Gilderfluke&Co old Smart Brick Manual User Manual

Page 142

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Notice that after the LaserSearch command we have to then tell the LaserDisk to start playing, and

that we tell the Brick Brain to wait until it gets all of the echoed characters back from the LaserDisk player
so we know that the command has been accepted. After this we have a Ф00Х to tell the Brick Brain that it
has found the end of the string.

A typical end string for a Panasonic LaserDisk show is:

Lead-in Pause Lead-out (ACK) (Lead-in) (Pause) (Lead-out) end-o-string

Translated into HEX ASCII, this string becomes (this is what you would enter):

02h 4Fh 50h 41h 03h 86h 82h CFh D0h C1h 83h 00h

and it would be displayed on the String Setup Menu as:

02 4F 50 41 03 (06) (02) (4F) (50) (41) (03) 00

The format of this string is pretty much like that of the startup string, except that there is no need to

send the LaserSearch string as was done at the beginning of the show, and the Play command has
been replaced by a Pause command for the LaserDisk player. This freezes the image to whatever the last
image on the video disk was. Other commands are available for blanking out the video, ejecting the
disk, or a variety of other things. You can even build up a string which will tell the LaserDisk player to
search for another frame on the disk and freeze or start playing from that frame. If no command is given
to the LaserDisk player at the end of a LaserDisk show, then the player will continue playing along until
the end of the disk is reached or another command is received.

COMMAND

HEX CHARACTER SENT

POSITIVE RESPONSE

PLAY (OPL)

02h 4Fh 50h 4Ch 03h

86h 82h CFh D0h CCh 83h

Starts the player advancing at normal play speed.

PAUSE (OPA)

02h 4Fh 50h 41h 03h

86h 82h CFh D0h C1h 83h

Stops the playback without turning off the spindle motor. Displays a blank screen.

EJECT (OEJ)

02h 4Fh 45h 4Ah 03h

86h 82h CFh C5h CAh 83h

Stops the playback and spits out the LaserDisk. A blank screen is displayed.

STOP (OSP)

02h 4Fh 53h 50h 03h

86h 82h CFh D3h D0h 83h

Stops the playback, turns off the spindle motor and blanks the screen.

STILL (OTL)

02h 4Fh 54h 4Ch 03h

86h 82h CFh D4h CCh 83h

Stops the playback at the current frame.

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