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we should never have tried to move beyond the 68K
...no not that (though sending a dead CPU to the press for review is rather shitty)
THAT'S the fuckup
The flaw exists in all AMD CPUs made since 2006, but aren't fixing anything newer than stuff from 2020
I don't trust Intel when they say that the oxidation was taken care of last year. I think they're lying as fuck lmao.
At least AMD caught it before the CPU came out, instead of letting them go out like Intel...?
we did fwiw
The 68LC040 is a low cost version of the Motorola 68040 microprocessor with no FPU. This makes it less expensive and it draws less power. Although the CPU now fits into a feature chart more like the Motorola 68030, it continues to include the 68040's caches and pipeline and is thus significantly faster than the 68030.
Some mask revisions of the 68LC040 contained a bug that prevents the chip from operating correctly when a software FPU emulator is used. According to Motorola's errata, any chip with a mask set 2E71M or later does not contain the bug. This new mask was introduced in mid-1995 and converted the 68LC040 chip to MC status.
The buggy revisions are typically found in 68LC040-based Apple Macintosh computers. Chips with mask set 2E23G (as used in the LC 475) have been confirmed to be faulty. The fault relates to pending writes being lost when the F-line exception is triggered. The 68040 cannot update its microcode in the manner of modern x86 chips. This means that the only way to use software that requires floating-point functionality is to replace the buggy 68LC040 with a later revision, or a full 68040.
