TAL Reference Manual

Privileged Procedures

TAL Reference Manual—526371-001

15-3

System Global Pointer Declaration

The system global pointer declaration associates an identifier with a memory location

at which you store the address of a variable located in the system global data area.

type

is any data type except UNSIGNED and specifies the data type of the value to

which the pointer points.

.SG

is the system global indirection symbol and denotes 16-bit addressing in the

system global data area.

identifier

is the identifier of the pointer.

preset-address

is the address of a variable in the system global data area. The address is

determined by you or the system during system generation.

Usage Consideration

The compiler allocates one word of primary storage for the pointer in the current user

data segment. The primary storage can be global, local, or sublocal, depending on the

level at which you declare the pointer.

Example of System Global Pointer Declaration

The following example declares an INT system global pointer named NEWNAME:

INT .SG newname;

VST1501.vsd

.SGtype

identifier

preset-

address

;