The other day I posted the simple microporcessor design that I created as an undergraduate. As a part of that project I also had to write an assembler and simulator for the processor. Way back in 2011, when I was working on this project, the Hipster movement was nearing its peak in the US, and I had to find a nerdy way to get some irony. I decided it would be awesome to write the assembler and simulator in JavaScript. So, for those of you who want to run some Simple-12 programs online, check out my web-based Simple-12 simulator. Below are some sample programs.
#
# Print the first 7 Fibonacci numbers
# Christopher Stoll
#
.code
main: ld parm1
print # print the number
ld limit # load limit decrementor
jz end # decremented to zero, exit
sub one # decrement counter
st limit # store decrementor
ld parm1
add parm2
st parm3 # next Fibonacci
ld parm2
st parm1 # parm1 = parm2
ld parm3
st parm2 # parm2 = parm3
j main # loop
end: exit
.data
one: word 1 # constant: 1
parm1: word 1 # Fibonacci 1
parm2: word 1 # Fibonacci 2
parm3: word 0 # Fibonacci temp
limit: word 6 # decrementor
#
# Find maximum value in a vector of positive integers
# Christopher Stoll, 2001
#
.data
one: word 1
ary1: word 1
word 3
word 7
word 5
word 2
word 6
word 9
word 4
word 8
word -1
arypo: word @ary1
highv: word 0
.code
main: li arypo # load array mem location
add @one # add 1 to the value
jz end # if acc is zero end (sentinel)
sub @one # subtract 1 back out
sub highv # subtract the high value
jn inc # high value > current, loop
jz inc # high value == current, loop
li arypo # load current value
st highv # store new high value
inc: ld arypo # load array position
add @one # increment array position
st arypo # store array position
j main # loop
end: ld highv # load the high value
print # show the high value
exit
