Specifications

Chapter 2: Getting Started
2 – 11
Dx[,t]
The 'Dx' parameter indicates the DMA level, the optional ',t' extension indicates the
type of DMA to use, and is only needed in the off chance the default settings do not
work.
The 'x' DMA value is a number between 0 and 3 and indicates the DMA level of the
ECP port connected to the PC.
The ',t' value is optional and is a number between 0 and 2.
0 = No DMA, this will cause the ZVG to run slower. Use as a last
resort.
1 = Normal DMA mode. This is the default if not given.
2 = Single Mode DMA. This should be tried only if the default settings
don't work. Some older PC's may need this setting.
Ix
The 'Ix' parameter indicates the Interrupt level used by the ZVG. Set this to the
interrupt level given by your BIOS.
Mx
The 'Mx' command tells the ZVG what type of monitor you are using so that it can
do Color to B&W conversions, and flip the screen if necessary.
The 'x' value indicates the type of monitor is determined by adding the following
values together:
1 = Flip X axis
2 = Flip Y axis
4 = Use spot kill logic
8 = B&W Monitor connected to ZVG.
16 = Disable Overscanning.
For a B&W monitor that incorporates a spotkiller:
4 (spotkiller) + 8 (B&W) = 12 = M12
So M12 would be used to drive such a monitor.
For a similar color monitor:
4 (spotkiller) = M4
So M4 would be used to drive a color monitor that incorporates a spotkiller.