3

PCCchip2

Chip ID Register

The Chip ID Register is located at $FFF42000. It is an 8-bit read-only register that is hard-wired to a hexadecimal value of $20. Writes to this register are ignored; however, the PCCchip2 always terminates the cycles properly with TA*.

ADR/SIZ

 

 

 

$FFF42000 (8 bits)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BIT

31

30

29

 

28

27

 

26

25

24

 

 

 

 

 

 

 

 

 

 

 

NAME

CID7

CID6

CID5

 

CID4

CID3

 

CID2

CID1

CID0

 

 

 

 

 

 

 

 

 

 

 

OPER

R

R

R

 

R

R

 

R

R

R

 

 

 

 

 

 

 

 

 

 

 

RESET

0

0

1

 

0

0

 

0

0

0

 

 

 

 

 

 

 

 

 

 

 

Chip Revision Register

The Chip Revision Register is located at $FFF42001. It is an 8-bit read- only register that is hard-wired to reflect the revision level of the PCCchip2 ASIC. The current value of this register is $00. Writes to this register are ignored; however, the PCCchip2 always terminates the cycles properly with TA*.

ADR/SIZ

 

 

 

$FFF42001 (8 bits)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BIT

23

22

21

 

20

19

 

18

17

16

 

 

 

 

 

 

 

 

 

 

 

NAME

REV7

REV6

REV5

 

REV4

REV3

 

REV2

REV1

REV0

 

 

 

 

 

 

 

 

 

 

 

OPER

R

R

R

 

R

R

 

R

R

R

 

 

 

 

 

 

 

 

 

 

 

RESET

0

0

0

 

0

0

 

0

0

0

 

 

 

 

 

 

 

 

 

 

 

3-14

Computer Group Literature Center Web Site

Page 212
Image 212
Motorola MVME1X7P manual Chip ID Register, Chip Revision Register