Stefano Fronteddu wrote:
>
> Hi to all of You,
> read the following and answer to all of the questions if you can, as soon
> as possible !
> I've got a MSX2 NMS8280 by Philips. I'd like to know what are the voltages
> of power supply.
> With my tester I've found
>
> +12 ? ? -12
>
> What are the right value that I can't found ?
I own a nms8255, I guess the powersupply connector is the same; it is as
follows:
Red: +12V
Blue: +5V
Black: Ground
Yellow: -12V
>
> Is there anybody that is able to send me the electrical schemas of my
> NMS8280 ? I need any kind of information about this machine, any schema, I
> need this information as soon as possible because I have to repair my MSX. I
> need it working again !
>
> Moreover I know that there is someone (in russia I think) that have put
> NMS8280 motherboard in a PC case.
> Is there a way yo use PC power supply with my NMS8280 motherboard ?
I've also built my 8255 in a pc case. It uses the pc power supply; I
made a special 'transition' connector for it. Be careful with it because
the colours aren't the same:
Both PC power connectors are marked 'P8' and 'P9'. You don't need P9. P8
is as follows:
Black: ground
Black: ground
Blue: -12V
Yellow: +12V
Red: +5V
Orange: (I don't know, I think it is something that indicates 'Power
Good')
So P8 delivers all signals you need.
BTW to power the floppydrives you can use the
'pc-power-floppydrive-connectors'. Of course it is also possible to use
modified 1.44MB floppydrives instead of the orignal not-standard-sized
floppydrives that are probably not working properly anymore these
days...
Greetz,
Jon
PS. If you want to see it: come to Tilburg fair :-), I plan to take my
MSX along (Compjoetania TNG).
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