Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10 5/3/83; site intelca.UUCP Path: utzoo!watmath!clyde!akgua!sdcsvax!sdcrdcf!hplabs!intelca!kds From: kds@intelca.UUCP (Ken Shoemaker) Newsgroups: net.micro.pc Subject: Re: Detection of the Math Co-processor Message-ID: <414@intelca.UUCP> Date: Tue, 25-Sep-84 16:06:25 EDT Article-I.D.: intelca.414 Posted: Tue Sep 25 16:06:25 1984 Date-Received: Sat, 29-Sep-84 09:26:39 EDT References: <206@gitpyr.UUCP> <404@intelca.UUCP> <227@gitpyr.UUCP> Organization: Intel, Santa Clara, Ca. Lines: 17 If you read AP113, "Getting Started with the Numeric Data Processor," Feb 1981 (also in the 1984 Microsystems Component Handbook, volume 1, pp 3-1,3-61). Figure 6 shows just what you want, as it says "This code will always recognize an 8087 independent of the TEST pin usage on the host." It does just what you ask, showing an instruction that is "self synchronizing," i.e., the 8087 is guaranteed to grab the bus immediatly after the instruction is executed so that the data value placed in memory by the 8087 can be reliably examined without issuing the WAIT. -- I've got one, two, three, four, five senses working overtime, trying to take this all in! Ken Shoemaker, Intel, Santa Clara, Ca. {pur-ee,hplabs,amd,scgvaxd,dual,idi,omsvax}!intelca!kds ---the above views are personal. They may not represent those of Intel.