| ??? 10/18/05 15:50 Modified: 10/18/05 15:59 Read: times |
#102580 - OT: Maxwell's equations Responding to: ???'s previous message |
Well, in fact, since times of Maxwell's equations, plus maybe some quantum theory of Planck et co., the whole electronics theory and stuff is slightly redundant... Everything can be deduced from them, with some effort...
Jan Waclawek [EDIT] OK this was really OT. Let me just add, for Jeff, he could also subtract for comparison, such as: mov a,r3 ;we want to know if r3 is greater or equal than 125 clr c ;subb subtrats with borrow, so to be sure we clear carry subb a,#125 jc Less ;we get here if r3 was greater than or equal 125 Less: This seems not too practical for single-byte variables as cjne is easier to do, but might be a way to compare multi-byte variables... OK they can be compared using cjne, too... the difference is, ehm, one byte of code memory... and the sub method lasts longer but lasts the same time for each input... mov a,r3 ;r3:r4 compare to 12345 cjne a,#HIGH(12345),Label1 mov a,r4 cjne a,#LOW(12345),Label1 Label1: jc Less ;here we have greater or equal Less: |
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