From: firewind <firewind AT metroid DOT dyn DOT ml DOT org>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Interrupts bite....wait...yup they do :-)
Date: 7 Oct 1997 23:36:02 GMT
Organization: Netcom
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References: <343892FB DOT 10E2 AT fm-net DOT com>
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To: djgpp AT delorie DOT com
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justin deltener <deltener AT fm-net DOT com> wrote:
> I've finally got around to programming interrupts again, and i'm so DARN
> close i can taste it.  I think my computer is laughing at me.  Anyways
> i'm hooking up into the SB16 sound card and for the life of me i can't
> get it into auto-init mode!  i'm doing the same DSP commands as i was in
> real mode, and i think the rest is correct.  It will play the DMAbuffer
> once and thats it.  No autoinit :-(  Any ideas?

>  NewSB16.pm_offset =(int)SB16_ISR;
>  NewSB16.pm_selector=_go32_my_cs();

> _go32_dpmi_get_protected_mode_interrupt_vector(BLASTER.SBIntr+8,&OldSB16);
>  _go32_dpmi_allocate_iret_wrapper(&NewSB16);

Wait... the Sound Blaster interrupt would be real mode, wouldn't it? So
shouldn't you use: (where rm_regs is a __dpmi_regs created previously in
the function)

_go32_dpmi_allocate_real_mode_callback_iret(&NewSB16, &rm_regs);

> _go32_dpmi_set_protected_mode_interrupt_vector(BLASTER.SBIntr+8,&NewSB16);

and

_go32_dpmi_set_real_mode_interrupt_vector(BLASTER.SBIntr+8, &NewSB16)

[snip-- other stuff looks good]

> everything is being done in the usual way, but i'll be darn if that
> stupid thing will go into autoinit!
> The new interrupt handler function does send an EOI (0x20) and it just
> isn't working for me :(
> Thanks for bothering to read this :)

HTH.

-- 
[- 				 firewind	                            -]
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[- 	    "You're just jealous because the voices talk to -me-."          -]
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