The ROM performs the memory test, copies setup code to RAM (that isn't there), returns and jumps into never never land because the stack pointer was never set due to loading it from page zero.
Turns out the HD6301/3 support in MAME is incomplete, it doesn't include the built in hardware and RAM.
There were several oversights in my code prior to last night's work, so it would have had problems anyway, but seriously? Someone couldn't take the time to inherit this from the 6801 emulation?
It's already there. I'll look at fixing this in the next day or two.
One of the problems with MAME is that they use a lot of macros to "simplify" supporting new systems, but it has the side effect of keeping developers that aren't familiar with them from seeing what is going on, or more appropriately, what is going wrong. Once I got around that hurdle, it was pretty easy to finish the HD6803 support in the MC-10 code. I still have to fix an issue with the Alice support this caused, but I'll cross that bridge when I get to it. Perhaps the most difficult part will be getting the MAME devs to accept these changes.
Turns out the HD6301/3 support in MAME is incomplete, it doesn't include the built in hardware and RAM.
There were several oversights in my code prior to last night's work, so it would have had problems anyway, but seriously? Someone couldn't take the time to inherit this from the 6801 emulation?
It's already there. I'll look at fixing this in the next day or two.
One of the problems with MAME is that they use a lot of macros to "simplify" supporting new systems, but it has the side effect of keeping developers that aren't familiar with them from seeing what is going on, or more appropriately, what is going wrong. Once I got around that hurdle, it was pretty easy to finish the HD6803 support in the MC-10 code. I still have to fix an issue with the Alice support this caused, but I'll cross that bridge when I get to it. Perhaps the most difficult part will be getting the MAME devs to accept these changes.
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