On 2002-12-02, Aitor Santamar�a Merino wrote: > The usual syntax of MS DISPLAY.SYS is > DEVICE[HIGH]=DISPLAY.SYS CON=(type,hwcp,n) > (with possible modifications on the last member).
Actually, "hwcp" also has an optional syntax variant as "(hwcp1,hwcp2,...)" in some issues of DISPLAY.SYS. Please see the DISPLAY.SYS API stuff I posted recently into the list, or refer to the KBD.LST file I sent you. This extension would be needed in areas where more than one hardware codepage is used, for example in the Middle East. Search RBIL or KBD.LST for Arabic or Hebrew MS-DOS for more details on this. > Being DISPLAY a CON driver, what would the first > word CON= be needed for? Does anyone know of other > > DISPLAY xxx=(... > > for xxx not being CON? Not for DISPLAY.SYS, but for PRINTER.SYS it can be PRN:, LPT1:, LPT2: LPT3:, (LPT4:). One could at least think of having multiple console drivers residing concurrently in a system, say CO80: and BW80: connected to different video systems and screens, and "CON" dynamically assigned to the default video system, just as PRN: is dynamically assigned to the default printer (usually LPT1:) and AUX: is assigned to the default auxilary device (usualy COM1:). At least in the case of a dual screen VGA+HGC system, such a driver is extremely easy to set up, see for example, Axel's DUALMON.SYS driver, which is part of the FreeDOS distribution. For multiple VGAs or other multi-monitor systems it's more complicated, but still possible - after all, the console device drivers is a rather abstract device. However, in this case, we'd need a parameter to tell DISPLAY.SYS to which console device driver it should attach to. Greetings, Matthias -- <mailto:[EMAIL PROTECTED]>; <mailto:[EMAIL PROTECTED]> http://www.uni-bonn.de/~uzs180/mpdokeng.html; http://mpaul.drdos.org "Programs are poems for computers."00000000000000000000000000000000000000 ---------- list options/archives/etc.: http://www.topica.com/lists/fd-dev unsubscribe: send blank email to: [EMAIL PROTECTED] ==^^=============================================================== This email was sent to: [email protected] EASY UNSUBSCRIBE click here: http://topica.com/u/?bz8Rv5.bbRv4l.YXJjaGl2 Or send an email to: [EMAIL PROTECTED] T O P I C A -- Register now to manage your mail! http://www.topica.com/partner/tag02/register ==^^===============================================================
