1,360
edits
Space Shuttle Avionics: Difference between revisions
Jump to navigation
Jump to search
→GPC MEMORY (SPEC 0)
| Line 269: | Line 269: | ||
[[File:Shuttle avionics spec0.jpg|600px|GPC MEMROY utility display of the Space Shuttle]] | [[File:Shuttle avionics spec0.jpg|600px|GPC MEMROY utility display of the Space Shuttle]] | ||
The GPC memory display is the base layer of the Shuttle software - it is what is available after a GPC has been moded to RUN. Consequently it is used to determine what application software the GPC should load. | |||
This is done in two possible ways. A whole configuration for an OPS sequence can be edited using items 1 to 19 - GPCs can be assigned to a major function, to control the various data buses and to be in charge of an IDP (here called CRT for historical reasons). The assignment is then automatically executed once the OPS transition is called. | |||
Alternatively, a single GPC can be assigned a software configuration right now using items 45 to 47. In this way, for instance systems management can be made available in OPS 1 by loading SM software into one GPC (which is not nominally done). | |||
The rest of the display is in reality used for memory dumps, displays of actual memory content at a given address and similar things, however these items are not implemented in FG. | |||
=== TIME (SPEC 2) === | === TIME (SPEC 2) === | ||