The IBM world did not begin with the S/360. Except for the late lamented 7030, IBM computers used either a two digit character code or a six bit character code. There was no way to encode more than 100 values on a 650 or 64 values on a 704.
UNIVAC initially used 90 column cards; they never used 96. It was IBM that used 96 column card on the S/3. The assignment of hole combinations is in PoOps and the green card (of some color); I don't recall which editions. Bitsavers is your friend. As for the encoding of 8 bit values to EBCDIC characters, that's all over the landscape. GA27 -2837-9, IBM 3270 Information Display System Character Set Reference is a good starting point; it's not complete or the most recent, but it is available from bitsavers. I don't know whether the big code page manual is available online. -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of Farley, Peter x23353 [peter.far...@broadridge.com] Sent: Tuesday, June 2, 2020 10:43 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Punched cards and character set Radoslaw, In the IBM world, all possible EBCDIC characters (all 256) were possible to punch into physical cards, but punching any characters not on the keypunch machine's keyboard (like lower-case letters) required using the "multi-punch" key (or on older keypunch machines, physically holding the card in place so that punches did not advance the column position) to manually punch the necessary holes in one column. If you sent "object deck" output of the assembler or a compiler to a physical card punch peripheral you could punch all 256 characters into them. It was harder to do from a manual keypunch machine. There were alternate physical card formats for non-IBM environments. IIRC, Univac used a 96-column card with round holes instead of rectangular ones. I saw them once, but never got to work with them. I have been asking Google to find any documentation of the full encoding of punches to EBCDIC characters but haven't found anything relevant yet. Sorry, I don't have any actual JCL on physical punched cards any more. Somewhere in the attic I may have a box or two of blank ones, but nothing with punches. Peter -----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of R.S. Sent: Tuesday, June 2, 2020 10:20 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Punched cards and character set I have never used punched cards, so forgive me my questions. As far as I know, a character set on punched cards was somehow limited, so it is not EBCDIC or similar set of 256 characters. Of course that means some limitations for DD * datasets - if coded on real punched cards. Nowadays I'm pretty sure DD * accept every possible character, as any other dataset (with some exception for delimiter). Note, it is program independent - this is a change within system (JES2, Interpreter, whatever). Q1: how it was in the past? I mean, were the DD * limited to "punched card" character set? Or it was always full EBCDIC if the job was read from DASD? Q2: What about character set on the cards? Was it always one and the same within S/360 family? I noted there were several character sets, but as far as I understand those set was for other machines (Remington, pre-S360 IBM machines, etc.) Was there any name for card character set? I mean something like "CP 037" or so. And another question, or rather kind request: Does anynone have JCL statements on punched cards? I would like to get/download some images of JOB, EXEC, and DD statements on punched cards. I have a lot of card pictures, but none with JCL. -- This message and any attachments are intended only for the use of the addressee and may contain information that is privileged and confidential. If the reader of the message is not the intended recipient or an authorized representative of the intended recipient, you are hereby notified that any dissemination of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail and delete the message and any attachments from your system. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
