Zenith Z-100 Series, Reference Manual, Page: 37 / 163

Page 2.20
System Operating Features
Table 2.10 lists the Basic Input/Output System (BIOS) entry point interrupts.
Table 2.10. BIOS Entry Point Interrupts
VECTOR FUNC T ION
10
11
12
13
14
15
16
17
18
19
IA Video I/O
Determine I/O configuration
Determine memory size
Disk I/O
Serial I/O (RS-232 I/O)
Not used
Keyboard I/O
Printer I/O
Not used
Boot loader (Boot operating system)
Set/read time-of-day
In addition, several special vectors are recognized, as defined by Table 2.11.
Table 2.11. Special Interrupt Vectors
VECTOR FUNC T ION
0
IB
IC
ID
IE
IF
Keyboard break (user entry)
Timer tick (user entry)
Video initialization
Diskette parameters
Graphics characters
For further details on the interadion of interrupt vectors in programming situations,
refer to the material contained in the chapter which relates to the parameter
of interest. Information on parameter passing may also be found in these chapters.