Bit 32 is the bit formerly known as bit 0, when registers had only 32 bits.
DEVTYPE doesn't do AMODE 64, and so the lack of flag room in a 64-bit address doesn't apply. sas On Tue, Feb 19, 2019 at 4:24 PM 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. > > From: > https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.3.0/com.ibm.zos.v2r3.idai200/da6i2316.htm > VL > causes the high-order bit of the last address parameter in the > macro expansion to be set to 1. > > Bits are numbered from left-to-right. The high-order bid is always bit 0. > > -- gil > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > -- sas ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
