It will not suffice load a tsr in dosmode before chainloading NT, NT will overwrite the memory and the tsr will not work within NT.

You need extra Code for NT.

You can try to chainload NT with Grub4DOS so you can load NT Bootcode from MS-DOS.

i once did this on a T600 to enable Cache on Pentium 3 CPU..

feipoa wrote:

Scali wrote:

What does that have to do with TSRs? We are talking about 16-bit interrupt handlers installed by the TSR, which would likely get […]
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feipoa wrote:

Well, what about the L1 cache remaining enabled then? Or the CPU left in clock doubled mode?

What does that have to do with TSRs?
We are talking about 16-bit interrupt handlers installed by the TSR, which would likely get overwritten as the OS kernel initializes.
You are talking about chipset/CPU states.

Yes I am. I should have been more clear in the original post (since updated). My interests are two-fold: 1) I want to ensure that my CPU's register bits stay as I have set them using cyrix.exe, and b) the the the PS/2 mouse still works once PS2suppc.com has been loaded. Perhaps you could also include your thoughts concerning the CPU register status clearing or not?

it's certainly possible that the CPU option registers don't get wiped when NT loads, but you're not really going to know unless you test it

maxtherabbit wrote:

...but you're not really going to know unless you test it

Exactly. Trying to test it it out. Hoping someone more familiar with GRUB4DOS can offer some suggestions with this. New thread here: GRUB4DOS help needed to boot NT4 from DOS - SOLVED