iPhoned this in! On Jan 23, 2019, at 8:43 PM, Paul Koning via cctalk <cctalk at classiccmp.org> wrote: Google "pdp11/60" turns up some good pictures, one showing the console panel closeup is from a UK computer museum. The 11/44 picture is a bit strange looking because the innards show through the perforated panel, which is probably not how it would be perceived by most observers when just looking at one. The same goes for the 11/24. It seems like a problem caused by taking the photo with flash; lit by ambient light it would probably look better. PDP11/84 and I think 94 also can be found on the cover of some of the Handbooks in Bitsavers. A variant of the LSI-11 is the H-11 sold by Heathkit. Is that actually the same board? Either way it would be worth mentioning The heath h11 and the lsi11 are The same right down to the handle. The prime difference Is the heath backplane is smaller number of slots and user assembled along with the case and power supply. The memory, io, and disk system was all heath and could be used in dec backplanes and DEC cards in heath. The heath disk was RX01 comparable and could format media. Allison Do you want to show the PRO system boards? And maybe the I/O boards? Those both are quite different looking, especially the I/O boards with their odd connector and differing number scheme. (PRO boards are marked with the ROM ID number, a 16-bit value shown in 6 octal digits.) In the discussion of boards, you might mention that "FLIP CHIP" often appears (on older boards? All boards? Many boards regardless of age?). And there will be a "digital" logo, the 7-box kind. And the handles are either plastic or metal as shown, but either way always have a module number on them. If it looks like one of those cards but doesn't have a module number, or it's a large logic board with a white handle, it's probably from some other company though it may well be a DEC-compatible board. The "Miscellaneous Digital Equipment Corporation PDP-11 Information" link lands me on a "Forbidden" error page. paul

On 01/24/2019 10:38 AM, Ethan Dicks wrote: The H27 is media compatible with RX01 but the boot and driver for it is unique. RT11 then likely V4 with heath driver and was supplied as a special version TinyC interpreter as a language for HT11.? Back then that was about it for the H11. Common H27 issue was the hub clamp plastic would get brittle and die. That clamp is likely extinct. Its the one item I do not have is the H27.? I have ram, single serial cards (DL copies), and a parallel card that was used with the punch reader.? Most people found the H11 power supply rather flaky and usually moved to a BA11 as both upgrade and mechanical improvement.? Most that had the H11 moved to more mainstream DEC hardware and OS. All my systems use RX11, RX21, or RQDX2/3 with M7555 breakout board for floppies and MFM disks (RD52 Quantum), one has tu58,? and one system has RLV21, RQDX3, RX21-RX02, RLV21-RL02. Allison

On 24/01/2019 02:09, Zane Healy via cctalk wrote: I wouldn't let the friend who bought my 11/44 pay even a quarter of that. I bargained him down to about ?200 (I can't remember the exact figure) before I let him buy it :-) Actually, all those prices looked high. I know we have to strike a balance between setting unrealistic expectations for sellers (or driving the prices up) and making them think it's not worth the effort. But a couple of thousand dollars each for PDP11 processor boxes? Seriously? Philip.