Tandy 1000 Basic Reference Manual

Chapter 10 I BASIC Keywords
WAIT
Statement
WAIT port, numberl [,number21
Suspends program execution until a machine input port develops
a specified bit pattern. (A port is an inputloutput location.)
Number1 and Number2 are integers in the range 0 to 255.
BASIC reads the data at the specified port and XORs it with
number2, if given. If you omit number2, BASIC XORs the data
with zero. BASIC then ANDs the result with
numberl. If the re-
sult
is zero, BASIC starts again with reading the data at the
port again. If the result
is nonzero, BASIC continues with the
next statement.
It is possible to enter an infinite loop with the WAIT statement.
In this case, you must
restart the machine manually. To avoid
this, WAIT must have the specified value at port number during
some point in program execution.
Example
100 WAIT 32,2
340

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