Yamaha V9938 Programmer's Manual page 88

MSB
R#45
Step 4: Execute the command
MSB
R#46
Step 5: Check for command termination or completion, and X-coordinate
Flag BD of the status register S#2 is set if coded color in register R#44 was found,
otherwise this bit is reset. Current value of the X-coordinate can be read from the status
registers S#8 and S#9.
MSB
S#2
MSB
S#8
S#9
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7 6 5
0 - MXD
7 6 5
0 1 1
7 6 5
- - -
7 6 5
BX7 BX6 BX5 BX4
1 1 1
4 3 2
- DIX
4 3 2 1
0 - -
4 3 2
BD - -
Set to 0 at the end or termination
of the command
4 3 2 1
BX3 BX2 BX1
1 1 1 1
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1 0 LSB
EQ -
0: NeqStop Stop condition
1: EqStop
0: Right X search
1: Left direction
0: VRAM Destination
location select
1: ExpRAM
0 LSB
- - SRCH cmd
1 0 LSB
- CE
Set to 1 if coded color is
found
0 LSB
BX0 Current X-
coordinate
BX8
© 2010-2015 Eugeny Brychkov