|
Mousing It By Peter Naulls. Published: 17th Mar 2005, 13:49:05 | Permalink | PrintableIan Nichols shows the DIY mouse way  In a recent usenet posting in reply to a query about where to obtain Acorn Mice, Ian Nichols commented that he'd had success modifying standard optical PS/2 mice for use on RiscPCs.
As you may know, Acorn machines from the Archimedes up to the RiscPC have an atypical mouse interface, normally referred to as "quadrature". Outside of Acorn machines, these were also widely used on Sun machines and terminals. Historically, most mice on other platforms were serial, and later PS/2 and more recently, USB. Many mice now available for purchase work on both PS/2 and USB interfaces. PS/2 is also used for the keyboard interface on RiscPCs.
Even at the time of the RiscPC manufacture, the quadrature interface was unfashionable, and the story goes that Acorn only stuck with it because of supplies of components. They later ditched this, and A7000s and A7000+s received a PS/2 interface, as was the norm on PCs at the time.
Still, this left existing users who required a new mouse a relatively expensive replacement option from Acorn. To the rescue came STD, who created a PS/2 adaptor allowing attachment of the growing range of PS/2 mousing options from the likes of Logitech. Later, STD produced a smaller and cheaper option, the PS2MouseMini, a small cable adapter performing much the same job. Soon after, Castle produced a similar product. Both STD and Castle also produced their own Acorn-compatible mice.
DIYing it
In November 2003, Ian Nichols tells his readers, he discovered that some optical mice (those are the ones without wheels, but use LED reflections to determine motion) contain chips that are able to output quadrature signals as well as the PS/2 signalling. Screwdriver and soldering iron in hand, and using a cable from an Acorn mouse, Ian went onto to modify several mice for himself and fellow club members.
If you fancy having a go yourself, and saving a few pennies, then Ian has recently documented the whole thing, on his website.
Links
Ian's original post
STD/Advantage6
Castle Technology
Optical mouse conversion plans
Previous: Light at end of Impression-X tunnel
Next: Web browser offerings compared
Discussion Viewing threaded comments | View comments unthreaded, listed by date | Skip to the endPlease login before posting a comment. Use the form on the right to do so or create a free account.
|
Search the archives
Today's featured article
Qercus reviewed but renewed?
Forty months after taking out an annual subscription, Martin Hansen ponders whether or not to continue his Qercus sub
 28 comments, latest by hzn on 3/8/07 4:15PM. Published: 27 Jul 2007
Random article
RISC OS 5 Updates
USB, Video and other fixes [Updated]
5 comments, latest by epistaxsis@work on 20/2/04 8:11PM. Published: 19 Feb 2004
Useful links
News and media:
Iconbar •
MyRISCOS •
ArcSite •
RISCOScode •
ANS •
C.S.A.Announce •
Archive •
Qercus •
RiscWorld •
Drag'n'Drop •
GAG-News
Top developers:
RISCOS Ltd •
RISC OS Open •
MW Software •
R-Comp •
Advantage Six •
VirtualAcorn
Dealers:
CJE Micros •
APDL •
Castle •
a4 •
X-Ample •
Liquid Silicon •
Webmonster
Usergroups:
WROCC •
RONE •
NKACC •
IRUG •
SASAUG •
ROUGOL •
RONWUG •
MUG •
WAUG •
GAG •
RISCOS.be
Useful:
RISCOS.org.uk •
RISCOS.org •
RISCOS.info •
Filebase •
Chris Why's Acorn/RISC OS collection •
NetSurf
Non-RISC OS:
The Register •
The Inquirer •
Apple Insider •
BBC News •
Sky News •
Google News •
xkcd •
diodesign
|
em2ac
