Renesas SuperH SH7339 - Manual (Page 21)

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The internal I/O registers can be accessed from the [IO] window. However, note the
following when accessing the SDMR register of the bus-state controller. Before accessing
the SDMR register, specify addresses to be accessed in the I/O-register definition file
(SH7339.IO) and then activate the HEW. After the I/O-register definition file is created,
the MPU’s specifications may be changed. If each I/O register in the I/O-register
definition file differs from addresses described in the hardware manual, change the I/O-
register definition file according to the description in the hardware manual. The I/O-
register definition file can be customized depending on its format. Note that, however, the
E10A emulator does not support the bit-field function.
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Verify
In the [IO] window, the verify function of the input value is disabled.
16. Illegal Instructions
If illegal instructions are executed by STEP-type commands, the emulator cannot go to the
next program counter.