The t1042 processor core (e5500 core) does not support multi-threading, this feature is available starting from e6500 core.
So, in case of t1042 "virtual core" is equal to "physical core" - t1042 device has 4 physical cores. This is said in T1040 Reference Manual, Table 1-1 and, also, shown at Figure 1-2:

Have a great day,
Alexander
TIC
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