Re: Does anyone need IDEfile PCBs?

[David Wilson <mcs6502@gmail.com>]

On Jul 31, 4:55 pm, mdj <mdj....@gmail.com> wrote:
> 32MB, but only one device: The later SmartPort firmware interface is
> an extension of the original ProDOS Block Device interface defined for
> the ProFile (assumedly back in the SOS/Apple III era). SmartPort adds
> unit numbers and control commands (to unit number 0, the SmartPort
> interface itself). The last iteration, Extended Smartport, allows
> larger than 32MB volumes, and supports the long addressing modes of
> the 65816 in the IIgs.

Standard SmartPort (IIc, IIe+Liron card etc) supports 24 bit block
addressing (2^9 bytes/block * 2^24 blocks = 2^33 bytes = 8GB) but the
ProDOS interface restricts you to 32MB).

I think Extended SmartPort increases this to 32 bit block numbers as
well as long (24 bit) memory addressing.