If you do
DEF
SEG (Default workspace segment):
Offset
Length
2E
2
Line
number
of
current
line
being
executed
347
2
Line
number
of
last
error
30
2
Offset
into
segment
of
start
of
program
text
358
2
Offset
into
segment
of
start
of
variables
6A
(end
of
program
text
1-1)
1
Keyboard
buffer
contents
O=No
characters
in
buffer
l=Characters
in
buffer
4E
1
Character
color
in
graphics
mode*
.....
Set
to
1,
2,
or
3
to
get-text
in
colors
1-3.
Do
not
set
to
O.
The
default
is
3.
Basic
Workspace
Variables
Example
100
PRINT
PEEK
(&H2E)
+
256
x
PEEK
(&H2F)
L
Hex
64
H
Hex
00
Starting
Address
00000
BIOS
interrupt
vectors
00080
Available
interrupt
vectors
00400
BIOS
data
area
00500
User
read/write
memory
c8000 Disk
Adapter
FOOOO
Read
only
memory
FEOOO
BIOS
program
area
BIOS
Memory
Map
BIOS
Programming Hints
The
BIOS code
is
invoked through software interrupts. The
programmer should not
"hard
code" BIOS addresses -into
application programs. The internal workings and absolute
addresses within BIOS are subject to change without notice.
If
an
error
is
reported by the disk or diskette code, you should
reset the drive adapter and retry the operation. A specified
number of retries should be required on diskette reads to ensure
the problem
is
not due to motor startup.
System BIOS 5-9
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