CPS2 Eprom and Jumper details
From pcbotaku
Audio Program[edit]
- location 1 & 2.
- Eprom size is always 128kb/1mbit.
- Function of pin 2 can be either A16 or GND.
- Function of pin 26 can be either A16 or GND.
To use a 27c1001/27c010, A16 goes to pin 2 and GND 26 - this translates to a COOC (closed/open)configuration for JP1,2,3,4 and JP5,6,8,9.
Main Program[edit]
- location 3-10.
- Eprom size is always 512kb/4mbit.
Q-Sound samples[edit]
- location 11(JP10,JP11) and 12(JP12,JP13)
- Eprom size can be 2mb/16mbit or 4mb/32mbit.
- Function of pin 32 can be be either A20 or VCC.
To use 27c160, pin 32 needs to be VCC - this means closed/open.
To use 27c322, pin 32 is A20 - this means open/cosed
Graphics[edit]
- Location 13-20.
- Eprom size can be 512kb/4mbit, 1mb/8mbit, 2mb/16mbit or 4mb/32mbit.
- Function of pin 32 can be be either A20 or VCC.
Jumpers[edit]
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A common piece used by Capcom is MX23c1610, this piece has byte mode select pin #32, this need to be pulled high for the piece to opearate in 16 bit mode.
Known maskroms[edit]
- KM23c32000A-15, 32mbit, Samsung, 15ns, A20 on pin32
- MX23c1610, 16mbit, Macronix, ?, Word select on pin #32
- km23c8100C, 8 mbit, Samsung, 15ns, word select on pin #32
