[Oberon] SD Card File Exchange

Chris Burrows chris at cfbsoftware.com
Mon Feb 1 06:54:07 CET 2021

> -----Original Message-----
> From: Skulski, Wojciech [mailto:skulski at pas.rochester.edu]
> Sent: Monday, 1 February 2021 3:49 PM
> To: chris at cfbsoftware.com; ETH Oberon and related systems
> Subject: Re: [Oberon] SD Card File Exchange (was: Why is RSC string
> data word-aligned?)
> Chris:
> >"HCFiler - An efficient embedded SDHC FileSystem"
> >https://www.astrobe.com/forum/viewtopic.php?f=4&t=534
> I know. It is great!
> >Copying files from Windows using HCFiler has not been a high
> priority
> >for me as nobody apart from you has asked me for it to date. Is
> there
> >anybody else here who is interested?
> I would ask an opposite question. Why the RISC5 OS should not adopt
> the HCFiler as an official file system?

There are many reasons why it is not suitable as the file system for RISC5
OS. For starters it is sequential access only - not random access. Think of
it as like writing data to a tape drive. It is designed to be used to stream
continuous data to / from the SD card, such as might be used in a
data-logging application. Hence it is useful for transferring files from one
system to another or for backing up a set of files, but could not be used,
for example, with a text editor.


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