#: 18494 S12/OS9/68000 (OSK)
    03-Aug-93  00:53:40
Sb: #18492-#Phillips CD-I
Fm: Ken Jordan 72420,1302
To: Graham Trott 100115,1075 (X)

Graham,

Well from my point of view as a CD-I games programmer I feel that the CD-I
hardware is handicapped by the fact that OS-9 signals can't nest like real
interrupts.  This means that you can't guarantee any kind of response time
(i.e, to _really_ know when you are in vblank).  These problems are not at all
fatal, just annoying.  The designers of CD-I were thinking slide show more than
real-time video (way back in the '80s).

I don't mind OS-9 from a general operating system standpoint.  And the CD-I
system routines could have been designed to overcome these signal limitations
(like vectoring hardware interrupts or something).

IMHO is it stretching the definition of real time to call CD-RTOS a real time
operating system.

(>ducking<).

CMA: OS-9 is GREAT!  Much better then MS-DOS.  I wish microsoft would adopt
it... :-)

Ken Jordan


  

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