Memory Maps

Table 1-4. Local I/O Devices Memory Map (Continued)

Address Range

Devices Accessed

Port Size

Size

Notes

 

 

 

 

 

$FFF43100 - $FFF431FF

Petra/MCECC #2

D8

256B

1

 

 

 

 

 

$FFF43200 - $FFF43FFF

Petra/MCECCs (repeated)

--

3.5KB

1,7

 

 

 

 

 

$FFF44000 - $FFF44FFF

Reserved

--

4KB

5

 

 

 

 

 

$FFF45000 - $FFF451FF

CD2401 (Serial Comm. Cont.)

D16-D8

512B

1,9

 

 

 

 

 

$FFF45200 - $FFF45DFF

Reserved

--

3KB

7,9

 

 

 

 

 

$FFF45E00 - $FFF45FFF

Reserved

--

512B

1,9

 

 

 

 

 

$FFF46000 - $FFF46FFF

82596CA (LAN)

D32

4KB

1,8

 

 

 

 

 

$FFF47000 - $FFF47FFF

53C710 (SCSI)

D32/D8

4KB

1

 

 

 

 

 

$FFF48000 - $FFF4FFFF

Reserved

--

32KB

5

 

 

 

 

 

$FFF50000 - $FFF6FFFF

Reserved

--

128KB

5

 

 

 

 

 

$FFF70000 - $FFF76FFF

Reserved

--

28KB

6

 

 

 

 

 

$FFF77000 - $FFF77FFF

Reserved

--

4KB

2

 

 

 

 

 

$FFF78000 - $FFF7EFFF

Reserved

--

28KB

6

 

 

 

 

 

$FFF7F000 - $FFF7FFFF

Reserved

--

4KB

2

 

 

 

 

 

$FFF80000 - $FFF9FFFF

Reserved

--

128KB

6

 

 

 

 

 

$FFFA0000 - $FFFBFFFF

Reserved

--

128KB

5

 

 

 

 

 

$FFFC0000 - $FFFCFFFF

M48T58 (BBRAM, TOD

D32-D8

64KB

1

 

Clock)

 

 

 

 

 

 

 

 

$FFFD0000 - $FFFDFFFF

Reserved

--

64KB

5

 

 

 

 

 

$FFFE0000 - $FFFEFFFF

Reserved

--

64KB

2

 

 

 

 

 

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