REA8 (Read A24 D8)

REA8 rep. count, Crate , VME add. incr., word count, VME add.

REA8 is a command used to read data from a VME slave in a trigger crate in address 24, Data 8 format. The data will be held in the crate transputer until a RECV is done.

rep. count :

Number of times that the command will be executed.

Crate :

Crate number in the range 0 to 15.

word count :

Number of words to be transferred (each time).

VME add. incr. :

VME address increment in multiples of 4 bytes.

VME add. :

VME starting address in Hexadecimal representation.

EXAMPLES:

1.

REA8 1 5 1 1 FF80000
will read one byte from VME address FF80000 in crate 5 in $1 \times D8$ 2TP mode. This means that the byte will be read in a single byte transfer.

2.

REA8 1 5 1 10 FF80000 .
This command will read the contents of VME addresses FF80000,
FF80004, FF80008, FF8000C, FF80010, FF80014, FF80018,
FF8001C, FF80020, FF80024 from crate 5 in $1 \times D8$ 2TP mode. Every fourth memory address will have a byte read from it.

3.

REA8 2000 5 1 1 FF80000
This will execute the command of the first example 2000 times.