This may make a cool Propeller emulation project - Apollo landing computer
RobotWorkshop
Posts: 2,307
This would make a cool project to create with a Propeller!
http://www.galaxiki.org/web/main/_blog/all/build-your-own-nasa-apollo-landing-computer-no-kidding.shtml
http://www.galaxiki.org/web/main/_blog/all/build-your-own-nasa-apollo-landing-computer-no-kidding.shtml
Comments
The prop should do it easily. VGA or TV will do the simulated display cheaply, and a PS2 keyboard with command keys relabled alpha or function keys.
Hey, what about doing this for the Prop contest ?
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Links to other interesting threads:
· Home of the MultiBladeProps: TriBladeProp, RamBlade, TwinBlade,·SixBlade, website
· Single Board Computer:·3 Propeller ICs·and a·TriBladeProp board (ZiCog Z80 Emulator)
· Prop Tools under Development or Completed (Index)
· Emulators: Micros eg Altair, and Terminals eg VT100 (Index) ZiCog (Z80), MoCog (6809)
· Search the Propeller forums (via Google)
My cruising website is: ·www.bluemagic.biz·· MultiBladeProp is: www.bluemagic.biz/cluso.htm
Perhaps someone will pick this up and run with it. Just though it was really cool and wanted to pass it along....
Robert
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Visit the home of pPropQL: propeller.wikispaces.com/pPropQL
pPropQL020: propeller.wikispaces.com/pPropQL
OMU for the pPropQL/020 propeller.wikispaces.com/OMU
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Links to other interesting threads:
· Home of the MultiBladeProps: TriBladeProp, RamBlade, TwinBlade,·SixBlade, website
· Single Board Computer:·3 Propeller ICs·and a·TriBladeProp board (ZiCog Z80 Emulator)
· Prop Tools under Development or Completed (Index)
· Emulators: Micros eg Altair, and Terminals eg VT100 (Index) ZiCog (Z80), MoCog (6809)
· Search the Propeller forums (via Google)
My cruising website is: ·www.bluemagic.biz·· MultiBladeProp is: www.bluemagic.biz/cluso.htm
microcomputer prop-projects for a while and branch out. [noparse]:)[/noparse]
The more I think about it, it would be cool to do the controller's side (RS232 terminal link)
so that two people could play with it.
Must.. resist..doing..this..for..contest....
OBC
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New to the Propeller?
Visit the: The Propeller Pages @ Warranty Void.
An awesome book on the system is on sale at AMAZON:
Digital Apollo: Human and Machine in Spaceflight by David A. Mindell
If you started reading that book you would want to start working on a Prop version and build a mock lander out of cardboard using refrigerator boxes. Ok, maybe I would build the cardboard ship for the kids.....
Robert
Though it probably wouldn't be too hard building one using TTL logic and a couple of NVRAM chips.
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Links to other interesting threads:
· Home of the MultiBladeProps: TriBladeProp, RamBlade, TwinBlade,·SixBlade, website
· Single Board Computer:·3 Propeller ICs·and a·TriBladeProp board (ZiCog Z80 Emulator)
· Prop Tools under Development or Completed (Index)
· Emulators: Micros eg Altair, and Terminals eg VT100 (Index) ZiCog (Z80), MoCog (6809)
· Search the Propeller forums (via Google)
My cruising website is: ·www.bluemagic.biz·· MultiBladeProp is: www.bluemagic.biz/cluso.htm
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For me, the past is not over yet.
How about a launch location...
Here's one. A bargan at only $2,800,000.
(Of course might might be able to stack 400000 Propeller chips you could have purchased and climb.)
OBC
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New to the Propeller?
Visit the: The Propeller Pages @ Warranty Void.
Just emulating the 11 instructions some memory some timers a bit of I/O should suffice... and a real lander of course!
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Visit the home of pPropQL: propeller.wikispaces.com/pPropQL
pPropQL020: propeller.wikispaces.com/pPropQL
OMU for the pPropQL/020 propeller.wikispaces.com/OMU
Seems someone is still trying to convince you:
www.nasa.gov/mission_pages/LRO/multimedia/lroimages/apollosites.html
Anyway it must be true. I saw it live on T.V. at the time[noparse]:)[/noparse]
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For me, the past is not over yet.
I downloaded it, wow, all of a sudden I'm reading the source code of Apollo guidance software written in 1968.
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For me, the past is not over yet.
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Links to other interesting threads:
· Home of the MultiBladeProps: TriBladeProp, RamBlade, TwinBlade,·SixBlade, website
· Single Board Computer:·3 Propeller ICs·and a·TriBladeProp board (ZiCog Z80 Emulator)
· Prop Tools under Development or Completed (Index)
· Emulators: Micros eg Altair, and Terminals eg VT100 (Index) ZiCog (Z80), MoCog (6809)
· Search the Propeller forums (via Google)
My cruising website is: ·www.bluemagic.biz·· MultiBladeProp is: www.bluemagic.biz/cluso.htm
In that package linked above you will find EmbeddedDemo.c which is an example of how to build a minimal AGC emulator engine for embedded systems. Compiling it for Linux results in a ~30Kb executable. Comments there state this is written in very minimalist C that should compile for any platform.
Brilliant, no need to waste months trying to create yet another instruction set emulation in PASM.
So:
1) We need a TriBlade, Morpheous or other Prop board that has external memory.
2) ICC or Catalina to compile that embedded AGC for XMM on the Prop.
3) Probably a second Prop to run the keyboard and seven segment displays.
4) Or a second Prop to run a nice DSKY display in VGA.
Job done[noparse]:)[/noparse]
I'd love to have authentic looking keyboard and display hardware to go with this.
Edit: Something like this:
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For me, the past is not over yet.
Post Edited (heater) : 7/18/2009 12:13:16 PM GMT
surely with no atmosphere to block the view of the stars, we'd see them in that pic, considering how much sky would be there! [noparse]:)[/noparse] lol
http://www.nasa.gov/images/content/369227main_aldrinLM_full.jpg ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
http://www.propgfx.co.uk/forum/·home of the PropGFX Lite
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Edit: RobotWorkshop: "...and build a mock lander out of cardboard using refrigerator boxes..."
Looks exactly like that.
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For me, the past is not over yet.
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http://www.propgfx.co.uk/forum/·home of the PropGFX Lite
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Still it implies to me that given the moons gravity is about 1/6th that of the earth we only need something six times bigger than that to get two guys from earth into earth orbit. Plus some baggage allowance say 12 times. How come we have not made such a thing to jump up and down to the space station?
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For me, the past is not over yet.
1. No stars.
2. The abrupt end to the horizon with little rocks on it, considering there's no mountain range, surely the horizon should look different to what it's showing.
3. Did they have cameras in those days that could do crystal clear and HD large colour photo's?
3. Buzz's shadow goes to about just under 10 feet away from him, yet the ships goes to the horizon?
4. Why all the different types of foil? gold, copper, and silver?
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http://www.propgfx.co.uk/forum/·home of the PropGFX Lite
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1) No Stars... - In that picture we are looking at an LM with the sun shinning full blast from behind us. Given the lack of atmosphere the LM was incredibly brightly lit with a lot of light reflected back from all that foil and white space suit etc. Therefore the the camera is stopped right down. Therefore the starts are too dim to show up. How many starts do you see driving at night when a car is coming at you with headlamps on full beam?
2) The abrupt end to the horizon... - Don't forget the moon is much smaller than the earth so the horizon is much closer. Any mountains are over the horizon.
3) Did they have cameras. HD large colour photo's... - Yep they did. They were Hasselblads with medium format film (I think) 6cm * 6cm.
www.lpi.usra.edu/resources/apollo/catalog/70mm/
4) Buzz's shadow... - Goes over a bump and get s lost in the shadow of the LM. Again the horizon is much closer than we are used to.
4) Why all the different types of foil... - Think roasting a chicken in the oven. There is a lot of heat coming from the sun with no atmosphere, better to reflect it. At least that's my guess.
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For me, the past is not over yet.
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http://www.propgfx.co.uk/forum/·home of the PropGFX Lite
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For me, the past is not over yet.
anyway, I best get back to this prop game while I have some spare time [noparse]:D[/noparse]
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http://www.propgfx.co.uk/forum/·home of the PropGFX Lite
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http://www.propgfx.co.uk/forum/·home of the PropGFX Lite
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Already. The AGC's need at least 42KB of RAM to play in. If I remember Catalina can only use the Prop HUB RAM for C variables at the moment.
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For me, the past is not over yet.
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http://www.propgfx.co.uk/forum/·home of the PropGFX Lite
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Here's a video I made:
4 Minute Video
The code used in this video is tutorial #6 in your ViewPort installation, so go ahead and try it out!
Hanno
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Download a free trial of ViewPort- the premier visual debugger for the Propeller
Includes full debugger, simulated instruments, fuzzy logic, and OpenCV for computer vision. Now a Parallax Product!
Why then did we American taxpayers pay so much for chicken sheds?!
Well, OK, sure - they were *flying* chicken sheds.
But we get those for FREE in Kansas whenever there's a tornado...
OK, seriously now :-P
> Why all the different types of foil? gold, copper, and silver
Radiation, micrometeor, and - as heater (who I assume knows a thing or two about heat) mentioned - heat shielding.
> is about 1/6th that of the earth we only need something six times bigger
Well, as you note the moon is much smaller than the earth, so besides it mass and thus its gravitational pull being less, the radius also factors in.
consider this Wiki entry:
"Misconception
Planetary or lunar escape velocity is sometimes misunderstood to be the speed a powered vehicle (such as a rocket) must reach to leave orbit; however, this is not the case, as the quoted number is typically the surface escape velocity, and vehicles need never achieve that speed. This surface escape velocity is the speed required for an object to leave the planet if the object is simply projected from the surface of the planet and then left without any more kinetic energy input: in practice the vehicle's propulsion system will continue to provide energy after it has left the surface.
In fact a vehicle can leave the Earth's gravity at any speed. At higher altitudes, the local escape velocity is lower. But at the instant the propulsion stops, the vehicle can only escape if its speed is greater than or equal to the local escape velocity at that position. At sufficiently high altitudes this speed can approach 0. " 2)
(Note the escape velocity tables too!)
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1) http://en.wikipedia.org/wiki/Apollo_Moon_Landing_hoax_conspiracy_theories
2) http://en.wikipedia.org/wiki/Escape_velocity#Misconception
See also:
http://en.wikipedia.org/wiki/Gravitational_assist
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What is the misconception about escape velocity? If you want to move an object from the earth's surface to an infinite distance away (i.e. to escape the effect of earth's gravity) you will need to use a certain amount of energy. Lets call it E.
Now, the energy of a moving body is given by 0.5 times its mass times its velocity squared. So you can calculate the velocity required for something moving up from the earth to have energy E. Such that it will never fall back.
But, as you point out, there is no need to ever have that velocity. Lets say there was an infinitely long cable with a winch on the end pulling the object up from the earth at 1cm per second for an infinite time. That would do it also. However the energy put in by the winch is still that same E.
The magic thing about escape velocity is that it is independent of the mass of the object.
Do they still teach Newtonian physics in high school ?
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For me, the past is not over yet.