Re: assembling the IIGS system source code (part 2)

[Stavros Karatsoridis <skaratso@gmail.com>]

On Mar 3, 1:02 pm, retrogear <larrygr...@gmail.com> wrote:
> On Sunday, March 3, 2013 10:36:50 AM UTC-6, gid...@sasktel.net wrote:
> > On Saturday, March 2, 2013 11:18:27 PM UTC-6, Steve Nickolas wrote:
>
> > > I wonder if this "Mark Twain" and the "Apple IIsi" are the same?
>
> > There were early comparisons of the 68k mnemonics to the 65816 mnemonics.  It would have been cool if the ROM was close enough that the processor could just be swapped out.
>
> > How does the IISI motherboard look compared to the description of the Twain motherboard?  Are the chips in virtually the same spot?
>
> From the screenshots I've found on the net, the Twain and IIsi boards don't look the same at all. I meant they look the same in the sense of the case and the positions of the hard drive and floppy drive. Interestingly I also found a video of Joe Kohn presenting the Twain and the bios startup reads Apple IIGS at the top, Not Twain 01 which mine does now. BTW - to others reading this, I'm just running a GSPort emulation with a Twain ROM I just assembled.
>
> Larry

Again, the IIsi motherboards are Macintosh boards. There was never an
Apple II with the name IIsi that ever made it to the motherboard
production phase.