517 in text book how many times does the lc 3 make a read or...

(5.17 in text book) How many times does the LC-3 make a read or write request to memory during the processing of the LD instruction? How many times during the processing of the LDI instruction? How many times during the processing of the LEA instruction? Processing includes all phases of the instruction cycle.

Transcript

00:01 In this question we have a load instruction which the load destination with the context content of the address obtained by adding sign extended 9 bit with compressed increment pieces of flag list per object are used.

00:21 So, solve it further here, ld is equal to the value at address pc plus 1 plus offset.

00:33 So, we can consider the given instruction at into x3000.

00:37 So, it is ld into r33 minus 5.

00:42 So, this interaction, it is x3001 plus minus 5.

00:48 It is equal to the x2 x2 f f c 2 r3 so we have got this so r3 it is equal to o x 2 f f c so the instruction can be substituted using lea and ldr so le this is a effective load effective load instruction address instruction with the load address obtained by implemented pc with the extended 9 -bit software so it syntax is le a rd rd stack offset offset and this rd it is equal to pc plus 1 plus offset so the instruction format that we have to see it is like this this is our instruction format here it is 1 1 1 0 it is already and it is offset 9 offset 9 so let's see further we for ldr let's see for ld so here in the ldr the load is the justin with the value of address obtained by adding adding the extended 6 bits here earlier it was 9 bit now it is 6 bits so we're doing it offset already it is equal to the value at rb value at rb plus offset plus offset so the instruction format for this it is somewhat like this trying it the rough end so it will be looking like this 0 1 1 0 it is rd it is rb and it is offset 6 so here the address address x 2 f fc is loaded to r 3 it is loaded to r 3 and i loaded with the various so there's no registers effort so here the code will be code will be code here it is x three zero zero zero and it is lea r3 r3 hash minus five so the load r3 will register it will be the pc plus one plus minus five it is equal to the x three zero zero one minus five it is equal to x two f fc so so the instruction format, it will be like this.

03:04 Instruction format will be like this...

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