Video Display Processor V9938
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The V9938 introduced in this manual is a Very Large-Scale Integrated
Circuit (VLSI) that was developed as a Video Display Processor (VDP)
for the MSX2.
The following functions are supported on the V9938.
- Full bit-mapped mode
- 80-column text display
- Access using X- and Y-coordinates. The load of the IIO
driver has been lightened. The X-Y coordinates are
independent of the screen mode.
- Fundamental commands implemented by hardware to decrease the
processing time of the IIO driver: AREA MOVE, LINE, SEARCH,
RASTER OPERATION, etc.
- Digitize and external synchronization
- Color palette (9 bits x 16 patterns)
- Linear RGB video output
- More sprites per horizonatal line
VRAM: 64 kB, 128 kB or 192 kB
Text modes: 80 x 24, 40 x 24 and 32 x 24
Resolution: 512 x 212 (4 or 16 colors from 512) , 256 x 212 (16 colors from 512) and 256 x 212 (256 colors)
Sprites: 32, 16 colors, max 8 per horizontal line
Hardware acceleration for copy, line, fill, etc. Logical operations available.
Interlacing to double vertical resolution
Vertical scroll register
9938 MSX-VideoTechnical Data Book.pdf
V9938-programmers-guide.pdf
V9938_MSX_Video_Technical_Data_Book.pdf
Circuit (VLSI) that was developed as a Video Display Processor (VDP)
for the MSX2.
The following functions are supported on the V9938.
- Full bit-mapped mode
- 80-column text display
- Access using X- and Y-coordinates. The load of the IIO
driver has been lightened. The X-Y coordinates are
independent of the screen mode.
- Fundamental commands implemented by hardware to decrease the
processing time of the IIO driver: AREA MOVE, LINE, SEARCH,
RASTER OPERATION, etc.
- Digitize and external synchronization
- Color palette (9 bits x 16 patterns)
- Linear RGB video output
- More sprites per horizonatal line
VRAM: 64 kB, 128 kB or 192 kB
Text modes: 80 x 24, 40 x 24 and 32 x 24
Resolution: 512 x 212 (4 or 16 colors from 512) , 256 x 212 (16 colors from 512) and 256 x 212 (256 colors)
Sprites: 32, 16 colors, max 8 per horizontal line
Hardware acceleration for copy, line, fill, etc. Logical operations available.
Interlacing to double vertical resolution
Vertical scroll register
9938 MSX-VideoTechnical Data Book.pdf V9938-programmers-guide.pdf V9938_MSX_Video_Technical_Data_Book.pdf