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Archive Magazine CD 1995
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1995-02-16
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Hints and Tips
RGB Connector
Hugh Nolan, of Old Roan, Liverpool, writes, “The pinout for the RGB
connector on page 18 of Archive 1.1 indicates that it follows that of an
IBM PGA rather than the more common EGA standard. If anybody has a
monitor supplied with a lead for use with an EGA and wishes to build a
new cable they should note that the EGA pinouts are as follows:
1.2
1.2
1 Ground 6 Secondary Green/Intensity
1.2
2 Secondary Red
1.2
3 Red 7 Secondary Blue/Mono
1.2
4 Green 8 Horizontal Retrace
1.2
5 Blue 9 Vertical Retrace
1.2
I am currently using such a monitor with my BBC model B and the
connections are fairly straightforward except that the BBC’s connector
does not have separate vertical and horizontal syncs, so I have wired
the composite sync to pin 9 (Vertical Retrace) of the monitor.”
1.2
Using a multi-sync monitor
1.2
A much easier way to change to a multi-sync monitor is to use:
1.2
*CONFIGURE MONITORTYPE 1 and
1.2
*CONFIGURE MONITORTYPE 0 to switch back to the normal monitor.
1.2
Epson screen-dumps
1.2
No doubt you have discovered the modules called HardCopyFX, MX and RX,
and you too have discovered that they don’t work! Gerrald Fitton has the
answer for us. His bug-fix has been passed on to Acorn who are also
circulating it. The recipe is as follows:
1.2
*LOAD Modules.HardCopyFX 10000 (that’s four noughts - beware of using
three!)
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!&104E0=&E59C1020
1.2
!&104E4=&E20100FF
1.2
(now replace the disc for the one onto which you want to put the hard-
copy module)
1.2
*SAVE HardCopyFX 10000 + 700
1.2
*SETTYPE HardCopyFX &FFA
1.2
*STAMP HardCopyFX
1.2
To use the module, *RMLOAD HardCopyFX (or just *HardCopyFX will do) and
then call it with *HardCopyFX plus various parameters − *HELP HardCopyFX
will show you what all the parameters are. Has anyone been experiment
ing with it? What do all the parameters mean and what are their ranges?
(Landscape, XScale, YScale, Margin and Threshold)
1.2
Avoiding constant use of *MOUNT
1.2
If you, like me, have a number of different discs and you can’t remember
what is on which, you will probably be fed up of having to type *MOUNT
each time you change the disc before you can get a catalogue. Try
*CONFIGURE NODIR and <ctrl-break> and you will find that as long as you
haven’t gone down to lower directories, you can just change the disc and
do a *CAT (or *. works as on the BBC micro) and it will re-catalogue the
disc in the drive. For more details, see James Lynn’s article about
*CONFIGURE.
1.2
File copying problems
1.2
There are one or two problems with the *COPY command under the 0.2 and
0.3 operating systems but, not being used to using ADFS myself, I am
never sure when it is a bug and when it is me being stupid. One thing
you will find though is that when doing a *COPY from disc to disc using
a single drive, it seems to hang up when it should be saying “Enter
source disc and press the space bar” but don’t panic, it’s probably
still OK and it’s just that the prompt has not been printed. Replace the
disc you were expecting to put in next and press <space> and I think you
will find that it carries on OK. If you haven’t discovered how to do
disc to disc copying on one drive, see the “Have you discovered”
section.
1.2
File transfer problems
1.2
If you are still having problems getting files across from other
computers to the Archimedes, we have received one or two programs from
subscribers. There is not enough space to print them in this issue, but
if you drop us a line, we could send you a listing.
1.2
Attaching a 5.25“ disc drive
1.2
Acorn have told us that they would not recommend us to do this as the
disc drive hardware in the computer is only designed to drive 3.5“
drives with low control line loading and that if you want to attach a
5.25” drive, you should have suitable buffer circuitry added. The
feedback we are getting for subscribers is that most of you are having
success with this, though one person said that one drive he attached
would not work whilst another one did and another person actually blew
up the driver chip in the Archimedes. So, it’s up to you, but in the
light of these comments from Acorn, it would clearly be a good idea to
remove the pull-up resistors on the auxilliary drive.
1.2
(For an alternative, check the “Hardware Available” section to see what
Brainsoft have done to get round the problem.)
1.2
Three floppies on the desktop
1.2
In order to get three floppies on the desktop, i.e. assuming you have
added a double 5.25“ disc drive, Gerrald Fitton again comes to our
rescue. “In the BASIC library program called
$.desktop.accessory.filehandlr you will find that lines 130 and 140
accept the first and second floppies, so you will need an extra line:
1.2
145 IF floppies%>2 THEN PROCsys _addtoiconbar_left(“floppy2”,É
1.2
etc as per lines 130 and 140 and you will have to make a further copy of
lines 290 to 420 (which refer to floppy 0) emulating the changes made to
generate lines 430 to 560 which refer to floppy 1 by inserting “2” in
the appropriate places.
1.2
Fortran 77
1.2
Tom Fortescue warns potential purchasers of Fortran77 that (a) it needs
at least 1Mbyte and is therefore unusable on the A305 (I haven’t been
able to check this with Acornsoft.) and (b) it does not come with an
editor, so unless you’ve got View or Wordwise or Inter-Word or somesuch,
you won’t get very far with it!
1.2
Stereo speakers
1.2
Enoch Mayer says that he has bought, for around £25, a couple of
“Realisitic” (Tandy) amplified speakers designed for use with personal
stereo radio/tape players. (Model: Minimus-0.6 amplified speaker system
Cat N¼ 40-1259E) Although they run off two sets of four size-C bat
teries, they can easily be adapted to run off small battery eliminators.
They tone in nicely with the Archimedes, but the best thing is that when
no sound signal is received they automatically shut off, thus eliminat
ing the “fuzz”!