IBM 5150 Hardware Reference Manual

BASIC Workspace Variables
If you do DEF SEG (Default workspace segment)
OFFSET
LENGTH
Line number of current line being executed
X '2E'
2
Line number of last error X '347'
2
Offset into segment of start of program text X '30'
2
Offset into of start of variables X '358'
2
(end of program text 1-1)
Keyboard buffer contents
X'SA'
1
if O-no characters in buffer
if l-characters in buffer
if you POKE & H6A, 0 you
flush any characters in buffer
Example:
100 Print
PEEK (&H2E) + 256*PEEK (&H2F)
)
L
H
100 X'S4'
X '00'
I
I
I
3-23

IBM 5150 Specifications

General

Processor	Intel 8088
Clock Speed	4.77 MHz
RAM	16 KB - 256 KB
Manufacturer	IBM
Model	5150
Release Year	1981
Storage	5.25-inch floppy drives
Graphics	MDA or CGA
Operating System	IBM PC DOS
Ports	Cassette, keyboard
Expansion Slots	5