Thanks for the help. So far I managed to uncompress the files with the custom version of compress on NetBSD/simh. I then created a .tap file according to the reference in FORMAT. I'm using the following config file for simh 3.0.1: load -r ka655.bin set rq0 ra82 at rq0 ra82.dsk set tq tk50 at tq0 quasijarus0a-dist.tap boot cpu Here's a transcript of the very first attempt of booting off the tape: $ ./vax 43cfg VAX simulator V3.0-1 KA655-B V5.3, VMB 2.7 Performing normal system tests. 40..39..38..37..36..35..34..33..32..31..30..29..28..27..26..25.. 24..23..22..21..20..19..18..17..16..15..14..13..12..11..10..09.. 08..07..06..05..04..03.. Tests completed. (BOOT/R5:0 MUA0 2.. -MUA0 1..0.. = Clearly, stand boots. I'm hopeful that 4.3-Quasijarus0a will indeed run on simh. For some follow-up questions... Standalone format supports hp and up disks, but simh only emulates RL and RQ controllers - which means that the Ultrix utilities to label a cold disk must be ported or recreated to the simh host platform. Of course, it may well be that applying a hex editor to the disk image will suffice. Am I correct that Quasijarus supports RA82 disks (using the ra type) and the TK50 tape (as a tms)? Markus -----Original Message----- From: Michael Sokolov [mailto:msokolov@ivan.Harhan.ORG] Sent: Friday, September 26, 2003 6:47 AM To: jmbw(a)nather.com; tuhs(a)tuhs.org Subject: Re: [TUHS] Re: 4.3 BSD version in the Unix Archive Warren Toomey <wkt(a)tuhs.org> wrote: Yes, for political reasons I needed to make the 4.3BSD-Quasijarus compressor a version of compress, not gzip (can't have any GNU), but I wanted to have the higher compression ratio of deflation, so I created a new version of compress that supports deflation in addition to the original LZW algorith. You can find the new compress in components/compress.tar either on my FTP site or in Warren's archive in the 4BSD area. "4.3BSD-Tahoe Vax distribution" is an oxymoron. Berkeley released the Tahoe tape with Tahoe binaries, no VAX binaries. I was the one who compiled the Tahoe source for the VAX, and the result was 4.3BSD-Quasijarus0. OTOH, you may be referring to the fact that the Tahoe distribution in the archive is broken. Yes, it is. Unfortunately there was an unrecoverable tape read error. Reno This has come up time and again. SIMH's emulation of VAX is too poor. VAX is not an easy architecture to emulate. MS --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com) Version: 6.0.520 / Virus Database: 318 - Release Date: 9/18/2003 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com) Version: 6.0.520 / Virus Database: 318 - Release Date: 9/18/2003