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Universal Serial Bus
This page provides global information for running USB
on RISC OS. USB has gradually replaced older computer interfaces
like PS-2, Centronics, RS-232 and SCSI. It provides a universal
interface for a wide variety of peripherals and is supported by
nearly all operating systems in the world.
USB devices are divided into classes, and each class
requires a dedicated driver to allow the connected peripheral to
work under the operating system. Some classes are readily supported
by RISC OS, but others require a third-party driver. The table below
shows which drivers are available for RISC OS and where they can be
found. Support for the HID-class can be found on this website.
This class consists of Human Interface Devices, like keyboard, mouse
and joystick.
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The following USB software is available from this website:
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- USBinfo
Freeware application that provides a graphical display of the
computer's USB subsystem.
- USBHID
Full support for Human Interface Devices (HID) under RISC OS.
A wide variety of USB keyboards, mice and joysticks are readily
supported by our USBHID driver.
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USB devices are categorised in so-called classes that are numbered
from 1 to 255, with class 255 being the unspecified vendor specific
class. The following classes are currently known:
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Class
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Description
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RISC OS
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Info
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1
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Audio Control
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-
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-
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2
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Communication device
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-
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-
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3
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Human Interface Devices (HID) e.g. keyboard, mouse
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!HID
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Info
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6
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Imaging devices, such as scanners and cameras
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-
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-
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7
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Printing
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Standard
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Info
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8
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Mass Storage Devices
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Standard
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Info
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9
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HUB
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Standard
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Info
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10
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Data Interface
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-
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-
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11
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Smart cards and chip cards
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-
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-
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255
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Vendor Specific Class
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-
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-
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If you are interested in writing USB drivers, you are advised
to read the extensive documentation available from the USB Forum,
as listed below.
In addition you need to know how RISC OS works in general,
and in particular how USB is implemented under RISC OS.
As the USB Application Programming Interface (API) may seem complex
in the beginning, we have created a
small application that may help
you understanding the underlying structures.
It is available freely.
➤ Get the USBinfo application
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- Documentation about the USB standard
These documents decribe the official USB standard as
published by the USB Forum. Several documents are available
about the USB standard in general and various device classes
in particular.
- API (Application Programming Interface)
This document describes the way in which RISC OS expects a
USB card to work and how drivers should communicate with
the low-level USB hardware. This API is supported by the
new Castle USB podules.
➤ Overview of the various USB classes and RISC OS compatibility
- Overview of the various USB classes
We have created an overview of all USB classes currently recognised
by the RISC OS hardware and software.
➤ Supported Mass Storage Devices
- Report a new USB Device
We would like to keep our website and the !USBinfo application
us to date. For that, we need your help. If you come across
a new device that is not recognised by !USBinfo (i.e. it shows
no vendor logo, or it shows the generic class icon), please
report to us.
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Any links shown in red are currently unavailable.
© X-Ample Technology BV.
Last changed: Thursday, 03 November 2016 - 10:13 CET.
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