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Re: IIc + SmartPort behavior

Le 07/11/2011 13:54, Steven Hirsch a écrit :

On 11/06/2011 11:36 PM, Michael J. Mahon wrote:

Steven Hirsch<snhirsch@gmail.com> wrote:



At this point, the primary issue with IIc+ is that it won't boot the
spvhd. Both the IIgs and IIc+ try to access the spvhd a bit before its
firmware comes ready, so you generally need an immediate Oa-Ctrl-Reset
after powerup. Then, you can do PR#5 and boot from the internal 3.5
diskette. When P8 comes up, as many as three virtual disks will be
recognized (assuming you aren't using an ancient ProDOS 8).

I don't consider this any sort of show-stopper and I'm sure Cedric will
sort out the firmware.

Steve


I'm a bit surprised that it doesn't keep mapping logical devices until it
runs out of mappable slots.


Apple's specs claim support for a total of (4) devices on the Smart bus.
That limit appears to be real.
Initialy the SPVHD was limited to 4 virtuals drives, but I pushed this limit up to 10 virtuals drives after a discussion with Geoff Weiss. Prodos 8 2.0.3 seem to be able to map more than 4 devices using all available slots. Nevertheless, some 8 bits applications don't handle nicely so much devices. The devices limitation should be correlated with electrical limitation at the time, and I suppose the maximum number of devices that Prodos 8 can handle evolved to follow hardware evolutions. 

Cedric