About interrupt calls... If it finds such a call, all it has to do is look at the call's input registers (assuming they are in registers) and output the call wi

About interrupt calls... If it finds such a call, all it has to do is look at the call's input registers (assuming they are in registers) and output the call with the 'logical' contents of the registers. The x86 code is basically 32-bit Windows. I haven't got a 16-bit compiler. However, it should work for 16-bit. The key thing is that you can write specialised modules for each CPU, and the rest (loops, variables) are standardised. On the business side... Basically, my 6502 decompiler works the best so I thought I could sell that. And as for x86, there are issues to do with structs & arrays, that I haven't had time to figure out. As for the decompiler software, I plan to finish the x86 and ARM decompilers and sell them for a reasonable price (say, $150 for all CPUs, not just one). As noted, arrays & structs are a problem. As for 'release code', anyone can write a CPU module, but I need to document it first. Thanks for your comments.