Digital Equipment VAXstation I Service Manual page 38

PROGRAMMING INFORMATION
Table 2·1: VC:BOl Registers
+- .... - .. ·+ •• - ..• - - - •.••• - • - •• - ..• - - - - - •.• - - .• - - ••.•.•••••• - . - . -+
I ADDRESS*! NAME
+·. - ..•. - ·+-. - . - - .. - ...........
~
- .•..
~
- • - • - - . - - . - .•••... - - - - . - - ·+
BASE
BASE+2
BASE+4
BASE+6
BASE+8
BASE+lO
BASE+l2
BASE+l4
BASE+l6
through
BASE+31
BASE+32
BASE+34
BASE+36
BASE+38
BASE+40
BASE+42
BASE+44
BASE+46
BASE+48
BASE+ SO
BASE+52
BASE+54
BASE+56
through
BASE+62
CSR ·• Control and Status Register
cursor
X
Position
Mouse Position Register
(spare)
CRTC Address Pointer Register
CRTC Data Register
ICDR Interrupt Controller Data Register
ICSR Interrupt Controller Comm.and/Status Register
(spare)
(spare)
UART Mode Registers lA and 2A
UART Status/Clock Select Register A
UART Command Register A
UART Transmit/Receive Buffer A
(spare)
UART Interrupt Status/Mask Register
(spare)
(spare)
UART Mode Registers lB and 2B
UART Status/Clock Select Register B
UART Command Register B
UART Transmit/Receive Buffer B
(spare)
(spare)
+- ••• - - ••
·+-. - - - .... - ... - - - ................ - •....... - •....... - .
·+
* BASE
=
The CSR Base Address
2.1.l Control And Status Register
The CSR bits are described in Figure 2-1 and Table 2·2. Note
that following a Q22-bus BINIT, bits <06:02> a:e cleared(= 0).
15 14 13 12 11 10 09 08 07 06 OS 04 03 02 01 00
+···+···+···+···+···+···+-·-+·--+-·-+-··+··-+···+·-·+-·-+··-+·-·+
nu·S't3·BK2 BK! BKO.MSC.MSBiMSA:CUR:IEN TSTlVRB;FNCiVIDi nu.MOD
+·--+··-+·--+---+···+···+·--+···+···+---+···+···+···+··-+---+---+
ADDRESS
=
CSR
BASE
Figure 2·1: CSR Form.at
2-2