> XT/370 and AT/370 used a 68000 with custom microcode and a second > 68000 with standard microcode. The software for it was VM/PC. > > Note that the later P/370 and R/370 cards implemented the full > architecture and ran stock operating systems.
re: http://www.garlic.com/~lynn/2012l.html#72 zEC12, and previous generations, "why?" type question - GPU computing http://www.garlic.com/~lynn/2012l.html#74 zEC12, and previous generations, "why?" type question - GPU computing between xt/at/370 and p370/p390 was a74 (7437) done in POK by the same group that had done the 3277GA (i.e. large tektronics graphics tube that plugged into side of 3277 terminal) ... "a74" was their POK dept. I got con'ed into making the vm370 modifications for them ... including a74 only supported 4k storage key. this is long-winded post ... with bunch of old a74 press at the bottom http://www.garlic.com/~lynn/2002d.html#4 IBM Mainframe at home post with some of the discussion of the vm370 changes I did for a74 http://www.garlic.com/~lynn/2003f.html#56 ECPS:VM DISPx instructions old internal A74 email on the announcement of a74 http://www.garlic.com/~lynn/2000e.html#email880622 in this post http://www.garlic.com/~lynn/2000e.html#56 Why not an IBM zSeries workstation? a74 was 350kips (370, compared to 100kips for xt/at/370) and the ROMAN chip set was 168/3mips ... mentioned in previous post. -- virtualization experience starting Jan1968, online at home since Mar1970 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
