I'm sorry for this noob topic but I really need help. I'm not asking anyone to do the program for me but I need some guidance and my professor did not help me at all when I went to visit him.
Assignment: This assignment is designed to help you get more familiar with basic assembly language instructions, the IO macros, and the bsvc system. For this assignment, you will write a program in Motorola M68000 assembler that takes as input a four digit year, and prints the day of the week for Christmas of that year.
Here is the formula to solve the problem:
Input:
Month Hardcoded, month = 12
Day Hardcoded, day = 25
Year Input from keyboard.
The Formula:
a = (14 - month) / 12
y = year - a
m = month + 12 * a - 2
d = (day + y + y / 4 - y / 100 + y / 400 + (31 * m / 12) ) % 7
Here is what I have so far but I am stuck
Prompt: dc.b "Enter the year"0
buffer: ds.b 82
Start: InitIO
SetEVT
lineout prompt
linein buffer
Cvta2 buffer,#4
moveq #12,D1
moveq #25, D2
moveq #14,D7
sub.w D1,D7
ext.l D7
divu #12,D7
So my next step is to do the y = year - a part of the formula right? Could someone please explain what to do just for this one step?
Here is the full link to the assignment http://pindar.sdsu.edu/cs237/prog2.html
Again I'm sorry I'm such a beginner and I feel bad just asking what to do but if you could just help me with this one step it will give me a better idea of what to do moving forward. Thanks.
