Help with 8085 entering in a number > 9
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Newbie Member
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| 29Sep2008,00:55 | #1 |
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Im trying to enter in a digit between 0 and 255 and store it in a register. I understand how to use BDOS to put a keyboard value into the A register but i cant figure out how to get the right value for a 2 or 3 digit number...
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Mentor
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| 22Oct2008,22:02 | #2 |
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Initialise some other register X to zero
1: Read the keyboard into A Calculate the value represented (subtract the ASCII value of 0, probably, and range check it) Error handling X=X*10+A Repeat from 1 until the input suggests the user has finished inputting data. |