Memory Map of the MC2 Chip Registers

MC2 chip Base Address = $FFF42000.

Table 3-2. MC2 Chip Register Map

Offset

D31-D24

D23-D16

D15-D8

D7-D0

 

 

 

 

 

$00

MC2 chip ID

MC2 chip

General Control

Interrupt Vector

 

 

Revision

 

Base Register

 

 

 

 

 

$04

Tick Timer 1 Compare Register

 

 

 

 

 

 

$08

Tick Timer 1 Counter Register

 

 

 

 

 

 

$0C

Tick Timer 2 Compare Register

 

 

 

 

 

 

$10

Tick Timer 2 Counter Register

 

 

 

 

 

 

 

$14

LSB Prescaler

Prescaler Clock

Tick Timer 2

Tick Timer 1

 

Count Register

Adjust

Control

Control

 

 

 

 

 

$18

Tick Timer 4

Tick Timer 3

Tick Timer 2

Tick Timer 1

 

Interrupt Control

Interrupt Control

Interrupt Control

Interrupt Control

 

 

 

 

 

$1C

DRAM Parity

SCC Interrupt

Tick Timer 4

Tick Timer 3

 

Error Interrupt

Control

Control

Control

 

Control

 

 

 

 

 

 

 

 

$20

DRAM Space Base Address Register

SRAM Space Base Address Register

 

 

 

 

 

$24

DRAM Space Size

DRAM/SRAM

SRAM Space Size

Reserved

 

 

Options

 

 

 

 

 

 

 

$28

LANC Error

Reserved

LANC Interrupt

LANC Bus Error

 

Status

 

Control

Interrupt Control

 

 

 

 

 

$2C

SCSI Error Status

General Purpose

MVME172

SCSI Interrupt

 

 

Inputs

Version

Control

 

 

 

 

 

$30

Tick Timer 3 Compare Register

 

 

 

 

 

 

$34

Tick Timer 3 Counter Register

 

 

 

 

 

 

$38

Tick Timer 4 Compare Register

 

 

 

 

 

 

$3C

Tick Timer 4 Counter Register

 

 

 

 

 

 

 

3

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Motorola MVME172 manual Memory Map of the MC2 Chip Registers