On Mon, 30 Mar 2020 00:27:52 +0000, Seymour J Metz wrote: > >I wouldn't expect novices to be using OPENJ, or even to know what a DCB exit >list is. > We didn't use OPENJ; we did use DCB OPEN exit to supply default attributes. At the advent of SDB I wondered why that didn't exist around 1965. Lots of gyrations to switch to AMODE 24 for access methods, and restore caller's AMODE without program check on 370.
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