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Diffstat (limited to 'src/devices/bus/intellec4/prommemory.cpp')
-rw-r--r--src/devices/bus/intellec4/prommemory.cpp67
1 files changed, 67 insertions, 0 deletions
diff --git a/src/devices/bus/intellec4/prommemory.cpp b/src/devices/bus/intellec4/prommemory.cpp
new file mode 100644
index 00000000000..d3d1629ca1f
--- /dev/null
+++ b/src/devices/bus/intellec4/prommemory.cpp
@@ -0,0 +1,67 @@
+// license:BSD-3-Clause
+// copyright-holders:Vas Crabb
+
+#include "emu.h"
+#include "prommemory.h"
+
+
+DEFINE_DEVICE_TYPE_NS(INTELLEC4_PROM_MEMORY, bus::intellec4, imm6_26_device, "intlc4_imm6_26", "Intel imm6-26 PROM Memory Module")
+
+
+namespace bus { namespace intellec4 {
+
+imm6_26_device::imm6_26_device(machine_config const &mconfig, char const *tag, device_t *owner, u32 clock)
+ : device_t(mconfig, INTELLEC4_PROM_MEMORY, tag, owner, clock)
+ , device_univ_card_interface(mconfig, *this)
+ , device_image_interface(mconfig, *this)
+ , m_data()
+{
+}
+
+
+image_init_result imm6_26_device::call_load()
+{
+ if ((length() > 4096U) || (length() % 256U))
+ return image_init_result::FAIL;
+
+ unmap();
+ allocate();
+ if (fread(m_data.get(), length()) != length())
+ return image_init_result::FAIL;
+
+ // FIXME: gimme a cookie!
+ rom_space().install_rom(0x1000U, offs_t(0x1000U + length()), m_data.get());
+
+ return image_init_result::PASS;
+}
+
+void imm6_26_device::call_unload()
+{
+ unmap();
+}
+
+
+void imm6_26_device::device_start()
+{
+ allocate();
+
+ save_pointer(NAME(m_data.get()), 4096U);
+}
+
+
+void imm6_26_device::allocate()
+{
+ if (!m_data)
+ {
+ m_data = std::make_unique<u8 []>(4096U);
+ std::fill(m_data.get(), m_data.get() + 4096U, 0U);
+ }
+}
+
+void imm6_26_device::unmap()
+{
+ // FIXME: where's my magic cookie?
+ rom_space().unmap_read(0x1000U, 0x1fffU);
+}
+
+} } // namespace bus::intellec4