; blink (from the membership card manual by Lee Hart)
; 1802 machine code
; This program makes use of some basic building blocks like
; jumps, conditional jumps, decrements, and immediate loading.

; Memory address, command in hexadecimal, mnemonic, comment

0 	 F8	 LDI	  Load immediate...
1 	 02	 2	  ...the value 2
2 	 A2	 PLO R2	  Put it in the lower part of register 2
3 	 22	 DEC R2	  Decrement register 2 by one
4 	 82	 GLO R2	  Load the lower part of register 2
5 	 3A	 BNZ 	  Branch if that is not zero...
6 	 03	 3	  ...to address 3
7 	 CD	 LSQ	  Long skip (skip two next) if Q=1
8 	 7B	 SEQ	  Set Q to 1
9 	 38	 SKP	  Skip next
A 	 7A	 REQ	  Set Q to 0
B 	 30	 BR	  Branch...
C 	 00	 0	  ...to address 0