diff --git a/curs/chap-05-ihs/00-intro/Makefile b/curs/chap-05-ihs/00-intro/Makefile
new file mode 100644
index 00000000..7deeb706
--- /dev/null
+++ b/curs/chap-05-ihs/00-intro/Makefile
@@ -0,0 +1,46 @@
+CC = gcc
+CFLAGS = -O2 -m32 -g -fno-PIC
+NASM = nasm
+ASM_FLAGS = -f elf32 -g -F dwarf
+LD = ld  -melf_i386 -no-pie
+
+all : hello 
+
+sum_array: sum_array.o 
+	$(CC) -m32 -no-pie -o sum_array sum_array.o
+
+
+mul: mul.o 
+	$(CC) -m32 -no-pie -o mul mul.o
+
+subreg: subreg.o 
+	$(CC) -m32 -no-pie -o subreg subreg.o
+
+declarations: declarations.o 
+	$(CC) -m32 -no-pie -o declarations declarations.o
+
+decl: decl.o 
+	$(CC) -m32 -no-pie -o decl decl.o
+
+%.o : %.c
+	$(warning CC=$(CC) FLAGS=$(CFLAGS))
+	$(CC) -c $(CFLAGS) -o $@ $<
+
+sum_array.o : sum_array.asm
+	$(warning NASM=$(NASM) FLAGS=$(ASM_FLAGS))
+	$(NASM) $(ASM_FLAGS) -o $@ $<
+	
+
+declarations.o : declarations.asm
+	$(warning NASM=$(NASM) FLAGS=$(ASM_FLAGS))
+	$(NASM) $(ASM_FLAGS) -o $@ $<
+	
+mul.o : mul.asm
+	$(warning NASM=$(NASM) FLAGS=$(ASM_FLAGS))
+	$(NASM) $(ASM_FLAGS) -o $@ $<
+
+subreg.o : subreg.asm
+	$(warning NASM=$(NASM) FLAGS=$(ASM_FLAGS))
+	$(NASM) $(ASM_FLAGS) -o $@ $<
+clean: 
+	rm -f *.o subreg declarations decl mul sum_array
diff --git a/curs/chap-05-ihs/00-intro/decl.c b/curs/chap-05-ihs/00-intro/decl.c
new file mode 100644
index 00000000..13acbaf3
--- /dev/null
+++ b/curs/chap-05-ihs/00-intro/decl.c
@@ -0,0 +1,11 @@
+int a = 9;
+int b;
+
+char t = 1;
+
+void main()
+{
+    int a, b;
+    a = 0;
+    b = 7;
+}
diff --git a/curs/chap-05-ihs/00-intro/declarations.asm b/curs/chap-05-ihs/00-intro/declarations.asm
new file mode 100644
index 00000000..e5f1b141
--- /dev/null
+++ b/curs/chap-05-ihs/00-intro/declarations.asm
@@ -0,0 +1,52 @@
+section .data
+    var1: db 9
+    var2: dw 10
+    var3: dd 11
+    arr1: db 8, 9, 10
+    arr2: dw 8, 9, 10
+    arr3: dd 0xAABBCCDD, 0x11223344, 0x55667788
+    str: db "Hello World",0
+
+section .bss
+    a: resb 4
+
+section .rodata
+    b: dd 9
+
+section .text
+    global main
+
+main:
+    xor eax, eax
+    mov al, [var1]
+    mov ah, [var1]
+    mov ax, [var2]
+    mov eax, [var3]
+
+    xor ebx, ebx
+    mov bl, [arr1]
+    mov bh, [arr1 + 1]
+    mov bl, [arr1 + 2]
+
+    mov bx, [arr2]
+    mov bx, [arr2 + 2]
+    mov bx, [arr2 + 3]
+
+    mov ebx, [arr3 + 4]
+
+    mov cl, [str]
+    mov ecx, [str]
+
+    mov eax, [a]
+    mov ebx, [b]
+
+    mov ax, [var1]
+    mov ax, [var1 + 1]
+    mov eax, [var1]
+    mov eax, [arr3 + 2]
+
+    mov dword[a], 0xaabbccdd
+     ;mov [b], ebx
+     mov dword[a], 20
+
+    ret
diff --git a/curs/chap-05-ihs/00-intro/mul.asm b/curs/chap-05-ihs/00-intro/mul.asm
new file mode 100644
index 00000000..4ace2e47
--- /dev/null
+++ b/curs/chap-05-ihs/00-intro/mul.asm
@@ -0,0 +1,36 @@
+section .data
+    num1: dd 10
+    num2: dd 40
+
+    num3: dw 500
+    num4: dw 3
+
+    num5: dw 1
+
+section .bss
+    a: resb 4
+
+section .text
+    global main
+
+main:
+
+    mov al, [num1]
+    mov bl, [num2]
+
+    mul bl
+
+    mov ax, [num3]
+    xor dx, dx
+    mov cx, [num5]
+    div cx
+
+    mov ax, [num3]
+    mov cl, [num4]
+    div cl
+
+    ;mov ax, [num3]
+    ;mov cl, [num5]
+    ;div cl
+
+    ret
diff --git a/curs/chap-05-ihs/00-intro/subreg.asm b/curs/chap-05-ihs/00-intro/subreg.asm
new file mode 100644
index 00000000..c5c5fe5c
--- /dev/null
+++ b/curs/chap-05-ihs/00-intro/subreg.asm
@@ -0,0 +1,11 @@
+section .text
+    global main
+
+main:
+    mov eax, 1
+    shl eax, 28
+    mov al, 10
+    mov ah, 10
+    mov eax, 11
+    ret
+