>Andrew Strouse wrote:
> I think I am interested in these CDs. I have a few questions though. I
> apologize in advance for any "newbie" questions. Can I use these CDs with
> E-11 or simh? Also how many different CDs are you creating? (If you order 3
> are they all the same?) Also, can you paypal? (I would be willing to add a
> service charge if you can.) Thanks for any answers you can provide.
> Andrew Strouse
> ( kittstr_at_access-4-free.com )
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.
>Zane H. Healy also wrote:
>I'm not sure about E11, but with SIMH, you should be able to 'dd' them to a
>disk image, and access the RT-11 formatted portion of the RT-11 CD from RT-11
>and the ODS-1 formatted RSX-11M/M+ CD from RSX-11M/M+.
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
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Received on Sat Apr 26 2003 - 23:26:00 BST