This is the contents of the hard disk of an Archimedes A500 belonging to Logica
in the 1980s. It's a copy of LogicaA500 Host FS zip on
the Domesday86 site.
The extraction was done by Ian Stocks. Major kudos.
Where you have two subdirectories B and C, B will contain BCPL source
and C will contain the compiled images of that source.
The Archimedes filesystem was not case-sensitive. The RISC OS character encoding is a bit like ISO 8859-1, but has its quirks.
| dirname | what's in it |
|---|---|
| ARC/BASIC | no source code |
| ARC/CF | community find |
| ARC/CM | community map |
| ARC/CO | community overlay |
| ARC/CP | community photo |
| ARC/CT | ctext, and also aatext: builds overlay |
| ARC/DH | data handler |
| ARC/GH | globals header |
| ARC/GHDRS | globals headers; same code as GH, later revision |
| ARC/H | community headers |
| ARC/HDRS | community headers; same code as H, later revision |
| ARC/HE | help |
| ARC/KE | kernel |
| ARC/l | no source code |
| ARC/na | national area |
| ARC/nc | national chart |
| ARC/ne | national essay |
| ARC/nf | national find |
| ARC/NM | national maps |
| ARC/NN | also national maps; the files in here claim to be in NM instead |
| ARC/np | national photo |
| ARC/nt | national contents (but why?) |
| ARC/nv | national video |
| ARC/nw | national walk |
| ARC/R | only test stuff |
| ARC/sc | system charts (graphics library) |
| ARC/si | system inits (for most of the other directories) |
| ARC/ut | utilities (part 1) |
| ARC/utils | utilities (part 2) |
| ARC/vh | video handler |
| ARC/view | just a string table |