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Dragon Ball Z II - Gekishin Freeza!! 4020B+PAL,IRQ is M2?
https://forums.nesdev.com/viewtopic.php?f=9&t=16758
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Author:  zxbdragon [ Wed Nov 29, 2017 8:06 pm ]
Post subject:  Dragon Ball Z II - Gekishin Freeza!! 4020B+PAL,IRQ is M2?

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Author:  krzysiobal [ Thu Nov 30, 2017 7:26 pm ]
Post subject:  Re: Dragon Ball Z II - Gekishin Freeza!! 4020B+PAL,IRQ is M

23C3662 is VRC2 (no IRQ, just micro wire eprom interface).
Original Dragon Ball Z 2 - Gekishin Freeza!! uses BANDAI mapper, which counts M2 cycles, so this one probably does the same, with ROM modified to work with VRC2 registeers and PAL serving as glue logic.
PAL might have 5 interna latches for for enhancing VRC2 H/V mirroring into H/V/0/1 and firing/acknowledging interrupt.

BTW. Would you be willing to borrow/sell this PCB for more deep analyze?

Author:  zxbdragon [ Thu Nov 30, 2017 10:47 pm ]
Post subject:  Re: Dragon Ball Z II - Gekishin Freeza!! 4020B+PAL,IRQ is M

krzysiobal wrote:
23C3662 is VRC2 (no IRQ, just micro wire eprom interface).
Original Dragon Ball Z 2 - Gekishin Freeza!! uses BANDAI mapper, which counts M2 cycles, so this one probably does the same, with ROM modified to work with VRC2 registeers and PAL serving as glue logic.
PAL might have 5 interna latches for for enhancing VRC2 H/V mirroring into H/V/0/1 and firing/acknowledging interrupt.

BTW. Would you be willing to borrow/sell this PCB for more deep analyze?


I in China. PCB not sell, It is possible to borrow.What nationglity are you?

Author:  krzysiobal [ Fri Dec 01, 2017 8:34 pm ]
Post subject:  Re: Dragon Ball Z II - Gekishin Freeza!! 4020B+PAL,IRQ is M

Poland, I can borrow it for testing & I can pay for shipping.

Author:  zxbdragon [ Mon Dec 04, 2017 7:01 pm ]
Post subject:  Re: Dragon Ball Z II - Gekishin Freeza!! 4020B+PAL,IRQ is M

solved,thank you! this game m2 IRQ.
解决了,谢谢你,这个游戏是M2的IRQ。
this cart:
这个卡:
AX5705, PRG not using VRC2 register,CHR using VRC2 register.
AX5705,PRG没有使用VRC2的注册端口,CHR使用VRC2的注册端口。

A000,SWAP 8000 4000 16K
9010,NMT VH01
F004,IRQ Acknowledge
F008,IRQ enabled;
F00c,IRQ disable;

game working,but EEPROM save version 93C56 not working.
游戏目前可以执行,但是EEPROM存档93c56不能使用。

so far,Has known China pirate version Dragon Ball Z series to working( except eeprom save not working....WIP....)
到目前为止,已知的中国盗版龙珠Z系列都可以执行了(除了eeprom存档不能工作....93c56正在研究中....)
Dragon Ball Z - Kyoushuu! Saiya Jin
Dragon Ball Z II - Gekishin Freeza!!
Dragon Ball Z III - Ressen Jinzou Ningen
Dragon Ball Z Gaiden - Saiya Jin Zetsumetsu Keikaku
Datach - Dragon Ball Z - Gekitou Tenkaichi Budou Kai

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