| Title: | Alpha Developer Support |
| Notice: | [email protected], 800-332-4786 |
| Moderator: | HYDRA::SYSTEM |
| Created: | Mon Jun 06 1994 |
| Last Modified: | Fri Jun 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 3722 |
| Total number of notes: | 11359 |
Company Name : Hytec Electronics - Point 22686
Contact Name : Mark Woodward
Phone : 44 1734 75 7770
Fax : 44 1734 7566
Email : [email protected]
Date/Time in : 18-MAR-1997 09:16:55
Entered by : Richard Readings
SPE center : REO
Category : OpenVMS
OS Version : 6.2-1H2
System H/W : Alpha
Brief Description of Problem:
-----------------------------
We are members of the ASAP program (A60339) and are looking for some help with
an AXP ISA device driver that we are writing. The problem that I have at the
moment is detailed below. Any help you can offer would be welcome.
We are writing a device driver for a National Instruments AT-DIO-32F digital IO
ISA bus interface card. The machine I am working on is an Alphastation 255.
When the interface card is installed in the machine I have to run the ISACFG
utility in order to tell the NVRAM about the device. The device has two
interrupt lines which can be assigned to any two IRQ's. When I assign the two
interrupt lines and reboot the system the network device stops working !
I can assign any single IRQ but not two. What is wrong ?
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 3337.1 | Support added in VMS 7.1 | RDGENG::ddors.reo.dec.com::readings_r | Tue Mar 18 1997 11:40 | 8 | |
Support for 2 IRQs per ISA device was not added until VMS V7.1. If you
attempt to hook up 2 IRQs before V7.1 it will not work. We never
support more than 2 IRQs per ISA device.
Also, you must make sure that the 2 IRQs you are using are not used
elsewhere. In the Alphastaion 200 series the only IRQs available are 5,
10, 14 and 15. IRQ sharing (interrupt sharing) is not supported.
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