Help with floppy drive interrupts

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2 total messages Started by hakimian%tek4 Thu, 29 Nov 1990 21:34

#7105

Author: hakimian%tek4
Date: Thu, 29 Nov 1990 21:34

11 lines
912 bytes

According to the RKM's the interrupts from the floppy port DSKSYNC & BLKDONE
(sp?) are serviced by handlers. If I wanted to handle these interrupts with
my own code I would have to replace the handler with mine. In order to keep the
system running properly (i.e. be able to use the floppies) what would I have
to do in my handler? Could I simply add my code to what is there? If so how?
Is what the system does with floppy drive interrupts documented someplace?

Thanks.

Karl Hakimian
hakimian@yoda.eecs.wsu.edu

Re: Help with floppy drive interrupts

#7564

Author: Randell Jesup
Date: Wed, 19 Dec 1990 01:30

20 lines
1656 bytes

In article <9011292134.AA25742@tek4> hakimian%tek4@YODA.EECS.WSU.EDU writes:
>According to the RKM's the interrupts from the floppy port DSKSYNC & BLKDONE
>(sp?) are serviced by handlers. If I wanted to handle these interrupts with
>my own code I would have to replace the handler with mine. In order to keep the
>system running properly (i.e. be able to use the floppies) what would I have
>to do in my handler? Could I simply add my code to what is there? If so how?
>Is what the system does with floppy drive interrupts documented someplace?

	Most of the disk-related interrupts are arbitrated by disk.resource.
Read the docs on GetUnit.  Most things have little reason to use the
DISKSYNC interrupt - interrupt latency alone will kill you.  See the docs
on INDEXSYNC in the description of RAWREAD/RAWWRITE.  (Actually, I'm not
even certain there is a DISKSYNC interrupt - sure you didn't mean index sync?)

-- 
Randell Jesup, Keeper of AmigaDos, Commodore Engineering.
{uunet|rutgers}!cbmvax!jesup, jesup@cbmvax.commodore.com  BIX: rjesup  
The compiler runs
Like a swift-flowing river
I wait in silence.  (From "The Zen of Programming")  ;-)

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