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JoeJoe · 08 September 2020, 10:48

Hello coder,

I am currently working on the display and calculation of scores. I have already read the thread "BCD Arithmetic - howto^". The simple adding and subtracting is no problem. But I have to divide the score by 50. Also the points can be increased by graduation 3*90 or 5*240 etc.
Now to my problem. For dividing and multiplying with BCD there are no 1:1 commands. Multiplying can be avoided by using LookUp tables and adding. But for x:50 there is no alternative.
Of course I can calculate everything in hex and convert the hex values to decimal for the display. But this eats a lot of cycles.

How can I solve the problem without overloading the computer.

Thanks in advance
JoeJoe

@Admins: please move to right section, sorry

08 September 2020, 10:48	#1
JoeJoe Registered User Join Date: Feb 2020 Location: Germany Posts: 177	div and mul of BCD or Hex? Hello coder, I am currently working on the display and calculation of scores. I have already read the thread "BCD Arithmetic - howto^". The simple adding and subtracting is no problem. But I have to divide the score by 50. Also the points can be increased by graduation 390 or 5240 etc. Now to my problem. For dividing and multiplying with BCD there are no 1:1 commands. Multiplying can be avoided by using LookUp tables and adding. But for x:50 there is no alternative. Of course I can calculate everything in hex and convert the hex values to decimal for the display. But this eats a lot of cycles. How can I solve the problem without overloading the computer. Thanks in advance JoeJoe @Admins: please move to right section, sorry Last edited by JoeJoe; 08 September 2020 at 11:44. Reason: wrong section