[cctalk] Re: Looking for bootable floppy image for a PDP11/20

On 1/20/2025 Wayne S wrote: I didn't write the following, I'm just copying what I saved some time ago. It may help you make use of RT11DV50.ISO.zip . -- Ron Subject: RT-11 distribution kits From: Tony <agn...(a)gmail.com> Date: 9/24/2021 A few people have asked me about RT-11 distribution kits. Earlier this year I posted the following to the alt.sys.pdp11 USENET newsgroup. It may be of use to fellow PiDP11 owners... just merge the relevant disks mentioned below into the /opt/pidp11/systems/rt11/boot.ini and boot the CD-ROM (boot rq0) to make a distribution kit. Tony The following is my posting from alt.sys.pdp11 - Just a note that Jerome Fine collected together a set of 24 RT-11 releases (from V01-15 on a DECtape to V05.07 on an RL02 disk) in the form of a consolidated CD-ROM image. You can download the CD-ROM from http://pdp-11.classiccmp.org/RT-11/dists/RT11DV50.ISO.zip If you're using SIMH PDP11 you can access distributions from RT-11 partitions on the CD-ROM using a SIMH ini file like - ; File rt11.ini for SIMH PDP11 set cpu 11/70, 4M set cpu noidle set throttle 10% set dz disable set hk disable set tm disable set rq enable set rq0 cdrom att rq0 RT11DV50.iso ; This is for copying an install disk to a RL02 disk image ; For older versions use DECtape (tc) or RK05 (rk) set rl enable set rl0 RL02 att rl0 RT11V57.dsk boot rq0 ; end of rt11.ini Unzip the CD-ROM from the zip file into an empty directory with the above rt11.ini and start SIMH PDP11 $ pdp11 rt11.ini PDP-11 simulator V4.0-0 Current git commit id: 852c0bc1 Disabling XQ /Users/tony/rt11/rt11.ini-7> att rq0 RT11DV50.iso RQ0: 'RT11DV50.iso' Contains RT11 partitions 4 valid partitions, Type: V05, Sectors On Disk: 242406 /Users/tony/rt11/rt11.ini-13> att rl0 RT11V57.dsk RL0: creating new file: RT11V57.dsk Overwrite last track? [N]Y RT-11XM V05.03 ?LD-W-Unable to update disk copy of LD handler .TYPE V5USER.TXT [snip] Each of the CD-ROM four partitions is available as device DU0:, DU1:, DU2: and DU3:. There are two files on DU0: called README.1ST and README.2ND you should examine for instructions and the layout of the CD-ROM. For example, to make a bootable RL02 disk containing the RT-11 V05.07 installation kit, copy the disk-image file from DU2:RTV5RL.07 to the RL02 media using - .copy du2:rtv5rl.07 /file DL0: /dev DL0:/Copy; Are you sure? Y Output device is larger; Are you sure? Y Now you have the installation disk on the RL02 in drive DL0:. You can now perform an installation by booting this disk - but to do this you should halt SIMH PDP11 and revise the start-up file to add another RL02 device (as rl1), and boot from rl0. See the appropriate RT-11 installation guide for details (installation normally requires two additional RL02 disks - one to make a backup of the installation disk, and the other to make your working system disk). The release notes are at - http://www.bitsavers.org/pdf/dec/pdp11/rt11/v5.7_Oct98/AA-5286M-TC_RT-11_V5… and you can use this in conjunction with the V5.6 documentation at http://www.bitsavers.org/pdf/dec/pdp11/rt11/v5.6_Aug91/ Tony