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.mmregs
Assign Memory–Mapped Register Names as Global Symbols
4-70
Syntax
.mmregs
Description
The .mmregs directive defines global symbolic names for the ’C54x registers
and places them in the global symbol table. It is equivalent to executing AL .set
8, AH .set 9, etc. The symbols are local and absolute. Using the .mmregs direc-
tive makes it unnecessary to define these symbols.
Table 4–2. Memory-Mapped Registers
Name
Hexadecimal-
Address
Description
IMR
0000
Interrupt mask register
IFR
0001
Interrupt flag register
–
2–5
Reserved
ST0
0006
Status 0 register
ST1
0007
Status 1 register
AL
0008
A accumulator low (A [15:0])
AH
0009
A accumulator high (A [31:16])
AG
000A
A accumulator guard (A [39:32])
BL
000B
B accumulator low (B [15:0])
BH
000C
B accumulator high (B [31:16])
BG
000D
B accumulator guard (B [39:32])
T
000E
Temporary register
TRN
000F
Transition register
BK
0019
Circular size register
BRC
001A
Block repeat counter
RSA
001B
Block repeat start address
REA
001C
Block repeat end address
PMST
001D
PMST register
DRR0
0020
Data receive register 0
BDRR
0020
Data receive register
Note:
Duplication of address values in the table supports the different names of the registers
as they are implemented on different ’C54x devices.
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