Date: Tue, 28 Jul 1998 23:53:01 +0200 (MET DST)
From: Gisle Vanem <giva AT bryggen DOT bgnett DOT no>
To: djgpp AT delorie DOT com
cc: soltesz AT hotmail DOT com
Subject: Re: CWSDPMI: slow IRQ wrapper
Message-ID: <Pine.UW2.3.95.980728235229.26664A-100000@bryggen.bgnett.no>
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Archee/CoNTRACT <soltesz AT hotmail DOT com> said:
 
> IRQ wrapper of CWSDPMI sets up a new stack for the app, however
> the app can have big stack and little IRQ handler.
> When I use other extenders there is no so many code at the IRQ handler
> header.
 
Which other extenders do you mean? All extenders usually do lot of things
before the application interrupt handler is called.
 
> When I use DJGPP, I use the _go32_dpmi_allocate_iret_wrapper, which is
> very slow when I code a program to use serial port.
 
I've used it for serial IRQ handler running at 115kb/s without loosing
any characters (although I enable FIFO). So to say it' very slow is rather
unfair. The wrapper simply eases writing interrupt handlers safely.
 
Gisle V.