Meadville Space Center
Welcome, Guest. Please login or register.
October 25, 2020, 07:03:28 AM

Login with username, password and session length
Search:     Advanced search
Gemini 060615 released!
25068 Posts in 2094 Topics by 2266 Members
Latest Member: twa517
* Home Help Search Login Register
  Show Posts
Pages: 1 [2] 3 4
16  Project Apollo - NASSP / Project Apollo - NASSP Development / Re: Virtual AGC on: January 03, 2017, 06:15:09 PM
Super, thanks guys!  Very Happy @indy91, when Zerlina works in NASSP we need to record a video of it and send it to Don, as a thank-you for working with us. I'm sure he'd love to see it in action again.  Thumbs Up

It's likely that the next four things to be scanned will be the other four simulations, so it's going to be a bit before Zerlina is up. Then, I think, Shepatin and Zerlina will be scanned together. I'll avoid doing the paperwork until it's closer to scanning time in case anybody else decides to chip in!
17  Project Apollo - NASSP / Project Apollo - NASSP Development / Re: Virtual AGC on: January 03, 2017, 06:00:54 PM
Hahaha, well maybe we should just work out something for Zerlina then. I'm in the US. How much would you be willing to chip in, jalexb88? I have a friend who pledged $50 to me offline to help cover it, so we're currently at:

indy91 - $50
kneecaps - $50
jalexb88 - ??
my friend - $50
me - remainder (~200-250?)

Which isn't too bad.  Very Happy
18  Project Apollo - NASSP / Project Apollo - NASSP Development / Re: Virtual AGC on: January 03, 2017, 05:37:46 PM
Swell.  Happy That's just a suggestion, of course -- if you guys would rather put the money towards Zerlina we can work that out too. If you do agree to go for the simulation, hit Ron up and he'll send along the paperwork. I think one of you will need to be the primary sponsor.
19  Project Apollo - NASSP / Project Apollo - NASSP Development / Re: Virtual AGC on: January 03, 2017, 04:31:18 PM
@indy91 and @kneecaps -- if it's just the two of you, and you're both thinking about throwing in $50, how about splitting the Zerlina simulation 50/50? The total cost for that one is $101.75. That would simplify things (less hands exchanging money). And I promise it won't put scanning of Zerlina itself at risk; if nobody pledges the full amount by the time we need it I'll be covering it.
20  Project Apollo - NASSP / Project Apollo - NASSP Development / Re: Virtual AGC on: December 16, 2016, 12:38:18 PM
Aha! That makes more sense. I guess, based on the observed behavior above, that's meant to mean that No DAP resets ASAP instead of potentially waiting 5 seconds. Happy
21  Project Apollo - NASSP / Project Apollo - NASSP Development / Re: Virtual AGC on: December 16, 2016, 12:22:42 PM
I think that information must have originally come from the A15 Delco manual. At least, that's what I've been using and assuming was correct all this time.  Rolling Eyes  Barring any other evidence, though, I guess we'll just have to assume it's wrong.

Also, "The Apollo 15 LM Activation Checklist mentions that with a Verb 35 all lights except the NO DAP light are on" reeeaaallly? That's strange. I did a V35 in Luminary 210 very shortly after we finished transcription of its octals, and this is what I got:


Granted, I did indeed not have DAP in control at the time, but the PINBALL code for the light test does set the NO DAP bit for light tests: http://www.ibiblio.org/apollo/listings/Luminary210/PINBALL_GAME__BUTTONS_AND_LIGHTS.agc.html#545354434F4E32
22  Project Apollo - NASSP / Project Apollo - NASSP Development / Re: Virtual AGC on: December 16, 2016, 11:57:04 AM
Did some more digging. Apollo 15's closeout pictures have the DSKY obscured, but here's an Apollo 16 closeout picture that has labels agreeing with the two above images: https://www.hq.nasa.gov/alsj/a16/LM11-co46.jpg

23  Project Apollo - NASSP / Project Apollo - NASSP Development / Re: Virtual AGC on: December 16, 2016, 11:35:27 AM
I'm also willing to foot a decent bit of the Zerlina bill, but any more help would of course be hugely appreciated.  Wink

As far as NO DAP and PRIO DISP, I don't think there's any more editing that needs to be done, unless the goal is to make things easier for beginners. Both the Apollo 15 and Apollo 16 Delco manuals indicate that the labels weren't shown on the lights in the LM (though I guess we can't be sure about 17). The only DSKY I've seen a picture of that actually had such labels is this one:


But I'm really unclear as to what this DSKY is. The sign behind it has the logo for Apollo 8, but claims that this DSKY flew on Apollo 10. However, it's a LM DSKY, and I was under the impression that 10's ascent stage was hanging around in space somewhere. Did they remove the DSKY from the LM before undocking? It seems kind of unlikely, and I can't find any documentation about it.

Furthermore, the PRIO DISP and NO DAP labels are in the wrong places, and neither had been implemented for Luminary 69. Also, the digital indicator is missing its protective frame, so it must have been disassembled and then only mostly reassembled after flight for some reason. So, who knows.

e: Now I'm really confused. Here's an Apollo 17 LM closeout picture from the ALSJ:


It also has the labels swapped from the Delco manuals....
24  Project Apollo - NASSP / Project Apollo - NASSP Development / Re: NASSP 7.0 Beta - Testing for release on: November 06, 2016, 11:51:53 AM
Yeah, I'm totally new to Orbiter. What docs should I start with, coming in as a totally new user? I can load up a scenario and pan around the rocket but am not sure what I'm supposed to do from there.
25  Project Apollo - NASSP / Planning / Re: Steps before Apollo 7 on: October 27, 2016, 06:21:15 PM
... a few people who are sufficiently interested in Apollo but have not seen recent versions of NASSP before ...

I think I probably fit in that bucket. The furthest I've ever gone with NASSP is installing it to try to test out VirtualAGC changes I've made... but then I quickly realized I had no idea what the heck I was doing. I am a big fan of aircraft study sims, though, and would love to learn more than just the internal AGC workings.  Happy
26  Project Apollo - NASSP / Project Apollo - NASSP Development / Re: Virtual AGC on: October 09, 2016, 09:45:29 PM
Yeah, it'll also fix that timing error. Sorry about that.
27  Project Apollo - NASSP / Project Apollo - NASSP Development / Re: Virtual AGC on: October 09, 2016, 12:50:26 PM
My math doesn't line up with exactly 20 seconds, but I found and fixed this: https://github.com/rburkey2005/virtualagc/commit/e30fefb1ace7abd318b0c7a4b3bf08f1cbde1eb0

That would skew the clock by 1/3200 of a second every 5.12 seconds (or 1/1600 of a second pre-standby-addition). That's in the same ballpark of error, at least.
28  Project Apollo - NASSP / Project Apollo - NASSP Development / Re: Virtual AGC on: October 08, 2016, 02:53:49 AM
Unless I've horribly broken something (which has certainly happened before), the only timer phasing difference with this set of changes should be a shift of TIME6 counts to 0.3125ms after TIME1 increments. My gut feeling is that this shouldn't have that much of an impact on behavior, but I'd be happy to be wrong.  Very Happy
29  Project Apollo - NASSP / Project Apollo - NASSP Development / Re: Virtual AGC on: October 05, 2016, 07:11:30 PM
The simulations have some pages of setup information for the AGC, so it's possible that we might get the equivalent of a pad load out of them. Wink No promises, though. Either way, that Zerlina simulation is going to be our best bet at finding such numbers for it.
30  Project Apollo - NASSP / Programming / Re: LM status... on: September 12, 2016, 09:07:30 PM
Alright, so what's going on with RUPT10: there's three different possible sources of it, enabled under software control. They are:

Trap 31-A (enabled by resetting CH13 bit 12) : Causes a RUPT10 when any of CH31 bits 1-6 are set.
Trap 31-B (enabled by resetting CH13 bit 13) : Causes a RUPT10 when any of CH31 bits 7-12 are set.
Trap 32 (enabled by resetting CH13 bit 14) : Causes a RUPT10 when any of CH32 bits 1-10 are set.

Looks like the LPD is on 31-A, and that's the only one that I can obviously see is being used. So your "once on moving out of detent" sounds like it should work fine.
Pages: 1 [2] 3 4
Powered by MySQL Powered by PHP Powered by SMF 1.1.10 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!