Initial import of ViperOS

disk/app/helloworld.asm

@@ -0,0 +1,33 @@
+BITS 64
+
+%define SYSCALL_CREATE_WINDOW 1
+%define SYSCALL_DRAW_TEXT     2
+%define SYSCALL_EXIT          3
+
+section .text
+global _start
+
+_start:
+    lea rbx, [rel win_title]
+    mov rax, SYSCALL_CREATE_WINDOW
+    mov rbx, 100
+    mov rcx, 80
+    mov r10, 300
+    int 0x80
+
+    mov r12, rax
+
+    lea r10, [rel hello_text]
+    mov rax, SYSCALL_DRAW_TEXT
+    mov rbx, r12
+    mov rcx, 20
+    mov rdx, 30
+    int 0x80
+
+    mov rax, SYSCALL_EXIT
+    xor rbx, rbx
+    int 0x80
+
+section .data
+win_title: db "Hello World App", 0
+hello_text: db "Hello World!", 0