The Cyrix coma bug is a design flaw in Cyrix 6x86 (introduced in 1996), 6x86L, and early 6x86MX processors that allows a non-privileged program to hang...
4 KB (430 words) - 02:51, 21 October 2024
sometimes used to describe similar hardware design flaws such as the Cyrix coma bug. No permanent hardware damage results from executing the F00F instruction...
12 KB (1,583 words) - 14:36, 13 August 2024
in an infinite loop to create a denial of service attack, as in the Cyrix coma bug. The C standard and SUSv3 provide sig_atomic_t for simple atomic reads...
24 KB (3,291 words) - 03:39, 9 October 2024
renders portions of ordinary instructions uninterruptible too. The Cyrix coma bug would hang a single-core system using an infinite loop in which an uninterruptible...
21 KB (2,571 words) - 01:33, 10 July 2024
Halt and Catch Fire (computing) (category Hardware bugs)
1990s, has an undocumented HCF instruction with the opcode 7B. Cyrix coma bug Pentium F00F bug Killer poke lp0 on fire Write-only memory (joke) NOP (code)...
26 KB (2,674 words) - 02:40, 9 October 2024
Infinite loop (category Software bugs)
or the processor may be in an uninterruptible state, such as in the Cyrix coma bug (caused by overlapping uninterruptible instructions in an instruction...
22 KB (2,624 words) - 22:26, 18 October 2024
of the Intel Pentium. On the Cyrix 5x86 and 6x86 CPUs, CPUID is not enabled by default and must be enabled through a Cyrix configuration register. On NexGen...
253 KB (14,070 words) - 22:08, 5 November 2024