Siemens CPU 948 - Memory Access Using Absolute Addresses

Contents of Chapter 9
9.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 4
9.2 Memory Access via Addresses in ACCU 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 8
9.2.1 LIR/TIR: Loading to or Transferring from a 16-Bit Memory Area Indirectly. . . . . . . . . 9 - 9
9.2.2 Examples of Access to DW > 255 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 15
9.2.3 LDI/TDI: Loading to or Transferring from a 32-Bit Memory Area Indirectly . . . . . . . 9 - 17
9.3 Transferring Memory Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 19
9.4 Operations with the Base Address Register (BR Register). . . . . . . . . . . . . . . . . . . . . . . 9 - 22
9.4.1 Operations for Transfer between Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 23
9.4.2 Accessing the Local Memory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 24
9.4.3 Accessing the Global Memory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 25
9.4.4 Accessing the Dual-Port RAM Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 29
9
Memory Access Using
Absolute Addresses
CPU 948 Programming Guide
C79000-G8576-C848-04
9 - 1