Difference between revisions of "CSC103 2011 Assembly Language Examples"
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| + | =Program 2= | ||
| + | <code><pre> | ||
| + | ; program to display a bit pattern in graphics memory | ||
| + | start: lod pattern ;get the pattern | ||
| + | sto-i index ;store it in the image, at a location | ||
| + | lod index ;get the image index | ||
| + | add-c 1 ;make it point to next word in mem | ||
| + | sto index ;store it back | ||
| + | lod count ;get the counter | ||
| + | sub-c 1 ;subtract one | ||
| + | sto count ;store back | ||
| + | jmz done ;if counter is 0, we're done | ||
| + | lod pattern ;if not, we check the pattern | ||
| + | add pattern ;shift it to the left by 1 bit | ||
| + | sto pattern ;store it back | ||
| + | jmz resetPattern ;if pattern is 0, reset it | ||
| + | jmp start ;loop back | ||
| + | resetPattern: ;reset pattern to 1 | ||
| + | lod-c 1 | ||
| + | sto pattern | ||
| + | jmp start | ||
| + | done: hlt ;we're done! | ||
| + | pattern: 1 ;the pattern to store in graphics mem | ||
| + | count: 1000 ;how many words we fill up | ||
| + | index: image ;pointer to the image words | ||
| + | image: data ;the image starts here | ||
| + | </pre></code> | ||
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Revision as of 11:47, 15 February 2011
--D. Thiebaut 11:37, 15 February 2011 (EST)
Program 1
A program that computes the sum of all the integers between 1 and 5 and stores it into a variable called sum.
start: lod counter
add sum
sto sum
lod counter
sub-c 1
sto counter
jmz done
jmp start
done: hlt
counter: 5
sum: 0
Program 2
; program to display a bit pattern in graphics memory
start: lod pattern ;get the pattern
sto-i index ;store it in the image, at a location
lod index ;get the image index
add-c 1 ;make it point to next word in mem
sto index ;store it back
lod count ;get the counter
sub-c 1 ;subtract one
sto count ;store back
jmz done ;if counter is 0, we're done
lod pattern ;if not, we check the pattern
add pattern ;shift it to the left by 1 bit
sto pattern ;store it back
jmz resetPattern ;if pattern is 0, reset it
jmp start ;loop back
resetPattern: ;reset pattern to 1
lod-c 1
sto pattern
jmp start
done: hlt ;we're done!
pattern: 1 ;the pattern to store in graphics mem
count: 1000 ;how many words we fill up
index: image ;pointer to the image words
image: data ;the image starts here
