The Assembler I used in 1966 ran in 8K under BPS/360 on a model 30. It had LOTS of restrictions. I sort of remember that instruction names and storage field names had to be no longer than six characters. And it took two passes through all the cards to complete the assembly process.
Bill Fairchild -----Original Message----- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of Lloyd Fuller Sent: Tuesday, July 20, 2010 10:09 AM To: IBM-MAIN@bama.ua.edu Subject: Re: History of Hard-coded Offsets (Was: TSSO problems) Remember: there used to be several levels of assembler: D, E, and F as well as H. D and E in particular had lots of restrictions on what MACROs and COPYs could do because of lack of memory. I believe D would run in a 64K real machine and E required 96K machine. Lloyd ----- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
