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Re: [N8VEM: 14763] Re: DIY ISA backplane
On most older PC motherboards, the serial port, keyboard and mouse
were on the motherboard, so I see no issue with adding the serial
port(s) to your mother board...on a PC they have for years been well
defined in device address and function.
my two bits..
tom...
On Sat, Sep 29, 2012 at 8:55 AM, Sergey <skis...@gmail.com> wrote:
> I started my work on the MicroATX backplane.
> It looks like it will fit 8 slots - 4 of them completely Micro ATX
> compatible with access from the back side, and 4 are not - they can be
> used for cards that don't have connectors on the back side, or a case
> might be modified to provide required access.
>
> Even after putting 8 slots, and all the logic the board has plenty of
> space (about 1.6"x6" area), and I would like to find a good use for
> this area.
> Here are some ideas, but all have their disadvantages:
> 1. Put two more ISA slots (10 total). Con: But why one would need that
> many slots?
> 2. Implement a UART/serial port. Con: Serial port is usually provided
> by an I/O card, and not many need yet another serial port.
> 3. Use it as a prototyping area. Con: why one would need a prototyping
> area on the backplane
> 4. Don't use that area at all. Con: waste of PCB space
> 5. Make board shorter. Con: not completely ATX compatible. It will fit
> in Micro ATX or ATX case, but will require some spacer to hold the
> upper side of the board. (Note: most likely it will require additional
> spacers anyway, because MicroATX doesn't provide a good support for
> ISA slots in the middle of the board).
>
> Any recommendations?
>
> Thanks,
> Sergey
>
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Tom Lafleur
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