VRC2 pinout: Difference between revisions
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(Spent a few hours tracing, sure looks like VRC4 is the same pinout as VRC2. Or, if not, it's close enough that they should be both presented in the same page. Do we want to rename this page now?) |
m (Traced out pins 17 and 39) |
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.----\/----. | .----\/----. | ||
(n) PRG A13 -> |01 40| - +5V | (n) PRG A13 -> |01 40| - +5V | ||
(n) PRG A14 -> |02 39| - | (n) PRG A14 -> |02 39| -> PRG A17 (r) | ||
(s) PRG A1 -> |03 38| -> PRG A15 (r) | (s) PRG A1 -> |03 38| -> PRG A15 (r) | ||
(s) PRG A0 -> |04 37| <- PRG A12 (s) | (s) PRG A0 -> |04 37| <- PRG A12 (s) | ||
(n) CHR A12 -> |05 36| -> PRG A14 (r) | (n) CHR A12 -> |05 36| -> PRG A14 (r) | ||
(n) CHR A11 -> |06 35| -> PRG A13 (r) | (n) CHR A11 -> |06 35| -> PRG A13 (r) | ||
(n) CHR A10 -> |07 34| -> PRG A16 (r) | (n) CHR A10 -> |07 34| -> PRG A16 (r) | ||
(r) PRG /CE <- |08 33| <- PRG D0 (s) | (r) PRG /CE <- |08 33| <- PRG D0 (s) | ||
(n) PRG R/W -> |09 32| <- PRG D1 (s) | (n) PRG R/W -> |09 32| <- PRG D1 (s) | ||
(r) CHR /CE <- |10 31| <- PRG D2 (s) | (r) CHR /CE <- |10 31| <- PRG D2 (s) | ||
(n) CHR A13 -> |11 30| <- PRG D4 (s) | (n) CHR A13 -> |11 30| <- PRG D4 (s) | ||
(n) CHR /OE -> |12 29| <- PRG D3 (s) | (n) CHR /OE -> |12 29| <- PRG D3 (s) | ||
(n) CHR A10 -> |13 28| -> CHR A17 (r) | (n) CHR A10 -> |13 28| -> CHR A17 (r) | ||
(n) PRG /CE -> |14 27| -> CHR A15 (r) | (n) PRG /CE -> |14 27| -> CHR A15 (r) | ||
(n) M2 -> |15 26| -> CHR A12 (r) | (n) M2 -> |15 26| -> CHR A12 (r) | ||
NC - |16 25| -> CHR A14 (r) | NC - |16 25| -> CHR A14 (r) | ||
VRC4 only (n) /IRQ <- |17 24| -> CHR A13 (r) | |||
NC - |18 23| -> CHR A11 (r) | NC - |18 23| -> CHR A11 (r) | ||
NC - |19 22| -> CHR A16 (r) | NC - |19 22| -> CHR A16 (r) | ||
GND - |20 21| -> CHR A10 (r) | GND - |20 21| -> CHR A10 (r) | ||
`----------' | `----------' | ||
Revision as of 19:52, 27 April 2012
The Konami VRC2 and VRC4 chips come in 40-pin DIP packages :
- (s) means this pin is shared between rom, system and NES
- (r) this only connects to the ROM
- (n) means this pin is connected to the NES only
- CHR : these connect to the CHR ROM and/or fami's CHR pins
- PRG : these connect to the PRG ROM and/or fami's PRG pins
.----\/----.
(n) PRG A13 -> |01 40| - +5V
(n) PRG A14 -> |02 39| -> PRG A17 (r)
(s) PRG A1 -> |03 38| -> PRG A15 (r)
(s) PRG A0 -> |04 37| <- PRG A12 (s)
(n) CHR A12 -> |05 36| -> PRG A14 (r)
(n) CHR A11 -> |06 35| -> PRG A13 (r)
(n) CHR A10 -> |07 34| -> PRG A16 (r)
(r) PRG /CE <- |08 33| <- PRG D0 (s)
(n) PRG R/W -> |09 32| <- PRG D1 (s)
(r) CHR /CE <- |10 31| <- PRG D2 (s)
(n) CHR A13 -> |11 30| <- PRG D4 (s)
(n) CHR /OE -> |12 29| <- PRG D3 (s)
(n) CHR A10 -> |13 28| -> CHR A17 (r)
(n) PRG /CE -> |14 27| -> CHR A15 (r)
(n) M2 -> |15 26| -> CHR A12 (r)
NC - |16 25| -> CHR A14 (r)
VRC4 only (n) /IRQ <- |17 24| -> CHR A13 (r)
NC - |18 23| -> CHR A11 (r)
NC - |19 22| -> CHR A16 (r)
GND - |20 21| -> CHR A10 (r)
`----------'
