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Kale Online Sleepy OP
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And I still have to add the two extra sound chips (ym2608) ...

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Kale Online Sleepy OP
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Fixed high mode RAM behaviour, it makes 177 to load proper "gameplay". It's weirdly a lot faster than it's supposed to be, dunno the reason so far ...
I was actually trying to fix Arkanoid with this, but it still refuse to run ... if I remove timer irq it boots with gameplay issues ...




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Wow, this is going back. I had a NEC-PC8801A as my first computer in like 81/82? Living in the US I don't even know how my dad got it, he worked at GTE about that time.. played a lot of Zork on it, laugh. The only graphic mode game was a Xevious knock off that I had to get from Japan through user groups and paper catalogs!

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Kale Online Sleepy OP
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Fixed ALU bankswitch priority issues, makes A.E. to boot
A game on which you shoots at ... mouse pointer formations. Seems very stupid as an idea, but game itself plays really hardcore-ish (I haven't even managed to finish level 1 after some plays). Might do a video of this once that I properly support ALU features:






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Played a fair amount of A.E. on the Atari Computer back in the day - I remember it being pretty brutal in the difficulty department.




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Kale Online Sleepy OP
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Last one for today, added a lot of gfx features (ALU, monochrome mode, analog display), some screens:

ALU (American Success)



Monochrome mode (Balance of Power)





Analog Colors (Ys 3)





(Bishoujo Baseball Gakuen)




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Very nice!

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Kale Online Sleepy OP
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Fixed a silly bug on my part with vram bank reading register, fixes at least booting in Arkanoid (at last!) and gfx garbage issues in Wanderers from Ys:




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Kale Online Sleepy OP
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Rewrote bankswitch model from scratch, now that I'm more confident with it. This will be also needed for supporting waitstate penalties at some point (some games are definitely too fast due of that).
Result of this rewriting is Tobira wo Akete booting again ... and yes I know, rewrites are supposed to break the games, not fix them wink



EDIT: here's what ALU is capable of, like stated previously: http://www.youtube.com/watch?v=FsgInRpboMc

Last edited by Kale; 01/19/11 04:47 PM.
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sorry for off-topic, but why PC-8801 has such strange resolution? super wide screens were common in Japan in 80's? wink

anyway, great work, Angelo!!


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