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- • Colour TV output for Archimedes? If you haven’t got a colour monitor
- and want to use a TV to look at the output from the Archimedes in
- colour, you can feed the signal from the video output into the ‘video
- in’ on a video recorder (always assuming you’ve got one!) and connect
- the ‘RF out’ from the recorder to the TV.
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- • Drive lights on external 5.25“ drives. One reader suggested that to
- avoid the external drive light coming on when I accessed the interal
- drive(s) I should remove all links except DS1 (I use DS2 to make it
- drive2), TO, RR and MS. I followed his advice and it seems to be OK
- now.
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- • 400 or 300? If a piece of software wants to find out if it is running
- in a 300 series machine or a 400 series it can read the MEMC to find the
- size of page being used, thus:
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- program segment missing
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- • More buzzing. One reader noticed that the buzzing from the speaker
- gets worse when you upgrade from a 305 to a 310. Other readers have
- found that the buzz gets to an intolerable level with certain software
- such as ArcWriter. In any case, this is now recognised by Acorn as a
- field change, so your local dealer should be able to sort it out for
- you. If your local dealer is not within easy reach then the “capacitor
- fix” mentioned in issue 3, page 7, is easy enough to do as long as you
- are reasonably competent at soldering.
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-
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- • Printer Acknowledge Line. The IOC (Input Output Controller) has a
- printer acknowledge line which can be read from the ARM supervisor mode.
- However, it is not advisable to ‘play around’ in this area, unless you
- know what you are doing, because some locations are read only and
- attempting to write to them could damage your IOC chip. Here is an
- example program that reads the printer acknowledge line.
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- program segment missing
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- • *TypeFile Command. One reader tried to define an alias which types
- out a file on the printer and then switches the printer off again, but
- he found that it was easier said than done. I set Adrian Look onto it
- and he has managed to find a way of doing it (albeit rather tortuous!):
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- program segment missing
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- then to print out the file, you do a *TypeFile<filename>. The <60> and
- <62> are the ASCII codes for “<‘ and “>”.
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- It sounds a bit long-winded, but what you are trying to do is generate
- ASCII codes <2> and <3> to switch the printer on and off again. When
- you do a *SHOW, it gives the definition of TypeFile as ECHO |<2>|M TYPE
- %0|M ECHO |<3>|M.
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- • “What’s the time, Arthur??” − If you wanted to change the prompt
- which Arthur gives, you could try, for example:
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- *Set CLI$PROMPT >>>
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- and you would get a question mark instead of the star prompt. Then, if
- you want Arthur to tell you time at each prompt, use:
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- *SETMACRO CLI$PROMPT <SYS$TIME>*
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- This prints out the time and then prints the star prompt. The reason
- you use SETMACRO rather than just SET is that it needs to be a variable
- which is up-dated each time the command is used. If you don’t like the
- seconds figure to be included, try:
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- <SYS$TIME><127><127><127>*
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- This prints out the time but then generates three delete characters
- which remove the seconds figures and the colon.
-