Gilderflukeco old Smart Brick Manual Manuel d'utilisateur télécharger pdf (Page 141)

- Panasonic LaserDisk Commands -

Panasonic LaserDisk players are supported on the Rack Smart Brick Brain ONLY. The only player that

this code has been tested on as of this writing is the AG-LD-30. Other players from Panasonic are known

to have mutually incompatible command formats, and so are not recommended. A full description of

the commands can be found in the technical publications available from Panasonic or your Panasonic

dealer. You should confirm the the usage of these commands for the specific player you are using.

The Panasonic LaserDisk player only supports disks recorded in the CAV format when used with the

Rack Smart Brick Brain. This allows up to 1/2 hour per side.

The Panasonic LaserDisk player must be configured for 9600 baud, 8 bit data, and 1 stop bit (4800

baud might also work in some applications). Other data rates can be used, but lower baud rates canÕt

get the data across fast enough for the Brick Brain while a show is running. Whatever the data rate used,

you must set the Brick Brain, LaserDisk player, and the terminal or computer you are using to configure

the system to the same speed. If parity is used, then you need to set the data word length to 7 bits, and

the parity to ÔoddÕ. You must also set the Brick Brain to recognize ÔoddÕ parity as well. Connections are

made as follows:

Panasonic LaserDisk

DB-15 SIGNAL SIGNAL FROM/TO BRICK BRAIN

2 DATA OUT - serial data in to Brick Brain (GREEN)

3 DATA IN - serial data out from Brick Brain (BLACK)

1, 11 or 15 GROUND signal ground (BLUE or WHITE)

The electrical output from PC¥MACs is at RS-422 voltage levels rather than the RS-232 that these

LaserDisk players really want to see. If this causes a problem, or it the wire runs between PC¥MACs and

the LaserDisk player are long, then you may want to add a RS-232 to RS-422 converter to the LaserDisk

player.

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 ÔACKÕ

(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, separated by a semi-

colon (Ò;Ó). 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 compli-

cated ÔsearchÕ command is handled transparently to you when you insert a LaserSearch (01) character

in the string being sent to the LaserDisk player (the Brick Brain must be told it is running a Panasonic play-

er 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 ÔOPLÕ (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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Gilderflukeco old Smart Brick Manual Manuel d'utilisateur Page 141

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