PDP-11 Freeware CDs for RSX-11 and RT-11 (OriginallyProduced by Tim Shoppa)

Jerome Fine replies: There are 3 CDs: (a) RT-11 with BOTH an ISO9660 and an RT-11 file structures The ISO9660 portion 21,223 files / 969 directories / 403,733,960 bytes The CD full image is 671,088,640 bytes which is 65,536 * 20 blocks or exactly 20 RT-11 partitions with the first portion being files under the ISO9660 files structure and the last 7 RT-11 partitions holding files with each of those 7 partitions having the necessary RT-11 file structure The files under the ISO9660 file structure can be accessed via any operating system which can. Both E11 and SIMH are usefully able to "MOUNT/ATTACH" all of the individual files that have an internal RT-11 file structure On a PC using Windows 98 SE, I have tested the E11 command MOUNT DU0: CDROMa:/RONLY where "a" is the drive letter which allows all 7 non-zero RT-11 partitions to be used directly under RT-11 (as are all the other non-zero RT-11 partitions fully available), BUT E11 can NOT see for RT-11 partition zero the first 64 blocks (of 512 bytes each or 16 CD sectors of 2048 bytes each - which is NOT either a problem or relevant since under the RT-11, they are all zero as there is NO RT-11 directory structure for RT-11 partition zero) In addition, the "Full" (Commercial) version of E11 allows the command MOUNT DU0: SCSIn:/RONLY were "n" is the SCSI ID which also allows all 7 non-zero RT-11 partitions to be used directly under RT-11 AND if a user has a SCSI CDROM drive on a real PDP-11 which SUPPORTS 512 byte access, then a real PDP-11 running RT-11 can also directly use those same 7 non-zero RT-11 partitions along with all of the other 13 partitions which is not relevant since none of them have an RT-11 file structure (b) RSX-11 with an ISO9660 file structure The ISO9660 file structure 55,093 files / 2040 directories / 528,559,136 bytes The CD full image is 610,842,624 bytes The files under the ISO9660 file structure can be accessed via any operating system which can. Both E11 and SIMH are usefully able to "MOUNT/ATTACH" all of the individual files that have an internal RSX-11 file structure (c) RSX-11 with an RSX-11 file structure or so I have been told The CD full image is 665,600,512 bytes I have never used this CD, but I imagine that SIMH can't at all and the hobby (demo) version of E11 would have difficulty using this CD under Windows 98 SE because the first 64 blocks are NOT available BUT, under the "Full" (Commercial) version of E11 the command: MOUNT DU0: SCSIn:/RONLY where "n" is the SCSI ID can use this CD with the RSX-11 file structure AND if a user has a SCSI CDROM drive on a real PDP-11 which SUPPORTS 512 byte access, then a real PDP-11 running RSX-11 can also directly use this CD. I have only used the RT-11 CD. I am not sure how I would "dd" them, but I guess I could also provide the *.bz2 files on a separate CD as well - they would easily all fit on one CD. Then, as required, these compressed versions can be expanded using bzip2.exe and checked with MD5.exe for the MD5 value. Then, while SIMH can open these very large files, the hobby (demo) version of E11 can NOT do so. However, the "Full" (Commercial) version of E11 is able to do so. Sincerely yours, Jerome Fine -- If you attempted to send a reply and the original e-mail address has been discontinued due a high volume of junk e-mail, then the semi-permanent e-mail address can be obtained by replacing the four characters preceding the 'at' with the four digits of the current year.