Initial commit

Assigments/3/A3a.asm

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+;first, clean registers
+;second, load x4002 into a register
+;third, determine if negative or positive
+;fourth depending on what it is, add it to memory location
+;stop when reaching a memory location of zero
+            .ORIG x3000             ;start point
+            
+            AND R6, R6, #0          ;clean R6
+            AND R5, R5, #0          ;clean R5
+            AND R4, R4, #0          ;clean R4
+            AND R3, R3, #0          ;clean R3
+            STI R3, NEGATIVEPOS     ;clean memory at location
+            STI R3, POSITIVEPOS     ;clean memory at location
+            
+            
+LOOP        LD R6, POSITION         ;load position into register
+            ADD R6, R6, #1          ;Add one to register
+            ST R6, POSITION         ;Store new value in memory
+            LDI R3, POSITION        ;Load from new value
+            ADD R3, R3, #0          ;test for negative
+            BRz DONE                ;Halt if result is zero
+            BRn NEGATIVE            ;Branch if negative
+            BRp POSITIVE            ;branch if positive
+            
+NEGATIVE    LDI R4, NEGATIVEPOS     ;load negatve total into r4
+            ADD R4, R4, R3          ;add stored value together with new value
+            STI R4, NEGATIVEPOS     ;store the new total back to negative total
+            BR LOOP                 ;loop back
+            
+POSITIVE    LDI R5, POSITIVEPOS     ;load positive total into r5
+            ADD R5, R5, R3          ;add stored value together with nuew value
+            STI R5, POSITIVEPOS     ;store the new total back into positive total
+            BR LOOP                 ;loop back
+DONE        HALT                    ;kill program
+POSITIVEPOS .fill x4000
+NEGATIVEPOS .fill x4001
+POSITION .fill x4001
+.END

Assigments/3/A3b.asm

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+;clean registers
+;load starting pos and starting pos +1 into memory
+;subtract first value (starting pos) from second value (starting pos +1)
+;if result is negative or zero, write 0 to x4000
+;if positive, loop back and do the same with the next two memory locations
+            .ORIG x3000             ;start point
+            
+            AND R6, R6, #0          ;clean R6
+            AND R5, R5, #0          ;clean R5
+            AND R4, R4, #0          ;clean R4
+            AND R3, R3, #0          ;clean R3
+            
+LOOP        LD R6, FIRSTPOS         ;block loads first pos into register increments memory value by one and store back
+            ADD R6, R6, #1
+            ST R6, FIRSTPOS
+            
+            LD R6, SECONDPOS        ;block loads second pos into register increments memory value by one and store back
+            ADD R6, R6, #1
+            ST R6, SECONDPOS
+            
+            LDI R3, FIRSTPOS        ;load values into memory and then create negative out of it
+            LDI R4, SECONDPOS
+            ADD R4, R4, #0          ;see if the array ends
+            BRz FINISH
+            NOT R3, R3
+            ADD R3, R3, #1
+            
+            ADD R5, R3, R4          ;add R3 and R4 into R5
+            BRp LOOP
+            LD R6, ZERO
+            STI R6, RESULT
+            HALT
+FINISH      LD R6, ONE
+            STI R6, RESULT
+DONE        HALT            
+
+FIRSTPOS .fill x4000
+SECONDPOS .fill x4001
+RESULT .fill x4000
+ONE .fill x0001
+ZERO .fill x0000
+.END

Assigments/3/Example.asm

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+         .ORIG x3000
+         LD R2, ZERO
+         LD R0, M0
+         LD R1, M1
+LOOP     BRz DONE
+         ADD R2, R2, R0
+         ADD R1, R1, #-1
+         BR LOOP
+DONE     ST R2, RESULT
+         HALT
+RESULT   .FILL x0000 
+ZERO     .FILL x0000
+M0       .FILL x0004
+M1       .FILL x0803
+         .END