There is no "S/360 normal cycle time"; each model has its own processor and storage timings, with a few duplications, e.g., 65 and 67. The core storage on the 360/65 and 360/75 had a cycle time of 750 ns, except for LCS. Bitsavers has the functional characteristics if you want to check other models.
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Assembler List [[email protected]] on behalf of [email protected] [[email protected]] Sent: Thursday, June 4, 2020 8:53 PM To: [email protected] Subject: Re: Convert *signed* EBCDIC to packed decimal On 2020-06-05 07:35, Seymour J Metz wrote: > Yeah, 8 microsecond instead of .75 microsecond. The S/360 normal cycle time was 2 microseconds. > -- > Shmuel (Seymour J.) Metz > > ________________________________________ > From: [email protected] [[email protected]] > Sent: Thursday, June 4, 2020 5:28 PM > To: IBM Mainframe Assembler List > Cc: Seymour J Metz > Subject: Re: Convert *signed* EBCDIC to packed decimal > > On 2020-06-05 03:45, Seymour J Metz wrote: >> I remember $.25/bit, but don't recall what year that was; too low for >> 1960, too high for 1969. > > Don't forget that there were two types of core memory for > the S360 -- > LCS used a product from India, with a much slower cycle time > compared to IBM's normal memory.
