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Old Jan 27, 2002, 09:30 AM
ps2daddy ps2daddy is offline
Join Date: Aug 2001
Posts: 2,154
Default How a neo 2.2 works

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Just thought some of you might find this interesting

* PIN #1 = supplies + (power) to the chip
* PIN #2 = sends SCE signal out to PS 2
* PIN #3 = PS 2 drive tray pulse tells the BA5810FP chip whether to expect a drive tray open or close
* PIN #4 = checks/signals RESET button on the PS 2
* PIN #5 = closes PS 2 drive tray
* PIN #6 = opens PS 2 drive tray
* PIN #7 = checks if game CD is PSX/PS 2 (If PS 2, immediately stops SCE signal & restarts when a "tray close" is seen. If PSX, it stops after about 15-20 seconds)
* PIN #8 = supplies ground to the chip

What actually happens with Booting methods

A neo 2.2 chip does 2 things
1. Send the SCEA signal
2. Allow you to use the tray opening feature (the EA swap)

For PSone CD-R games
The chips sends the SCEA signal PS2 is happy game plays

For PS2 CD-R
You need a PS2 boot sequence thus the gameshark booting with its TOC when you open the tray the PS2 reads the TOC again but the GS (gameshark) counteracts this and then send the SCEA signal to play the game once you insert it

Works similar to CDs but Since you need a DVD TOC it will read on the second tray opening thus the EA method counteracts the TOC reading for the second swap. (Why we need pins 2, 3, 4,5,6 and 7)

Viola that is it!!!!!!
Old Jan 27, 2002, 01:43 PM
PS24LIFE PS24LIFE is offline
Join Date: Oct 2000
Posts: 1,703

good work ps2daddy

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