What Needs to be done for a NeXT Emulator

[andreas_g]

@marvin
Thank you very much for testing! The result on the non-Turbo machine is surprsing. I'll have to investigate this.

If it is not too much effort could you redo the test but replace eb 0201a000 with eb 0211a000 (everything else unchanged)?

[marvin]

Hi @andreas_g ,

here are the new values from my non-turbo NeXTcube (ROM monitor 2.1 v59) with Pyro-card installed, so the values may be not standard:

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NeXT>eb 0211a000
211a000: 10? 0
211a001: ff? .
NeXT>eb 0211a000
211a000:  6d?
211a001:  6d?
211a002:  66?
211a003:  a3?  .
NeXT>eb 0211a000
211a000:  d6?
211a001:  d6?
211a002:  d1?
211a003:  01?  .
Here are the new values from my Turbo-Color slab (ROM monitor 3.1 v71) for the sake of completeness:

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NeXT>eb 0211a000
211a000: 00? 0
211a001: 0a? .
NeXT>eb 0211a000
211a000:  00?
211a001:  0e?
211a002:  2e?
211a003:  a5?  .
NeXT>eb 0211a000
211a000:  00?
211a001:  01?
211a002:  e5?
211a003:  c9?  .

[marvin]

Can confirm Previous 4.0 (r1755) is running fine with Debian 12 (x86-64) and SDL3.

I had to install my own version of SDL3.

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## unzip source code into src/ folder
cd /usr/local/Software/libs/x86_64/src/SDL3-3.4.0/

## https://wiki.libsdl.org/SDL3/README-cmake
cmake -S . -B build -DSDL_SHARED=ON -DSDL_STATIC=ON -DSDL_TESTS=ON
cmake --build build

mkdir /usr/local/Software/libs/x86_64/SDL3-3.4.0
cmake --install build --prefix /usr/local/Software/libs/x86_64/SDL3-3.4.0
Then compile Previous:

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cd /usr/local/Software/Previous/previous-code-r1755-trunk/
setenv SDL3_DIR /usr/local/Software/libs/x86_64/SDL3-3.4.0/lib/cmake/SDL3/ ; ./configure
make

[andreas_g]

@marvin
Thank you very much for testing again! The values on the Turbo make sense while those on the non-Turbo are still strange. Pyro does not affect this.

The event counter is a mystery to me. I think it should reset to zero if being written but it is unclear if it continues counting immediately after write or only if read afterwards.