Download Alpha Microsystems Eagle 250 Instruction manual

Beginning an Eagle 250 Upgrade
Page 21
Use /EW without a device ID (to enable Wide operation for the entire bus) only if all devices on
the bus, both disk and tape drives, are Wide SCSI devices.
Do not use the /EW switch with the narrow SCSI bus, even if you have Wide SCSI devices
attached to the bus using the appropriate adapters.
6. Add or modify the DEVTBL statement for the parallel printer port:
DEVTBL /EGP0
To load EGP.DVR into system memory, add the following statement to the SYSTEM area:
SYSTEM DVR:EGP.DVR
7. If the computer is connected to a network, in the SYSTEM area of AM138.INI, add a line to load
the network driver for the Ethernet interface. (Remove any line loading the driver for the old
CPU board.)
To use the AlphaTCP compatible driver, which we recommend in almost all situations, use this
statement:
SYSTEM DVR:AM138.LDV/N
To use the AlphaNET compatible driver, which is necessary in certain configurations, add this
statement instead:
SYSTEM DVR:AM138.NDV/N
The AM-138-10 supports write buffering for SCSI disk drives. If you want to use this feature,
which can improve system performance, please read Appendix B before continuing. You may
need to make additional changes to your initialization file.
8. Save and exit from AM138.INI after making your changes.
STEP 6 - CREATE NEW SUBSYSTEM DISK DRIVERS
In step 4, you created a new disk driver for the DSK device and embedded it in a new system monitor. If
you have any non-DSK disk devices (subsystem disks), you also need to create new drivers for them.
To create the new drivers, use the FIXLOG command. See the FIXLOG sheet in the AMOS System
Commands Reference Manual for instructions.
The AM-138-10 supports read-ahead for SCSI hard disk drives. If you want to use this feature,
which can improve system performance, please read Appendix B before continuing. It will affect
the choices you make while using FIXLOG.
After creating the new disk drivers, be sure to save them to disk.
Eagle 250 Upgrade Instructions, Rev. A00