AT&T 3B2/300 Technical Reference Manual page 459

FUNCTIONAL D E S C R I P T I O N - - - - - - - - - - - - - - - - - - - - - - - - - - -
PORTS CARD ADDRESS MAP
MEMORY 1/0 CHIP
ADDRESS ADDRESS
SELECT
DESCRIPTION
Ox 00000
-
LCS RAM (VECTOR TABLE)
Ox 80000
- MCS DPDRAM
Ox C0080
Ox 0480 PSI ID/VECTOR REGISTER
Ox C0082 Ox 0482 PSI PAGE REGISTER
Ox C0084 Ox 0484
PSI PCSR BITS 7-0
Ox C0088
Ox 0488 PSI PCSR BIT O (INTO)
Ox C0089 Ox 0489 PSI PCSR BIT 1 (INTI)
Ox COOSA Ox 048A PSI
PCSR BIT 2 (NOT USED)
Ox C008B Ox 048B PSI
PCSR BIT 3 (NOT USED)
Ox C008C Ox 048C
PSI PCSR BIT 4 (NOT USED)
Ox C008D Ox 0480 PSI PCSR BIT 5 (ARDY)
Ox C008E Ox 048E PSI PCSR BIT 6 (BAF)
Ox C008F Ox 048F PSI PCSR BIT 7 (PINTI[O])
Ox COlOO Ox 0500 PS2 CLEAR NM! REQUEST
Ox C0102 Ox 0502 PS2 CLEAR INTO REQUEST
Ox C0104 Ox 0504 PS2 CLEAR INTI REQUEST
Ox C0106 Ox 0506 PS2 CLEAR INT2 REQUEST
Ox C0180 Ox 0580
PS3 REQUEST RESET
Ox C0200
Ox 0600 PS4 DUARTO
Ox C0280 Ox 0680 PSS DUART 1
Ox C0300 Ox 0700 PS6 PARALLEL PORT
Ox C0400 Ox FFOO 80186 80186 CONTROL BLOCK
Ox C0420 Ox FF20 80186 INTERRUPT CONTROL
Ox C0450 Ox FFSO 80186 TIMER O CONTROL
Ox C0458 Ox FF58 80186 TIMER 1 CONTROL
Ox C0460 Ox FF60 80186 TIMER 2 CONTROL
Ox C04AO Ox FFAO 80186 CHIP SELECT CONTROL
Ox C04CO Ox FFCO 80186 OMA O CONTROL
Ox C04DO Ox FFDO 80186
OMA 1 CONTROL
Ox C04FE Ox FFFE 80186 RELOCATION REGISTER
Ox FCOOO -
ucs
ROM
NOTES:
1. Bit is cleared by 80186 Microprocessor access.
2. Bit is set to O by 80186 Microprocessor access
unless a "dummy" read is pending.
LEGEND:
ARDY Asynchronous Data Ready
BAF Bus Abort Feature
OMA Direct Memory Access
DPDRAM Dual Port Dynamic Random Access Memory
LCS Lower RAM Chip Select
MCS Memory Chip Select
NM! Nonmaskable Interrupt
PCSR Peripheral Control and Status Register
PS Peripheral Select
UCS Upper RAM Chip Select
Figure 3-64: CM195B/CM195BA PORTS Card Address Map
3-206 TECHNICAL REFERENCE MANUAL
ACCESS
READ/WRITE
READ/WRITE
WRITE
WRITE
READ
(NOTE 1)
(NOTE 1)
-
-
-
(NOTE 2)
(NOTE 2)
(NOTE 1)
-
-
-
-
-
READ/WRITE
READ/WRITE
READ/WRITE
-
READ/WRITE
-
-
-
-
-
-
-
READ/WRITE
WIDTH SIZE
(BITS) (BYTES)
16 32K
16 128K
16
2
7 1
8 1
1 -
1
-
1 -
1 -
1 -
1 -
1 -
1 -
- -
- -
- -
-
-
-
-
8 16
8 16
8
4
16 -
16 -
16 -
16 -
16 -
16 -
16 -
16 -
16
-
16 16K