Partytap: Difference between revisions
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(Created page with "The Partytap is used in the following games: *''Casino Derby'' *''Gimmi a Break - Shijou Saikyou no Quiz OuKetteisen'' *''Gimmi a Break - Shijou Saikyou no Quiz OuKetteisen 2'...") |
(link to summary (mostly in japanese) on the forum) |
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== References == | == References == | ||
* nocash's NES documentation: http://problemkaputt.de/everynes.htm#controllerspushbuttons | * nocash's NES documentation: http://problemkaputt.de/everynes.htm#controllerspushbuttons | ||
* https://forums.nesdev.org/viewtopic.php?t=903 | |||
Revision as of 23:14, 14 October 2017
The Partytap is used in the following games:
- Casino Derby
- Gimmi a Break - Shijou Saikyou no Quiz OuKetteisen
- Gimmi a Break - Shijou Saikyou no Quiz OuKetteisen 2
- Project Q
It consists of 6 separate 1-button controllers (labelled buttons 1 to 6 below)
Hardware interface
Input ($4016 write)
7 bit 0
---- ----
xxxx xxxS
|
+- Controller shift register strobe
Output ($4017 read)
7 bit 0 ---- ---- xxxC BAxx | || | |+- Serial data (Button 1, Button 4) | +-- Serial data (Button 2, Button 5) +---- Serial data (Button 3, Button 6)
The first read returns the state of buttons 1 to 3, the 2nd read gives buttons 4 to 6. The third read apparently returns a detection value ($14).
The device supposedly requires a relatively large number of cycles between writes/reads (games wait up to 80-500 cycles in-between some operations).
References
- nocash's NES documentation: http://problemkaputt.de/everynes.htm#controllerspushbuttons
- https://forums.nesdev.org/viewtopic.php?t=903
