4 ms·
My suspicion is that some application in the 286 - OS/2 days was found to expect an 'invalid opcode' fault from CR1, so that's why it had to stay reserved.
by caf 10y ago
My suspicion is that some application in the 286 - OS/2 days was found to expect an 'invalid opcode' fault from CR1, so that's why it had to stay reserved.
- yuhong 10y agoThis reminds me of how INT 0Fh had to stay reserved because of a Pentium Pro errata.