summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/machine/konami1.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/mame/machine/konami1.cpp')
-rw-r--r--src/mame/machine/konami1.cpp24
1 files changed, 24 insertions, 0 deletions
diff --git a/src/mame/machine/konami1.cpp b/src/mame/machine/konami1.cpp
index b4011d84ae3..f856a5da4ed 100644
--- a/src/mame/machine/konami1.cpp
+++ b/src/mame/machine/konami1.cpp
@@ -23,6 +23,30 @@ void konami1_device::device_start()
m6809_base_device::device_start();
}
+u32 konami1_device::disassembler::interface_flags() const
+{
+ return SPLIT_DECRYPTION;
+}
+
+u8 konami1_device::disassembler::decrypt8(u8 value, offs_t pc, bool opcode) const
+{
+ if (!opcode || pc < m_boundary)
+ return value;
+ switch (pc & 0xa) {
+ default:
+ case 0x0: return value ^ 0x22;
+ case 0x2: return value ^ 0x82;
+ case 0x8: return value ^ 0x28;
+ case 0xa: return value ^ 0x88;
+ }
+ return value;
+}
+
+std::unique_ptr<util::disasm_interface> konami1_device::create_disassembler()
+{
+ return std::make_unique<disassembler>(m_boundary);
+}
+
void konami1_device::set_encryption_boundary(uint16_t adr)
{
m_boundary = adr;