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System Standard Procedures and Definitions
The relocatable element CERU$ is located in the EXEC system relocatable library file,
SYS$*RLIB$. CERU$ reserves 620 BDI values for users. The BDI values reserved for
users are
0400300 to 0400323
0400400 to 0400411
0400500 to 0400511
0400600 to 0400611
0400700 to 0400711
0401000 to 0401011
0401100 to 0401111
0401200 to 0401211
. . .
. . .
0403300 to 0403311
. . .
. . .
0407700 to 0407711
2.2. MAXR$–Register and Partial-Word Definitions
MAXR$ is a MASM definition mode (omnibus) element that defines mnemonic
designators for
• Control registers
• Base registers
• J-registers and staging registers
• Partial-word designators
For a complete description of these registers, refer to the applicable processor and
storage reference or the AIM Programming Reference Manual.
Table 2–1 lists the mnemonic designators and absolute addresses of control registers
and partial-word designators that MAXR$ contains.
All registers used in assembler programs must be defined. The following example
shows how to include MAXR$ in assembly language source code. MAXR$ defines the
register (A0) and J-designator (U).
$(1),START
$INCLUDE 'MAXR$'
L,U A0,1
ER EXIT$
$END START
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