IBM System/370 145 Reference Summary page 82

AL TER/DISPLAV FUNCTIONS
Alter Display Address Range
Storage Area
AM DM 0 Through 7FFFF
Mam Storage
AK
DK 0 Through 7FFFF
Storage Keys
AS
DS 0 Through FFFF
Control Storage
AL DL 00 Through 7F
Local Storage
AC DC 0 Through F
Control Registers
AG
DG 0 Through F
General Registers
AF DF 0, 2,4, 6
Float111g_Point R"l!'
AP DP
----
Current PSW
T T
Test
AV
DV 0 Through FFFFFF
Virtual Storage
ST
Store Status
No Pnntmg
Prog Status Stored
1n
MS
NOTES:
1. Expanded local storage (40 through 7F) can be
displayed but not altered.
2. The T mnemonic can be used to correct minor
mechanical typewriter problems between customer
jobs without the necessity of loading the micro-
diagnostic disk. Refer to GKTM routine.
3. When AM/DM is used, it is not necessary to type
a six-digit address. Example: To alter memory
location 0-type AMO; then carriage-return.
4. If a mistake is made while typing in data, instead
of trying to determine which byte to alter, type
in AM to the nearest word and use the space bar
to get the correct byte. Each pressing of the space
bar causes the character in storage to be printed.
PRINTER-KB SENSE INFORMATION
Bit
0
1
2
3
4-7
Meaning
Command Reject
Intervention Required
Bus-Out Check
Equipment Check
Not Used
6.3