Various kinds of System reloads 2358

Peter Flbutt

cp67 (and vm370) was even simpler. the txt decks (output from the buttembler) were bundled together and booted from cards using a card loader from BPS (basic progamming system ... about the most primitive of the systems for s-360). when the BPS loader had gotten everything into memory image ... it transferred control to cpinit. cpinit wrote a page formated image (of what had just been loaded into memory) to disk ..... and then wrote the necessary wrote the necessary disk boot-ipl records to read cpinit back into memory.

on disk boot-ipl, cpinit would be read back into memory ... it would recognize that it was being loaded from disk (rather than in the earlier bps loader p;rocess) and reverse the earlier process of page block i-o for the kernel image ... this time doing reads instead of writes. once the kernel image was back into memory, it would then do the cold-warm(-ckpt) process for spool file system. after that it would transfer control to normal kernel operation.

my modification for doing the automated benchmarking was one of the last things invoked by cpinit process before transferring control to standard kernel processing (cpinit in vm370 was renamed dmkcpi)

this auomated startup procedure was released as part of the standard product.

random past posts mentioning bps loader: ** questions would you ask? Re: Itanium benchmarks ... MF's ? (poll) ending characters begin? boundary boundary Ritchie!!! REALLY OT! Overuse of symbolic REALLY OT! Overuse of symbolic constants addressing information be: in tags and descriptors information be: in tags and descriptors

random past posts mentioning having redone os-360 stage2 sysgen: (Questions about OS-360) Intel's 64-bit strategy warning) warning) is an MVT ABEND 422? multi-programming than modern crap ! program-Exec Re: DOS-360: Forty years) if... :-) V3.8 parallel x86 design