Resource structure (file)
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 A resource file (*.RSC) is normally loaded with ~RSRC_LOAD(filenamne), 
which allocates memory for the file, and then performs:
   - internal AES pointer initialization (ADDROUT(0)= tree%)
   - conversion of character coordinates to pixel coordinates in the 
current resolution (ie ~RSRC_OBFIX(tree%,obj%) for each object)
   - pointer conversion (L:ob_spec and others) from file relative to memory 
absolute (see file structure below)

 The RSC-file is structured as at least five distinct blocks:
   - a file header (18 words, 36 bytes)
   - a text block with all strings, masks and type info
   - an info block with L:pointers (TEDINFO to texts...)
   - a tree info block (L:ob_spec pointers) (n x 24 bytes)
   - a relocation table (L: rel ptrs, n x 4 bytes)

 It should be noted that the program variable tree% obtained with the 
function ~RSRC_GADDR(0,0,tree%) points to the (first) tree info block, not 
the beginning of the file as located in memory. Filestart is thus at:
   <tree%> - <W:rsh_vrsn>

 File header (18 words)
   +00   1  W:rsh_vrsn (editor ID#, usually 0 or 1)
   --- offset pointers
   +02   2  W:rsh_object (relative) to (first) tree info (object field)
         3  W:rsh_tedinfo  position of the TEDINFo structs
         4  W:rsh_iconblk  position of the ICONBLK structs
         5  W:rsh_bitblk   position of the BITBLK struct
         6  W:rsh_frstr    position of the free strings
         7  W:rsh_string   position of fixed strings
         8  W:rsh_imdata   position of imagedata
         9  W:rsh_frimg    position of the free images
        10  W:rsh_trindex  (relative) to relocation table
   --- structure info
   +20  11  W:rsh_nobs     total number of objects
        12  W:rsh_ntree    Obj trees (must be >=1 for valid RSC-file)
        13  W:rsh_nted     total number of TEDINFO structs
        14  W:rsh_nib      total number of ICONBLK structs
        15  W:rsh_nbb      total number of BITBLK structs
        16  W:rsh_nstring  total number of strings
        17  W:rsh_nimages  total number of images
        18  W:rsh_rssize   file length (should be same as LOF when loading)
   --- --- ---
   +36 start of text strings

Notes:
 K saves with W(1) id#=1.
 K-resource rejects files if W(18)<>LOF().W(18) may be poked to correct 
(actual) size to fix this.

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*** Daggskimmer BBS 1991 ***
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