MB86290A Datasheet, PDF (36/184 Pages) Fujitsu Component Limited. – Graphics Controller Hardware Specifications

3.5 Transfer of Local Display List
This is the mode in which the MB86290A internal bus is used to transfer the
display list stored in the graphics memory to the FIFO interface.
During transfer of the local display list, the host bus can be used to perform
read/write for the CPU.
How to transfer list: Store the display list in the local memory of the
MB86290A, set the transfer source local address (LSA) and the transfer
count (LCO), and then issue a request (LREQ). Whether or not the local
display list is currently being transferred is checked using the local transfer
status register (LSTA).
CPU
FIFO
SDRAM
CPU Bus
Memory IF
Internal Bus
SDRAM
Fig. 3.1 Transfer Path for Local Display List
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