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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!)
- 1.2
- !&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”!
-