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echo: 80xxx
to: PAUL WANKADIA
from: AUKE REITSMA
date: 1997-05-25 16:31:00
subject: opcodes

Hi Paul,
On 24 May 97, 10:16, you wrote to All
 PW> Does anyone know what happens when the CPU comes across an opcode
 PW> that it doesn't understand?  For example, what happens if a 386
 PW> tries to run a 486 or a Pentium opcode?
I think the CPU generates an "Invalid Opcode" interrupt. What happens then 
depends on the interrupt handler ...
I haven't looked deeply into this matter -- otherwise than noting that the 
system usually hangs ;-)
Greetings from
 _____
 /_|__|  Auke Reitsma, Delft, The Netherlands.
/  | \  --------------------------------------
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