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4.2.10 Video Buffer Control Commands
Four new commands are available in the LD-V8000 to change the default operation of the
player's Video Buffer memory.
These commands are available on the LD-V8000 because the player has a full-frame
Video Buffer which can be used as two independent one-field buffers. These Video Buffer
Control commands cannot be used with other players because they manipulate the
unique video buffer hardware capabilities of the LD-V8000 videodisc player.
74) SMS (Set Video Memory Switches)
NEW
Function : SMS is used to set 3 of the player's video buffer control switches.
Argument
[Integer]
Explanation: This command sets three switches in player control Register G, as
specified by the argument (see following table). When a HALT is executed, these switches
return to the settings they had before Level II program execution.
There are 3 video buffer control switches which can be set:
• Program Buffer Control switch
This switch must be set to allow the program to control operation of the video
buffer. When this switch is ON, the other 3 Video Buffer Control commands can
be used to control the video buffer. If this switch is set to OFF, the video buffer is
controlled automatically by the player.
• Buffer Field Mode Select switch
This switch determines whether video buffer is used as two one-field buffers or as
one two-field (one frame) buffer. When the switch is ON, Buffer Field Mode is
selected and each buffer field can be controlled independently. Then, video field 0
or field 1 may be selected for video storage and video output. When Buffer Frame
Mode is selected, both field buffers are used and controlled together. Then, both
video fields 0 and 1 are automatically selected.
• Blue / Black Search-Squelch switch
This switch selects the video source to be used to generate the player's "search-
squelch" output. When the switch is ON, the player's internal Blue / Black screen
generator is selected. When the switch is OFF, the player's internal video buffer is
selected, so that the image held there continues being displayed.
Pioneer LD-V8000 Level II User's Manual
LD-V8000 Level II • Chapter Four
Video Buffer Control Commands — SMS
Hex Code
Mnemonic
84
TP 114 v. 1.1
SMS
•
8/92
RCU Buttons
PLAY, 8, 4
4-61
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