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HH
0/S
Function
Calls
The
following
is
a
list,
in
numeric
order,
of
all
function
calls
supported by
HH
0/S.
The
function
code
numbers
are given
in
hexadecimal. Function
calls
00
-
57
are
similar to
the
same
numbered
functions
in
MS-DOS.
Although
similar
in
nature,
these
functions are not necessarily
identical to
the
MS-DOS
functions.
Function
calls
numbered
higher than
57
are
not
equivalent
to
any
MS-DOS
functions
and
perform operations unique
to
the
HH
O/S
environment.
Page
01
-
Read
Keyboard
with
Echo
13
02
-
Display
Character
on Console
14
08
-
Read
Keyboard
without
Echo
15
09
-
Display
Character
String
16
0B
-
Check
Keyboard
Status
17
0C
-
Flush
Keyboard
Buffer
and
Read
Keyboard
18
25
-
Set
Interrupt
Vector
19
29
-
Parse
File
Name
20
2A
-
Get Date
21
2B
-
Set Date
22
2C
-
Get Time
23
2D
-
Set
Time
•
24
2E
-
Set
Disk
Verify After
Write Flag
25
35
-
Get
Interrupt
Vector
26
36
-
Get
Disk Free
Space
27
3C
-
Create
File
28
3D
-
Open
File
29
3E
-
Close
File
30
3F
-
Read From
File
31
40
-
Write
to File
32
41
-
Delete
File
33
42
-
Position
File
Pointer
34
43
-
Get/Set
File
Attributes
35
44
-
I/O
Control
for
Device
36
48
-
Allocate
Memory
Block
38
49
-
Release
Memory
Block
39
4B
-
Execute
Program
40
4C
-
Terminate
a
Process
42
4D
-
Get Process
Termination Status
43
4E
-
Find
First
Matching
File
44
4F
-
Find
Next Matching
File
46
54
-
Get
Disk
Verify
Flag
Setting
47
56
-
Rename
File
48
57
-
Get/Set
Date/Time
of
File
49
DO
-
Expand
File
50
D1
-
Reduce
File
52
D2
-
Return Absolute
File
Pointer
53
D3
-
Return
File
Size
55
D4
-
Return Free
Memory
Size
56
D5
-
Get
File
Mark
57
D6
-
Sound
Error
Tone
58
11
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