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Re: Working towards something good*
Polymorph wrote:
> On Feb 28, 11:05 am, "Michael J. Mahon" <mjma...@aol.com> wrote:
>
> <snip>
>
>> There is almost certainly another one (COM2?) inside the case, with no
>> connector attached to the header.
>
> Michael is correct. Usually your motherboard will come with an
> expansion bracket to plug into the header.
>
> If you want to roll your own - I don't believe that there is a
> standard header pin arrangement, but a common one (and one that I
> recently used to create a null modem) is to have a header of 10 pins
> (9 of which are important) in the following arrangement:
>
> 1 3 5 7 9
> 2 4 6 8
>
> And you connect them to a DSUB-9 using the same pin numbering (ie. pin
> 1 on the MB goes to pin 1 on the DSUB-9, etc)...
>
> cheers,
> -p
Unfortunately there is no header on the board for a second serial port. It
also only supports one floppy drive. It's some sort of IBM board. eBay
cheapie. I got it to replace my more functionally diverse but very sick
older computer. The whole time I had the old computer it never had a fdd or
hdd controller. I found the board in the computer building holiday cleanout
garbage stack. I used an ISA SCSI controller in it instead.
Anyway, back to the point. Thankyou for providing the pinout though. It was
very nice of you. However I believe the standard configuration is a little
different to that. Remember that the header numbering is in columns and the
connector is labelled in rows.
So...
Header
2 4 6 8 10
1 3 5 7 9
D9
1 2 3 4 5
6 7 8 9
Header to D9
1 3 5 7 9
2 4 6 8
(10 is NC).
I may be wrong on this but I thought that was the way it normally was. D25
wires up nicely too, but not quite as sequential as that. I actually
butchered a PC one a couple of days ago to make a male D25 SSC connector.
Tristan.
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