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Description |
I don't know why I continue to help... however here are two small fixes:
1) To pass the input tests the procedure at 0x4304 requires that all inputs must return 1 as initial state.
So the commented rows in spool99_io_r were correct. (Unknown/Unhandled inputs 0xAFD9, 0xAFDB, 0xAFE5, 0xAFE6 must return 1).
This fixes the 'INPUT BAD' message.
2) The eeprom implementation is correct, what is not hooked up is nvram!
The game saves bookkeeping (CONTABILITA), statistics (STATISTICHE) and inserted credits (CREDITI) in ram, not in the EEprom.
Furthermore, the game, to boot up, expects (at least) some initial values in ram (Ram test procedure at 0x196E):
ram [0xDF57] = 0xAB;
ram [0xDF5D] = 0x07;
ram [0xDF63] = 0x05;
ram [0xDF71] = 0x06;
ram [0xDF77] = 0x12;
These (and other) values are written by the init ram procedure when you press Start + Service 1 at boot.
So I implementend nvram by 'splitting' last part of ram:
AM_RANGE (0xB800, 0xDEFF) AM_RAM
AM_RANGE (0xDF00, 0xDFFF) AM_RAM AM_SHARE ("nvram") // Not sure about the size (I haven't found a clear PCB image)
and of course by adding:
MCFG_NVRAM_ADD_0FILL ("nvram") in MACHINE_CONFIG_START.
This fixes the 'RAM BAD' message after the first nvram init.
PS:
To the great admin Fujix: I'd recommend you to ignore or even close this report!
Even though the entire report is related to the same game, it contains two fixes instead of one! (It may be very dangerous!!) |
