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- This is the latest version of my VIDC module for the NEC 3D. I have
- extended it to use the Atomwide VIDC enhancer and it includes some of
- the large modes this can provide. The modes supported are as follows:-
-
- Mode 76 2 colours 120x48 chars 1920x384 pixels
- Mode 77 4 colours 120x48 chars 1920x384 pixels
- Mode 78 16 colours 120x48 chars 1920x384 pixels
- Mode 79 256 colours 120x48 chars 1920x384 pixels
- Mode 96 2 colours 100x75 chars 800x600 pixels
- Mode 97 4 colours 100x75 chars 800x600 pixels
- Mode 98 8 colours 100x75 chars 800x600 pixels
- Mode 100 2 colours 144x56 chars 1152x448 pixels
- Mode 101 4 colours 144x56 chars 1152x448 pixels
- Mode 102 8 colours 144x56 chars 1152x448 pixels
-
- It also adds two new commands (ExtendedModes & NormalModes) These
- switch between the standard modes for modes 0 to 17 or the ones
- provided by the module. This is because when the NEC 3D monitor is
- first switched on it will not synchronise to the lower frequency modes.
- So the extended modes in the module use the higher frequency clock.
- Once the monitor has been on for about 10 minutes it will synchronise
- to the standard modes so the switch has been provided so the lower
- speed clock can be used. This means that programs (mainly games) that
- make use of the video rate for sound and timers, will still work
- properly.
-
- I have also included a replacement mode module for the new
- (version 1.7) PC Emulator. The one supplied with the emulator does not
- work properly in single user mode with the NEC 3D, but a slight
- modification of the VIDC registers makes it all work perfectly.
-
- I thought I would take this opportunity to tell you something of
- the NEC 3D monitor. There have been a lot of reviews of monitors over
- the last few months but nobody ever seems to mention the NEC 3D. I
- feel this is a sad omission. I have been using mine for some 2 years
- now. To quote the user's manual it is a microprocessor based, digital
- controlled multiple frequency colour monitor. It automatically adjusts
- to scanning frequencies between 15.5 KHz and 38 KHz and frame rates
- between 50 Hz and 90 Hz. This means it can support all the modes the
- Archie can throw at it. It has a 0.28 mm dot pitch which gives a sharp
- picture even in the high resolution modes like 102. All the controls
- for the monitor are accessible from the front. The mains switch is to
- the right then there is a brightness and contrast control to the left
- of this. Further to the left is a pull down cover that reveals a set
- of push buttons that adjust the horizontal and vertical size and
- position and a switch that turns the user mode on. The control
- processor has some non-volatile memory where it stores position and
- size information for different scan rates. This means that once you
- have set these up for a particular mode they are automatically saved
- and will be recalled next time that €mode is selected. There is no
- messing about adjusting things every time you change mode. The user
- mode provides a second set of stored locations which can be useful if
- two modes are at the same scan rate but require different positions. I
- use this for the high resolution modes 100-102 which seem to clash with
- mode 20.
-
- The picture quality is excellent. Personally I prefer it to all
- the other similar monitors I have seen. The whites are truly white and
- the colour rendition excellent. The picture is perf ectly stable with
- no sign of flicker.
-
- To take full advantage of the monitor a VIDC Enhancer is required
- and some of the standard modes require modification. Modes 18-21 cannot
- be brought into the centre of the screen and modes 0-17 will not lock
- properly until the monitor has been on for about 10 minutes. This can
- be remedied with the addition of a VIDC module to provide modified
- modes (as supplied with this letter). This seems to be a standard
- requirement of most multisync monitors.
-
- I'm not sure of the current cost of the monitor but when I bought
- mine 2 years ago it was about £450 and when a friend bought one a year
- later it was about £400 so it compares favourably with the equivalent
- Taxan and Eizo monitors. I can thoroughly recommend this monitor.
-
-
- Yours sincerely
-
-
- Andrew D Ling
-