.th p_block IIa 4/21/86
.sh NAME
p_block \- parameter block
.sh SYNOPSIS
.nf

 p_block = RECORD
   location: virt_loc;      
   b_size  : cardinal;      
 END; 

.fi
.sh DESCRIPTION
P_block
contains the I/O buffer description.
.s3
.lp 18 12
location
is the virtual location of the I/O buffer.
.s3
.lp 18 12
b_size
is the byte size of the I/O buffer.
.i0
.sh "SEE ALSO"
virt_loc (IIa),
K_device_function (II),
K_read_block (II),
K_write_block (II)
