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- Questions and answers
- ---------------------
-
- Q: When I try to access a CD using !PhotoView, I get the error
- CDFS::0.$.PHOTO_CD.OVERVIEW/PCD not found; what's the solution?
-
- A: !PhotoView is not finding the file containing the index information
- for the pictures on the PhotoCD. First check that you have a PhotoCD
- in your drive. Corel Professional PhotoCDs do not have an Overview file
- on the disc; individual Image Pacs may, however, be accessed using
- !ChangeFSI. If your PhotoCD is not a Corel disc and the Overview file
- cannot be found, consult your PhotoCD's supplier.
-
- Q. How do I delete an unformatted or non-bootable PC hard disc partition
- via the Desktop?
-
- A. To delete an unformatted PC hard disc partition you need to either
- format then delete the partition, or go to the command line (F12 from
- the Desktop) and type:
-
- *SETTYPE <Your partition's pathname> Text
- *DELETE <Your partition's pathname>
-
- Q. Is there a system variable which I can access to find out what the
- Currently Selected Directory (CSD) is set to?
-
- A. Yes, provided you have RISC OS 3.1. Fileswitch$ADFS$CSD contains the
- ADFS CSD pathname; if you use a different filing system, change the
- appropriate part of the variable.
-
- More than Music
- ---------------
-
- CD ROM is a wonderful medium for software which requires a large amount
- of resource data, and there is now PhotoCD, but you can play audio CDs
- too! Most CD ROM drives have an Audio Out connector, which produces a
- signal suitable for feeding into an amplifier. Otherwise, most CD ROM
- drives have a jack on the front for headphones; you can attach a pair
- of "active speakers" of the kind used with personal stereos to this.
-
- CD ROM drives which are fully supported by Acorn's drivers are:
-
- SONY CDU6111, CDU6211, CDU541, CDU561
- PHILIPS CM131, CM231
- TOSHIBA XM2200A, 3301
- HITACHI CDR1650S, CDR1750S
- CHINON CDS-431
- APPLE CD300 (driver available from Acorn dealers)
-
- PhotoCD is available using the Philips CDU541 (single-session only), the
- CDU561 and the Apple CD300 (multi-session).
-
- Further drive and driver combinations are available from third party
- suppliers.
-
- CD ROMs for DOS-based systems can be accessed directly using CDFS via DOSFS
- under RISC OS. PC Soft can access CD ROMs using MS DOS and MSCDEX. Note
- that MPC discs cannot currently be played on an Acorn platform, as there
- is no support for a SoundBlaster-compatible card.
-
- The vast majority of CD ROMs for all platforms are written using the standard
- ISO9660 or earlier High Sierra standard formats; CDFS can read both of these.
-
- Choosing SIMMs for Risc PC: A Checklist
- ---------------------------------------
-
- The Risc PC marks an enhanced level of conformance to popular standards for
- Acorn, in that DRAM may be fitted as SIMMs (Single Inline Memory Modules).
- Hence you can buy DRAM for your Risc PC from many more suppliers, but make
- sure that the SIMMs you are considering conform to at least this outline
- specification:
-
- 72 contact pins, with 32 bit data
- Speed of 70ns or faster
- Physical size 108mm long, 36.2mm wide and 9.4mm thick
- Memory must be mapped as a "square array" (same number of row and column
- addresses)
- 16 or less physical ICs on each SIMM
- DRAM devices must support "fast page mode" and "CAS before RAS refresh."
-
- Further details on suitable SIMMs are contained in an Application Note; this
- is available via Acorn support channels (eg dealers).
-
- VRAM (Video memory) is installed on proprietary cards, and hence is only
- available via Acorn and a smaller number of third parties.
-
- Did you know?
- -------------
-
- Some difficulties in running new software may be the result of the software
- requiring the latest versions of relocatable modules. Current versions of
- some modules for RISC OS 3.1 are:
-
- ColourTrans 1.57 (Supplied with !Printers 1.22)
- FPE400 4.03 (For users of the FPA10 Floating Point Coprocessor)
- CLib 3.75
- SCSIFS 1.10
- CDFS 2.21
-
-
- In the case of all except SCSIFS and CDFS, upgrades to these versions are
- available via ftp.acorn.co.uk, as well as via Acorn dealers. The latest
- versions of SCSIFS and CDFS are supplied as part of the PhotoView package,
- available from Acorn dealers as Product Code AKA35, price £34.95.
-
- The latest versions compatible with RISC OS 2 are available as part of the
- RISC OS 2 Extras disc, available from the same sources.
-