Yamaha V9938 Programmer's Manual page 91

Step 3: Select destination memory
MSB
R#45
Step 4: Define logical operation and execute the command
MSB
R#46
Step 5: Check for command completion
CPU should check CE bit of status register S#2 to identify if VDP has completed
execution of the command. When command is being executed, CE bit is set to 1; when
command is complete, CE bit will be reset to 0.
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7 6 5
0 - MXD
7 6 5
0 1 1
4 3 2
- - -
4 3 2
0 LO3 LO2 LO1
Logical operation
Page 91 of 108
1 0 LSB
- -
0: VRAM Destination
location select
1: ExpRAM
1 0 LSB
LO0 PSET cmd
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