+class xc17128e_device : public base_xc1700e_device
+{
+public:
+ xc17128e_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0)
+ : base_xc1700e_device(mconfig, XC17128E, tag, owner, clock, 131'072UL)
+ {
+ }
+};
+
+class xc17256e_device : public base_xc1700e_device
+{
+public:
+ xc17256e_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0)
+ : base_xc1700e_device(mconfig, XC17256E, tag, owner, clock, 262'144UL)
+ {
+ }
+};
+
+class xc17512l_device : public base_xc1700e_device
+{
+public:
+ xc17512l_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0)
+ : base_xc1700e_device(mconfig, XC17512L, tag, owner, clock, 524'288UL)
+ {
+ }
+};
+
+class xc1701_device : public base_xc1700e_device
+{
+public:
+ xc1701_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0)
+ : base_xc1700e_device(mconfig, XC1701, tag, owner, clock, 1'048'576UL)
+ {
+ }
+};
+
+class xc1702l_device : public base_xc1700e_device
+{
+public:
+ xc1702l_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0)
+ : base_xc1700e_device(mconfig, XC1702L, tag, owner, clock, 2'097'152UL)
+ {
+ }
+};
+
+class xc1704l_device : public base_xc1700e_device
+{
+public:
+ xc1704l_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0)
+ : base_xc1700e_device(mconfig, XC1704L, tag, owner, clock, 4'194'304UL)
+ {
+ }
+};
+
+#endif // MAME_MACHINE_XC1700E_H