Chuck-Staatse@cup.portal.com (02/15/88)
Does anyone know if UNIX supports a "Connect to Interrupt" facillity similar to VMS or RSX. Failing an "Out of the Box" solution, has anyone cobbled something together? Target system is a 68000 VME based system. Any takers?
rbl@nitrex.UUCP ( Dr. Robin Lake ) (02/27/88)
In article <3213@cup.portal.com> Chuck-Staatse@cup.portal.com writes: >Does anyone know if UNIX supports a "Connect to Interrupt" facillity >similar to VMS or RSX. Failing an "Out of the Box" solution, has >anyone cobbled something together? Target system is a 68000 VME based >system. >Any takers? Bill Allen, Alcyon Corp., did a V7-based "real-time" version of UNIX for the 68000. It looked very good 4 or 5 years ago. The system is REGULUS, and now is described as being SV2 compatable. Alcyon Corp. 6888 Naney Ridge Dr. San Diego, CA 92121 (619)-587-1155 This is taken from the 1988 UNIX Products Directory, published by /usr/group. (408)-986-8840 -- Rob Lake {decvax,ihnp4!cbosgd}!mandrill!nitrex!rbl
preece%fang@gswd-vms.gould.com (Scott E. Preece) (03/01/88)
From: " Dr. Robin Lake " <rbl@nitrex.uucp> > In article <3213@cup.portal.com> Chuck-Staatse@cup.portal.com writes: > Does anyone know if UNIX supports a "Connect to Interrupt" facillity > similar to VMS or RSX. Failing an "Out of the Box" solution, has > anyone cobbled something together? Target system is a 68000 VME based > system. > Any takers? ---------- The forthcoming release 2.1 of UTX/32 (Gould's version of Unix) allows you to connect either directly or indirectly to machine interrupts -- a directly connected interrupt attaches user process code directly to the low-level interrupt handler, and indirectly connected interrupt simply causes a specified signal to be sent to the connected processes when the interrupt occurs. Typical times to enter the user's interrupt routine (assuming the interrupt is not blocked) directly is 50-75us on a PN-6000; for an indirectly connected interrupt a context switch has to happen, so the time is order of 500us. [These are ballpark numbers, a proper performance report giving expected ranges is forthcoming.] -- scott preece gould/csd - urbana uucp: ihnp4!uiucdcs!ccvaxa!preece arpa: preece@Gould.com