Yamaha V9938 Programmer's Manual page 72

Step 2: Select destination memory and direction from base coordinate
MSB
R#45
Step 3: Execute the command
MSB
R#46
Step 4: Wait for command execution completion
While command is being executed by VDP, CE bit of status register S#2 will be set to
1. When command is complete, it will be reset to 0.
© 1985 ASCII CORP. / NIPPON GAKKI CO.
7 6 5
0 - MXD MSX
7 6 5
1 1 0
4 3 2
DIY DIX
4 3 2
1 - -
Page 72 of 108
1 0 LSB
- -
0: Right X transfer
direction
1: Left
0: Down Y transfer
direction
1: Up
0: VRAM Source
location select
1: ExpRAM
0: VRAM Destination
location select
1: ExpRAM
1 0 LSB
- - HMMM cmd
© 2010-2015 Eugeny Brychkov