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Local-Storage Allocations, Zone 5
AS or BS
LS
Field
Area
Decode
Code
Local-Storage Area
0000
uo
Line control word (LCW)
address, high-order btye
0001
U1
Line control word ( LCW)
address, low-order byte
0010
VO
Character service pointer,
high-order byte
0011
V1
Character service pointer,
low-order byte
0100
GO
Line control word (LCW)
0101
G1
Line control word (LCW) +1
0110
DO
Line control word ( LCW) +2
0111
D1
Line control word (LCW) +3
The following locations are shared between zones
4, 5, 6, and 7.
1000
10
CPU branch and link backup,
high-order byte
1001
11
CPU branch and link backup,
low-order byte
1010
TO
Comm chnl branch and link
function, high-order byte
1011
T1
Comm chnl branch and link
function, low-order byte
1100
PO
Level-1 working area
1101
P1
Level-1 working area
1110
HO
Level-1 working area
1111
H1
Level-1 working area
Figure 1-52.
local-Storage Deccdes when
Mode Register Bits 5-7 are
101:
communications Channel
Local-Storage Allocations, Zone 6
AS or BS
LS
Field
Area
Decode
Code
Local-Storage Area
0000
uo
Reader image buffer address,
high-order byte
0001
U1
Reader image buffer address,
low-order byte
0010
VO
Punch image card-image address,
high-order byte
0011
Vl
Punch image card-image address,
low-order byte
0100
GO
Punch trap count,
high-order byte
0101
Gl
Not used
0110
DO
Indicators
0111
D1
Reader trap count
The following locations are shared between zones
4, 5, 6, and 7.
1000
10
CPU branch and link backup,
high-order byte
1001
11
CPU branch and link backup,
low-order byte
1010
TO
Spare
1011
T1
Spare
1100
PO
Level-1 working area
1101
P1
Level-1 working area
1110
HO
Level-1 working area
1111
H1
Level-1 working area
Figure 1- 53.
Local- storage Decodes when
Mode Register Bits 5-7 are
110:
2540 Reader Punch
2025 FEMM (7/69} 1-69
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