clean up and added code for a simple counting function as a sanity check in the sandbox.

src/TC_answers/memory_test.asm

@@ -0,0 +1,43 @@
+#include "definitions.asm"
+; testing memory functionality
+prog:
+    imm6 32
+    load r0, r5         ; count
+
+    imm6 0
+    load r0, r3         ; start address (by preloading accumulator)
+    aload               ; setup counter for later and skip using the ALU for now, just move to 8
+
+    imm6 1              ; stride
+    load r0, r2
+
+    imm6 0
+    load r0, r1
+    load r0, r4         ; current
+
+    imm6 prog.save
+    ba
+.save_loop:
+    load r4, r1
+.save:
+    imm6 1
+    load r0, r2         ; stride
+
+    imm6 42             ; value to save
+    out r0              ; after aload "r6" = r3 contains the address you want to write
+    add                 ; r1 (count) - r2 (stride)
+    load r3, r4         ; save count
+
+    imm6 prog.end       ; check if we have reached the end of the write operation
+    load r5, r1
+    load r4, r2
+    sub
+    beqz                ; if count - current == 0, branch r0 (prog.end)
+
+    load r4, r3         ; restore result from count
+    aload               ; else, load result to address register 
+    imm6 prog.save_loop
+    ba                  ; and loop
+.end:
+.halt:
+    halt