# The OS/K Team licenses this file to you under the MIT license.
# See the LICENSE file in the project root for more information.

CPU device function slots:

   slot    ax0 ax1 ax2 thr  name            desc
   0-15     -   -   -   -   (reserved)      (reserved)
    16      -   -   -   -   getmaxidx       rax = maximal index for a register frame
    17      -   -   -   -   getrfusage      rax = number of register frames active
    18      -   -   -   -   getcuridx       rax = index of the current register frame
    19      -   -   -   -   leastavail      rax = least index among inactive frames, -1 if none
    20      i   -   -   -   isactive        rax = is register frame #ax0 active?
    21      i   -   -   y   activate        activates register frame #ax0 (filling it with 0's)
    22      i   -   -   y   deactivate      deactivates register frame #ax0 (losing all its contents!)
    23      i   i   -   y   copyframe       copy contents of frame #ax1 into (active) frame #ax0
    24      i   i   -   y   moveframe       move frame #ax1 to (inactive) frame index #ax0
   25-31    -   -   -   -   (reserved)      (reserved)
    32      i   -   -   -   loadargs        load registers ax0-ax7 from frame #ax0
    33      i   r   -   -   loadreg         rax = register #ax1 from frame #ax0
   34-47    -   -   -   -   (reserved)      (reserved)
    48      i   r   i   y   storereg        store ax2 into register #ax1 from frame #ax0
   49-63    -   -   -   -   (reserved)      (reserved)
    64      i   i   -   y   idtadd          mark interrupt #ax0 as handled by register frame #ax1
    65      i   -   -   y   idtdel          mark interrupt #ax0 as unhandled
    66      i   -   -   -   idtquery        rax = interrupt #ax0 handled? rdx = index of handling frame
    67+     -   -   -   -   (reserved)      (reserved)

Arguments:
    i       immediate
    r       register index (0=inv, 1=rip, etc...)