NEO-HYCS: Difference between revisions

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[[File:hycs.png|thumb]]
[[File:hycs.png|thumb]]


Tiny board to fix the [[V ROM]] address MSB on [[PROGBK2R]] carts.
Original bodge board from SNK to fix [[V ROM]] selection on a few {{PCB|PROGBK2R}} and {{PCB|PROGBK3R}} based carts:


MM311: Mitsumi PST600D reset generator (4.2V threshold).
* [[SNK_vs._Capcom_-_SVC_Chaos]]
* [[Samurai_Shodown_V]]


Apparently used to disable the V1 ROM for a short period at power on, possibly to allow [[NEO-PCM2]] to read the decryption parameters properly. Removing the board causes corrupt sound or games to show a "bank error".
MM311: Mitsumi PST600D reset generator (4.2V threshold). Forces V1 /CS high at startup, then lets the PCM2 signal through.
[[Category:Cartridge systems]]
[[Category:Chips]]
[[Category:Chips]]

Latest revision as of 14:41, 7 December 2022

Original bodge board from SNK to fix V ROM selection on a few PROGBK2R and PROGBK3R based carts:

Apparently used to disable the V1 ROM for a short period at power on, possibly to allow NEO-PCM2 to read the decryption parameters properly. Removing the board causes corrupt sound or games to show a "bank error".

MM311: Mitsumi PST600D reset generator (4.2V threshold). Forces V1 /CS high at startup, then lets the PCM2 signal through.