diff --git a/Hardware.md b/Hardware.md
index a9bb1c8..3e9705e 100644
--- a/Hardware.md
+++ b/Hardware.md
@@ -1,9 +1,28 @@
-* Support up to 65535 hardware devices
-* HWQ
-* HWI
-* HWN
+The game's microprocessor can handle up to 65535 hardware devices connected to addresses 0x0000-0xFFFF. Hardware devices can interact with the CPU, its memory and its registers. 
 
-- Drill
+The **HWQ** (Hardware Query) instruction can be used to get information about the hardware connected at an address.
+
+Exemple:
+```assembly
+MOV A, 0x0005
+HWQ A
+; The hardware id of the hardware at address 0x0005 is stored in the B register
+; If there is no hardware device connected at this address, B = 0
+```
+
+The **HWI** (Hardware Interupt) instruction sends an interrupt to the hardware device at the specified address
+```assembly
+; Get the current held item id
+INVENTORY_HW equ 0x0006 ; An inventory module is connected at address 0x006
+MOV A, 1 ; The Inventory hardware expects 1 (POLL) or 2 (CLEAR)
+HWI INVENTORY_HW
+; B = current held item id 
+```
+
+### Hardware Devices:
+
+
+- [Drill](https://github.com/simon987/Much-Assembly-Required/wiki/Hardware:-Drill)
 - Inventory
 - Laser
 - Legs