Tandy 1000 Basic Reference Manual

Chapter 10 I BASIC Keywords
By listing the counter variable, you can use the NEXT state-
ment to close nested loops. (Be sure not to type the variables out
of order.) For example, delete Line 920 and change 930 to:
930 NEXT J, I
If you omit the variables in nested loops, BASIC matches the
most recent FOR statement.
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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