Path: utzoo!utgpu!water!watmath!clyde!att!rutgers!apple!bloom-beacon!husc6!wjh12!djb From: djb@wjh12.harvard.edu (David J. Birnbaum) Newsgroups: comp.sys.ibm.pc Subject: Overlays Keywords: overlay Message-ID: <311@wjh12.harvard.edu> Date: 27 Sep 88 21:21:22 GMT Reply-To: djb@wjh12.UUCP (David J. Birnbaum) Distribution: na Organization: Harvard University, Cambridge MA Lines: 23 I am a novice 8088 assembly programmer trying to write an overlay for XyWrite (word processor). The manufacturer sent me a sample dummy program and explained what information is passed in what registers to the overlay. Apparently, the overlay manager is already built into XyWrite; if I write my overlay and call it HYPHEN.OVR (it's a supplementary hyphenation routine) XyWrite will know when to call it. I would be grateful for advice on how to assemble and link this type of overlay. I know how to produce .OBJ, .EXE, and .COM files, but how do I produce an independent overlay file? I can email the dummy program (it's only about 20 lines) along with the information from XyQuest (about one page) to anyone who would be willing to offer advice. Please email replies to djb@wjh12.harvard.edu (Internet) or djb@harvunxw.bitnet (Bitnet). If there's a lot of interest I'll post a summary; otherwise, let me know if you'd like a summary by email. --David J. Birnbaum