FAQs Archive for FIRE Emulator for SH2


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An Illegal-Slot-Instruction Exception occurs at a line with a correct opcode! (SH-2)
Ref: 0051

A Program-, Hll- or Spot-Breakpoint is set on this instruction and causes the exception. Set the breakpoint on the branch instruction before.

Contents of external memory can not be seen or changed in a data window in the CPU mode ROM! (SH-2)
Ref: 0055

The emulator uses the user data-bus of the bodout cpu for the access to external memorys. The initial value after a reset of the Pin-Function-Controller in the cpu mode ROM is, that the data-bus pins are used as port-pins. So, the Pin-Function-Controller must be changed to use this pins for the data-bus.

I can not see the CPUs internal RAM via dualport! (SH-2)
Ref: 0052

There is no dualport access to the on-chip RAM of the cpu in request mode, because this RAM is also physically internal at the bondout CPU. You can use the AUD mode with SH7055 to access the on-chip RAM.




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Last generated/modified: 02-Jan-2023