Motorola MVME172 manual Vector Base Register, Vbr

Models: MVME172

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VMEchip2

Interrupt Level Register 4 (bits 0-7)

ADR/SIZ

 

 

$FFF40084

(8 bits [6 used] of 32)

 

BIT

7

6

5

 

4

3

2

 

1

 

0

 

 

 

 

 

 

 

 

 

 

 

 

NAME

 

 

VIRQ2

 

 

 

VIRQ1 LEVEL

 

 

 

 

 

 

 

 

 

 

 

OPER

 

 

R/W

 

 

 

 

R/W

 

 

 

 

 

 

 

 

 

 

 

RESET

 

 

0 PSL

 

 

 

 

0 PSL

 

 

 

 

 

 

 

 

 

 

 

 

 

This register is used to define the level of the VMEbus IRQ1 interrupt and the VMEbus IRQ2 interrupt. The VMEbus level 1 (IRQ1) interrupt and the VMEbus level 2 (IRQ2) interrupt may be mapped to any local bus interrupt level.

VIRQ1 LEVEL These bits define the level of the VMEbus IRQ1 interrupt. VIRQ2 LEVEL These bits define the level of the VMEbus IRQ2 interrupt.

Vector Base Register

ADR/SIZ

 

 

 

$FFF40088 (8 bits of 32)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BIT

31

30

 

29

28

27

26

 

25

24

 

 

 

 

 

 

 

 

 

 

 

NAME

 

VBR 0

 

 

 

 

VBR 1

 

 

 

 

 

 

 

 

 

 

OPER

 

R/W

 

 

 

 

R/W

 

 

 

 

 

 

 

 

 

 

RESET

 

0 PSL

 

 

 

 

0 PSL

 

 

 

 

 

 

 

 

 

 

 

 

This register is used to define the interrupt base vectors.

VBR 1

These bits define the interrupt base vector 1.

VBR 0

These bits define the interrupt base vector 0.

Note

Refer to Table 2-3,Local Bus Interrupter Summary, for

 

further information.

 

A suggested setting for the Vector Base Register for the

 

VMEchip2 is: VBR0 = 6, VBR1 = 7 (i.e., setting the Vector

 

Base Register at address $FFF40088 to $67xxxxxx). This

 

produces a Vector Base0 of $60 corresponding to the “X” in

 

Table 2-3, and a Vector Base1 of $70 corresponding to the

 

“Y” in Table 2-3.

2-96

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Page 174
Image 174
Motorola MVME172 manual Vector Base Register, Vbr