User`s guide

NVRAM Partitioning
E.1 SSC RAM Layout
Table E–2 Bit Functions for NVR1
Field Name Description
2 MCS If set, indicates that the attached terminal supports
Multinational Character Set. If clear, MCS is not supported.
1 CRT If set, indicates that the attached terminal is a CRT. If clear,
indicates that the terminal is hardcopy.
E.1.1.3 Keyboard Status
Figure E–4 NVR2 (20140402)
76543210
NVR2
MLO-008654
KEYBOARD
Table E–3 Bit Functions for NVR2
Field Name Description
7:0 KEYBOARD This field indicates the national keyboard variant in use.
E.1.2 Service Vectors
Service vectors point to the routines for the reading or writing of characters by
the console.
E.1.3 Firmware Stack
This section contains the stack that is used by all of the firmware, with the
exception of VMB, which has its own built-in stack.
E.1.4 Diagnostic State
This area is used by the firmware resident diagnostics. It serves as the
primary communications mechanism between the diagnostics and the console
program.
E.1.5 USER Area
The KA52/53/54 console reserves the last longword (address 201407FC) of the
NVRAM for customer use. This location is not tested by the console firmware.
Its value is undefined.
NVRAM Partitioning E–3