> Timothe, > > > This list that you published an excerpt from, it it available online > somewhere? > > I am curious to understand what the DEC options NH14 and TR01 were? > > Are they listed there as well? >
I don't have info on the NH04...but we know that N* is "pulse height analysis equipment". But if we look elsewhere, we find: So the NH14 is a dual 12-bit Analog-Digital converter, built by DEC's computer special systems group in Merrimack, NH. Probably designed for the PDP-9 and used on the PDP-15; the DW15 would be an I/O Bus interface module. API probably isn't what you think. It's likely "Automatic Program Interrupt" - that is, you can get an interrupt on conversion done rather than polling. The TR01 isn't listed, but it would be a magtape controller or transport. Probably the latter. The TR02 went EOL in 1973, so the TR01 would be earlier than that. From the age, likely 7-track, perhaps 200 BPI. But those are guesses. Note that a DEC part number is a 4-2 or 2-5-2 format. The suffix can make a big difference, even if it's blank. I didn't work with either device mentioned. I don't remember where I found my copies of the OML. (Though I sometimes wish I'd saved the unedited copies that I once had.) On 27-Feb-16 16:24, Mattis Lind wrote: > Timothe, > > > This list that you published an excerpt from, it it available online > somewhere? > > I am curious to understand what the DEC options NH14 and TR01 were? > > Are they listed there as well? > > /Mattis > > 2016-02-27 21:27 GMT+01:00 Timothe Litt <[email protected] > <mailto:[email protected]>>: > > On 27-Feb-16 14:19, Bob Supnik wrote: >> Thanks, Tim. Burroughs made a lot of fixed head disks at the >> time. I can't identify the model, but the IA2 (see page 7-4 of >> the B6700 Hardware Handbook, on bitsavers) seems like a >> possibility. It has 7552 sectors per surface vs 8000, but >> Burroughs sectors were longer than DEC sectors (180 x 8b = 1440b >> vs 32 x 36b = 1152b), so perhaps DEC format had more sectors per >> track. >> >> While the 18b- and 36b-groups used the same disk buyout, they >> went to different vendors for drums. The Type 24 and RM09 came >> from Vermont Research; the RM10B from Bryant. >> >> /Bob >> >> On 2/27/2016 12:00 PM, [email protected] >> <mailto:[email protected]> wrote: >>> Message: 3 >>> Date: Sat, 27 Feb 2016 09:31:59 -0500 >>> From: Timothe Litt<[email protected]> <mailto:[email protected]> >>> To:[email protected] <mailto:To:[email protected]> >>> Subject: Re: [Simh] RB09 == RD10 >>> Message-ID:<[email protected]> >>> <mailto:[email protected]> >>> Content-Type: text/plain; charset="utf-8" >>> >>> On 27-Feb-16 08:23, Bob Supnik wrote: >>>> >Max Burnet gave me a pointer from some old price lists, >>>> showing that >>>> >the RD10 had very similar specs to the RB09. The RC10 manual >>>> confirms >>>> >it - same BCD addressing of tracks and sectors, same number of >>>> tracks, >>>> >same sectors per track, same words per sector (32 x 36b for >>>> the RD10, >>>> >64 x 18b for the RB09). So the "RD10s" on some PDP-9s in the >>>> services >>>> >listing are actually RB09s, at least at the drive level. >>>> > >>>> >I still don't know what an RC09 is. Alternate name for an RB09? >>>> >Half-sized variant? Another mystery is who made the actual drive >>>> >mechanism. It precedes DEC's first internally designed fixed head >>>> >disk, the RF09/RS09, by two years. >>> According to the option module list, the RC09 is a "Control for >>> Burroughs Disk" The design engineer was J. Milton. >>> >>> That makes sense, as the RC10 was the PDP10 controller for disk >>> and drums. >>> >>> FWIW, Family members: the RD10 was made by Burroughs. The RM10B >>> drum >>> was by Bryant. SW documentation was removed from the PDP-10 doc >>> set in >>> the 80s, but as I wrote previously, I believe the tech manuals >>> are on >>> the FS microfiche. The section with the red stripes on top. >>> >>> The drums were notoriously unreliable. Especially the ones in >>> the Mill, >>> though things improved when someone realized that they tended to >>> crash >>> when semitrailers bumped into the loading dock above them.... >> > I think this is confusing due to the hierarchy/bundling. It's not > complicated, > I think :-) > > Summary: > > RB09 = RC09 + RD10. (-A for 50 HZ) > Probably salable part number. > > RC09 = Controller > Probably not salable, except perhaps as FS spare. > > RD10 = Drive > Probably not salable, ditto > > FS probably used the controller on the contract rather than the > bundle. They did that > a lot. Remember that these early drives each had a dedicated > controller. Later (e.g. Massbus > disks), they'd be listed separately. Or the first drive + > controller had a part number, > add-on drives would be listed separately. But in this timeframe, > which they picked > was arbitrary. > > FWIW, in this case, the FS list indicates that the RC09 shipped > much later than the rest > of the system. The system shipped in july 65; the RC09 in jan 69. > > One other bit of trivia from the OML - the RB/RC09 went status 6 > in July of 71. (6 = Obsolete, but > can still be built.) "TPL" = "traditional products line"; I think > they were in Salem NH at that time. > > Supporting data: > > The (1974) OML edition that I have lists the RB/RC09 & RD10. The > 'C' would indicate controller > (thanks to Dick Best's semantic part number scheme.) I would > guess that RB decodes to > "Rotating magnetic memory", Burroughs" :-) The coding got more > creative as time went > on as the "good" letters were used by early products. (E.g. RK > for "Rotating Kartridge disk") > > There is also an entry for the RB09 and RB09-A - listed as "RC09 & > RD10" and "RC09 & RD10-A" > The -A are 50 Hz versions. > > There are RC controllers for the 7, 9, 10 & 11. (The RC11 > references the RS64 "65K 16 bit DEC DISK".) > > > > > > > > > _______________________________________________ > Simh mailing list > [email protected] <mailto:[email protected]> > http://mailman.trailing-edge.com/mailman/listinfo/simh > >
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