summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/machine/pgm2_memcard.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/mame/machine/pgm2_memcard.cpp')
-rw-r--r--src/mame/machine/pgm2_memcard.cpp149
1 files changed, 149 insertions, 0 deletions
diff --git a/src/mame/machine/pgm2_memcard.cpp b/src/mame/machine/pgm2_memcard.cpp
new file mode 100644
index 00000000000..e8fee19f474
--- /dev/null
+++ b/src/mame/machine/pgm2_memcard.cpp
@@ -0,0 +1,149 @@
+// license:BSD-3-Clause
+// copyright-holders:David Haywood, Miodrag Milanovic
+/*********************************************************************
+
+ pgm2_memcard.cpp
+
+ PGM2 Memory card functions.
+ Presumable Siemens SLE 4442 or compatible.
+
+*********************************************************************/
+
+#include "emu.h"
+#include "emuopts.h"
+
+#include "pgm2_memcard.h"
+
+
+// device type definition
+DEFINE_DEVICE_TYPE(PGM2_MEMCARD, pgm2_memcard_device, "pgm2_memcard", "PGM2 Memory Card")
+
+//-------------------------------------------------
+// pgm2_memcard_device - constructor
+//-------------------------------------------------
+
+pgm2_memcard_device::pgm2_memcard_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : device_t(mconfig, PGM2_MEMCARD, tag, owner, clock)
+ , device_image_interface(mconfig, *this)
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void pgm2_memcard_device::device_start()
+{
+ save_item(NAME(m_memcard_data));
+}
+
+/*-------------------------------------------------
+ memcard_insert - insert an existing memory card
+ with the given index
+-------------------------------------------------*/
+
+image_init_result pgm2_memcard_device::call_load()
+{
+ authenticated = false;
+ if(length() != 0x108)
+ return image_init_result::FAIL;
+
+ fseek(0, SEEK_SET);
+ size_t ret = fread(m_memcard_data, 0x100);
+ if(ret != 0x100)
+ return image_init_result::FAIL;
+ ret = fread(m_protection_data, 4);
+ if (ret != 4)
+ return image_init_result::FAIL;
+ ret = fread(m_security_data, 4);
+ if (ret != 4)
+ return image_init_result::FAIL;
+
+ return image_init_result::PASS;
+}
+
+void pgm2_memcard_device::call_unload()
+{
+ authenticated = false;
+ fseek(0, SEEK_SET);
+ fwrite(m_memcard_data, 0x100);
+ fwrite(m_protection_data, 4);
+ fwrite(m_security_data, 4);
+}
+
+image_init_result pgm2_memcard_device::call_create(int format_type, util::option_resolution *format_options)
+{
+ authenticated = false;
+ // cards must contain valid defaults for each game / region or they don't work?
+ memory_region *rgn = memregion("^default_card");
+
+ if (!rgn)
+ return image_init_result::FAIL;
+
+ memcpy(m_memcard_data, rgn->base(), 0x100);
+ memcpy(m_protection_data, rgn->base() + 0x100, 4);
+ memcpy(m_security_data, rgn->base() + 0x104, 4);
+
+ size_t ret = fwrite(rgn->base(), 0x108);
+ if(ret != 0x108)
+ return image_init_result::FAIL;
+
+ return image_init_result::PASS;
+}
+
+void pgm2_memcard_device::auth(uint8_t p1, uint8_t p2, uint8_t p3)
+{
+ if (m_security_data[0] & 7)
+ {
+ if (m_security_data[1] == p1 && m_security_data[2] == p2 && m_security_data[3] == p3) {
+ authenticated = true;
+ m_security_data[0] = 7;
+ }
+ else {
+ authenticated = false;
+ m_security_data[0] >>= 1; // hacky
+ if (m_security_data[0] & 7)
+ popmessage("Wrong IC Card password !!!\n");
+ else
+ popmessage("Wrong IC Card password, card was locked!!!\n");
+ }
+ }
+}
+
+READ8_MEMBER(pgm2_memcard_device::read)
+{
+ return m_memcard_data[offset];
+}
+
+WRITE8_MEMBER(pgm2_memcard_device::write)
+{
+ if (authenticated && (offset >= 0x20 || (m_protection_data[offset>>3] & (1 <<(offset & 7)))))
+ {
+ m_memcard_data[offset] = data;
+ }
+}
+
+READ8_MEMBER(pgm2_memcard_device::read_prot)
+{
+ return m_protection_data[offset];
+}
+
+WRITE8_MEMBER(pgm2_memcard_device::write_prot)
+{
+ if (authenticated)
+ m_protection_data[offset] &= data;
+}
+
+READ8_MEMBER(pgm2_memcard_device::read_sec)
+{
+ if (!authenticated)
+ return 0xff; // guess
+ return m_security_data[offset];
+}
+
+WRITE8_MEMBER(pgm2_memcard_device::write_sec)
+{
+ if (authenticated)
+ m_security_data[offset] = data;
+}