Tandy 1000 Basic Reference Manual

Chapter 10 I BASIC Keywords
GOSUB Statement
GOSUB line
Branches to the subroutine beginning at the specified line num-
ber.
Every subroutine must end with a RETURN. You can call a sub-
routine as many times as you want. When BASIC encounters a
RETURN statement in the subroutine, it returns to the state-
ment that follows the GOSUB.
GOSUB is similar
to GOT0 in that it may be preceded by a test
st at ement
.
Example
GOSUB 1000
branches to the subroutine at Line 1000.
Sample Program
260 GOSUB 280
270 PRINT "BACK FROM SUBROUTINE": END
280 PRINT "EXECUTING THE SUBROUTINE"
290 RETURN
transfers control from Line 260 to the subroutine beginning at
Line 280. Line 290 instructs the computer to return to the
statement immediately following GOSUB.
172

Tandy 1000 Specifications

General

Processor	Intel 8088
Processor Speed	4.77 MHz
RAM	128 KB (expandable to 640 KB)
Operating System	MS-DOS 2.11
Manufacturer	Tandy Corporation
Release Year	1984
Storage	Single or double 5.25" floppy disk drive (360 KB), optional hard drive
Sound	Tandy 3-voice sound
Ports	Parallel, Serial
Graphics	CGA (Color Graphics Adapter)
Graphics Modes	320x200, 640x200