[zxspectrum] sempre per i ramsoftiani....

mi sono risposto da solo alla domanda...

da http://freespace.virgin.net/aland.pearson/speccy/plusD/PlusDPal.html :

Sometimes even clever people make mistakes...! On page 4 where it is talking about the Plus D I/O ports the following is wrong :

Port 0xE7 - b2,b3, and b5 are NOT used in the Plus D. The Plus D is hardwired for Double Density drives, the ROM banks can't be selected and it doesn't have a through port for ext select.

The Plus D is NOT paged in at address 0x028E (spectrum keyscan) or 0x0000 when the spectrum is reset. This only happens on the Disciple.

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