Yamaha V9938 Programmer's Manual page 79

Step 3: Clear the TR flag
Read the value from status register S#7. This step is required in order to clear the TR
flag. Please refer to flowchart in this section for the LMCM command.
Step 4: Execute the LMCM command
MSB
R#46
Step 5: Read dot color code and check fir command end
Use status register S#7 to get the color code of the dot. Format of color data
depends on the graphics mode.
MSB
S#7
Check CE bit of status register S#2 for command completion. CE set to 0 is the only
sign of the completed LMCM command.
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7 6 5
1 0 1
7 6 5
- - -
- - -
C7 C6 C5
4 3 2
0 - -
4 3 2
- C3 C2
- - -
C4 C3 C2
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1 0 LSB
- - LMCM cmd
1 0 LSB
C1 C0 G4, G6
C1 C0 G5
C1 C0 G7
© 2010-2015 Eugeny Brychkov