It is currently Thu Nov 23, 2017 11:50 am

All times are UTC - 7 hours





Post new topic Reply to topic  [ 2 posts ] 
Author Message
PostPosted: Mon Sep 04, 2017 2:37 pm 
Offline

Joined: Tue Oct 20, 2009 3:29 am
Posts: 31
I've try to repro datach game and put on BANDAI-LZ93D50 Board but all datach game use CHR-RAM. Game work find but graphic error. I don't know how to rewire 8k CHR RAM 28pin put on to 32pin BANDAI-LZ93D50 board.

Does anyone can help this?

Thank you.


Top
 Profile  
 
PostPosted: Mon Sep 04, 2017 3:48 pm 
Offline

Joined: Sun Apr 13, 2008 11:12 am
Posts: 6449
Location: UK (temporarily)
The Datach uses a different package for its LZ93D50 than the other parts. As far as we know, the IC itself is compatible, but it's hooked up differently and you'll have to rewire quite a lot.

Naruko has notes in Japanese: http://seesaawiki.jp/famicomcartridge/d/Bandai%20Datach ; http://seesaawiki.jp/famicomcartridge/d ... 20standard

Most pertinently, the Datach games do not support CHR RAM banking at all, and instead just support a flat 8 KiB chunk; additionally, if you want to support the external EEPROM, you'll have to disconnect PPU A12 from the IC and tie that input low.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 2 posts ] 

All times are UTC - 7 hours


Who is online

Users browsing this forum: No registered users and 12 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group