Simple/Decimal Computer Examples

1. Read in two input values, and display their sum on the output. Program starting address is 20.
   040 - 041 - 440 - 241 - 542 - 142 - 900
   
   
2. Count from 1-3 displaying each value on the output. Program starting address in 40.
   400 - 510 - 110 - 200 - 510 - 110 - 200 - 510 - 110 - 900
   
   
3. Count from 1-? displaying each value on the output (infinite loop). Program starting address is 30.
   400 - 510 - 110 - 200 - 631
   
   
4. Count from -x to 0, displaying each value on the output (loop with test). -x is stored in cell 19; program starting address is 20.
   419 - 200 - 518 - 118 - 721 - 900
   
   
5. Add together n input values and display their sum on the output. n is prestored in location 5 and the program starting address is 20.
   405 - 300 - 505 - 729 - 090 - 491 - 290 - 591 - 620 - 191 - 900
   
   In programs like this it is recommended that one first initialize the memory cell that is to serve as the running total (i.e. cell 91) to zero. The code to do this is: 400 - 300 - 591

Here is the sum n values program, properly annotated:

Cell 5: loop counter: initialized from input
Cell 10: sum: initialized to zero
Cell 11: current value read in from input
Cell 20: Starting address of the program

Cell	Code	Comment
20	005	Read in counter: number of values to sum
21	400	Cells 21-23: zero out sum (cell 10)
22	300
23	510
24	405	Cells 24-26: Decrement counter (cell 5)
25	300
26	505
27	740	Test if done: counter is negative
28	630	Goto iteration of loop: add in another value
30	011	Read in value to sum (cell 11)
31	410	Put sum into ACC
32	211	Add new value to Sum
33	510	Store off new value of sum (cell 10)
34	624	Go test loop counter
40	110	Output sum (cell 10)
41	900	TTFT