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- In article <4ipcd9$24l@sun1000.pwr.wroc.pl> st103@sco.zsi.pwr.wroc.pl (A Member of Elysium) writes:
- > I remember from okd days that there was an 68010 emulator for 68000. If i
- > remember good it was based on the fact that there is an interupt when
- > procesor meets an unknown command and ib than interrupt one could do the
-
- Would be a bit difficult for some things... Normal (?) buss exception
- errors couldn't be emulated because the instruction pointer/registers couldn't
- be backed up to the start of the instruction on 68000...
-
- > emulation. Is this possible to do th same with the Math coprocessor?
- > It could be vary good for many of us, not having an 68882..
-
- The "line-A" and "line-F" interrupts were designed just for those
- purposes... The FPU uses, as I recall, opcodes that trigger "line-F" (if no
- FPU is present).
-
- As I recall, the IEEE math libraries are already designed to use an
- FPU if available, otherwise emulate functions -- just in reverse, since you
- have to call the library entry routine rather than waiting for an interrupt.
-
- --
- > ============================================================ <
- > wulfraed@netcom.com | Wulfraed Dennis Lee Bieber KD6MOG <
- > D.Bieber@GEnie.com | FurryMUCK and FurToonia <
- > ============================================================ <
- > PGP key: Finger wulfraed@netcom.com <
- > Home Page: ftp://ftp.netcom.com/pub/wu/wulfraed/wulfraed.htm <
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