Mystery PCB Jumper Number Order

[DROBNJAK]

I need to connect IEEE-1394 6-pin cable to a pin group J28. Does anybody know how pin numbers are determined in this layout:



- Is a pin marked with A the pin #1? Or, is the pin marked with B the pin #1?

- Which are pins 2, 3, 4, 5 and 6? Is it that count grows by rows? Or, does count grows by columns?

Thanks in advance. Google just gives me a lots of answers how to connect HD disks and CD-ROMs, which is not my case.

[c4757p]

Across the bottom is 1 3 5 7 9, across the top is 2 4 6 8. Pin 1 is marked with a square pad.

[8086]

I need to connect IEEE-1394 6-pin cable to a pin group J28. Does anybody know how pin numbers are determined in this layout:



- Is a pin marked with A the pin #1? Or, is the pin marked with B the pin #1?

- Which are pins 2, 3, 4, 5 and 6? Is it that count grows by rows? Or, does count grows by columns?

Thanks in advance. Google just gives me a lots of answers how to connect HD disks and CD-ROMs, which is not my case.

Square pin is pin 1.

Generally you go up, then across and down. i.e. the pin directly above A would be pin 2, the one directly to the right of pin A would be pin 3, etc. Whats confusing me is the position of the 9th pin - in all the pinout diagrams I can find, it's in the 10th position, not the 9th...

[DROBNJAK]

Yeah, that is why could never get IEEE FireWire port working. Thanks guys.