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0 pointsanthk2mo ago0 comments

No, you are wrong. DOS COM files if 16 bit can't be run on 64 bit CPU's but 32 bit DOS binaries can be run under 32 bit GNU/Linux installs with DosEMU straight by just emulating the BIOS part, the rest is native.

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rep_lodsb2mo ago

It has nothing to do with being unable to run 16-bit code, that's a myth.

https://man7.org/linux/man-pages/man2/modify_ldt.2.html

Set seg_32bit=0 and you can create 16-bit code and data segments. Still works on 64 bit. What's missing is V86 mode, which emulates the real mode segmentation model.

anthkOP2mo ago

That can be trapped for sure.

M95D2mo ago

You actually confirmed what I said. :)

anthkOP2mo ago

50/50, because once you boot a 32 bit os you can run 16 bit binaries :)

I'm pretty sure that if I make a dual-kernel 9front (9pc and 9pc64 available at boot) in a 64 bit machine and I compile emu2 for it, DOS COM binaries might be trapped enough to run simple text mode tools under the 386 port.

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rep_lodsb2mo ago

It has nothing to do with being unable to run 16-bit code, that's a myth.

https://man7.org/linux/man-pages/man2/modify_ldt.2.html

Set seg_32bit=0 and you can create 16-bit code and data segments. Still works on 64 bit. What's missing is V86 mode, which emulates the real mode segmentation model.

anthkOP2mo ago

That can be trapped for sure.

M95D2mo ago

You actually confirmed what I said. :)

anthkOP2mo ago

50/50, because once you boot a 32 bit os you can run 16 bit binaries :)

j / k navigate · click thread line to collapse