| Title: | * * Computer Music, MIDI, and Related Topics * * |
| Notice: | Conference has been write-locked. Use new version. |
| Moderator: | DYPSS1::SCHAFER |
| Created: | Thu Feb 20 1986 |
| Last Modified: | Mon Aug 29 1994 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 2852 |
| Total number of notes: | 33157 |
I picked up an ATI EGA Wonder Graphics card for my IBM PC a few weeks ago. In reading the installation instructions, I found a paragraph that said this card (and it sounds like any EGA card) can't be used with another card that uses IRQ2. This happens the be the same interrupt that the Roland MPU-401 uses. Am I doomed to CGA forever or is this not a concern? I can't change the interrupts, because I don't have any left. Any ideas from someone a little more PC literate than me would be appreciated. Geoff
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 2375.1 | TROA01::HITCHMOUGH | Mon Jun 25 1990 12:08 | 10 | ||
I seem to remember from my PC hacker days that the 401 used the
prototype card interrupt. I cant remember the number but it seems
strange that a video card would use this one. The numbers 7 or 9
seem to come to mind (it was on the SECOND interrupt controller
chip on the AT).
Have you tried it?
Ken
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| 2375.2 | XT, not AT | CSG001::ROACH | Teenage Mutant Ninja Marketeers | Mon Jun 25 1990 12:25 | 5 |
This computer is an XT not an AT. The MPU-401 uses interrupt 2 (IRQ 2), as does this (and most other EGA cards, I think). That's what I think is the problem. Geoff | |||||
| 2375.3 | lucky seven | CANYON::XEROX | on the horns of an enema | Mon Jun 25 1990 15:13 | 13 |
Geoff,
like someone suggested two replies before this one, you should
use IRQ 7, if possible. This interrupt is generally assigned to
LPT1, but most software does not enable the interrupt; program
I/O is commonly used to drive this port. This pearl of wisdom
gleaned from the Cakewalk installation directions.
John Stewart
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| 2375.4 | "we got yer MPU-401 & EGA workin'!" | SMOGGY::TURNER | Mon Aug 06 1990 22:12 | 6 | |
Geoff,
Relax! I've been running an MPU-401 in my IBM/AT compatible
with EGA for about a year with no worries!
Paul
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