68010 (was Re: Mac IIci)

--- Gooijen H <GOOI(a)oce.nl> wrote: I suppose it's all a matter of semantics - different stack frames vs. different amounts of bytes pushed on a bus error... I'd quote chapter and verse, but I forgot to dig out my 68K manuals last night. Same for the Amiga, except no patch required for Kickstart/AmigaDOS 1.2 and up (I forget about 1.0 or 1.1). The one way to prove you had a 68010 in your Amiga was to run the old calc program - it did a MOVEcc instruction which is privved on the 68010. There was an optional patch that would intercept that trap and emulate the instruction, but since you weren't supposed to execute that instruction directly (there was an approved way of doing it), the patch wasn't required for ordinary operation. Yep. We got to reuse all of our expensive 68000 diagnostic hardware when we made a 68010 design (building a pin-swabber for our one and only 68008 design was a pain and some stuff didn't work right, but it was good enough for the task at hand). Cool. Yep. Nice. That'd be cool to see in person. I have been kicking around a similar project since 1987 - mine was two seats, more like a Space Shuttle flight sim, made from scrapped DEC RK05 shells (the innards had been cleaned out by me for spares at work, at direction of my boss). The guts of what I had finished were two 9" PETs for display, and a single 12" 80-col PET. Nice stuff, but I ended up putting the PET guts back in the PETs. They became too useful to squirrel away in a sim cabinet. These days, I'd use commodity hardware. Still have the shells - but they are dismantled and stacked in the attic. :-( -ethan __________________________________________________ Do You Yahoo!? Send FREE video emails in Yahoo! Mail! http://promo.yahoo.com/videomail/