home *** CD-ROM | disk | FTP | other *** search
- 08/08/95
- Questions and Answers
- ~~~~~~~~~~~~~~~~~~~~~
-
- Q. How do I change into a "RISC OS 3.1-style" screen mode on my Risc PC?
-
- A. Click Menu over the monitor icon on your icon bar, and choose the "Mode"
- option. If you delete the contents of the writable icon in this dialogue box
- with a Ctrl-U, you can then type in the RISC OS 3.1-style mode number. Most,
- but not all, of the RISC OS 3.1 modes can be accessed in this way.
-
- Q. How do I print in different fonts from !Edit?
-
- A. !Edit will only produce hardcopy in the System font; if you wish to print
- text in a different font, you can save the text into !Draw, change the font
- via the "Style" submenu and print it from there.
-
-
- Serial Ports, Printers and Modems: Part 1
- -----------------------------------------
- There are two main classifications of serial RS232 cable; straight-through
- and crossover. Generally, if the cable is linking the computer to a
- communications device such as a modem, then a straight-through cable is
- used - in other words, one where the transmit line is connected to the
- same-signal pins at either end of the cable, as is the receive line, etc. A
- modem is a piece of Data Communication Equipment (DCE); hence the
- straight-through cable is sometimes referred to as "DTE to DCE."
-
- If the cable is connecting the computer to a peripheral such as a printer,
- then the transmit line from the computer needs to be connected to the
- peripheral's receive line and vice versa; the two lines have to be crossed
- over. A printer is a piece of Data Terminal Equipment (the terminology goes
- back to the concept of a computer which had a number of user-interface
- terminals connected to it by serial lines), and so the cross-over cable is
- sometimes referred to as "DTE to DTE" or "null modem" cable.
-
- In the case of the RISC PC, you should be able to use a standard serial lead
- with a modem and suitable communications packages; for earlier machines, the
- package vendor should be able to supply a lead or information on where to
- obtain one.
-
- !Printers is capable of sending data to a suitable printer via a serial
- link; the printer usually has to be specially configured to receive serial
- data. Your printer manual should show you how the printer's DIP switches
- must be set and which formats of serial word it will accept. The figure
- shows a suitable cable to connect an Acorn serial port to an Apple
- LaserWriter; more serial communications info next month.
-
- Palette Information on the Risc PC
- ----------------------------------
- Some applications, particularly those written for earlier versions of RISC
- OS, can be set to change the video palette information; this may cause
- unusual colour effects on the Risc PC Desktop.
-
- As an alternative to resetting the machine, it is possible to restore the
- colours by finding a sprite which already has the default palette set; the
- palette information can then be extracted using !Paint, and loaded.
-
- Rather than look for a sprite with the palette set, we suggest that you do
- the following before the need to reset the palette arises:
-
- Load !Paint
- Click on the !Paint icon
- Create a new sprite with a 16 colour palette set
- Open the menu over the "newsprite" window, and move to the "Save"
- submenu followed by the "Palette" submenu
- Drag the Palette file to a suitable directory.
-
- If you find that an application corrupts your current palette,
- double-clicking on this saved palette file should at least make the
- Desktop colours usable until you can save your work and reset.
-
- Whoops...
- ---------
- Ive been informed that a couple of errors slipped into the table in September's column.
- The Risc PC / AKF85 combination can actually support 1280x1024 in 4 colours
- with no VRAM, in 16 colours with 1Mb VRAM, and in 256 colours with 2Mb VRAM.
-
- Upgrades
- ~~~~~~~~
- In order to use the A-Link on the Risc PC, you must be running a copy of
- PocketFS Release 2. Upgrades from Release 1 may be obtained from:
-
- Vector Services
- 13 Denington Road
- Wellingborough
- Northamptonshire
- NN8 2RL
-
- by returning your original PocketFS disc, and a cheque for £9.95 inc VAT and
- P&P. Cheques should be made payable to "Acorn Direct."