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Xref: sserve comp.sys.intel:5959 comp.os.386bsd.misc:490 comp.periphs.scsi:11870 Newsgroups: comp.sys.intel,comp.os.386bsd.misc,comp.periphs.scsi Path: sserve!newshost.anu.edu.au!munnari.oz.au!news.Hawaii.Edu!ames!haven.umd.edu!uunet!pipex!sunic!ugle.unit.no!ugle.unit.no!jarle From: Jarle.Greipsland@idt.unit.no Subject: Adaptec AIC6260 SCSI-chip, Intel PC and 386BSD Message-ID: <JARLE.93Jun21180333@storlind.idt.unit.no> Sender: news@ugle.unit.no (NetNews Administrator) Reply-To: jarle@idt.unit.no Organization: Free Hardware Foundation, UnLtd. Date: 21 Jun 93 18:03:33 Lines: 29 Hello, I'm considering purchasing an Intel PC box (Professional workstation/GX). The technical product summary says that there is an AIC6260 SCSI-controller (from Adaptec) integrated on the motherboard, and that the BIOS' low level drivers are Adaptec-152x compatible, i.e. they use programmed I/O, no DMA. Intel claims this is faster; no doubt measured under DOS. However, from the BIOS setup and an EISA configure utility program it seems that the controller is connected in such a way that it can request both interrupts and DMA transfers. I am planning to run 386BSD/NetBSD on this box and would therefore like to know: a) Has anyone used this box with 386BSD and SCSI-devices? If so, did you use the Adaptec-drivers in the kernel (154x/174x-compatible) or did you write your own drivers? b) What are the capabilities of the AIC6260 chip? Given that it can request DMA (arbitrate for the bus?), what kind of performance can I expect? Can it perform DMA-transfers to memory regions above 16M? In case I have to program my own low level SCSI-driver, is it easy to program the chip? c) Any other comments on the chip/adapter (or the box itself for that matter)? Hoping for some NetWizdom, -jarle ---- James Bond asked his AT&T representative for a source license to "kill".