VS Code Extensions
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ASM Language Syntax

by jellybyte

Assembly syntax highlighting, and auto complete.

Downloads

10

Rating

— (0)

Version

0.0.1

Last updated

Jul 31, 2026

This is the assembly language syntax extension.

Features

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For example if there is an image subfolder under your extension project workspace:

![Syntax highlighting for many different registers, and instructions (only supports x86). ] ![With built-in auto complete with not only the registers and instructions, but also it has snippets that allow you to do stuff like label that does.]

Built-in snippets

When installing the assembly language syntax extension you get auto complete with these auto complete snippets:

  1. The label snippet, use the 'label' auto complete and you get this:
newlabel:
    ;	newlabel object
  1. The string snippet, use the 'string' auto complete and you get this:
myString:	db 'This is my string!'
  1. The osboot snippet, use the 'osboot' auto complete (osboot gives you a completely working operating system, it only prints a message but it technically is an operating system since it boots) and you get this:
[org 0x7c00]         ; Tell the assembler the BIOS loads us at memory address 0x7C00

mov ah, 0x0e         ; BIOS teletype video service (print character to screen)
mov si, msg          ; Move the memory address of our string into the SI register

print_loop:
    lodsb            ; Load the byte from [SI] into the AL register, then increment SI
    cmp al, 0        ; Check if the character is the null-terminator (0)
    je halt          ; If it is 0, jump to the halt loop
    int 0x10         ; Trigger BIOS Video Services interrupt to print the char in AL
    jmp print_loop   ; Repeat for the next character

halt:
    cli              ; Clear interrupts (disable them)
    hlt              ; Halt the CPU
    jmp halt         ; Infinite fallback loop if an interrupt wakes the CPU

msg:
    db 'Hello, OS World!', 0

; --- Bootloader Padding & Signature ---
times 510 - ($-$$) db 0   ; Pad the remaining bytes up to 510 with zeros
dw 0xaa55                 ; The 2-byte magic boot signature (bytes 511 and 512)

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