Re: enabling x87 interrupts

Rod Pemberton <spamtrap@xxxxxxxxxx> wrote:
: "Wendy E. McCaughrin" <spamtrap@xxxxxxxxxx> wrote in message
: news:ecklk5$psb$1@xxxxxxxxxxxxxxxxxxxxxxxxxx
: > Is the 8259A (PIC) still used to enable interrupts? I unmasked

: "Unmasked" meaning clearing the bit (i.e., zero or low). All bits not
: triggering interrupts should be set (i.e., one or high).

: > bit #2
: > in the master PIC and bit #5 (a.k.a. #13) in the slave PIC it cascades
: > with, to enable FPU interrupts. I have unmasked all 6 exceptions in the
: > FPU's control-word and use STI. Yet, INT 75h is never accessed.
: >

Right. That is what I did: AND'd to zero out the 6 exception-flags in
the FPU's control-word and also bit #2 in PIC-1, bit #5 in PIC-2.

.

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