Vax 613 0S Instruction Manual Page 271

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Offset Component Description
+192 Opwindow
up/down
A flag used to determine whether the Opwindow is on the
displayable screen on a graphics console.
+200 Head offset The offset to the head-specific data.
+208 TURBOchannel
option
PUTCHAR
pointer
The graphics console port driver uses this to output a
character when the console device is a TURBOchannel option.
+216 I/O state Flags to denote things such as CTRL-C, XON and XOFF
states.
+224 Listener state Flags to help monitor the state of the listener so we can
switch console to the NI when a remote console request is
received.
+232 Address of
the extended
information
The address of extended information such as the address of
the graphics page.
+240 TURBOchannel
slot number
The TURBOchannel slot number when the terminal type
is a graphics device. The low longword is used for graphics
output, while the high longword is used for graphic input. A
value of 0 means the kernel hardware is being used. A value
of 1 is slot 0; 2 is slot 1; 3 is slot 2, and so on.
+248 Server offset The offset to the server-specific data.
+256 Line
parameter
The offset to the line parameter data:
Parity type (default = OFF)
Number of stop bits (default = 1)
Character size (default = 8-bit)
Baud rate (default = 9600)
DEC 3000 AXP systems support these baud rates: 50, 75,
110, 134, 150, 300, 600, 1200, 1800, 2000, 2400, 3600, 4800,
7200, 9600, 19200, and 38400.
+264 Console-
specific data
16.5.4 HWRPB: Console Routine Block Portion
The console routine block (CRB) is a quadword-aligned structure built by the
console; the block’s physical address is determined by an offset from the start of
the HWRPB. This offset is saved at HWRPB[C0]. The CRB describes the location
and mapping of all the console routines and the I/O addresses used by the console
service routines.
Figure 30 shows the format of a console routine block. The next table lists the
components of the CRB.
Console 16–47
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