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MVP MANUAL
11. MODE 99
The VS board contains preset data for autolocking 9 computer main models at shipment.
However, looking at the recent PC market is taken into consideration, it is not possible to incorporate preset data
in all models due to the diversification of manufacturers, models, and graphic mode, etc.
For this reason, the variable scan board has been forcibly locked to the mode called model data 99 for personal
computers without preset data in order to output the personal computer screen to the monitor.
Consequently, it can deal with many of the 24 kHz to 35 kHz personal computers (the upper limit for the dot clock
is 35 MHz).
However, this model No. 99 has several restrictions in order to deal with numerous personal computers.
• When the HFD command to change the sampling clock exceeds 35 MHz, the image may become blur.
Use 99 without moving HFD as much as possible.
• At the point the personal computer locked to model No. 99, dusts may appear at the top and bottom as shown
in the figure.
Dusts appearing at the top and bottom.
In such cases, use the VWM, VPS and VWD commands
to mask the dirt.
• The RGB board is the upper limit at which the dot clock 35 MHz ensures performance.
The following is a simple calculation method of the dot clock.
Dot clock (Hz)=Effective dot number x Horizontal frequency (Hz) x 1.35
• Use Mode 99 to output images temporarily. When used, it is recommended that the user preset area (No. 28
to 58) be changed and used after checking the frequency, etc. using FRQ command.
• The G on Sync model is not locked in the Mode 99.