[Oberon] RISC.img format
Paul Reed
paulreed at paddedcell.com
Sun Feb 14 21:31:18 CET 2016
Hi Peter,
> ETH PC Native Oberon [...] and FPGA Oberon [have] a b-tree as primary
structure of the file system. Both FS are "flat". Both limit
> the length of a file name to 31 or 32 characters. They differ
> in upper limit on file size or on number of files? Better
> algorithms implement the newer FS?
The biggest actual difference, and probably the hardest to spot by just
comparing the source code, is that the on-disk data structures are
different due to the lack of a 16-bit integer type in Oberon-07.
What is a LONGINT in Oberon-88, is an INTEGER in Oberon-07 (which is 32-bit).
What is an INTEGER in Oberon-88 (which is 16-bit), had to be actually
changed (effectively to LONGINT from an Oberon-88 point of view) for the
2013 edition.
HTH,
Paul
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