Regulus Berdin [rberdin at BIGFOOT.COM]
this is 2x faster (500kbps @ 4MHz) : ; serial tx ; assumes PORTB1 initially on high state mov W, >>data xor data, W mov W, #1 xor RB, W ;start bit snb C xor RB, W ;b0 snb data.0 xor RB, W ;b1 snb data.1 xor RB, W ;b2 snb data.2 xor RB, W ;b3 . . . nop setb RB.0 ;
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Ashley Roll has put together a really nice little unit here. Leave off the MAX232 and keep these handy for the few times you need true RS232!
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