Int
D
E
F
10
11
12
13
14
15
16
17
18
19
1A
1B
1C
1D
1E
1F
40
41
5A
5B
60-67
Address
34-37
38-3B
3C-3F
40-43
44-47
48-4B
4c-4F
50-53
54-57
58-5B
5C-5F
60-63
64-67
68-6B
6C-6F
70-73
74-77
78-7B
7C-7F
100-103
104-107
168-16B
16C-16F
180-19F
Name
Alternate
Printer
Diskette
Printer
Video
Equipment Check
Memory
Diskette
Communications
Cassette
Keyboard
Printer
Resident
BASIC
Bootstrap
Time
of
Day
Keyboard Break
Timer
Tick
Video
Initialization
Diskette
Parameters
Video
Graphics
Chars
Diskette
pointer
save
area
for
Fixed Disk
Fixed Disk
Parameters
Cluster
Used
by
Cluster
Program
Reserved
for
User
Programs
BIOS
Entry
D
11
DISK
INT
D
11
VIDEO
10
EQUIPMENT
MEMORY
SIZE
DETE~MINE
DISKETTE
10
RS232 10-
CASSETTE
10
KEYBOARD-IO
PRINTER
To
F600:0000
BOOTSTRAP
TIME
OF
DAY
DUMMY
RtTURN
DUMMY-RETURN
VIDEO-PARMS
DISK
BASE
o
FD
TBL
DOOO:XXXX
8088
Software
Interrupt
Listing
(Part
2
of
2)
Note:
For
BIOS index, see the BIOS Quick Reference
on
page
5-11
or
5-111.
Vectors with Special Meanings
Interrupt
Hex
IB
- Keyboard Break Address
This vector points to the code to be used when the Ctrl and Break
keys are pressed on the keyboard. The vector
is
invoked while
responding to the keyboard interrupt, and control should be
returned through an IRET instruction. The power-on routines
initialize this vector to an
IRET
instruction, so that nothing will
occur when the Ctrl and Break keys are pressed unless the
application program sets a different value.
Control may be retained by this routine, with the following
problems. The Break may have occurred during interrupt
System
BIOS
5-5
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