Interrupt Controller Registers; Icdr Format - Digital Equipment VAXstation I Service Manual

PROGRAMMING INFORMATION
2.1.s Interrupt Controller Reqisters
2.1.s.1 ICDR - The Interrupt Controller Data Register contains
the data for/from the internal Interrupt Controller register
addressed by the last Preselect command (see ICSR, below).
15
08 07
00
+ - - - • • • - • • • • • • - - • • • • • • • • - • • • - • - - + - - - - - - • - • - - • - - • - - - - - - - - - - - - - • • - +
not used
!
DATA
+· - - . - • - - - . - • - - - ... - - .. - .. - .• - -
·+- - - - - - - - - - • - - - - - - - - - . - - - •. - - - •
-+
ADDRESS • CSR BASE
+
12
Figure
2·6:
ICDR Format
I
Table
2·8:
ICDR Bits
+· .•. - .. -+- ... - - -
-+- - • - • - - •• - - • - - - - - - - - - - •• - - - ••••• - •• - - - • - •• - •
·+
l
BITS I ACCESS
!
DESCRIPTION
+- .....• ·+·. - • - . - -+- .. - - •.•• - - - - - - - • - - - .• - • - • - - - • - - - - - • - •..•.•. ·+
<15:08>
(not used)
<07:08>
RD/WR Interrupt Controller internal register data
+-. - - - . - ·+-. - . - - - -+- .•.••.. - .... - •••.•••• - • - - - .••.• - - - • - - - - - - - • ·+
2.1.5.2 ICSR - The internal Interrupt
accessed through the ICDR (above)
controller Command/Status Register).
register on write operations and
operations.
Controller registers are
and the ICSR (Interrupt
The ICSR is a command
a status register on read
READ:
15
08 07 06 05 04 03 02
00
+· ..•..... - ......... - ..•..••... -+-. ·+·. ·+-. ·+·. ·+·. ·+- •.. - . - ... ·+
not used ,GRiiENAiPRM:INM MMS.IRR VECTOR
+· .............. - . - - - - - - - . - . - . - -+-. -+- - ·+·. -+· - ·+·. ·+· - . - .. - .. - -+
WRITE::
15
08 07
00
+· - . - . - ....... - . - - . - - - .. - . - . - - . ·+· .. - - - - - . - ...... - - ... - .. - - - - ..
·+
not used COfilMAND
+ - - - - - - - . • - - - • - - - - - - - - - - - - - - . - - - + - - • • - • • • - - - - - - - - - - - - • • . - - - - - • - •
+
ADDRESS
=
CSR BASE
+
14
Figure 2·7: ICSR Format
2-7