9 ms·
Now I'm really pretty curious what was in those "internal" registers! I assume it's not just the descriptor cache? EDIT: Based on the vcfed thread mentioned ea
by anyfoo 4y ago
Now I'm really pretty curious what was in those "internal" registers! I assume it's not just the descriptor cache?
EDIT: Based on the vcfed thread mentioned earlier[1], seems like it just might be temporary registers that microcode uses, so potentially not have any effect across instructions.
[1] https://forum.vcfed.org/index.php?threads/i-found-the-saveall-opcode.71519/ https://forum.vcfed.org/index.php?threads/i-found-the-saveal...
- rep_lodsb 4y agojust posted another article that goes into that :) https://rep-lodsb.mataroa.blog/blog/the-286s-internal-registers/ https://rep-lodsb.mataroa.blog/blog/the-286s-internal-regist...
- anyfoo 4y agoWow, really comprehensive. Answers a lot more than I would have hoped. Thanks for all that work!
- yuhong 4y ago"This must be passed to the FPU interface, which acts somewhat like a DMA controller and contains its own base and limit registers." What may be fun is the coprocessor segment overrun exception.