using the bootstrap loader

WRITING A CUSTOM FIRST-STAGE DRIVER
/************************************************************
* This example illustrates how a host CPU board *
* broadcasts a control message to all system boards *
* having a port$id of IF4H. During message *
* broadcasting, the host$id portion of socket is *
* ignored. *
* *
The control message sent is located in p$control$msg *
* (Peripheral Command Message. *
************************************************************/
SAMPLE_BS$BROADCAST: DO;
DECLARE socket DWORD;
DECLARE socket$o structure
(host$id WORD,
port$id WORD) AT (@socket);
DECLARE p$control$msg(20) BYTE;
DECLARE exception WORD;
DECLARE slot LITERALLY 'IH' ;
DECLARE port LITERALLY 'IF4H';
CODE: DO;
socket$o.host$id
socket$o.port$id
slot;
port;
CALL BS$BROADCAST
(socket,@p$control$msg(O),@exception);
Bootstrap Loader 5-25