Digital Equipment Digital AlphaStation 400 Series, User Information

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Console Commands
ISA Configuration Utility
ISA (industry-standard architecture) devices are not capable of being probed for
configuration information by the DEC OSF/1 or OpenVMS operating systems. Therefore,
you must enter ISA option information manually using the ISA configuration utility
(ISACFG). Run this utility before installing a new ISA option module on a Digital
AlphaStation 400 Series system running either the DEC OSF/1 or OpenVMS operating
systems.
The Digital AlphaStation 400 Series system has five IRQ levels available for ISA and PCI
expansion (5, 9, 10, 14, and 15). Prior to adding an ISA device, you must use ISACFG to
assign an IRQ to the device. Make sure to leave enough IRQs unassigned to meet the
needs of your PCI devices. (The embedded PCI-based SCSI controller is assigned
automatically to IRQ11.) For example, if your system has two PCI slots occupied, you can
add up to three ISA devices. You can add a fourth ISA device if ISACFG is used to
disable another ISA device, such as the COM2 port. Disabling the COM2 port makes
IRQ3 available for the new ISA device.
Command Format
The syntax of the ISACFG command is shown below:
isacfg [-slot <slot#>] [-dev <device#>]
[-all|-rm|-mk|-mod] [-<field> <value>] . . .
The ISACFG command options are described in Table A-14.
Table A-14. SRM ISACFG Command Options
Command Option Description
-all Shows the entire configuration table. Overrides all other
commands.
-dev <dev#> Optional; defaults to 0 if not entered. On a multifunction or
multiport adapter, this specifies the device on the adapter.
-dmachan{0-3} <#> Allows you to specify up to four DMA (direct memory access)
channels for the device.
-dmamode{0-3} <#> Allows you to specify the DMA type for -dmachan{0-3}. DMA
modes are:
1 - Block
2 - Demand
4 - Single
8 - Cascade
A-17