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
I am impressed!
Suppose that I name DISPLAY as device CO80:, who assigns CON to CO80: ?
Aitor
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