All, I've located two HP 2116 systems, a B and a C. I've also got access to period Teletypes, 2748A paper tape reader requiring restoration, and the uncatalogued back stores of a museum. I'm strongly considering a restoring one working system from the two for museum demonstration and display. If you were me, or have had experience with these systems before, what would you keep in mind or look out for? Assume for the moment I have the time and skills myself or available from colleagues to carry out the work. All thoughts and contributions gratefully received. Some background and progress: * neither system has been in "conservation friendly" storage conditions. * the museum has fairly extensive HP collection, which makes missing component location more likely if required * the museum also has a range of HP instruments which might be used to create an interactive industrial control or scientific computing display My first steps so far: 1. Conduct background reading research using internet sites and scans. Thanks to all the following for making these resources available * Al and Bitsavers, * http://www.cs.ubc.ca/~hilpert/e/HP21xx/HP2116.html (B Hilpert) * http://rikers.org (Tim Riker) * http://www.hpmuseum.net/ 2. Begin basic physical evaluation of the "C" system: a. Basic cleaning of the cabinet and vacuuming out of components -- so far excluding the card cages (ran out of time) b. Begin inventorying components and starting photographing them The verdict so far is that environmental damage appears limited to the front panel and some limited contact corrosion on the chassis and panels. There's mildew evident on the some cabling, but not really showing on what I've seen on the backplane wire-wrap so far so far. The cards are in a muddle though. This is what I've catalogued: ================================================= <Rack 1> 1 - 22 EMPTY <Rack 2> 101 A101 Front Panel Coupler 102 A102-105 Arithmetic Logic 103 A102-105 Arithmetic Logic 104 A102-105 Arithmetic Logic 105 A102-105 Arithmetic Logic 106 A106 TIMING GEN (clock) 107 A107 Instruction Decoder 108 EMPTY -- Missing A108 Shift logic (this could be in the loose boards) 109 EMPTY 110 EMPTY 111 EMPTY 112 EMPTY 113 EMPTY 114 EMPTY 115 EMPTY 116 EMPTY 117 EMPTY 118 EMPTY 119 EMPTY 120 EMPTY <Rack 3> 201 A201 I/O Control 202 EMPTY 203 EMPTY 204 EMPTY 205 ?? *not yet identified* 206 A13 MDB (this is supposed to be in slot 13?) 207 POWER FAIL (not sure what this is in relation related cards 208 POWER FAIL 209 POWER FAIL 210 POWER FAIL 211 ?? 212 A4,6,16,18 Inhibit Driver (should be in the 2116 B according to #1) 213 A4,6,16,18 Inhibit Driver (should be in the 2116 B according to #1) 214 A4,6,16,18 Inhibit Driver (should be in the 2116 B according to #1) 215 A4,6,16,18 Inhibit Driver (should be in the 2116 B according to #1) 216 MMD / XV Driver ( should be associated with a core board ) 217 SSA ( should be associated with a core board ) 218 A2 219 A8,9,14,15 Driver Switch (should be in the 2116 B according to #1) 220 MDB ( system should only have one of these ) 221 EMPTY 222 EMPTY <Loose> Looks like two or three core stacks and four cards: POWER FAIL ?? ?? ?? =================================================== Given that some of these cards look like they are from the wrong machine, all the memory slots are unpopulated (some are stuck in the IO rack), I'm guessing that the guts of this system have been mixed and matched with others, possibly the "B" model -- either that or just shuffled. I won't know until I've started to look at the "B" model for comparison, and of course, completed the cataloguing of this one. -- Colin