Gilderfluke&Co 'Smart' Brick Animation Control System User Manual

Page 184

In general, you send a command to the LaserDisk player as

a very long series of characters. This consists of the command
lead-in character (02h), the command to be sent, and finally the
command lead-out character (03h). When it has completed the
task the LaserDisk player will respond with an ‘ACK’ (06h), the
command lead-in character (02h), the command which was
sent, and finally the command lead-out character (03h).
Multiple commands can be combined on a single line, separat-
ed by a semicolon (“;”). The player will not always process the
commands and echo them in the order in which you sent them,
so you must test any multiple command you might want to use
thoroughly. We recommend you only use the default string #5
(the start string) and #7 (the end string) when working with
Panasonic LaserDisk Players.

The majority of commands which you might need to use are

all pretty simple ones. The one complicated ‘search’ command
is handled transparently to you when you insert a LaserSearch
(01) character in the string being sent to the LaserDisk player (the
Smart Brick Brain must be told it is running a Panasonic player in
the configuration screen). This string only performs a search for
the starting frame of the show on the LaserDisk player. For this
reason it is normally followed by a ‘OPL’ (play) command in the
same string.

A typical start string for a Panasonic LaserDisk show is:

LaserSearch Lead-in Play Lead-out (ACK) (Lead-in)

(Play) (Lead-out) end-o-string

Translated into HEX ASCII, this string becomes (this is what you

would enter):

01h 02h 4Fh 50h 4Ch 03h 86h 82h CFh D0h CCh 83h

00h

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

01 02 4F 50 4C 03 (06) (02) (4F) (50) (4C) (03) 00

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