Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/5/84; site nsc-pdc.UUCP Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxt!houxm!mtuxo!mtunh!mtung!mtunf!ariel!vax135!cornell!uw-beaver!tektronix!reed!nsc-pdc!mark From: mark@nsc-pdc.UUCP (Mark Nudelman) Newsgroups: net.micro.16k Subject: Re: Query about interrupt/trap handling Message-ID: <218@nsc-pdc.UUCP> Date: Wed, 26-Jun-85 14:00:04 EDT Article-I.D.: nsc-pdc.218 Posted: Wed Jun 26 14:00:04 1985 Date-Received: Fri, 28-Jun-85 01:09:02 EDT References: <1179@sjuvax.UUCP> Distribution: net Organization: NSC Portland Development Center, Portland Oregon Lines: 13 > In the manuals, I see no indication as to whether traps/interrupts are > processed in user mode or supervisor mode. Traps/interrupts are indeed processed in supervisor mode. My reference: 32000 Instruction Set Manual, section 6.2: "General Interrupt/Trap Sequence": "1. Adjustment of Registers. .... A copy of the PSR is made, and the PSR is then set to reflect Supervisor Mode and selection of the Interrupt Stack." Mark Nudelman nsc!nsc-pdc!mark National Semiconductor tektronix!reed!nsc-pdc!mark