On 05/21/2017 01:02 PM, Al Kossow via cctalk wrote: > > On 5/21/17 8:51 AM, Rob Doyle via cctalk wrote: > >> How 'bout a brand new J11-based board for oldie S-100 systems? > Reinventing incompatible I/O for existing operating systems. > > Maybe if they wrote a new unencumbered OS, but I'm not holding my breath.
Its a PITA for even simple os like RT11. > I don't get why they abandoned their original Eurocard form factor for > something truly > braindead. S100 fits everthing, even if not well. > Linear regulators on every card is stupid in the era of high efficiency > switchers. Its the BUS.... Switchers back then were expensive and not efficient, nor quiet. back then they were large too. It also meant a better buss structure to distribute 5V without undue voltage drop. It is why DEC Qbus is only so large before they went BA123 with two power supplies. Ever heard a DEC H780 sing, loudly! Your critical of tech as it was. In the end S100 was the cheap way for the day not expecting to become a monster system that they tended to become. I have a s100 box I made up without them and its a pain to use boards across systems without mods. Systems I do now don't need S100, SS50, or Multibus as I can put all that on one small card. > Now he's talking about Multibus, so he can use all of those 8" SMD disk and > Pertec tape controller boards. Maybe my boxes of that junk will be worth > something now. > Multibus was nicer and cleaner but in the end one multibus card can hold an entire system now and be big and clunky. Allison
