🚀 go-pugleaf

Ralf.Brown@B.GP.CS.CMU.EDU writes:
>The TSR I was thinking of swaps two pairs of keys on the keyboard in 53
>bytes of resident code.  You need to keep the first 64 bytes of the PSP
>(though you can clobber the first ten), so the TSR actually takes 128
>bytes when loaded low, 64 when loaded into a UMB.

If I had known that...  Hmm... why can you chuck the PSP when loaded
into a UMB but not when loaded low?

>I've also seen a *removable* TSR that takes only 64 bytes at the top of
>conventional memory.

I didn't put the functionality into tsr64.c, but it could remove the TSR
by seeing were the hooked interrupted points to, do a memcmp to check
if what's there is our ISR, unhooking it, and then freeing it's memory.

							Ross Ridge

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