Date: Mon, 30 Mar 92 12:50:52 PST
From: Eric Raymond <raymond AT ptolemy DOT arc DOT nasa DOT gov>
To: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: Interrupts, Alternate Video Modes
Status: O


Two Questions:

1)  How does djgpp support user defined interrupt functions?  Are
    there separate real/protected mode handlers?  Are there surrogates
    which handle interrupts that occur in the other mode?  Can you
    chain from real to protected or protected to real?


2)  How easy would it be for me to add support for another video
    standard.  This would be a double scan version of CGA (640*400).
    Also, is there a richer set of graphics routines that people are
    using? Something along the lines of BGI, FlashGraphics, or
    Metagraphics.