Recent content by czunit

Depends. I have running TK50/70 drives on the pdp11's here. What's on the tapes?

Only thing I would recommend is using PETG instead of PLA if you want a really strong handle. For a single flip chip I think PLA is fine though.

Hm. I seem to recall that DMA on a PMI system goes from device to memory directly (over the Q22 bus with the usual burst mode stuff) and the pdp11/73's cache just snoops the transaction and invalidates any pages in cache that were written to by the DMA device. The double word read trick of PMI...

I've had good luck with CA adhesive with the stuff you rub on the plastic first. Lock-tite sells it, works surprisingly well for a lot of plastics.

It is a weird controller, no doubt. But maybe the problem is in the RD50; do you have a Gesswin tool to try checking it out or emulating.... well anything better than an RD50?

Wow, I did not know a VT05 had a 4 slot backplane in it for the logic cards (yes I know it's not Unibus)

That sounds right. When I ran it 30 years ago it had no issues with the DL11, so I must have set that jumper. C

I'm trying to remember: If I have a DLV11 on my 11/05 serving as the console, does that auto-disable the internal one?

Sorry to hear that man. Apparently there's a bunch of assholes out there. Most of my stuff is M series logic, but if you ever get to the point where a spare pdp8/L core is needed let me know. CZ

Terry: Appreciate the thought, however if I needed to boot it I could just boot off the RX01's (on the BDV11) then bring up the RQDX3 from a running RT11FB. This is just to figure out if the 4 chips that make up an 11/03 work. Getting to ODT and a few register checks would make me happy, RT11...

Quad width one (as in the OP). Likewise the BA23 is a stock one with the first 3 being Q22/CD and the rest Q22 serpentine. The trick as I recall is the 11/03 quad width could (and did back in my original 11/V03 system with the 4 slot quad width Q18/Q18 backplane) used extra pins to do the...

Well, what I remember was that the 11/03 has the ability to do external refresh on a few q bus pins that may have been repurposed. Can be disabled I suppose. Also I don't remember if the 11/03 had stuff on the CD pins that would blow up on the CD bus (maybe?)

Yeah I screwed up, it's a RSTS/E disk. On the Micro-RSX11M+ the install disk is toast. However apparently the other nine disks are a BRU backup. So is it possible to just boot a BRU64K disk, then restore the floppies to a RD51-54 disk to get that version up and running?

Quick question: Is it possible to put a quad height 11/03 in a BA23 chassis? If so can it use a 4mb memory board as a normal 64kb 16 bit memory. If so will the RQDX3 work with it? Bonus, can this work with a BDV11 bootstrap in the last slot? Thanks! C

There you go. From my Pro380 which I have no problem using Goteks with Flashfloppy firmware.