Use collapse (details and summary) html tags for the long list of constants and add example using constants (print_battery)

Assembly-program-examples.md

@@ -78,11 +78,17 @@ y_is_positive:
     
     POP BP              ; Restore the previous stack frame
     RET 2               ; Return and POP our 2 arguments
-
 ```
 
-Constants by hackersoup with [more contributors](https://github.com/simon987/Much-Assembly-Required/wiki/Assembly-program-examples/_history)
+<details>
-```assembly
+<summary>
+Constants by hackersoup with help from 
+<a href="https://github.com/simon987/Much-Assembly-Required/wiki/Assembly-program-examples/_history">contributors</a>
+<br>
+Insert this code before the new code you write for MuchAssemblyRequired, and use a text editor like VSCode, Notepad++, Sublime, etc. for auto-complete.
+</summary>
+
+```
 ;; Hardware IDs
 HWID_LEGS     equ 0x1
 HWID_LASER    equ 0x2
@@ -249,6 +255,33 @@ FLOPPY_WRITE_SECTOR equ 3 ; Cost: 1kJ
 ;;  Read and write operations are synchronous. Track seeking time is 2ms.*
 ;;  *Seek time is added to the total execution time, which is not yet calculated as of v1.3a
 ```
+</details>
+
+example usage using these constants
+```assembly
+.text
+    CALL print_battery
+
+;;;;; void print_battery()
+; display / print remaing battery charge
+; does not require arguments from stack or register prior to calling
+; does not overwrite or alter stack or registers
+print_battery:
+    PUSH A ; store A
+    PUSH B ; store B
+
+    MOV A, BATTERY_POLL ; indicates we want to poll the battery charge when interrupt sent to battery
+    HWI HWID_BATTERY    ; battery remaining charge (kilo Joules)
+                        ; is stored in B register now
+
+    MOV A, HOLO_DISPLAY_HEX ; HOLO_DISPLAY_HEX == BATTERY_POLL == 1
+                            ; makes this redundant, but you get the idea
+    HWI HWID_HOLO           ; value in B register is displayed on your bot
+
+    POP B
+    POP A
+    RET
+```
 
 Dump memory to disk
 ```assembly