My memory is probably faulty about exactly what the WD suffix means. I still think it's 16-bit "ultra" (1), but Wikipedia says that ultra (1) is single-ended or HVD, ultra 2 is LVD or HVD, and ultra 3, 320, and 640 are LVD only.

On Sat, 18 Apr 2015, Cory Smelosky wrote: I was writing this when you sent the above reply ;) W -- wide N -- narrow WD -- wide differential ND -- narrow differential You'll need a converter. These type of differential drives can't be connected directly to a single ended bus, wide or narrow. If you do, you are connecting one side of the differential pair to ground, and these drives don't like that. There are also signal differences, see the pinouts for wide and wide differential and look at the pin numbers for attention, busy, ack, reset, etc. Later LVD devices could detect which sort of bus they were connected to, but these drives can't.

From: Cory Smelosky Sent: Saturday, April 18, 2015 9:22 AM http://www.scsi4me.com/scsi_hba-controller-cards_differential-hvd.html There is an Adaptec card and 2 LSI Logic (Symbios) cards, all under $100, all marked "used pull". I like the Paralan products (we used them in the XKL Toad-1 to connect a DAT drive--later a DLT--to the HVD bus), but they run $300-$500 each new. I don't know whether there is a used market. Rich Rich Alderson Vintage Computing Sr. Systems Engineer Living Computer Museum 2245 1st Avenue S Seattle, WA 98134 mailto:RichA at LivingComputerMuseum.org http://www.LivingComputerMuseum.org/

From: Cory Smelosky Sent: Monday, April 20, 2015 11:42 AM I'm not sure what you mean. The Panda monitor is a standard KL-10 monitor, usually attached to KLH10 but should be runnable on real hardware. As such, it would not need to have an MTBOOT that was customized in any way. Rich Rich Alderson Vintage Computing Sr. Systems Engineer Living Computer Museum 2245 1st Avenue S Seattle, WA 98134 mailto:RichA at LivingComputerMuseum.org http://www.LivingComputerMuseum.org/

From: Cory Smelosky Sent: Monday, April 20, 2015 12:13 PM We'd have to look at the BOOT source (BOOT.MAC) for that. FDDI? Not on the Toad-1, certainly. Toad-1 systems comprise 4 board types: XKL-1 CPU, XNI-1 10baseT Ethernet, XRH-1 "FASTWIDE" differential SCSI-2, and XMG-1 32MW memory. The XNI-1 looks to the monitor like 4x Cisco MEIS cards (derived from the Stanford interface of the same name), not a DEC NIA-20. There are PDFs of the Toad-1 System Installation manual and the Toad-1 Architecture Reference available via anonymous FTP from toad2a.livingcomputermuseum.org (change directory to PS:<DOCUMENTATION.TOAD>, ignore the warning about sending a password). XKL did not ship monitor source with the system, nor was it available for purchase separately. Rich Rich Alderson Vintage Computing Sr. Systems Engineer Living Computer Museum 2245 1st Avenue S Seattle, WA 98134 mailto:RichA at LivingComputerMuseum.org http://www.LivingComputerMuseum.org/

From: Cory Smelosky Sent: Monday, April 20, 2015 4:43 PM On Mon, 20 Apr 2015, Rich Alderson wrote: I don't see you logging in anywhere. Did you edit that out, or did you forget? Rich Rich Alderson Vintage Computing Sr. Systems Engineer Living Computer Museum 2245 1st Avenue S Seattle, WA 98134 mailto:RichA at LivingComputerMuseum.org http://www.LivingComputerMuseum.org/

On 4/20/2015 5:19 PM, Cory Smelosky wrote: Rich, I also had difficulty with the FTP, but trying to use Filezilla. I specified remote system type VMS for lack of any other filezilla OS that would take PS:<x.x.x> file names. I got a good anonymous session, but the PWD command was rejected by the server, and at that point Filezilla has a hissy fit and stops. I used the server->custom command to try to issue a LIST and NLST command to the server, but it was having none of that, and those commands time out after about 15 seconds. The linux command line FTP works fine. I wonder if Cory's problem was / is an active vs. passive issue? Does your firewall allow passive connections? (I think those are the ones which drill back at the server IP and expect to get another socket). I've had problems with that in the past, and have had to fiddle with various clients to get the right combination for the server. But on the Filezilla problem, I am not sure what the "dir" command on the linux command line client translates to that works, whereas issuing that as a custom command it is rejected. I just used mget to grab the documentation from the command line, so problem solved anyway. BTW with various people looking for Panda, I've not found anything, but am not giving up. I could swear I found access to it some time ago and got some stuff downloaded. thanks Jim

On Mon, Apr 20, 2015 at 11:29 AM, Rich Alderson <RichA at livingcomputermuseum.org> wrote: Would DEC DWZZB-AA be suitable for this application? http://www.ebay.com/itm/171056347113 http://www.ebay.com/itm/390293227921 ftp://ftp.hp.com/pub/openstorage/KDWZZBUG.PDF