You are right. I keep forgetting how bad my memory is. It was 121 I was thinking of. This is from MVS Diagnosis Reference.
SVC 121 (0A79) VSAM macro - is type 1, gets LOCAL lock. Calls module IGC121. GTF data is: R15 Contains the pointer to the buffer control block. R0 Contains the pointer to the place holder entry, used for a record management request. R1 Contains the pointer to the IOMB (VSAM I/O management control block). Lennie -----Original Message----- From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Seymour J Metz Sent: 24 March 2022 19:25 To: [email protected] Subject: Re: Actual Block Processor I doubt that there was an SVC entry point for it,and 120 is either GETMAIN or STORAGE. -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List [[email protected]] on behalf of Lennie Dymoke-Bradshaw [[email protected]] Sent: Thursday, March 24, 2022 11:19 AM To: [email protected] Subject: Re: Actual Block Processor Wasn't that SVC 120? Or possibly part of it. Do those components you mention use the media manager (another component that is not well documented to mere mortals)? Lennie Dymoke-Bradshaw https://secure-web.cisco.com/1IPKOx1dWEkm-sDWVb0kJrGU8RAVD8BMD9ssszjlsTVyj_h gOm_f8trwna7Mq0BwljhdjHr3RaKZb1Lei3DvW0U-hWLnf4YKo-Tx_cpGfRBkoI9Fp9JQKhfJxUo n4wEBzbYY1QMYssH-80J-dB-Nn0cItolQPmQIDfiFyGjaeZmoakvj5oh80NK8GT4IJTCdBM31Xd4 Lv3zUvCfarkBwkNNJ3jWU2i0kNmFtOynSheImq9RMyKq7IbwmHupzfbDSWE4Xjq6mL7vGAMzR6wN 9xkvzRW3BlV3s7w0r1TEFHilIZNlFk_P5UwGk15YR5DZ_NHGsAZxA2m7VlxRh-EvIipsleKxI2Ng 9Cr84y80lF5SyNwlISWgNauiGLFh3qWpXwGZhM1vQjbZFlRAznVK4EzIM6GAsSq0a-HEHBXzmP3x ZPrHwEPG-Nt9dQ5GZ1GZCe/https%3A%2F%2Frsclweb.com 'Dance like no one is watching. Encrypt like everyone is.' -----Original Message----- From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Seymour J Metz Sent: 24 March 2022 14:10 To: [email protected] Subject: Actual Block Processor There used to be an MVS component called Actual Block Processor that did low level I/O for CI-formatted data. IS there an equivalent routine in z/OS used by, e.g., HFS, PDSE? If so, is there a source that I can cite in Wikipedia? -- Shmuel (Seymour J.) Metz https://nam11.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmason.gmu.e du%2F~smetz3&data=04%7C01%7Csmetz3%40gmu.edu%7C72307993d1554d0abae808da0 da9c69b%7C9e857255df574c47a0c00546460380cb%7C0%7C0%7C637837320075972375%7CUn known%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJX VCI6Mn0%3D%7C3000&sdata=4E5j5FO3xlrE3LcIza7hd0n6wXnHbQwTubViOQ3weDU%3D&a mp;reserved=0 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
