To Enable Or Disable Target Dtack For Emulation Memory Accesses - HP 68302 User Manual

Chapter 3: Configuring the Emulator
Setting the Hardware Options
To enable or disable target DTACK for emulation
memory accesses
1 Choose the Settings→Emulator Config→Hardware... (ALT, S, E, H)
command.
Select or deselect the Emulation memory use target DTACK check
2
box.
Choose the OK button to exit the Emulator Config dialog box.
3
The 68302 can generate an internal /DTACK. Internal DTACK can be
generated by chip selects or internal processor cycles. The source of the
/DTACK for chip selects in the emulator is determined by the chip select
configuration questions. If the /DTACK is internally generated, this /DTACK
will be driven to the target system and the emulator will not drive /DTACK to
the processor. /DTACK interlock only applies to situations where the 68302
does not provide an internal /DTACK.
When the check box is deselected, emulation memory and background
memory accesses are terminated by a /DTACK signal generated by the
emulator.
When the check box is selected, accesses to emulation memory will not be
terminated until the target system provides a /DTACK. If background cycles
are being driven to the target system, the target system MUST provide a
/DTACK signal to terminate background memory cycles.
When the emulator is not operating in a target system, all externally provided
/DTACK cycles are terminated by an emulator generated /DTACK signal.
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