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VDP1 User's Manual / Chapter 6 Command Table

■ 6.2 CMD LINK (LINK specified)

CMDLINK specifies the address of the command table to be processed next when assign or call is specified in jump format. Specify the command table start address + 02H in 16 bits.

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 Ten
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 1
 0
CMDLINK
+ 02H
LINK designation / 8H 0 0

CMDLINK: Command table start address + 02H
When the command table being processed is finished, if the jump format is assign, it moves to the command table with the CMDLINK address, and if it is a call, the command table with the CMDLINK address is called as a subroutine, and the command table to be processed next is processed. Migrate.
For the address, specify the value obtained by dividing the VRAM address by 8H by 16 bits. Since the command table is stored in the boundary of 20H (32) Byte units, the lower 2 bits of CMDLINK is 00H.
This CMDLINK is ignored when the jump format (JP) is specified for the next table or for returning to the main routine.


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HARDWARE ManualVDP1 User's Manual
Copyright SEGA ENTERPRISES, LTD., 1997