Bonza gambling cartridge

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krzysiobal
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Bonza gambling cartridge

Post by krzysiobal »

Finally someone showed me photos of this gambling cartridge Bonza so I
was able to find what is going on. Looks like all of this logic is used to deal with serial protocol of SIM cards.
Image
Image Image Image Image

I wonder why they just didn't replace all of it with single small CPLD like they did for Sega vesion:
Image

Now some Bonza card would be neccessary to find out what is transferred here and there (I guess they are interchangeable over different consoles?)

Code: Select all

SIM1 = small card on top side that contains backup of credits and some demos (?)
SIM2 = big card on bottom side that contains credits

=============================== $5000 (W) ===============================
At the beginning of CPU cycle, SIM1's & SIM2's CCVCC will be set to +5V

 76543210
[CcrdD.cd] @ 
 ||||| |+-- value to be written to SIM2 CCIO (when $5000.3 == 1)
 ||||| +--- SIM2 CCCLK latch
 ||||+----- SIM1/2 CCCIO data direction (0=from card, 1=to card)
 |||+------ value to be written to SIM1 CCIO (when $5000.3 == 1)
 ||+------- SIM1 CCRST latch
 |+-------- SIM1 CCCLK latch
 +--------- what drives SIM2 CCCLK: 0=$5000.1, 1=$5000.1 AND /M2

 
=============================== $5000 (R) ===============================
At the beginning of CPU cycle, SIM1's & SIM2's CCVCC will be set to +5V
 76543210
[jd.....d] @ 
 ||     +- value from SIM2 CCIO (when $5000.3 == 1)
 |+------- value from SIM1 CCIO (when $5000.3 == 1)
 +-------- value from SIM2 detector (when $5000.3 == 1): 0=card present, 1=no card

=============================== $6000 (R/W) ===============================
At the beginning of CPU cycle, SIM2's CCVCC will be set to 0V

=============================== $7000 (R/W) ===============================
At the beginning of CPU cycle, SIM1's CCVCC will be set to 0V

==========================================================================
Image My website: http://krzysiobal.com | Image My NES/FC flashcart: http://krzysiocart.com
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