Are there any #MC68000 #mc68k gurus in the audience?
If a program running in usermode accesses the vectors via a data access instruction - what does the 68010 indicate on the function code pins?
Are vector reads escalated to being supervisor code/data reads, even though the code which triggered them is user-mode?
I'm trying to figure out why dereferencing a null pointer is 'fine' on a real #UnixPC but causes problems with the FreeBee emulator (if I disable vector access promotion).
AT&T's The Unix Connection
https://toobnix.org/videos/watch/8b3c8623-54e9-439b-9d1d-869f6654aa0a
#RMC - The Forgotten #Commodore900, we look at a #Rare #Prototype
Amazing. I have never come across this machine at all. A #Commodore machine running #UNIX would have been a sight to see.
https://www.youtube.com/watch?v=PbVjNInzrw8&ab_channel=RMC-TheCave
#CBM #RetroComputing #16Bit #16BitComputer #16BitComputers #16BitMachine #16BitPC #UNIXPC #1980s #80s
@mike805 I also collect old computers :). That's an AT&T 3b1 on top. AKA the "Unix PC"
The Netgear switch will go away pretty soon. It's just too noisy. The little switch will replace it. (also the netgear is not POE).
Here's my #throwbackthursday contribution. This was my bedroom in 1988.
The large rack contained my #pdp11 34, with an RL02 drive under it. In the corner is an ATT #3b1 (aka #unixpc), with an old #mac next to it.
The thing I really miss is the #dec #gigi terminal in the middle. Very hard to find now. It was a graphics #vt100 compatible terminal.
The PDP11 ran #rsts. There's 2 more racks full of hardware for it off to the left. Was like being next to jetliner when it was running.
RT @brouhaha@twitter.com: @doctorow@twitter.com The AT&T 7300 Unix PC was much better. MC68010 processor, System V Release 2 Unix. Developed by Convergent for AT&T. Later version with higher capacity HD was the AT&T 3B1.
#UnixPC
