On Thu, 22 Jun 2000 09:57:41 -0300, Leonard Silva de Oliveira wrote:
> No , It's not unlogical, because V9958 is an internal pehiperal and
>is controlled by S1990. If you plug another VDP on the same port using
>the external slot you will be able to write any data to it, but if you
>try read the vram you will get the vram contents of the internal V9958.
> Simple , don't it? (Yeah ... I really tested it and it went as I said.)
> I guess read to external mapper registers are blocked by the same
>reason
>that other ports are blocked. If you look at T-R schematics you will
>notice that S1990 does all buffering for the slots and also
>controls the mapper register. That should de the only explanation
>for the hardwired prohibition to read the external slots on the ports
>that already have devices latched internally...
Great God! How lame was Panasonic when designing TR!!!
----- Abra�OS/2, Daniel Caetano ([EMAIL PROTECTED])
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util!
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