Emulator kind of crashes after reset

sy2002 / QNICE-FPGA

QNICE-FPGA is a 16-bit computer system for recreational programming built as a fully-fledged System-on-a-Chip in portable VHDL.

http://qnice-fpga.com

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Closed sy2002 closed 3 years ago

sy2002 commented 3 years ago

This one is not urgent as the situation can only be provoked, when working with the reset command of the emulator.

Here it is:

sy2002 commented 3 years ago

sorry, wrong reproduction scheme. closing.

sy2002 commented 3 years ago

Well maybe it is the right reproduction scheme: @bernd-ulmann how should reset actually behave?

bernd-ulmann commented 3 years ago

Reset does the following as of now:

Clear all memory locations < IO_AREA_START.
Clear all registers.
Clear the shadow registers.
Reset all statistics counters.
Disable interrupts and clear a possibly pending interrupt.
Set the switch register to 3.

So after a reset, there is no monitor or anything else in memory. Every memory cell now contains MOVE R0, R0 (ie. a "NOP") and the PC increments until it starts reading (nonsense) from the IO area.

sy2002 commented 3 years ago

OK, then I guess this is behaving as intended. Closing.