From mboxrd@z Thu Jan 1 00:00:00 1970 From: cdl@mpl.ucsd.edu (Carl Lowenstein) Date: Mon, 3 Mar 2003 09:38:23 -0800 (PST) Subject: [pups] CDROM drives and PDP-11s Message-ID: <200303031738.JAA01869@opihi.ucsd.edu> > From: "Ian King" > To: "Gregg C Levine" , > Subject: Re: [pups] CDROM drives and PDP-11s > Date: Thu, 27 Feb 2003 08:52:54 -0800 > > John Wilson's PUTR program might be jut the tool - http://www.dbit.com. I'm > guessing it might be ODS-2; worst case, I have an InfoServer that can read > that, and a TK-50 I could dump it to... :-) -- Ian > ----- Original Message ----- > From: "Gregg C Levine" > To: > Sent: Wednesday, February 26, 2003 11:46 PM > Subject: [pups] CDROM drives and PDP-11s > > Hello from Gregg C Levine > Here's the problem. I have several CDs containing programs, and such > like from Tim Shoppa. Two of them say they contain portions which are > readable only by a CDROM Drive attached to a PDP-11. One of them is > split in half. Half is readable on either of the two computers here, > the other half, is in a format that's native to the PDP-11. The other > is all in that proprietary format. So, has anyone managed to get them > read to their machines? Or failing that to the appropriate simulators, > or even emulators? Any suggestions? When I look at "readme.txt" on my RT11 disk from Tim Shoppa I find the following paragraph: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - The second part of the disk is seven RT-11 partitions. Each is a 65536 block RT-11 device that is accessible on a PDP-11 machine with a SCSI host adapter and a SCSI CD-ROM drive. They appear as RT-11 DU partitions 13 through 19. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - The implication to me is that any of these partitions could be copied to a 32MB file on a hard drive, and then attached to the PDP11 simulator of your choice and read as an RT-11 drive. The tool I would use for copying the partition is dd(1). dd if=/mnt/cdrom bs=32M skip=13 count=1 of=dskimg This requires that you have 32MB available RAM for the dd "copy in" and 32MB available disk space for the dd "copy out". You could trade off a smaller "bs" for a more complicated calculation of the "skip". I suppose I am making the assumption that this work is being done on a Unix-like system, which seems reasonable in the PUPS context. carl -- carl lowenstein marine physical lab u.c. san diego clowenst at ucsd.edu