RPG Maker 2 computer instruction set

--0xxxxx immediate positive
--1xxxxx immediate negative
--2xxxxx absolute
--3xxxxx indirect
--4xxxxx accumulator, X is ignored

00mxxxxx NOP nop
01mxxxxx LDA load
02mxxxxx STA store
03mxxxxx ADD add
04mxxxxx SUB subtract
05mxxxxx MUL multiply
06mxxxxx DIV divide
07mxxxxx MOD modulo
08mxxxxx ASK input number, store to X
09mxxxxx SAY print number X
10mxxxxx JMP absolute jump to X
11mxxxxx JMR relative jump (PC += X)
12mxxxxx INE skip equal
13mxxxxx IEQ skip not equal
14mxxxxx IGE skip less than
15mxxxxx IGT skip less or equal
16mxxxxx ILE skip greater than
17mxxxxx ILT skip greater or equal
18mxxxxx RND random
19mxxxxx INC increment mem
20mxxxxx DEC decrement mem

21mxxxxx JSR jump to subroutine
22mxxxxx RTS return from subroutine
23mxxxxx PHM push memory
24mxxxxx PLM pull memory  (zero=pop to accumulator)
25mxxxxx
26mxxxxx
27mxxxxx
28mxxxxx
29mxxxxx
30mxxxxx
31mxxxxx
32mxxxxx

----sample programs----
print 1 to X
00 01000000 load
01 08000030 get max count user wants
02 09400000 show accumulator
03 03000001 increment counter
04 16200030 is it at the stopping value yet?
05 10000002 skip back to the loop if it isn't
06 10000006 otherwise infinite loop

sum of 3 numbers
00 08000020 get number 1
01 08000021 get number 2
02 08000022 get number 3
03 01200020 load number 1
04 03200021 add number 2
05 03200022 add number 3
06 09400000 display accumulator
07 10000000 loop


00 01000002 load two (first prime)
01 02000030 store current prime try
02 09200030 display prime (in accumulator)          <-- jump here if successful
03 19000030 increment current try                   <-- jump here if not successful
04 01200030 get current prime try
05 02000031 store a temp copy that will count down
06 20000031 decrement counter                       <-- loop start
07 01200030 load current try
08 07200031 mod with counter
09 13000000 skip if nonzero (new try if zero)
10 10000003 new try
11 01200031 load counter
12 12000002 is it zero?
13 10000006 loop more
14 10000002