e00b019.pdf

P.O.Box 190

READERS’ CORNER

We can only answer questions or remarks of general interest to our readers, concerning projects not older than two

years and published in Elektor Electronics . In view of the amount of post received, it is not possible to answer all let-

ters, and we are unable to respond to individual wishes and requests for modiﬁcations to, or additional informa-

tion about, Elektor Electronics projects.

Oscar MP3 Player

Dear Editor, correct me if I’m

wrong, but is the data given in

Table 2 (IDE Register Set) not

incorrect in that /CS1FX and

/CS3FX are transposed. All of the

research that I have conducted

into this area I’m also developing

a MP-3 Player) suggest that the

data is transferred to and from

the dive when /CS1FX is active.

Data is transferred to and from

the dive when /CS1FX is active.

See http://minyos.its.rmit.edu.au/

~s990678/pic/IDE_to_8255.html

or http://www.prjc.com .

choice for interfacing and access-

ing the PC ports and others.

Delphi is easier than VB, can

access the ports easy through sim-

ple and short in line assembler

routines, is fast and does not need

any runtime or other .dll ﬁles.

At this time Delphi is inexpen-

sive to get, and I’m sure that

most of your readers should

have it along VB and others.

Actually, computer magazines

like PC Plus supplied Delphi 1, 2

and 3 on their covers in the last

year or so.

Anyway, it’s always good to be

wishing, but you never know...

Keep up the good work.

Alexandre Cazin, by email

and readers being unable to

save the ﬁle from there. We gave

out instructions to readers to

right-click on the download but-

ton, change browser settings

etc, but to no avail, we still got

hundreds of questions about this

every week. You have to realise

that our downloads go by the

thousands every day and not

everyone is experienced enough

to solve such a problem, while

we do not have the time to deal

with individual enquiries. So for

that reason we decided to

change to .exe files only. Also,

we can not assume just like that

that everyone has Winzip.

this case, the corrected url is

available as hyperlink from our

website, so you need not even

type into your browser.

Twinkling GSM antennas

Dear Editor, regarding the ‘Twin-

kling’ antenna type of call indi-

cator mentioned in the ‘GSM Call

Indicators’ instalment of your

series E-Insider, you may wish to

look at the following references

and attachments and maybe

publish a warning about their

effects in a future edition. This

information is being posted

purely in a personal capacity as a

subscriber and reader of Elektor

and not in any official capacity.

The information attached is pub-

licly available from the Radio

Agency’s (RA) website.

http://www.radio.gov.uk/busunit/

ptnu/cellular/index.htm

http://www.radio.gov.uk/busunit/

research/rtcg_564/proj564.htm

Martin King, by email

Richard Broughton,

by email

Moving urls…

Dear Editor, I was unable to find

the Visual BASIC webpage you

mentioned in your otherwise

excellent article “USB Interface’.

Grace McLeigh.

The OSCAR design team replies:

Thank you for your suggestion, it

has been copied to our design

staff.

The signals /CS1FX and /CS3FX

are “ active low “ which means

that if they are active the actual

voltage level on the line is low.

So, in the table, the DATA regis-

ter is listed with /CS1FX = ‘1’

which means that as it is active-

low the level on the line would

be low.

Vladimir Pantelic,

by email

Size, does it matter?

Dear Editor, I have just had a

quick look around your website,

and decided to download a file —

the one I downloaded was

000122-11.exe, a self extracting

zip file (size about 47K). When I

ran this I got the PDF file — size

23K! Why do you convert a file to

be a self-extracting zip, if the

resulting file is bigger than the

original?

Mark Fiddament,

by email.

Apparently Microsoft moved the

information to

http://msdn.microsoft.com/

downloads/default.asp?url=/

code/sample.asp?url=/msdn-

files/027/000/133/msdncom

positedoc.xml

All readers should note that urls

printed in the magazine are sub-

ject to moving by their origina-

tors. Using the Hyperlinks page

on our website at

http://www.elektor-electro

nics.co.uk we will do our utmost

to keep track of moved urls, and

publish an alternative or cor-

rected url whenever possible. In

Thank you for warning note, the

technical report you attached

with your email, and the hyper-

links to further information on

the subject. Readers should note

that our description of the ‘twin-

kling’ GSM antenna variety does

not imply that we encourage its

practical use. Indeed, based on

the above mentioned report its

use should really be banned

mainly because of the higher

harmonic signal levels gener-

ated as a result of transmitter

output mismatching.

Delphi programming, please

Dear Editor, I have been reading

Elektor for the last 10 years and

the articles and projects are great.

I was pleased to see the PC

Peripheral Design and the USB

projects. However, I think (and

hope) that the Delphi program-

ming language would be a better

In the past we’ve had serious

problems with pdf documents

opening automatically and inad-

vertedly in browsers like IE5.0,

11/2000

Elektor Electronics

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