Apple Lisa - Page 8

Confidential
Lisa Hardware Reference Manual
EXCEPTION VECTOR ASSIGNMENT
Exception
Vector Address
Reset: Inital SSP
Reset: Initial PC
Bus Error
Address Error
Illegal Instruction
Zero Divide
CHK Instruction
TRAPV Instruction
Privilege Violation
Trace
Unimplemented Instruction 1010
Unimplemented Instruction 1111
Reserved, unaSSigned
Spurious Interrupt
Other Internal Interrupt
Keyboard Interrupt
Slot 2 Autovector
Slot 1 AUtovector
Slot 0 Autovector
RS232 Interrupt
Non-Maskable Interrupt
TRAP Instruction Vectors
Reserved, unassigned _
User Interrupt Vectors
$000000
$000004
$000008
$OOOOOC
$000010
$000014
$000018
$OOOOlC
$000020
$000024
$0.00028
$00002C
$000030
- $00005F
$000060
$000064
$000068
$00006C
$000070
$000074
$000078
$00007C
$000080
- $OOOOBF
$OOOOCO - $OOOOFF
$000100 - $0003FF
7-Jul-S1
These addresses are logical addresses. The operating system stores the
vectors in segment 0, context 0 in main memory.
Four sources can generate a Non-Maskable Interrupt! power fail, hard
or soft memory error, and keyboard reset. Any key on the keyboard
can be programmed to cause the ke.yboard reset.
The floppy disk controller, the hard disk interface, and the video
circuitry can generate level 1 interrupts.
Although the power on reset vector is a part of the exception vector
table given above, it is actually stored in ROM so that the vectors
.are available at power on.
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