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SCSI settings and devices |
Help linksAleph One Support recommendations.SCSI configuration ASPIInstalling the Windows 95 / 98 SCSI (ASPI) driver ASPI with DOSSCSI cardsAlsystem Power Tec cards and upgrade ROMSSCSI devicesScanners |
Do not use a DOS formatted SCSI hard drive as drive C:. All the reasons are coverd in Disc setup pages. For access to a DOS formatted SCSI use ASPI.
RISC OS systems that BOOT from a SCSI hard drive may find that they have problems due to !PCconfig SCSI setting required to make a device work and that !Boot is needed by the PC card to function. It is less problomatical if RISC OS Boots from an IDE hard drive. The reasons for this will be coverd in the SCSI configuration section on "Reserve" and "Reserve Forced".
Where at all possible keep all working partitions or RISC OS software required for the PC card to operate on an IDE hard drive. Only use a RISC OS formatted SCSI for partition backups and RISC OS software that is NOT required for the PC card to function. Again reasons for this will be coverd in the SCSI configuration section on "Reserve" and "Reserve Forced.
All SCSI devices should be powerd up before you start to use the PC card even if the device is not going to be used by the PC card. Many devices will not communicate correctly regardless of the configuration settings causing other devices in the SCSI chain to fail.
Any removable drives should not contain a RISC OS formatted disc unless the SCSI settings are set to "Ignore" for the drive unit.
You must ensure that the a SCSI terminators are only at the ends of the SCSI chain. I personally use a SCSI terminator block at the ends of my SCSI chain.
Ignore
Setting any device to Ignore will mean that the PC card will not be able
to see or have access to the device. All RISC OS formatted fixed hard drives
should be set to "Ignore".
If this was set for the host then NO SCSI device could be used as the SCSI
card that controls and communicates with the devices is not available to the PC card.
Reserve
This makes a device only available to the PC card while !PC from PCPro3 all
versions, remains on the icon bar. Only when !PC is quit will the device be
released to RISC OS. Again this includes the host, if this is set, NO devices
will be available to RISC OS even if a device is set to "Ignore". This can
cause problems if a RISC OS hard drive has software that is required for
the PC card to function but is contrioled by RISC OS which because of this
setting has just lost contact with the device. All SCSI devices that normally
show on the RISC OS icon bar may be grayed out to show that it is
unavailable.
Reserve Forced
This is the same as "Reserve" but it gives the device a little kick to
make it function. Many SCSI scanners need this set.
No Settings
In theory at least this means that the device should be able to be used by
RISC OS or the PC card while the PC card is running, so that you could go
back and forth between using the device for RISC OS or the PC card without
the need to quit !PC. In practice this can fail to function with a device
or that we tend to use a device for RISC OS or the PC card but not both.
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If you’ve done this successfully, you will be able to use your SCSI devices from Windows 95 applications; you will also see any SCSI CD-ROM drives appear in ‘My Computer’.
Quit !PC with an error message:
Error
Application may have gone wrong, etc.
Describe:
Internal error: abort on data transfer at &038096Ce
This provokes the inability to initialize all other programs, giving the same message. Only solution: switch off computer.
The culprit:
Installation of PowerTec's Power ATAPI CDFS driver.
You must ensure that the configuration is correct and that you are using
the correct ATAPI driver. The PowerRom upgraded for Acorn SCSI card with the
Acorn ATAPI in use ensures that !PC quits correctly.
The Umax Astra 1200S scanner Rev. 2.9 works with Win95 (OSR2) and PCPro 3.02 on a CJE 586 133 512 card using 32bit ASPI (Miniport) drivers with Win Umax drivers found on Umax Astra Scanners (SCSI) CD version 1.14, but NOT with Umax Scanner CD version 1.08.
From: Philip Draper Subject: Epson scanner GT9000
After ensuring that Philip had PCPro 3 and the latest 32 bit ARMASPI dated 10th Dec 1998 he also downloaded the latest TWAIN and Epson scanner driver from their Web site.
Andreas Walter suggested adding the External Buffer from PCConfig. Hey Presto - everything now works smoothly.
This is normally the default.
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