On Tue, 19 Feb 2019 at 16:24, Paul Gilmartin <0000000433f07816-dmarc-requ...@listserv.ua.edu> wrote: > > On Tue, 19 Feb 2019 14:47:03 -0500, Steve Smith wrote: > > >Bit 32 is pervasively used as a flag, most typically the end of a list. As > >far as the hardware goes, it is ignored for addressing. I'm not going to > >bother looking up the DEVTYPE specifications, but I believe it has a > >variable-length parm list. So it would have reason to care. > > > ITYM bit 0. VL is not supported for 64-bit parameter addresses.
> Bits are numbered from left-to-right. The high-order bid is always bit 0. Bit 32 of a 64-bit address or more generally, field, is bit 0 of the rightmost 32 bits of that field. These days with a lot of reading of the POO one gets used to their pervasive 64-bit terminology. Tony H. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
