begin working on test bios disk reading subroutine

Makefile

@@ -97,7 +97,7 @@ $(OBJ_DIR)/%.o: $(SRC_DIR)/%.s
 	$(AS) $(ASFLAGS) -o $@ $<
 	$(OBJCOPY) --remove-section .note.gnu.property $@
 
-MBR_TEST_OBJ		=	obj/mbr_test.o obj/serial.o obj/itoa.o obj/util.o obj/test_disk_params.o
+MBR_TEST_OBJ		=	obj/mbr_test.o obj/serial.o obj/itoa.o obj/util.o obj/test_disk_target.o
 
 mbr_test: $(MBR_TEST_OBJ) $(DISK)
 	$(LD) -T src/mbr_test.ld -o $(BIN_DIR)/mbr_test.bin $(MBR_TEST_OBJ)

src/test_disk_read.s

@@ -0,0 +1,24 @@
+.section .text
+.code16
+
+.globl test_disk_read
+
+# eax   - LBA address
+# cx    - number of sectors
+# es:di - destination
+test_disk_read:
+    # here we need to convert LBA into CHS
+    ret
+
+# ds:si - sector
+test_disk_taste_sector:
+    # test pattern partition - each sector has 32 bit integer in beginning
+    # so we read this integer and output it, it must increment as well as LBA address
+    lodsd # load 32 bit into eax
+    mov $str_taste, %si
+    call prints_number
+
+    ret
+
+.section .rodata
+str_taste:  .asciz  "Sector test pattern: "