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Carol
PostPosted: Tue Oct 28, 2008 9:48 pm 
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Location: Northeast Ohio
how would you write a machine language program that adds the numbers 1,2,3,4,5 and 6 together and place the sum into location 0280h?
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GARTHWILSON
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PostPosted: Tue Oct 28, 2008 10:06 pm 
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Joined: Fri Aug 30, 2002 1:09 am
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Should I assume this is homework? How much help will the teacher approve of? There are several ways you could do it. Without just giving it away, I might suggest starting with 0 in A and storing your number in address 280. Every time you add the contents of address 280 to A you decrement address 280 until it reaches 0. When that's done looping, store A in 280.
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Carol
 Post subject: machine language program
PostPosted: Tue Oct 28, 2008 10:34 pm 
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Joined: Tue Oct 28, 2008 9:41 pm
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Thank you for the quick reply. I am the teacher and my grandson is the student who is home schooled. We are a little confused about his computer class problem and any help would be appreciated.

Thanks,
Carol
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GARTHWILSON
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PostPosted: Tue Oct 28, 2008 11:28 pm 
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Start with your number in 280H. It must be in the range of 1 to 22 decimal (1 to 16H) to avoid errors. Then:
Code:
        LDA   #0
        CLC
loop:   ADC   280H
        DEC   280H
        BNE   loop
        STA   280H
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Carol
 Post subject: machine language program
PostPosted: Tue Oct 28, 2008 11:37 pm 
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Joined: Tue Oct 28, 2008 9:41 pm
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Location: Northeast Ohio
Thanks soooooo much

Carol
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