DOS ain't dead

allocation no higher than the PSP (Developers)

posted by Ninho , 01.06.2011, 18:56

> Only if you use one of the "First fit" allocation strategies.

Not necessarily. If I replace the int 21 function 48h by mine, I needn't observe DOS's "strategy" - assuming it has one ;=) But I will set the UMB "link" state, yes.

Seriously I'd like to hear of others' opinion on the polite controversy over what TSRs are or aren't supposed to do. Specifically, I maintain a TSR which intends to sanely 1. call DOS functions and, or, 2. access DOS's internal state directly (whether to modify it or just for monitoring), MUST refrain from doing so if DOS has been entered - except well known cases of a few DOS 1 console functions IF INDOS flag=1. I've been stunned by CM's assumptions of TSR's allowed to basically mess with DOS in whatever way they fancied. Other developers speak up please, your silence has been deafening :=)

Aside from this diversion, I have devised a new scheme based on int 15/ 4F only, for enabling/disabling/testing the state of the keyboard driver. Hope to implement this the sooner.

All this is entertaining, how much I regret I can't get a little more time to try and finalise all the interesting ideas...

---
Ninho

Complete thread:

• keyb: new! memory scheme, easy TEST - Ninho, 22.05.2011, 19:10 (Developers)
  • boring - ecm, 22.05.2011, 23:58
    • boring - Ninho, 23.05.2011, 01:20
      • not that boring after all (nt) - ecm, 23.05.2011, 13:27
  • review - ecm, 23.05.2011, 13:18
    • review - Ninho, 23.05.2011, 23:10
      • review - ecm, 24.05.2011, 00:45
        • review - Ninho, 24.05.2011, 12:50
          • review - ecm, 24.05.2011, 15:20
            • of TSR powers & limits - Ninho, 25.05.2011, 11:24
              • Swap! - ecm, 25.05.2011, 14:13
                • of TSR powers & limits - Ninho, 25.05.2011, 15:14
    • fix - Ninho, 29.05.2011, 14:36
      • opinion - ecm, 29.05.2011, 14:49
        • opinion - Ninho, 29.05.2011, 16:36
          • evaluation - ecm, 29.05.2011, 17:26
            • evaluation - Ninho, 29.05.2011, 21:00
              • hardly a 100% solution - ecm, 29.05.2011, 22:17
                • hardly a 100% solution - Ninho, 30.05.2011, 19:26
                  • hardly a 100% solution - ecm, 30.05.2011, 19:33
                    • hardly a 100% solution - Ninho, 30.05.2011, 21:14
                      • hardly a 100% solution - ecm, 30.05.2011, 21:20
                        • hardly a 100% solution - Ninho, 30.05.2011, 23:50
                          • allocation no higher than the PSP - ecm, 30.05.2011, 23:56
                            • allocation no higher than the PSP - Ninho, 01.06.2011, 18:56
                              • allocation no higher than the PSP - ecm, 01.06.2011, 19:10
          • opinion - Ninho, 30.05.2011, 19:04
            • sti - ecm, 30.05.2011, 19:26