Xref: utzoo comp.lang.c:20271 comp.sys.ibm.pc:32378
Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!wasatch!helios.ee.lbl.gov!nosc!cod!bmarsh
From: bmarsh@cod.NOSC.MIL (William C. Marsh)
Newsgroups: comp.lang.c,comp.sys.ibm.pc
Subject: Re: interrupt type in Turbo C
Summary: interrupt supported with small mods
Message-ID: <1591@cod.NOSC.MIL>
Date: 31 Jul 89 18:46:55 GMT
References: <2388@pur-phy>
Distribution: na
Organization: Naval Ocean Systems Center, San Diego
Lines: 52

In article <2388@pur-phy>, murphy@pur-phy (William J. Murphy) writes:
> I am woking on a program to interface with a DataTranslation board
> from my Zenith PC 386.  I came across a type of variable which I know
> nothing about.  The program was written in Turbo C and TC uses a type
> interrupt.  I looked at the manual for TC and found that this is specific
> to TC, so my question is how would I implement this in MicroSoft C 5.1?
> I have little experience programming interrupts, in fact this is 
> my first time in MS-DOS.
> 
> 
> /* Function Prototypes */
> void interrupt DTintHandler(unsigned bp, unsigned di, unsigned si,
> 			    unsigned ds, unsigned es, unsigned dx,
> 			    unsigned cx, unsigned bx, unsigned ax);
> void InitInt( int vector, void interrupt (*haddr) ());
> 
> 
> void interrupt DTintHandler(unsigned bp, unsigned di, unsigned si,
> 			    unsigned ds, unsigned es, unsigned dx,
> 			    unsigned cx, unsigned bx, unsigned ax);

'interrupt' functions are supported by MSC 5.1, however, the only
documentation is in the 'readme' file on the setup disk...  The only
difference between Turbo C and MSC is that in Turbo the function is
automatically made 'far', which is smart (MSC you *have* to say far),
and the register contents are placed on the stack in a different order.
(Here MSC is better, if you tell it to make 186 or 286 code, it can do
a pusha/popa)

Here is an example of the beginning of a critical error handler I wrote
in C (both...)

static void interrupt far
#ifdef	__TURBOC__
crit_error(bp, di, si, ds, es, dx, cx, bx, ax)
unsigned bp, di, si, ds, es, dx, cx, bx, ax;
#else
crit_error(es, ds, di, si, bp, sp, bx, dx, cx, ax, ip, cs, flags)
unsigned es, ds, di, si, bp, sp, bx, dx, cx, ax, ip, cs, flags;
#endif
{

Hope this helps!

Bill
--------

Bill Marsh, Naval Ocean Systems Center, San Diego, CA
{arpa,mil}net: bmarsh@cod.nosc.mil
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