Recent content by Bitly

I'd suggest you read 'Baking TKx0 Tapes', and other posts by @Chuck(G) and @Al Kossow for more details on how to 'fix' sticky shed, particularly if the tapes have something rare or valuable on them. I started playing around with dumping old tapes but put the project on hold until I can build a...

The TK50 interface is proprietary, but external TK50 boxes (usually?) have a SCSI controller inside. There should be a 50(ish) pin connector that is a pre-release version of SCSI-1. If memory serves it was single-ended, 8 bit so you need a really old card to connect to it. In addition, I'm not...

On sheet 6 (page 16) E107 is the memory decode. E107 decodes SH1 A16/A17/A18 H into the memory selects E107 F0 is connected to SH6 SHRAM 0 SEL L so the 0-64K range E107 F1 is connected to SH6_SHRAM 1 SEL L so the 64K-128K range In the lower left corner of sheet 5 (page 15) SH6 SHRAM 0/1 SEL L is...

I'd be tempted to boot up an old version of Ultrix (3.x?) in simh and try nroff there. I played with nroff on ubuntu with no success. CW

Could they be Mil-Spec versions of the M-series? CW

This is just my opinion, but DECNET seems to be geared more toward LAN operation, or in some cases interconnection multiple LANs within a single organization, whereas TCP/IP was developed to interconnect multiple (untrusted) organizations. I don't know of anyone (except perhaps DEC) that...

The L0006 is a remote diagnostic console for the 11/750. They are kinda rare, but also kinda useless since only DEC knew how to run them from the remote office. I'd be interested in a dump of the firmware on it for reverse engineering. CW

It was cheaper to buy the reduced-cost VAXstation and a replacement full-sized backplane than it was to buy a un-crippled system from DEC. My boss rebuilt a system this way, but sadly I didn't get the machine when the company closed. CW

Don't TK50s have the servo tracks pre-written so bulk erase makes the tape unusable? CW

Okay, after digging around some more I found that setting the controller to 'rqdx1' instead of 'rqdx3' (default) fixes the mount issue. Apparently Ultrix-11 V2.0 doesn't handle the RQDX3 correctly. Note, I didn't re-install, only changed the controller type in simh. I reinstalled with the drive...

I got Ultrix installed on SimH and @Terri Kennedy has the right answer. /usr is actually on /dev/rd07, so edit /etc/fstab and reboot. CW

My memory is fuzzy, but I believe Ultrix-11 V2.0 predates disklabel, so the partitioning would all be baked into the kernel, hence my suggest to reboot. CW PS: Digging through gunkies, disklabel was added to BSD-4.3 Tahoe (1986?) and Ultrix-11 V2.0 was released 1984.

I don't see anything wrong with the install log, but I'd probably '# sync' a few times after 'INITIAL SETUP COMPLETED' and then reboot before mounting /usr. The only reason I say that is it changes the kernel to '/rdunix'. CW

I've used (this) in the past for an 11/73 in SimH, but I don't recall how it worked out. Note, the link is from (Here) originally, but he was running RSTS/E, not Ultrix. CW

It is connected to 'BuVRESET (H)' in the KA630 schematics (MP02071) on page 58. BuVRESET is a buffered version of uVRESET (L) on page 44. I'm not sure if that is an input or output from the gate array though. The Semiconductor Handbook (Here) has documentation on the DC319 (page 3-27/533) which...