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ghaerr / blink16

Tiny visual 8086 emulator based on Blink
ISC License
61 stars 4 forks source link

Not an issue, just questions about blink16 #5

Open Vutshi opened 3 months ago

Vutshi commented 3 months ago

Created to discuss things I don't understand about blink16.

  1. I found that the following code is shown as bipartite in blink16: 
    1000:0126 26                es                
1000:0127 8b 07             mov     (%bx),%ax

    whereas MartyPC and Ghidra show it as one instruction:

    Screenshot 2024-05-30 at 22 31 44

Is this intended behavior?

  1. Is there a way to switch the memory views to the actual byte values?

Best

ghaerr commented 3 months ago

I found that the following code is shown as bipartite in blink16: Is this intended behavior?

Yes - I grabbed the disassembler I had written for 86sim and it displays instruction prefixes on a separate line. Its on my list of things to enhance, but initially proved to be a bit more complicated than I had hoped. Both the 8086 emulator and disassembler are extremely small, only a single .c file each.

BTW, has the AT&T vs Intel 8086 instruction display difference driven you crazy yet? I suppose it would also be nice to have an Intel instruction display option.

Is there a way to switch the memory views to the actual byte values?

That is also on my list, and would be a nice enhancement.

Let me see what I can do...

Vutshi commented 3 months ago

BTW, has the AT&T vs Intel 8086 instruction display difference driven you crazy yet?

Yes, it gets on my nerves. I find Intel representation much cleaner because %%% hurt my eyes. On the other hand, the backward thinking in Intel seems strange to me.

I suppose it would also be nice to have an Intel instruction display option.

That would be cool.