Print buffering and presentation storage – Visara LINCS Configuration User Manual
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Chapter 13. Device Options
707023-003
For each device attached to LINCS, 8K of screen image memory and 1K of session information
memory is allocated from base system memory. This allows devices to have a single session
(and in some cases limited MLS) without requiring feature memory.
When a device PORs, the amount of PS Storage memory to allocate is determined based
upon the Device Profile. The Device Profile indicates the number of sessions and whether or
not windowing and calculator memory will be required. If Presentation Space memory is not
available for all sessions, the Device will POR with as many sessions as available PS Storage
memory will allow. A device will always be able to POR with at least one session (session A).
If memory is not available to POR all sessions, a 285 error will be posted on the device’s
status line to indicate that some sessions are unavailable.
The following table lists the Presentation Space Memory memory requirements for MLS.
NUMBER OF HOST SESSIONS
E
Z
I
S
D
O
M
B
A
E
1
2
3
4
5
6
7
8
9
0
1
R
E
B
M
U
N
S
Y
A
L
P
S
I
D
*
Y
R
O
M
E
M
D
E
R
I
U
Q
E
R
L
A
T
O
T
)
0
8
X
4
2
(
2
O
N
0
1
2
3
6
9
2
1
5
1
8
1
1
2
_
_
_
_
_
*
_
_
_
_
_
_
_
_
_
_
_
=
)
0
8
x
2
3
(
3
O
N
)
0
8
x
3
4
(
4
O
N
0
1
6
1
1
6
1
1
2
6
2
1
3
6
3
1
4
_
_
_
_
_
*
_
_
_
_
_
_
_
_
_
_
_
=
)
2
3
1
x
7
2
(
5
O
N
)
0
8
X
4
2
(
2
S
E
Y
0
1
6
1
1
6
1
1
2
6
2
1
3
6
3
1
4
_
_
_
_
_
*
_
_
_
_
_
_
_
_
_
_
_
=
)
0
8
x
2
3
(
3
S
E
Y
)
0
8
x
3
4
(
4
S
E
Y
0
9
8
1
7
2
6
3
5
4
4
5
3
6
2
7
1
8
_
_
_
_
_
*
_
_
_
_
_
_
_
_
_
_
_
=
)
2
3
1
x
7
2
(
5
S
E
Y
E
S
A
B
K
4
>
S
E
Y
8
5
2
2
4
9
5
6
7
3
9
0
1
1
7
2
1
4
4
1
1
6
1
_
_
_
_
_
*
_
_
_
_
_
_
_
_
_
_
_
=
L
A
T
O
T
S
L
M
Y
R
O
M
E
M
_
_
_
_
_
_
=
To determine the amount of memory to allocate for MLS, count the number of displays
matching the description in a given row from the table. Enter this in the NUMBER
DISPLAYS column. Determine the average number of sessions configured on displays of
this type. Take the amount of memory required for that number of sessions and enter it in
the MEMORY REQUIRED column. Multiply the number of displays times the memory
required to get the total memory required for a given display type. Add up the memory
required for all types of displays and enter it in the Total MLS Memory Field. This determines
the total amount of memory for MLS.
Print Buffering and Presentation Storage
Presentation Space Storage memory is used to buffer a print from a display station when the
destination printer is busy at the time the print is initiated.
If Presentation Space memory is available when a display attempts a print, the display data
will be buffered and printed when the printer becomes available. If no PS memory is available
when a display attempts a print, the display will be inhibited (printer busy symbol will be
displayed) until the printer becomes available.