> > > > ...the normal ports on the ASIC are going to > > > > be used as "transfer ports" -- ie they don't access the chips direct > > > > any more, but get stuffed into latches for the appropriate other > > > Good stuff. I was wondering how you were intending to cope with that without > > > any s/w traps. > > *winks* well, now you know :) > This will slow down I/O in SAM mode very slightly tho, won't it? Not > noticeably, maybe, but anything which is extremely timing critical or very > heavy on I/O might suffer slightly (?)
Believe it or not, but as the Z80's we're going to use are going to be running at 20Mhz, IO may be slightly *FASTER* :) > I think DOS in ROM is essential, it's uncontended, can't be accidentally (or > deliberately) overwritten so it's much more stable (provided the program > itself is stable in the first place, of course) and doesn't use up any RAM. > Simple patches can be done without replacing the chip, provided it's written > nicely enough and only a major overhaul requires a replacement chip. Yeah :) > > > With standard sound outputs, instead of a DIN plug? (please...) > > > > Well... both probably... in the PC case version, that is... we're > > thinking of doing a version that you can plug your SAM into the back > > of (note the way I mean that :) :) :) ) > > Hmm. Interesting. Why would you want to, tho? Well.... as an upgrade for existing users, of course :) SI +----------------INTERNET: [EMAIL PROTECTED] | When walking a tightrope made of razor-blades, be very careful -- | | you won't be able to grab hold of it if you fall. (Si Cooke, '94) | +------------------JANET: [EMAIL PROTECTED]
