Table of Contents
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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
D11
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
- Quick Links:
- Section 1. System Board
- 64/256K System Board
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