Effective Address Calculation; Figure 2.12 Branch Address Specification In Memory Indirect Mode - Hitachi H8S/2215 Series Hardware Manual

the memory operand is a word operand and the branch address is 16 bits long. In advanced mode
the memory operand is a longword operand, the first byte of which is assumed to be H'00.
Note that the first part of the address range is also the exception vector area. For further details,
refer to section 4, Exception Handling.
If an odd address is specified in word or longword memory access, or as a branch address, the least
significant bit is regarded as 0, causing data to be accessed or instruction code to be fetched at the
address preceding the specified address. (For further information, see section 2.5.2, Memory Data
Formats.)
Note: * Not available in this LSI.
Specified
by @aa:8
Note: * Normal mode is not available in this LSI.

Figure 2.12 Branch Address Specification in Memory Indirect Mode

2.7.9

Effective Address Calculation

Table 2.13 indicates how effective addresses are calculated in each addressing mode. In normal
mode the upper 8 bits of the effective address are ignored in order to generate a 16-bit address.
Branch address
(a) Normal Mode
*
Specified Reserved
by @aa:8
Branch address
(b) Advanced Mode
Rev. 3.0, 10/02, page 49 of 686