I tried running
the Alone in the Dark demo in JPC-rr and got the following error:
Object in invalid state for operation (Missing Operation: 0xfeb)
writeOperation of org.jpc.emulator.memory.codeblock.optimised.RealModeUDecoder <RealModeUDecoder>
decodeOpcode of org.jpc.emulator.memory.codeblock.optimised.RealModeUDecoder <RealModeUDecoder>
decode of org.jpc.emulator.memory.codeblock.optimised.RealModeUDecoder <RealModeUDecoder>
getNext of org.jpc.emulator.memory.codeblock.optimised.RealModeUDecoder <RealModeUDecoder>
buildCodeBlockBuffers of org.jpc.emulator.memory.codeblock.optimised.OptimisedCompiler <OptimisedCompiler>
getRealModeCodeBlock of org.jpc.emulator.memory.codeblock.optimised.OptimisedCompiler <OptimisedCompiler>
getRealModeCodeBlock of org.jpc.emulator.memory.codeblock.DefaultCodeBlockFactory <DefaultCodeBlockFactory>
tryRealModeFactory of org.jpc.emulator.memory.codeblock.CodeBlockManager <CodeBlockManager>
getRealModeCodeBlockAt of org.jpc.emulator.memory.codeblock.CodeBlockManager <CodeBlockManager>
executeReal of org.jpc.emulator.memory.LazyCodeBlockMemory <LazyCodeBlockMemory>
executeReal of org.jpc.emulator.memory.PhysicalAddressSpace <PhysicalAddressSpace>
executeReal of org.jpc.emulator.PC <PC>
execute of org.jpc.emulator.PC <PC>
main of org.jpc.plugins.PCControl <PCControl>
run of org.jpc.pluginsbase.Plugins$PluginThread <Plugins>
It runs fine in DosBox. More investigation is needed to figure out why JPC-rr is throwing the error, but this at least gives someone a place to start from.