Re: [N8VEM: 14763] Re: DIY ISA backplane

[Tom Lafleur <laf...@lafleur.us>]

also, if you use a DB9 connector, one could substitute a FDTI
DB9-USB-M converter, giving us access via USB



On Sat, Sep 29, 2012 at 9:18 AM, Tom Lafleur <laf...@lafleur.us> wrote:
> 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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>
>
>
> --
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>
> Tom Lafleur
> (858) 759-9692



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Tom Lafleur
(858) 759-9692