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Article #625603Re: 360/20, was PDP 11/40 system manual
From: Peter Flass
Date: Sat, 18 Aug 2018 17:58
Date: Sat, 18 Aug 2018 17:58
29 lines
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3266 bytes
<terry-...@glaver.org> wrote: > On Friday, August 17, 2018 at 2:36:15 PM UTC-4, John Levine wrote: >> The 2560 MFCM card read/punch/interpret/sort/crumple device and the >> internal modems were unique to the /20 but the 1403 printer, 2415 tape, >> and everything else were regular 360 devices. > > The 2560 Mother-Friendly Card Mangler (a piece of hardware known for > having 2 input hoppers, 5 output hoppers and a few U-turns and flip-overs > in between, all operating in a non-deterministic manner*) managed to make > life miserable for people well into the 370 era. I had the misfortune of > having one on a 370/125 (the same 125 that MAI cut a 4" square hole into > to run a bazillion wires through for their Brand X add-on memory). I was > actually there when the "engineer" took a Sawzall to the chassis. Anyway, > the 3125 CPU's Integrated Mumble Adapter supported the 2560. > > * As an example of the kind of fun you can have, which input hopper fed > the read station and which one fed the punch station depended on what > partition your job landed in under DOS/VS POWER. As you can imagine, in > an academic environment, merriment ensued as students punched their > output on other student job decks innocently waiting in the (alleged) read hopper. > Those kinds of card devices and spoolers don't play well together. That's probably why only the low-end models of 360 and 370 could attach them. I don't believe POWER or HASP supported the 2540 punch-feed-read feature either. You could stacker-select the output using carriage control. -- Pete
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