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- Hints and Tips
- 1.1
- Using Electrohome Monitors
- 1.1
- Ian Nicholls of Kidderminster says that the “Electrohome” colour
- monitor, as sold by Opus, works OK on the Archimedes. All you have to do
- is make up the appropriate connector. (Or purchase one from CJE Micros
- or somesuch.) The pin connections for the Archimedes are given on the
- inside back cover.
- 1.1
- Using Modes 18 - 20
- 1.1
- Whilst on the subject of monitors, let me clear up the confusion there
- seems to be in the computer press about the high resolution modes and
- the extra video hardware which the 400 series machines are said to have.
- This extra hardware is NOT for driving modes 18 - 20. Even on the 300
- series, there is all the hardware needed to run these modes on a multi-
- sync monitor.
- 1.1
- The extra hardware in the 400 series is actually for even higher
- resolution graphics − it will go up to 1280 by 976 pixels in monochrome
- (160 characters by 122 lines of text) and, as with modes 18 - 20, it
- requires a special monitor. There is no industry standard for such
- monitors, and Acorn are still looking into providing a suitable monitor
- with their own badge on it. This extra high resolution is of course
- aimed at the CAD (computer aided design) market, and it is said that
- AutoCAD is being translated onto the Archimedes.
- 1.1
- Using a Multi-sync Monitor
- 1.1
- If you have a multi-sync monitor and want to get it working on the 300
- series, all you need to do is to switch the computer on whilst holding
- down the <R> key. This resets the CMOS RAM settings (so if, like me, you
- had changed them, you will have to re-configure again!) and it changes
- the configuration of the RGB output to run in multi-sync mode. It then
- allows you to access the extra screen modes that had been previously
- forbidden to those of us who only have standard monitors. If you should
- want to change the machine back again to run a standard monitor, you
- have to do another <R-power-up> which switches it back again (and re-
- sets the CMOS RAM settings AGAIN!). In other words each time you do an
- <R-power-up> it toggles between the two monitor settings.
- 1.1
- Using View
- 1.1
- Gerald Jones of Northampton tells us that only those of you who have
- gone from a Master Compact to an Archimedes will be able to get View
- going − for the time being, at least, because the ROM versions of VIEW
- will not work under the emulator. If you do have a disc version of View,
- Acorn tell us that the way to get it going is to copy 65ARTHUR from the
- MODULES directory on the Archimedes Welcome disc onto another disc and
- VIEW from the Compact Welcome disc and then use *BUILD !BOOT to create
- a boot file which consists of:
- 1.1
- *65ARTHUR
- 1.1
- *GO F800
- 1.1
- *LOAD VIEW 8000
- 1.1
- *GO 8000
- 1.1
- and then remember to type *OPT 4,3 to set it up so that it will execute
- the boot file on <shift-break>. All you have to do then is to chop up
- your VIEW keystrip and stick it together in the Archimedes keyboard
- format remembering that the f0 key functions are now on the <print> key!
- 1.1
- Attaching a 5.25“ drive
- 1.1
- Have you tried to get a 5.25“ disc drive linked up to the Archimedes?
- Presumably, you did the obvious thing and removed the cable from the
- p.c.b. to the 3.5” drive and plugged in the cable from the 5.25“ drive.
- And you too found that it didn’t work! Well, the official answer is that
- it is possible to connect a 5.25” drive but that there are “different
- connections”. Actually, it seems that the only difference is that they
- have put the connector in the opposite way round!
- 1.1
- Unfortunately, you can’t just turn the connector round because of the
- location lug on the side of it. The solution is either to file the notch
- off the side of the connector so that it will go in either way round, or
- buy a new 34-way insulation displacement connector which you can crimp
- onto the end of your disc cable, the opposite way round from the
- existing one, or buy a disc extension cable from a supplier such as CJE
- Micros (£15 + £1 p&p − address in Fact-File at the back of the
- magazine). The advantage of doing it that way is that the extension
- cable is long enough to stick out at the back of the computer through
- the podule connection slot so that you can connect and disconnect the
- extra drive without taking the lid on and off.
- 1.1
- You can, if you want, put a single 5.25“ drive as drive 1 or a pair of
- drives as drives 1 and 2. The extra drives must, of course, have their
- own power supply units and you need to type *CONFIGURE FLOPPIES 2 (or 3)
- so that the ADFS knows how many drives there are. You will also need to
- get inside the 5.25” drives in order to change the link settings to
- configure them as drives 1 (and 2) and you should also, theoretically,
- remove the terminating resistors − usually a set of resistors (dual-in-
- line or single-in-line) near the drive-select setting links. This is
- because there are already terminating resistors in the internal 3.5“
- drive and you should not have two sets. If you have a dual drive where
- they are on top of one another rather than side by side, you may find it
- difficult to get at the second drive in order to change the link
- selection. If so, the easiest solution is to make the top drive 2 and
- just remember that the lower drive is drive 1.
- 1.1
- One problem you may still find (which Acorn haven’t yet managed to
- explain) is that if you switch on the power to the disc drive before or
- at the same time as the computer, the computer seems unable to start up
- − you just get a blank screen. All you have to do though is to make sure
- you switch the computer on first and then the disc drive. You will also
- find that the desk-top program does not recognise the third drive − even
- if you have typed *CONFIGURE FLOPPIES 3, it only displays two disc icons
- on the screen. (If anyone works out how to modify the program to
- recognise all three, let me know.)
- 1.1
- ADFS bugs
- 1.1
- There are one or two bugs in the ADFS, though they are apparently
- reasonably obscure. The only one I have found myself is that if you try
- to *BUILD a !BOOT file onto a disc that already has a !BOOT file and you
- have left the disc write-protected, when you press <escape>, the system
- hangs up and you have to press <ctrl-break> or reset to escape. Some of
- the bugs have been corrected on the 0.03 version of the ADFS that you
- will find in the MODULES directory on your Welcome disc. This version
- will have to be *RMLOAD’ed, then to check that you have got the right
- version installed, type *HELP MODULES which gives you the current
- version numbers of all modules. It should say ADFS 0.03 (17 Jun 1987)
- instead of ADFS 0.02 (05 Jun 1987). Incidentally, the file name on the
- Welcome disc is Adfs0-03, not Adfs0_03 as you might tend to expect, so
- if you get a file not found error, check that you have typed it
- correctly.
- 1.1
- Have you discoveredÉ?
- 1.1
- I’d like this to be a regular feature. It consists of the sort of things
- that may be obvious to some people, but perhaps that you’ve noticed from
- reading the User Guide (or the Programmers’ Reference Manual when it
- becomes available). If you find something that you thought, “Well, I
- didn’t realise that!’, let us know. I’ll start it off this month with
- things that were new to me.
- 1.1
- • The pad character “|” which is the shifted back-slash character (the
- key just above the return key) can be used to “pad” out those incredibly
- long VDU codes that end with lots of zeros. For example, to switch off
- the cursor, you can use VDU23,1,0,0,0,0,0,0,0,0,0 which can admittedly
- be shortened to VDU23,1,0;0;0;0; can now be reduced to VDU23,1| which
- has the extra advantage that you don’t have to try to remember exactly
- how many zeros it needs to complete the command.
- 1.1
- • Instead of saying value=value+extra, you can use the new operator
- “+=” and say value+=extra which is a significant saving if, like me, you
- tend to use long variable names; likewise with −=extra. (Well with
- “604412 bytes remaining”, it may not be worth worrying about memory
- space, but it does save on printer ribbons!)
- 1.1
- • DANGER! • BEWARE! • WARNING!!!!!
- 1.1
- Newcomers to ADFS beware! If you have been using *WIPE * and looking
- through and saying “yes” or “no” to each, Don’t try it on ADFS! You will
- find that *WIPE * deletes ALL the un-locked files in the current
- directory. It’s like *DESTROY * but without even displaying a list of
- all the files it was about to delete and asking for confirmation. I
- discovered this ‘nasty’ the hard way − I lost about 10 programs at a
- stroke.It wasn’t too bad though as I had copied them across from DFS and
- only modified one or two.
- 1.1
- What you should say is *WIPE * C where the C stands for “Confirm” − then
- it asks you about each file in turn. − You have been warned!!!!
-
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