How to build a x64/x86-project with a standalone x64/x86 assembly file 1) Start Visual Studio (Community) 2017 and choose FILE – New – Project. 2) In the next window choose Empty Project. 3) Make sure, that the project is highlighted in the Solution Explorer and and choose PROJECT – Build Customizations…. 4) In the next … Read more
NASM answer, MASM is totally different One of the answers on the linked question has a quote from the NASM manual’s examples which does answer your question. As requested, I’ll expand on it for all three cases (and correct the lower-case vs. upper-case ASCII encoding error!): db ‘ABCDE’ ; 0x41 0x42 0x43 0x44 0x45 (5 … Read more
Summary: NASM/YASM requires word [ecx] when the operand-size isn’t implied by the other operand. (Otherwise [ecx] is ok). MASM/TASM requires word ptr [ecx] when the operand-size isn’t implied by the other operand. (Otherwise [ecx] is ok). They each choke on the other’s syntax. WARNING: This is very strange area without any ISO standards or easy-to-find … Read more
The correct format for hex AB is 0ABh. The reason you need to start it with a digit is so the assembler can easily distinguish it from a label or symbol such as ABh. And don’t worry about the fact it has three digits. It doesn’t magically turn into a twelve-bit number because of that, … Read more
MASM is unusual for an assembly language in that is has types. MASM knows because of how you defined the symbol item that is a memory location of type DWORD. When you use it as an operand knows that you (probably) mean that you want the value stored at the address, not the value of … Read more