From 1a052f3a6cf64350f2c1ff407f032e9729172a34 Mon Sep 17 00:00:00 2001
From: mykola2312 <49044616+mykola2312@users.noreply.github.com>
Date: Sun, 4 Aug 2024 19:50:13 +0300
Subject: [PATCH] done with itoa function

---
 src/itoa.s     | 13 +++++++++----
 src/mbr_test.s | 10 ++++++++++
 2 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/src/itoa.s b/src/itoa.s
index 117bfbc..9d0d0d4 100644
--- a/src/itoa.s
+++ b/src/itoa.s
@@ -13,24 +13,29 @@ itoa:
     mov $numbers, %bx
 
     mov $(itoa_result + ITOA_BUFFER_SIZE - 1), %di
+    movb $0, (%di)
+    dec %di
     std
 .div:
     divl %ecx
-    or %eax, %eax
-    jz .end         # we run out of numbers
 
     # yep, we're using LUT for number -> character conversion since ASCII is a fuck
     push %eax
-    add %bx, %ax
+    movb (%ebx,%edx,1), %al
     stosb
     pop %eax
 
-    jmp .div
+    xor %edx, %edx
+    
+    or %eax, %eax
+    jnz .div
 .end:
+    # we run out of numbers
     cld
 
     # we return ptr to string, since we're pushing chars in reverse, therefore
     # beginning of string will change
+    inc %di
     mov %di, %ax
 
     pop %bx
diff --git a/src/mbr_test.s b/src/mbr_test.s
index e0d99ef..3423637 100644
--- a/src/mbr_test.s
+++ b/src/mbr_test.s
@@ -43,6 +43,16 @@
 
     mov %ax, %si
     call prints
+
+    mov $'\n', %al
+    call serial_putc
+
+    mov $691337, %eax
+    mov $10, %ecx
+    call itoa
+
+    mov %ax, %si
+    call prints
 .halt:
     jmp .halt