On the Subject of Assembly Code

Why are registers important, when you are already modifying them!

On the module, there are 3 displays. The left display will have 8 "codes", the top display will have a description of what a "code" does, and the right display tells you the position of the list you are in.

The list on the left of the module is index-0.

To solve the module, multiply the number of AA batteries by 2 and add 1. Modulo 8 and add 1 again. If there is any Lines of code, Scripting, or Brainf---, the number is 0. This number is the "code" you are going to solve for in each stage, where the "code" is the 3-5 letter word on the left of the module and the 2nd column in the list below.

Refer to the list below to get the description. You can also use the 2 buttons to cycle through the descriptions on the top of the module.

Index	Code	Meaning
1	AAA	ASCII adjust AL after addition
2	AAD	ASCII adjust AX before division
3	AAM	ASCII adjust AX after multiplication
4	AAS	ASCII adjust AL after subtraction
5	ADC	Add with carry
6	ADD	Add
7	AND	Logical AND
8	CALL	Call procedure
9	CBW	Convert byte to word
10	CLC	Clear carry flag
11	CLD	Clear direction flag
12	CLI	Clear interrupt flag
13	CMC	Complement carry flag
14	CMP	Compare operands
15	CMPSB	Compare bytes in memory
16	CMPSW	Compare words
17	CWD	Convert word to doubleword

18	DAA	Decimal adjust AL after addition
19	DAS	Decimal adjust AL after subtraction
20	DEC	Decrement by 1
21	DIV	Unsigned divide
22	ESC	Used with floating-point unit
23	HLT	Enter halt state
24	IDIV	Signed divide
25	IMUL	Signed multiply
26	IN	Input from port
27	INC	Increment by 1
28	INT	Call to interrupt
29	INTO	Call to interrupt if overflow
30	IRET	Return from interrupt
31	Jcc	Jump if condition
32	JCXZ	Jump if CX is zero
33	JMP	Jump
34	LAHF	Load FLAGS into AH register
35	LDS	Load pointer using DS
36	LEA	Load Effective Address
37	LES	Load ES with pointer
38	LOCK	Assert BUS LOCK# signal
39	LODSB	Load string byte
40	LODSW	Load string word
41	LOOP	Loop control
42	MOV	Move
43	MOVSB	Move byte from string to string
44	MOVSW	Move word from string to string
45	MUL	Unsigned multiply
46	NEG	Two's complement negation
47	NOP	No operation

48	NOT	Negate the operand, logical NOT
49	OR	Logical OR
50	OUT	Output to port
51	POP	Pop data from stack
52	POPF	Pop FLAGS register from stack
53	PUSH	Push data onto stack
54	PUSHF	Push FLAGS onto stack
55	RCL	Rotate left (with carry)
56	RCR	Rotate right (with carry)
57	REPxx	Repeat MOVS/STOS/CMPS/LODS/SCAS
58	RET	Return from procedure
59	RETN	Return from near procedure
60	RETF	Return from far procedure
61	ROL	Rotate left
62	ROR	Rotate right
63	SAHF	Store AH into FLAGS
64	SAL	Shift Arithmetically left (signed shift left)
65	SAR	Shift Arithmetically right (signed shift right)
66	SBB	Subtraction with borrow
67	SCASB	Compare byte string
68	SCASW	Compare word string
69	SHL	Shift left (unsigned shift left)
70	SHR	Shift right (unsigned shift right)
71	STC	Set carry flag
72	STD	Set direction flag
73	STI	Set interrupt flag
74	STOSB	Store byte in string
75	STOSW	Store word in string
76	SUB	Subtraction
77	TEST	Logical compare (AND)

78	WAIT	Wait until not busy
79	XCHG	Exchange data
80	XLAT	Table look-up translation
81	XOR	Exclusive OR