User manual

EMU3 emulator features UM0036
298/385 Doc ID 7705 Rev 11
Figure 230. Memory Access with Data dialog box
The dialog box at right is the same as for the Memory Access dialog box with the
addition of a field to specify a data value or range.
You must enter a First data value and then, in the drop-down box, specify whether you
want to give a Data range, or specify Selected bits.
If you select Data range, you will have to enter a Last data value (to complete the
range).
If you select Selected bits, the 8-bit data register appears, and you can choose to
ignore the value of certain bits in the particular data register you specified.
In the example shown in Figure 230, the first data value given is CD (or 205 in decimal
format). By masking the second and fourth bits as shown, we are actually specifying
any of the following values:.8D (or 141), 9D (or 157), DD (or 221), and of course, the
original value, CD (or 205).
● Opcode Fetch: An opcode fetch is carried out from a specified memory address or
range of addresses. In the dialog box shown in Figure 231, you must define a first
address under First Opcode fetch.
The address can be entered directly, or if you have placed a bookmark at the address
of interest, you can simply choose the bookmark (and the file in which it occurs) and
the address field is automatically calculated.
If you only specify one address, the Opcode Fetch must occur at this address. If you
want to specify a range of addresses which are monitored for opcode fetches, fill in the
2nd Opcode fetch section of the dialog box. Note that you can also enter the name of
the symbol in the Address field, and the address will be identified by STVD.