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README.md

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+A collection of 1802 machine code programs
+------------------------------------------
+
+Just some raw machine code for the RCA 1802/COSMAC, ready to toggle in
+or enter in some other way. Comments are added for clarity on every line.
+
+Format:
+-------
+
+Address (hexadecimal)
+Instruction (hexadecimal)
+Mnemonic (as found in the 1802 manual and other places)
+Comment

blink

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+; 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 	 A2	 162	  ...the value 162
+2 	 B2	 PHI R2	  Put it in the upper part of register 2
+3 	 22	 DEC R2	  Decrement register 2 by one
+4 	 92	 GHI R2	  Load the upper 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