Post by thread:new 16C84 user needs help!

I hacked up a little PIC programmer on a Z80-based computer I had lying around, and it seemed to work (I could program stuff into the EEPROM and read it back) so I wrote, and hand-assembled, the following program, which I thought would blink the lines of port B on & off in such a way that I could see on a scope that things were working. Unfortunately, all I get is 33%-duty cycle pulses out of RB0 and RB2, and nothing elsewhere. Can one of you PIC gurus tell me what I'm doing wrong? 0000 0005 (reset vector) ... 0005 1683 BSF 3,5 ; Select page 1 0006 3000 MOVLW 0 ; Clear TRISB 0007 0086 MOVWF 86 0008 1283 BCF 3,5 ; Point back to page 0 0009 0186 CLRF 6 ; Port B all LOW 000a 30FF MOVLW FF 000b 0086 MOVWF 6 ; Port B all HIGH 000c 0064 CLRWDT 000d 2809 GOTO 9 [This is my *very* *first* PIC program; be gentle! :-)] Thanks, --------------------------------------- ----------------------------- dave madden <spam_OUTdhmTakeThisOuTvheissu.net.dcl.co.jp> i don't know about your brain, 3-16-19 naka-machi #301 but mine is really ... bossy. musashino, tokyo 180 japan -l. anderson