>If that is so, then is it still true that one engine is often dedicated to dealing with interrupts?
At least one. You can have up to three (pre-z9), depending on how many CP's are active. I was told three; I have never had more than two. (I have never had more than 10 CP's, either). SAP - Service Assist Processor Originally called: IOP Originally stood for I/O Processor. Changed to Integrated Offload Processor (ES/9000 Series), changed to SAP with the 9672. Truly, the first specialty engine. Introduced on the 308x, IIRC. - -teD I’m an enthusiastic proselytiser of the universal panacea I believe in! ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
