Serial lines and v6 ...

Having given up trying to work out why v6 runs on my /34a, and v5 doesn't, I've turned my mind to the problem of trying to get a second DL11 up and running so I can use a terminal as well as my trusty teletype. I've set up a second DL11 on CSR address 176500, vector 300. This device is set for 96008N1, for what it's worth, and works just fine under RT11. I rebuilt the v6 kernel to enable a second DL11 interface. I have no guide to the source, so all this is based on my guesswork. Needless to say, it doesn't work, and I'm now out of ideas: Modified /usr/sys/dmr/kl.c, the KL/DL-11 driver source. I'm assured that the KL11 is an ancient serial interface ... Extract from said file ... /* base address */ #define KLADDR 0177560 /* console */ #define KLBASE 0176500 /* kl and dl11-a */ #define DLBASE 0175610 /* dl-e */ #define NKL11 1 #define NDL11 0 #define DSRDY 02 #define RDRENB 01 I simply changed the number of KL11's from one to two: #define NKL11 2 A further comment in the code says: * set up minor 0 to address KLADDR * set up minor 1 thru NKL11-1 to address from KLBASE * set up minor NKL11 on to addresss from DLBASE What this is saying is that minor 0 will be 0177560 (my console, which works fine), minor 1 will be 0176500 (which should be my second DL11). The code even does what the comment says ... ;) So I rebuild the kernel, reboot. Now, /etc/mknod /dev/tty1 c 0 1 makes the device, and echo Hi >/dev/tty1 gives: /dev/tty1: cannot create What is up? Naturally if I set up a login for that terminal by editing /etc/ttys, the process loops and causes a great deal of disk thrashing. Something is clearly up with the configuration of the device drivers here ... Does anyone know how I'm supposed to do this properly? Advice and guidance would be much appreciated ... ********************************************************************* On a completely different note, would someone be so kind as to give me the source for a very small Bourne shell and accompanying utilities (/bin/test etc...) that I could port to v6 without too much difficulty? ********************************************************************* Thanks, Bob. -- ---------------------------------------------------------------------------- Robert Manners Osney Laboratory rjm(a)swift.eng.ox.ac.uk Dept of Engineering Science University of Oxford 01865 288762 Try: http://swift.eng.ox.ac.uk Linux - the only choice "Wall Street or Crack Dealer Avenue, the last routes left to the American Dream" - Jello Biafra ---------------------------------------------------------------------------- Received: from mail.crl.com by minnie.cs.adfa.oz.au (8.6.8/8.3) with SMTP id BAA07165; Sat, 2 Dec 1995 01:12:02 +1100 Received: from crl10.crl.com by mail.crl.com with SMTP id AA20411 (5.65c/IDA-1.5 for <oldunix(a)minnie.cs.adfa.oz.au>) Fri, 1 Dec 1995 06:10:08 -0800 Received: by crl10.crl.com id AA04477 (5.65c/IDA-1.5 for oldunix(a)minnie.cs.adfa.oz.au) Fri, 1 Dec 1995 06:03:51 -0800 Date: Fri, 1 Dec 1995 06:03:50 -0800 (PST) From: "Danny R. Brown" <sysyphus(a)crl.com> To: oldunix(a)minnie.cs.adfa.oz.au Subject: Followup to compiling BSD2.11 w/Deqna Message-Id: <Pine.SUN.3.91.951201055825.4424A-100000(a)crl10.crl.com> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Uh, sorry... I rebuilt the unmodified GENERIC kernal. It also terminates abnormally, same point, same message. I'm going to sleep for a while and then go out and buy another Unix book. ************************************************************************* * A Personal Message from * BASILISK * * Danny R. Brown * "Try our other fine flavors!" * * ( sysyphus(a)crl.com ) * (404) 392-1691 * * Pager:(404)397-0516 * LYNC host mode * ************************************************************************* Received: from wlv.iipo.gtegsc.com by minnie.cs.adfa.oz.au (8.6.8/8.3) with ESMTP id PAA08538; Sat, 2 Dec 1995 15:13:32 +1100 Received: (from sms@localhost) by wlv.iipo.gtegsc.com (8.6.10/8.6.12) id UAA17751; Fri, 1 Dec 1995 20:05:36 -0800 Date: Fri, 1 Dec 1995 20:05:36 -0800 From: "Steven M. Schultz" <sms(a)wlv.iipo.gtegsc.com> Message-Id: <199512020405.UAA17751(a)wlv.iipo.gtegsc.com> To: oldunix(a)minnie.cs.adfa.oz.au, sysyphus(a)crl.com Subject: Re: Followup to compiling BSD2.11 w/Deqna Hello - That is strange. The GENERIC kernel should build with no problems - efforts were made to keep the Make.* files in /sys/conf in sync with the GENERIC system. Alas, it sounds like I didn't keep the template Makefiles current enough ;-( I doubt there are any books out there that know anything about overlays - it's a a lost art from what I've seen. I'll follow up with a mini tutorial on how to build a kernel. One note for now: it is 99.999% certain that after configuring a non-GENERIC kernel you will get a size error from the linker and you will have to adjust the overlay layout in your kernel build directory. Steven Schultz sms(a)wlv.iipo.gtegsc.com