How do you access more memory (above the 1 MB) in DOS if the 640 KB of conventional memory are not enough?

I have read a lot about this, but I couldn't figure out how to do this in actual code. Is there an API for this (like in HIMEM.SYS), or can I code it myself? Any answer is fine, whether it uses the XMS or the EMS standard or manually written code. From what I read, though, EMS requires specialized hardware, which is not very convenient.

If you can, please also explain if there are any differences between doing it on an Intel 80286 or an Intel 80386. Does it necessarily require switching to protected mode?

How do you access more memory (above the 1MB) in DOS if the 640KB of conventional memory are not enough?

I have read a lot about this, but I couldn't figure out how to do this in actual code. Is there an API for this (like HIMEM.SYS), or can I code it myself? Any answer is fine, whether it uses the XMS or the EMS standard or manually written code. From what I read, though, EMS requires specialized hardware, which is not very convenient.

If you can, please also explain if there are any differences between doing it on an Intel 80286 or an Intel 80386. Does it necessarily require switching to protected mode?

How do you access more memory (above the 1 MB) in DOS if the 640 KB of conventional memory are not enough?

I have read a lot about this, but I couldn't figure out how to do this in actual code. Is there an API for this (like in HIMEM.SYS), or can I code it myself? Any answer is fine, whether it uses the XMS or the EMS standard or manually written code. From what I read, though, EMS requires specialized hardware, which is not very convenient.

If you can, please also explain if there are any differences between doing it on a Intel 80286 or a Intel 80386. Does it necessarily require switching to protected mode?

How do you access more memory (above the 1 MB) in DOS if the 640 KB of conventional memory are not enough?

I have read a lot about this, but I couldn't figure out how to do this in actual code. Is there an API for this (like in HIMEM.SYS), or can I code it myself? Any answer is fine, whether it uses the XMS or the EMS standard or manually written code. From what I read, though, EMS requires specialized hardware, which is not very convenient.

If you can, please also explain if there are any differences between doing it on an Intel 80286 or an Intel 80386. Does it necessarily require switching to protected mode?