8086 assembly on DOSBox: Bug with idiv instruction?
问题 I was helping a friend of mine debug his program, and we narrowed it down to an issue which occurs even here: .MODEL small .STACK 16 .CODE start: mov ax, 044c0h mov bl, 85 idiv bl exit: mov ax, 4c00h int 21h end start After assembling it with tasm 4.1, and running it on DOSBox 0.74, it goes into an infinite loop. When inspecting it with turbo debugger one can see it happens after the idiv instruction, which for some reason modifies the cs and ip registers, and after two seemingly random